Origin of the Urucum iron formations (Neoproterozoic, Brazil): Textural and mineralogical evidence (Mato Grosso do Sul – Brazil)
Neoproterozoic banded iron formations (BIF) and ironstones occur in the Urucum mining district (Pantanal, Brazil). Microbially mediated formation as microbialites has been proposed for these deposits. This study aims to provide a high resolution characterization of micro-textural features, mineral a...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Polgári, Márta [verfasserIn] Biondi, Joăo Carlos [verfasserIn] Gyollai, Ildikó [verfasserIn] Fintor, Krisztián [verfasserIn] Szabó, Máté [verfasserIn] |
|---|
| Format: |
E-Artikel |
|---|---|
| Sprache: |
Englisch |
| Erschienen: |
2021 |
|---|
| Schlagwörter: |
|---|
| Übergeordnetes Werk: |
Enthalten in: Ore geology reviews - Amsterdam [u.a.] : Elsevier, 1986, 139 |
|---|---|
| Übergeordnetes Werk: |
volume:139 |
| DOI / URN: |
10.1016/j.oregeorev.2021.104456 |
|---|
| Katalog-ID: |
ELV007035942 |
|---|
| LEADER | 01000caa a22002652 4500 | ||
|---|---|---|---|
| 001 | ELV007035942 | ||
| 003 | DE-627 | ||
| 005 | 20230524132602.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 230506s2021 xx |||||o 00| ||eng c | ||
| 024 | 7 | |a 10.1016/j.oregeorev.2021.104456 |2 doi | |
| 035 | |a (DE-627)ELV007035942 | ||
| 035 | |a (ELSEVIER)S0169-1368(21)00482-0 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rda | ||
| 041 | |a eng | ||
| 082 | 0 | 4 | |a 550 |q DE-600 |
| 084 | |a 38.52 |2 bkl | ||
| 084 | |a 57.20 |2 bkl | ||
| 100 | 1 | |a Polgári, Márta |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Origin of the Urucum iron formations (Neoproterozoic, Brazil): Textural and mineralogical evidence (Mato Grosso do Sul – Brazil) |
| 264 | 1 | |c 2021 | |
| 336 | |a nicht spezifiziert |b zzz |2 rdacontent | ||
| 337 | |a Computermedien |b c |2 rdamedia | ||
| 338 | |a Online-Ressource |b cr |2 rdacarrier | ||
| 520 | |a Neoproterozoic banded iron formations (BIF) and ironstones occur in the Urucum mining district (Pantanal, Brazil). Microbially mediated formation as microbialites has been proposed for these deposits. This study aims to provide a high resolution characterization of micro-textural features, mineral assemblage and distribution to gather evidence for two microbial ore forming systems: Fe- and Mn-oxidizing metabolic processes and cyanobacterial activity Optical- and cathodoluminescence rock microscopy, Fourier Transform Infrared (FTIR), and Raman spectroscopy allowed the identification of syngenetic and diagenetic minerals. Evidence from BIF and nodule samples points to low temperature, suboxic, neutral/slightly alkaline formation conditions, but rarely diagenetic acidic and anoxic local conditions occurred. Direct evidence for the action of microorganisms is: (a) microtextural evidence of microbially mediated formation of the ore beds, which occur as microbialites; (b) mineral types of syngenetic origin (ferrihydrite, todorokite, manganite) with various types of organic matter incorporated, (c) light isotope signal (cited negative hematite δ57Fe) and; (d) mineralized sedimentation cycles of Fe, Mn, Ca and Si. Two microbial ore forming systems are proposed as dual systems, characterized by the main Fe- and Mn-oxidizing metabolic processes and intense cyanobacterial activity. More ordered minerals, such as hematite, goethite and anatase, formed during diagenesis of Fe-rich biomat. Calcite-type (calcite, Mn-calcite, rhodochrosite) and dolomite-type carbonate structures (kutnohorite, ankerite, dolomite) occurred. Fine-grained carbonate is the common constituent, with some idiomorphic occurrences and dissemination in the laminae and nodules. The composition of the ankerite and the other carbonates is highly variable. The BIF’s gray laminae consist of hematite-rich part with minor quartz, scarce carbonate and apatite. The red laminae contain high contents of carbonate and hematite, with quartz and further diagenetic minerals (feldspar, apatite). Hematite occurs in considerable amount, but it is enough only for turning jasper reddish in color. Nodules were segregated from laminae by diapirism and/or microbial activity and underwent the same syngenetic and diagenetic changes as the microlayers from which they are segregated. Nodule compositions fit well with the diagenetic trends common in such ore forming systems. Most likely the differences between laminae and nodules are consequences of different initial organic matter contents and fine alternation of the oxygen supply of the system. | ||
| 650 | 4 | |a Urucum (Brazil) | |
| 650 | 4 | |a Neoproterozoic BIF | |
| 650 | 4 | |a Microbialite | |
| 650 | 4 | |a BIF’s syn/early diagenesis | |
| 700 | 1 | |a Biondi, Joăo Carlos |e verfasserin |4 aut | |
| 700 | 1 | |a Gyollai, Ildikó |e verfasserin |4 aut | |
| 700 | 1 | |a Fintor, Krisztián |e verfasserin |4 aut | |
| 700 | 1 | |a Szabó, Máté |e verfasserin |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t Ore geology reviews |d Amsterdam [u.a.] : Elsevier, 1986 |g 139 |h Online-Ressource |w (DE-627)32461635X |w (DE-600)2029106-1 |w (DE-576)259485551 |x 1872-7360 |7 nnns |
| 773 | 1 | 8 | |g volume:139 |
| 912 | |a GBV_USEFLAG_U | ||
| 912 | |a SYSFLAG_U | ||
| 912 | |a GBV_ELV | ||
| 912 | |a SSG-OPC-GGO | ||
| 912 | |a SSG-OPC-GEO | ||
| 912 | |a GBV_ILN_20 | ||
| 912 | |a GBV_ILN_22 | ||
| 912 | |a GBV_ILN_23 | ||
| 912 | |a GBV_ILN_24 | ||
| 912 | |a GBV_ILN_31 | ||
| 912 | |a GBV_ILN_32 | ||
| 912 | |a GBV_ILN_40 | ||
| 912 | |a GBV_ILN_60 | ||
| 912 | |a GBV_ILN_62 | ||
| 912 | |a GBV_ILN_63 | ||
| 912 | |a GBV_ILN_65 | ||
| 912 | |a GBV_ILN_69 | ||
| 912 | |a GBV_ILN_70 | ||
| 912 | |a GBV_ILN_73 | ||
| 912 | |a GBV_ILN_74 | ||
| 912 | |a GBV_ILN_90 | ||
| 912 | |a GBV_ILN_95 | ||
| 912 | |a GBV_ILN_100 | ||
| 912 | |a GBV_ILN_105 | ||
| 912 | |a GBV_ILN_110 | ||
| 912 | |a GBV_ILN_150 | ||
| 912 | |a GBV_ILN_151 | ||
| 912 | |a GBV_ILN_187 | ||
| 912 | |a GBV_ILN_213 | ||
| 912 | |a GBV_ILN_224 | ||
| 912 | |a GBV_ILN_230 | ||
| 912 | |a GBV_ILN_370 | ||
| 912 | |a GBV_ILN_602 | ||
| 912 | |a GBV_ILN_702 | ||
| 912 | |a GBV_ILN_2003 | ||
| 912 | |a GBV_ILN_2004 | ||
| 912 | |a GBV_ILN_2005 | ||
| 912 | |a GBV_ILN_2007 | ||
| 912 | |a GBV_ILN_2008 | ||
| 912 | |a GBV_ILN_2009 | ||
| 912 | |a GBV_ILN_2011 | ||
| 912 | |a GBV_ILN_2014 | ||
| 912 | |a GBV_ILN_2015 | ||
| 912 | |a GBV_ILN_2020 | ||
| 912 | |a GBV_ILN_2021 | ||
| 912 | |a GBV_ILN_2025 | ||
| 912 | |a GBV_ILN_2027 | ||
| 912 | |a GBV_ILN_2034 | ||
| 912 | |a GBV_ILN_2038 | ||
| 912 | |a GBV_ILN_2044 | ||
| 912 | |a GBV_ILN_2048 | ||
| 912 | |a GBV_ILN_2049 | ||
| 912 | |a GBV_ILN_2050 | ||
| 912 | |a GBV_ILN_2056 | ||
| 912 | |a GBV_ILN_2059 | ||
| 912 | |a GBV_ILN_2061 | ||
| 912 | |a GBV_ILN_2064 | ||
| 912 | |a GBV_ILN_2065 | ||
| 912 | |a GBV_ILN_2068 | ||
| 912 | |a GBV_ILN_2106 | ||
| 912 | |a GBV_ILN_2111 | ||
| 912 | |a GBV_ILN_2112 | ||
| 912 | |a GBV_ILN_2113 | ||
| 912 | |a GBV_ILN_2118 | ||
| 912 | |a GBV_ILN_2122 | ||
| 912 | |a GBV_ILN_2129 | ||
| 912 | |a GBV_ILN_2143 | ||
| 912 | |a GBV_ILN_2147 | ||
| 912 | |a GBV_ILN_2148 | ||
| 912 | |a GBV_ILN_2152 | ||
| 912 | |a GBV_ILN_2153 | ||
| 912 | |a GBV_ILN_2190 | ||
| 912 | |a GBV_ILN_2232 | ||
| 912 | |a GBV_ILN_2336 | ||
| 912 | |a GBV_ILN_2470 | ||
| 912 | |a GBV_ILN_2507 | ||
| 912 | |a GBV_ILN_2522 | ||
| 912 | |a GBV_ILN_4035 | ||
| 912 | |a GBV_ILN_4037 | ||
| 912 | |a GBV_ILN_4112 | ||
| 912 | |a GBV_ILN_4125 | ||
| 912 | |a GBV_ILN_4126 | ||
| 912 | |a GBV_ILN_4242 | ||
| 912 | |a GBV_ILN_4251 | ||
| 912 | |a GBV_ILN_4305 | ||
| 912 | |a GBV_ILN_4313 | ||
| 912 | |a GBV_ILN_4322 | ||
| 912 | |a GBV_ILN_4323 | ||
| 912 | |a GBV_ILN_4324 | ||
| 912 | |a GBV_ILN_4325 | ||
| 912 | |a GBV_ILN_4326 | ||
| 912 | |a GBV_ILN_4333 | ||
| 912 | |a GBV_ILN_4334 | ||
| 912 | |a GBV_ILN_4335 | ||
| 912 | |a GBV_ILN_4338 | ||
| 912 | |a GBV_ILN_4393 | ||
| 912 | |a GBV_ILN_4700 | ||
| 936 | b | k | |a 38.52 |j Geologie der Erze |
| 936 | b | k | |a 57.20 |j Exploration und Prospektion von Bodenschätzen |
| 951 | |a AR | ||
| 952 | |d 139 | ||
| author_variant |
m p mp j c b jc jcb i g ig k f kf m s ms |
|---|---|
| matchkey_str |
article:18727360:2021----::rgnfhuuuiofrainnortrzibaitxuaadieaoiaei |
| hierarchy_sort_str |
2021 |
| bklnumber |
38.52 57.20 |
| publishDate |
2021 |
| allfields |
10.1016/j.oregeorev.2021.104456 doi (DE-627)ELV007035942 (ELSEVIER)S0169-1368(21)00482-0 DE-627 ger DE-627 rda eng 550 DE-600 38.52 bkl 57.20 bkl Polgári, Márta verfasserin aut Origin of the Urucum iron formations (Neoproterozoic, Brazil): Textural and mineralogical evidence (Mato Grosso do Sul – Brazil) 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Neoproterozoic banded iron formations (BIF) and ironstones occur in the Urucum mining district (Pantanal, Brazil). Microbially mediated formation as microbialites has been proposed for these deposits. This study aims to provide a high resolution characterization of micro-textural features, mineral assemblage and distribution to gather evidence for two microbial ore forming systems: Fe- and Mn-oxidizing metabolic processes and cyanobacterial activity Optical- and cathodoluminescence rock microscopy, Fourier Transform Infrared (FTIR), and Raman spectroscopy allowed the identification of syngenetic and diagenetic minerals. Evidence from BIF and nodule samples points to low temperature, suboxic, neutral/slightly alkaline formation conditions, but rarely diagenetic acidic and anoxic local conditions occurred. Direct evidence for the action of microorganisms is: (a) microtextural evidence of microbially mediated formation of the ore beds, which occur as microbialites; (b) mineral types of syngenetic origin (ferrihydrite, todorokite, manganite) with various types of organic matter incorporated, (c) light isotope signal (cited negative hematite δ57Fe) and; (d) mineralized sedimentation cycles of Fe, Mn, Ca and Si. Two microbial ore forming systems are proposed as dual systems, characterized by the main Fe- and Mn-oxidizing metabolic processes and intense cyanobacterial activity. More ordered minerals, such as hematite, goethite and anatase, formed during diagenesis of Fe-rich biomat. Calcite-type (calcite, Mn-calcite, rhodochrosite) and dolomite-type carbonate structures (kutnohorite, ankerite, dolomite) occurred. Fine-grained carbonate is the common constituent, with some idiomorphic occurrences and dissemination in the laminae and nodules. The composition of the ankerite and the other carbonates is highly variable. The BIF’s gray laminae consist of hematite-rich part with minor quartz, scarce carbonate and apatite. The red laminae contain high contents of carbonate and hematite, with quartz and further diagenetic minerals (feldspar, apatite). Hematite occurs in considerable amount, but it is enough only for turning jasper reddish in color. Nodules were segregated from laminae by diapirism and/or microbial activity and underwent the same syngenetic and diagenetic changes as the microlayers from which they are segregated. Nodule compositions fit well with the diagenetic trends common in such ore forming systems. Most likely the differences between laminae and nodules are consequences of different initial organic matter contents and fine alternation of the oxygen supply of the system. Urucum (Brazil) Neoproterozoic BIF Microbialite BIF’s syn/early diagenesis Biondi, Joăo Carlos verfasserin aut Gyollai, Ildikó verfasserin aut Fintor, Krisztián verfasserin aut Szabó, Máté verfasserin aut Enthalten in Ore geology reviews Amsterdam [u.a.] : Elsevier, 1986 139 Online-Ressource (DE-627)32461635X (DE-600)2029106-1 (DE-576)259485551 1872-7360 nnns volume:139 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2106 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 38.52 Geologie der Erze 57.20 Exploration und Prospektion von Bodenschätzen AR 139 |
| spelling |
10.1016/j.oregeorev.2021.104456 doi (DE-627)ELV007035942 (ELSEVIER)S0169-1368(21)00482-0 DE-627 ger DE-627 rda eng 550 DE-600 38.52 bkl 57.20 bkl Polgári, Márta verfasserin aut Origin of the Urucum iron formations (Neoproterozoic, Brazil): Textural and mineralogical evidence (Mato Grosso do Sul – Brazil) 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Neoproterozoic banded iron formations (BIF) and ironstones occur in the Urucum mining district (Pantanal, Brazil). Microbially mediated formation as microbialites has been proposed for these deposits. This study aims to provide a high resolution characterization of micro-textural features, mineral assemblage and distribution to gather evidence for two microbial ore forming systems: Fe- and Mn-oxidizing metabolic processes and cyanobacterial activity Optical- and cathodoluminescence rock microscopy, Fourier Transform Infrared (FTIR), and Raman spectroscopy allowed the identification of syngenetic and diagenetic minerals. Evidence from BIF and nodule samples points to low temperature, suboxic, neutral/slightly alkaline formation conditions, but rarely diagenetic acidic and anoxic local conditions occurred. Direct evidence for the action of microorganisms is: (a) microtextural evidence of microbially mediated formation of the ore beds, which occur as microbialites; (b) mineral types of syngenetic origin (ferrihydrite, todorokite, manganite) with various types of organic matter incorporated, (c) light isotope signal (cited negative hematite δ57Fe) and; (d) mineralized sedimentation cycles of Fe, Mn, Ca and Si. Two microbial ore forming systems are proposed as dual systems, characterized by the main Fe- and Mn-oxidizing metabolic processes and intense cyanobacterial activity. More ordered minerals, such as hematite, goethite and anatase, formed during diagenesis of Fe-rich biomat. Calcite-type (calcite, Mn-calcite, rhodochrosite) and dolomite-type carbonate structures (kutnohorite, ankerite, dolomite) occurred. Fine-grained carbonate is the common constituent, with some idiomorphic occurrences and dissemination in the laminae and nodules. The composition of the ankerite and the other carbonates is highly variable. The BIF’s gray laminae consist of hematite-rich part with minor quartz, scarce carbonate and apatite. The red laminae contain high contents of carbonate and hematite, with quartz and further diagenetic minerals (feldspar, apatite). Hematite occurs in considerable amount, but it is enough only for turning jasper reddish in color. Nodules were segregated from laminae by diapirism and/or microbial activity and underwent the same syngenetic and diagenetic changes as the microlayers from which they are segregated. Nodule compositions fit well with the diagenetic trends common in such ore forming systems. Most likely the differences between laminae and nodules are consequences of different initial organic matter contents and fine alternation of the oxygen supply of the system. Urucum (Brazil) Neoproterozoic BIF Microbialite BIF’s syn/early diagenesis Biondi, Joăo Carlos verfasserin aut Gyollai, Ildikó verfasserin aut Fintor, Krisztián verfasserin aut Szabó, Máté verfasserin aut Enthalten in Ore geology reviews Amsterdam [u.a.] : Elsevier, 1986 139 Online-Ressource (DE-627)32461635X (DE-600)2029106-1 (DE-576)259485551 1872-7360 nnns volume:139 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2106 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 38.52 Geologie der Erze 57.20 Exploration und Prospektion von Bodenschätzen AR 139 |
| allfields_unstemmed |
10.1016/j.oregeorev.2021.104456 doi (DE-627)ELV007035942 (ELSEVIER)S0169-1368(21)00482-0 DE-627 ger DE-627 rda eng 550 DE-600 38.52 bkl 57.20 bkl Polgári, Márta verfasserin aut Origin of the Urucum iron formations (Neoproterozoic, Brazil): Textural and mineralogical evidence (Mato Grosso do Sul – Brazil) 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Neoproterozoic banded iron formations (BIF) and ironstones occur in the Urucum mining district (Pantanal, Brazil). Microbially mediated formation as microbialites has been proposed for these deposits. This study aims to provide a high resolution characterization of micro-textural features, mineral assemblage and distribution to gather evidence for two microbial ore forming systems: Fe- and Mn-oxidizing metabolic processes and cyanobacterial activity Optical- and cathodoluminescence rock microscopy, Fourier Transform Infrared (FTIR), and Raman spectroscopy allowed the identification of syngenetic and diagenetic minerals. Evidence from BIF and nodule samples points to low temperature, suboxic, neutral/slightly alkaline formation conditions, but rarely diagenetic acidic and anoxic local conditions occurred. Direct evidence for the action of microorganisms is: (a) microtextural evidence of microbially mediated formation of the ore beds, which occur as microbialites; (b) mineral types of syngenetic origin (ferrihydrite, todorokite, manganite) with various types of organic matter incorporated, (c) light isotope signal (cited negative hematite δ57Fe) and; (d) mineralized sedimentation cycles of Fe, Mn, Ca and Si. Two microbial ore forming systems are proposed as dual systems, characterized by the main Fe- and Mn-oxidizing metabolic processes and intense cyanobacterial activity. More ordered minerals, such as hematite, goethite and anatase, formed during diagenesis of Fe-rich biomat. Calcite-type (calcite, Mn-calcite, rhodochrosite) and dolomite-type carbonate structures (kutnohorite, ankerite, dolomite) occurred. Fine-grained carbonate is the common constituent, with some idiomorphic occurrences and dissemination in the laminae and nodules. The composition of the ankerite and the other carbonates is highly variable. The BIF’s gray laminae consist of hematite-rich part with minor quartz, scarce carbonate and apatite. The red laminae contain high contents of carbonate and hematite, with quartz and further diagenetic minerals (feldspar, apatite). Hematite occurs in considerable amount, but it is enough only for turning jasper reddish in color. Nodules were segregated from laminae by diapirism and/or microbial activity and underwent the same syngenetic and diagenetic changes as the microlayers from which they are segregated. Nodule compositions fit well with the diagenetic trends common in such ore forming systems. Most likely the differences between laminae and nodules are consequences of different initial organic matter contents and fine alternation of the oxygen supply of the system. Urucum (Brazil) Neoproterozoic BIF Microbialite BIF’s syn/early diagenesis Biondi, Joăo Carlos verfasserin aut Gyollai, Ildikó verfasserin aut Fintor, Krisztián verfasserin aut Szabó, Máté verfasserin aut Enthalten in Ore geology reviews Amsterdam [u.a.] : Elsevier, 1986 139 Online-Ressource (DE-627)32461635X (DE-600)2029106-1 (DE-576)259485551 1872-7360 nnns volume:139 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2106 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 38.52 Geologie der Erze 57.20 Exploration und Prospektion von Bodenschätzen AR 139 |
| allfieldsGer |
10.1016/j.oregeorev.2021.104456 doi (DE-627)ELV007035942 (ELSEVIER)S0169-1368(21)00482-0 DE-627 ger DE-627 rda eng 550 DE-600 38.52 bkl 57.20 bkl Polgári, Márta verfasserin aut Origin of the Urucum iron formations (Neoproterozoic, Brazil): Textural and mineralogical evidence (Mato Grosso do Sul – Brazil) 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Neoproterozoic banded iron formations (BIF) and ironstones occur in the Urucum mining district (Pantanal, Brazil). Microbially mediated formation as microbialites has been proposed for these deposits. This study aims to provide a high resolution characterization of micro-textural features, mineral assemblage and distribution to gather evidence for two microbial ore forming systems: Fe- and Mn-oxidizing metabolic processes and cyanobacterial activity Optical- and cathodoluminescence rock microscopy, Fourier Transform Infrared (FTIR), and Raman spectroscopy allowed the identification of syngenetic and diagenetic minerals. Evidence from BIF and nodule samples points to low temperature, suboxic, neutral/slightly alkaline formation conditions, but rarely diagenetic acidic and anoxic local conditions occurred. Direct evidence for the action of microorganisms is: (a) microtextural evidence of microbially mediated formation of the ore beds, which occur as microbialites; (b) mineral types of syngenetic origin (ferrihydrite, todorokite, manganite) with various types of organic matter incorporated, (c) light isotope signal (cited negative hematite δ57Fe) and; (d) mineralized sedimentation cycles of Fe, Mn, Ca and Si. Two microbial ore forming systems are proposed as dual systems, characterized by the main Fe- and Mn-oxidizing metabolic processes and intense cyanobacterial activity. More ordered minerals, such as hematite, goethite and anatase, formed during diagenesis of Fe-rich biomat. Calcite-type (calcite, Mn-calcite, rhodochrosite) and dolomite-type carbonate structures (kutnohorite, ankerite, dolomite) occurred. Fine-grained carbonate is the common constituent, with some idiomorphic occurrences and dissemination in the laminae and nodules. The composition of the ankerite and the other carbonates is highly variable. The BIF’s gray laminae consist of hematite-rich part with minor quartz, scarce carbonate and apatite. The red laminae contain high contents of carbonate and hematite, with quartz and further diagenetic minerals (feldspar, apatite). Hematite occurs in considerable amount, but it is enough only for turning jasper reddish in color. Nodules were segregated from laminae by diapirism and/or microbial activity and underwent the same syngenetic and diagenetic changes as the microlayers from which they are segregated. Nodule compositions fit well with the diagenetic trends common in such ore forming systems. Most likely the differences between laminae and nodules are consequences of different initial organic matter contents and fine alternation of the oxygen supply of the system. Urucum (Brazil) Neoproterozoic BIF Microbialite BIF’s syn/early diagenesis Biondi, Joăo Carlos verfasserin aut Gyollai, Ildikó verfasserin aut Fintor, Krisztián verfasserin aut Szabó, Máté verfasserin aut Enthalten in Ore geology reviews Amsterdam [u.a.] : Elsevier, 1986 139 Online-Ressource (DE-627)32461635X (DE-600)2029106-1 (DE-576)259485551 1872-7360 nnns volume:139 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2106 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 38.52 Geologie der Erze 57.20 Exploration und Prospektion von Bodenschätzen AR 139 |
| allfieldsSound |
10.1016/j.oregeorev.2021.104456 doi (DE-627)ELV007035942 (ELSEVIER)S0169-1368(21)00482-0 DE-627 ger DE-627 rda eng 550 DE-600 38.52 bkl 57.20 bkl Polgári, Márta verfasserin aut Origin of the Urucum iron formations (Neoproterozoic, Brazil): Textural and mineralogical evidence (Mato Grosso do Sul – Brazil) 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Neoproterozoic banded iron formations (BIF) and ironstones occur in the Urucum mining district (Pantanal, Brazil). Microbially mediated formation as microbialites has been proposed for these deposits. This study aims to provide a high resolution characterization of micro-textural features, mineral assemblage and distribution to gather evidence for two microbial ore forming systems: Fe- and Mn-oxidizing metabolic processes and cyanobacterial activity Optical- and cathodoluminescence rock microscopy, Fourier Transform Infrared (FTIR), and Raman spectroscopy allowed the identification of syngenetic and diagenetic minerals. Evidence from BIF and nodule samples points to low temperature, suboxic, neutral/slightly alkaline formation conditions, but rarely diagenetic acidic and anoxic local conditions occurred. Direct evidence for the action of microorganisms is: (a) microtextural evidence of microbially mediated formation of the ore beds, which occur as microbialites; (b) mineral types of syngenetic origin (ferrihydrite, todorokite, manganite) with various types of organic matter incorporated, (c) light isotope signal (cited negative hematite δ57Fe) and; (d) mineralized sedimentation cycles of Fe, Mn, Ca and Si. Two microbial ore forming systems are proposed as dual systems, characterized by the main Fe- and Mn-oxidizing metabolic processes and intense cyanobacterial activity. More ordered minerals, such as hematite, goethite and anatase, formed during diagenesis of Fe-rich biomat. Calcite-type (calcite, Mn-calcite, rhodochrosite) and dolomite-type carbonate structures (kutnohorite, ankerite, dolomite) occurred. Fine-grained carbonate is the common constituent, with some idiomorphic occurrences and dissemination in the laminae and nodules. The composition of the ankerite and the other carbonates is highly variable. The BIF’s gray laminae consist of hematite-rich part with minor quartz, scarce carbonate and apatite. The red laminae contain high contents of carbonate and hematite, with quartz and further diagenetic minerals (feldspar, apatite). Hematite occurs in considerable amount, but it is enough only for turning jasper reddish in color. Nodules were segregated from laminae by diapirism and/or microbial activity and underwent the same syngenetic and diagenetic changes as the microlayers from which they are segregated. Nodule compositions fit well with the diagenetic trends common in such ore forming systems. Most likely the differences between laminae and nodules are consequences of different initial organic matter contents and fine alternation of the oxygen supply of the system. Urucum (Brazil) Neoproterozoic BIF Microbialite BIF’s syn/early diagenesis Biondi, Joăo Carlos verfasserin aut Gyollai, Ildikó verfasserin aut Fintor, Krisztián verfasserin aut Szabó, Máté verfasserin aut Enthalten in Ore geology reviews Amsterdam [u.a.] : Elsevier, 1986 139 Online-Ressource (DE-627)32461635X (DE-600)2029106-1 (DE-576)259485551 1872-7360 nnns volume:139 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2106 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 38.52 Geologie der Erze 57.20 Exploration und Prospektion von Bodenschätzen AR 139 |
| language |
English |
| source |
Enthalten in Ore geology reviews 139 volume:139 |
| sourceStr |
Enthalten in Ore geology reviews 139 volume:139 |
| format_phy_str_mv |
Article |
| bklname |
Geologie der Erze Exploration und Prospektion von Bodenschätzen |
| institution |
findex.gbv.de |
| topic_facet |
Urucum (Brazil) Neoproterozoic BIF Microbialite BIF’s syn/early diagenesis |
| dewey-raw |
550 |
| isfreeaccess_bool |
false |
| container_title |
Ore geology reviews |
| authorswithroles_txt_mv |
Polgári, Márta @@aut@@ Biondi, Joăo Carlos @@aut@@ Gyollai, Ildikó @@aut@@ Fintor, Krisztián @@aut@@ Szabó, Máté @@aut@@ |
| publishDateDaySort_date |
2021-01-01T00:00:00Z |
| hierarchy_top_id |
32461635X |
| dewey-sort |
3550 |
| id |
ELV007035942 |
| language_de |
englisch |
| fullrecord |
<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">ELV007035942</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20230524132602.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">230506s2021 xx |||||o 00| ||eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1016/j.oregeorev.2021.104456</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)ELV007035942</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(ELSEVIER)S0169-1368(21)00482-0</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rda</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="082" ind1="0" ind2="4"><subfield code="a">550</subfield><subfield code="q">DE-600</subfield></datafield><datafield tag="084" ind1=" " ind2=" "><subfield code="a">38.52</subfield><subfield code="2">bkl</subfield></datafield><datafield tag="084" ind1=" " ind2=" "><subfield code="a">57.20</subfield><subfield code="2">bkl</subfield></datafield><datafield tag="100" ind1="1" ind2=" "><subfield code="a">Polgári, Márta</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Origin of the Urucum iron formations (Neoproterozoic, Brazil): Textural and mineralogical evidence (Mato Grosso do Sul – Brazil)</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2021</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">zzz</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Neoproterozoic banded iron formations (BIF) and ironstones occur in the Urucum mining district (Pantanal, Brazil). Microbially mediated formation as microbialites has been proposed for these deposits. This study aims to provide a high resolution characterization of micro-textural features, mineral assemblage and distribution to gather evidence for two microbial ore forming systems: Fe- and Mn-oxidizing metabolic processes and cyanobacterial activity Optical- and cathodoluminescence rock microscopy, Fourier Transform Infrared (FTIR), and Raman spectroscopy allowed the identification of syngenetic and diagenetic minerals. Evidence from BIF and nodule samples points to low temperature, suboxic, neutral/slightly alkaline formation conditions, but rarely diagenetic acidic and anoxic local conditions occurred. Direct evidence for the action of microorganisms is: (a) microtextural evidence of microbially mediated formation of the ore beds, which occur as microbialites; (b) mineral types of syngenetic origin (ferrihydrite, todorokite, manganite) with various types of organic matter incorporated, (c) light isotope signal (cited negative hematite δ57Fe) and; (d) mineralized sedimentation cycles of Fe, Mn, Ca and Si. Two microbial ore forming systems are proposed as dual systems, characterized by the main Fe- and Mn-oxidizing metabolic processes and intense cyanobacterial activity. More ordered minerals, such as hematite, goethite and anatase, formed during diagenesis of Fe-rich biomat. Calcite-type (calcite, Mn-calcite, rhodochrosite) and dolomite-type carbonate structures (kutnohorite, ankerite, dolomite) occurred. Fine-grained carbonate is the common constituent, with some idiomorphic occurrences and dissemination in the laminae and nodules. The composition of the ankerite and the other carbonates is highly variable. The BIF’s gray laminae consist of hematite-rich part with minor quartz, scarce carbonate and apatite. The red laminae contain high contents of carbonate and hematite, with quartz and further diagenetic minerals (feldspar, apatite). Hematite occurs in considerable amount, but it is enough only for turning jasper reddish in color. Nodules were segregated from laminae by diapirism and/or microbial activity and underwent the same syngenetic and diagenetic changes as the microlayers from which they are segregated. Nodule compositions fit well with the diagenetic trends common in such ore forming systems. Most likely the differences between laminae and nodules are consequences of different initial organic matter contents and fine alternation of the oxygen supply of the system.</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Urucum (Brazil)</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Neoproterozoic BIF</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Microbialite</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">BIF’s syn/early diagenesis</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Biondi, Joăo Carlos</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Gyollai, Ildikó</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Fintor, Krisztián</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Szabó, Máté</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="t">Ore geology reviews</subfield><subfield code="d">Amsterdam [u.a.] : Elsevier, 1986</subfield><subfield code="g">139</subfield><subfield code="h">Online-Ressource</subfield><subfield code="w">(DE-627)32461635X</subfield><subfield code="w">(DE-600)2029106-1</subfield><subfield code="w">(DE-576)259485551</subfield><subfield code="x">1872-7360</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:139</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_U</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SYSFLAG_U</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ELV</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OPC-GGO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OPC-GEO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_20</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_22</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_23</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_24</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_31</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_32</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_40</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_60</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_62</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_63</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_65</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_69</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_70</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_73</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_74</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_90</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_95</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_100</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_105</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_110</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_150</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_151</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_187</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_213</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_224</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_230</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_370</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_602</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_702</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2003</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2004</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2005</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2007</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2008</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2009</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2011</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2014</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2015</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2020</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2021</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2025</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2027</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2034</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2038</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2044</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2048</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2049</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2050</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2056</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2059</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2061</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2064</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2065</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2068</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2106</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2111</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2112</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2113</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2118</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2122</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2129</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2143</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2147</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2148</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2152</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2153</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2190</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2232</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2336</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2470</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2507</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2522</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4035</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4037</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4112</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4125</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4126</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4242</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4251</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4305</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4313</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4322</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4323</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4324</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4325</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4326</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4333</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4334</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4335</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4338</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4393</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4700</subfield></datafield><datafield tag="936" ind1="b" ind2="k"><subfield code="a">38.52</subfield><subfield code="j">Geologie der Erze</subfield></datafield><datafield tag="936" ind1="b" ind2="k"><subfield code="a">57.20</subfield><subfield code="j">Exploration und Prospektion von Bodenschätzen</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">139</subfield></datafield></record></collection>
|
| author |
Polgári, Márta |
| spellingShingle |
Polgári, Márta ddc 550 bkl 38.52 bkl 57.20 misc Urucum (Brazil) misc Neoproterozoic BIF misc Microbialite misc BIF’s syn/early diagenesis Origin of the Urucum iron formations (Neoproterozoic, Brazil): Textural and mineralogical evidence (Mato Grosso do Sul – Brazil) |
| authorStr |
Polgári, Márta |
| ppnlink_with_tag_str_mv |
@@773@@(DE-627)32461635X |
| format |
electronic Article |
| dewey-ones |
550 - Earth sciences |
| delete_txt_mv |
keep |
| author_role |
aut aut aut aut aut |
| collection |
elsevier |
| remote_str |
true |
| illustrated |
Not Illustrated |
| issn |
1872-7360 |
| topic_title |
550 DE-600 38.52 bkl 57.20 bkl Origin of the Urucum iron formations (Neoproterozoic, Brazil): Textural and mineralogical evidence (Mato Grosso do Sul – Brazil) Urucum (Brazil) Neoproterozoic BIF Microbialite BIF’s syn/early diagenesis |
| topic |
ddc 550 bkl 38.52 bkl 57.20 misc Urucum (Brazil) misc Neoproterozoic BIF misc Microbialite misc BIF’s syn/early diagenesis |
| topic_unstemmed |
ddc 550 bkl 38.52 bkl 57.20 misc Urucum (Brazil) misc Neoproterozoic BIF misc Microbialite misc BIF’s syn/early diagenesis |
| topic_browse |
ddc 550 bkl 38.52 bkl 57.20 misc Urucum (Brazil) misc Neoproterozoic BIF misc Microbialite misc BIF’s syn/early diagenesis |
| format_facet |
Elektronische Aufsätze Aufsätze Elektronische Ressource |
| format_main_str_mv |
Text Zeitschrift/Artikel |
| carriertype_str_mv |
cr |
| hierarchy_parent_title |
Ore geology reviews |
| hierarchy_parent_id |
32461635X |
| dewey-tens |
550 - Earth sciences & geology |
| hierarchy_top_title |
Ore geology reviews |
| isfreeaccess_txt |
false |
| familylinks_str_mv |
(DE-627)32461635X (DE-600)2029106-1 (DE-576)259485551 |
| title |
Origin of the Urucum iron formations (Neoproterozoic, Brazil): Textural and mineralogical evidence (Mato Grosso do Sul – Brazil) |
| ctrlnum |
(DE-627)ELV007035942 (ELSEVIER)S0169-1368(21)00482-0 |
| title_full |
Origin of the Urucum iron formations (Neoproterozoic, Brazil): Textural and mineralogical evidence (Mato Grosso do Sul – Brazil) |
| author_sort |
Polgári, Márta |
| journal |
Ore geology reviews |
| journalStr |
Ore geology reviews |
| lang_code |
eng |
| isOA_bool |
false |
| dewey-hundreds |
500 - Science |
| recordtype |
marc |
| publishDateSort |
2021 |
| contenttype_str_mv |
zzz |
| author_browse |
Polgári, Márta Biondi, Joăo Carlos Gyollai, Ildikó Fintor, Krisztián Szabó, Máté |
| container_volume |
139 |
| class |
550 DE-600 38.52 bkl 57.20 bkl |
| format_se |
Elektronische Aufsätze |
| author-letter |
Polgári, Márta |
| doi_str_mv |
10.1016/j.oregeorev.2021.104456 |
| dewey-full |
550 |
| author2-role |
verfasserin |
| title_sort |
origin of the urucum iron formations (neoproterozoic, brazil): textural and mineralogical evidence (mato grosso do sul – brazil) |
| title_auth |
Origin of the Urucum iron formations (Neoproterozoic, Brazil): Textural and mineralogical evidence (Mato Grosso do Sul – Brazil) |
| abstract |
Neoproterozoic banded iron formations (BIF) and ironstones occur in the Urucum mining district (Pantanal, Brazil). Microbially mediated formation as microbialites has been proposed for these deposits. This study aims to provide a high resolution characterization of micro-textural features, mineral assemblage and distribution to gather evidence for two microbial ore forming systems: Fe- and Mn-oxidizing metabolic processes and cyanobacterial activity Optical- and cathodoluminescence rock microscopy, Fourier Transform Infrared (FTIR), and Raman spectroscopy allowed the identification of syngenetic and diagenetic minerals. Evidence from BIF and nodule samples points to low temperature, suboxic, neutral/slightly alkaline formation conditions, but rarely diagenetic acidic and anoxic local conditions occurred. Direct evidence for the action of microorganisms is: (a) microtextural evidence of microbially mediated formation of the ore beds, which occur as microbialites; (b) mineral types of syngenetic origin (ferrihydrite, todorokite, manganite) with various types of organic matter incorporated, (c) light isotope signal (cited negative hematite δ57Fe) and; (d) mineralized sedimentation cycles of Fe, Mn, Ca and Si. Two microbial ore forming systems are proposed as dual systems, characterized by the main Fe- and Mn-oxidizing metabolic processes and intense cyanobacterial activity. More ordered minerals, such as hematite, goethite and anatase, formed during diagenesis of Fe-rich biomat. Calcite-type (calcite, Mn-calcite, rhodochrosite) and dolomite-type carbonate structures (kutnohorite, ankerite, dolomite) occurred. Fine-grained carbonate is the common constituent, with some idiomorphic occurrences and dissemination in the laminae and nodules. The composition of the ankerite and the other carbonates is highly variable. The BIF’s gray laminae consist of hematite-rich part with minor quartz, scarce carbonate and apatite. The red laminae contain high contents of carbonate and hematite, with quartz and further diagenetic minerals (feldspar, apatite). Hematite occurs in considerable amount, but it is enough only for turning jasper reddish in color. Nodules were segregated from laminae by diapirism and/or microbial activity and underwent the same syngenetic and diagenetic changes as the microlayers from which they are segregated. Nodule compositions fit well with the diagenetic trends common in such ore forming systems. Most likely the differences between laminae and nodules are consequences of different initial organic matter contents and fine alternation of the oxygen supply of the system. |
| abstractGer |
Neoproterozoic banded iron formations (BIF) and ironstones occur in the Urucum mining district (Pantanal, Brazil). Microbially mediated formation as microbialites has been proposed for these deposits. This study aims to provide a high resolution characterization of micro-textural features, mineral assemblage and distribution to gather evidence for two microbial ore forming systems: Fe- and Mn-oxidizing metabolic processes and cyanobacterial activity Optical- and cathodoluminescence rock microscopy, Fourier Transform Infrared (FTIR), and Raman spectroscopy allowed the identification of syngenetic and diagenetic minerals. Evidence from BIF and nodule samples points to low temperature, suboxic, neutral/slightly alkaline formation conditions, but rarely diagenetic acidic and anoxic local conditions occurred. Direct evidence for the action of microorganisms is: (a) microtextural evidence of microbially mediated formation of the ore beds, which occur as microbialites; (b) mineral types of syngenetic origin (ferrihydrite, todorokite, manganite) with various types of organic matter incorporated, (c) light isotope signal (cited negative hematite δ57Fe) and; (d) mineralized sedimentation cycles of Fe, Mn, Ca and Si. Two microbial ore forming systems are proposed as dual systems, characterized by the main Fe- and Mn-oxidizing metabolic processes and intense cyanobacterial activity. More ordered minerals, such as hematite, goethite and anatase, formed during diagenesis of Fe-rich biomat. Calcite-type (calcite, Mn-calcite, rhodochrosite) and dolomite-type carbonate structures (kutnohorite, ankerite, dolomite) occurred. Fine-grained carbonate is the common constituent, with some idiomorphic occurrences and dissemination in the laminae and nodules. The composition of the ankerite and the other carbonates is highly variable. The BIF’s gray laminae consist of hematite-rich part with minor quartz, scarce carbonate and apatite. The red laminae contain high contents of carbonate and hematite, with quartz and further diagenetic minerals (feldspar, apatite). Hematite occurs in considerable amount, but it is enough only for turning jasper reddish in color. Nodules were segregated from laminae by diapirism and/or microbial activity and underwent the same syngenetic and diagenetic changes as the microlayers from which they are segregated. Nodule compositions fit well with the diagenetic trends common in such ore forming systems. Most likely the differences between laminae and nodules are consequences of different initial organic matter contents and fine alternation of the oxygen supply of the system. |
| abstract_unstemmed |
Neoproterozoic banded iron formations (BIF) and ironstones occur in the Urucum mining district (Pantanal, Brazil). Microbially mediated formation as microbialites has been proposed for these deposits. This study aims to provide a high resolution characterization of micro-textural features, mineral assemblage and distribution to gather evidence for two microbial ore forming systems: Fe- and Mn-oxidizing metabolic processes and cyanobacterial activity Optical- and cathodoluminescence rock microscopy, Fourier Transform Infrared (FTIR), and Raman spectroscopy allowed the identification of syngenetic and diagenetic minerals. Evidence from BIF and nodule samples points to low temperature, suboxic, neutral/slightly alkaline formation conditions, but rarely diagenetic acidic and anoxic local conditions occurred. Direct evidence for the action of microorganisms is: (a) microtextural evidence of microbially mediated formation of the ore beds, which occur as microbialites; (b) mineral types of syngenetic origin (ferrihydrite, todorokite, manganite) with various types of organic matter incorporated, (c) light isotope signal (cited negative hematite δ57Fe) and; (d) mineralized sedimentation cycles of Fe, Mn, Ca and Si. Two microbial ore forming systems are proposed as dual systems, characterized by the main Fe- and Mn-oxidizing metabolic processes and intense cyanobacterial activity. More ordered minerals, such as hematite, goethite and anatase, formed during diagenesis of Fe-rich biomat. Calcite-type (calcite, Mn-calcite, rhodochrosite) and dolomite-type carbonate structures (kutnohorite, ankerite, dolomite) occurred. Fine-grained carbonate is the common constituent, with some idiomorphic occurrences and dissemination in the laminae and nodules. The composition of the ankerite and the other carbonates is highly variable. The BIF’s gray laminae consist of hematite-rich part with minor quartz, scarce carbonate and apatite. The red laminae contain high contents of carbonate and hematite, with quartz and further diagenetic minerals (feldspar, apatite). Hematite occurs in considerable amount, but it is enough only for turning jasper reddish in color. Nodules were segregated from laminae by diapirism and/or microbial activity and underwent the same syngenetic and diagenetic changes as the microlayers from which they are segregated. Nodule compositions fit well with the diagenetic trends common in such ore forming systems. Most likely the differences between laminae and nodules are consequences of different initial organic matter contents and fine alternation of the oxygen supply of the system. |
| collection_details |
GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2106 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 |
| title_short |
Origin of the Urucum iron formations (Neoproterozoic, Brazil): Textural and mineralogical evidence (Mato Grosso do Sul – Brazil) |
| remote_bool |
true |
| author2 |
Biondi, Joăo Carlos Gyollai, Ildikó Fintor, Krisztián Szabó, Máté |
| author2Str |
Biondi, Joăo Carlos Gyollai, Ildikó Fintor, Krisztián Szabó, Máté |
| ppnlink |
32461635X |
| mediatype_str_mv |
c |
| isOA_txt |
false |
| hochschulschrift_bool |
false |
| doi_str |
10.1016/j.oregeorev.2021.104456 |
| up_date |
2024-07-06T23:24:01.012Z |
| _version_ |
1803873934129496064 |
| fullrecord_marcxml |
<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">ELV007035942</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20230524132602.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">230506s2021 xx |||||o 00| ||eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1016/j.oregeorev.2021.104456</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)ELV007035942</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(ELSEVIER)S0169-1368(21)00482-0</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rda</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="082" ind1="0" ind2="4"><subfield code="a">550</subfield><subfield code="q">DE-600</subfield></datafield><datafield tag="084" ind1=" " ind2=" "><subfield code="a">38.52</subfield><subfield code="2">bkl</subfield></datafield><datafield tag="084" ind1=" " ind2=" "><subfield code="a">57.20</subfield><subfield code="2">bkl</subfield></datafield><datafield tag="100" ind1="1" ind2=" "><subfield code="a">Polgári, Márta</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Origin of the Urucum iron formations (Neoproterozoic, Brazil): Textural and mineralogical evidence (Mato Grosso do Sul – Brazil)</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2021</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">zzz</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Neoproterozoic banded iron formations (BIF) and ironstones occur in the Urucum mining district (Pantanal, Brazil). Microbially mediated formation as microbialites has been proposed for these deposits. This study aims to provide a high resolution characterization of micro-textural features, mineral assemblage and distribution to gather evidence for two microbial ore forming systems: Fe- and Mn-oxidizing metabolic processes and cyanobacterial activity Optical- and cathodoluminescence rock microscopy, Fourier Transform Infrared (FTIR), and Raman spectroscopy allowed the identification of syngenetic and diagenetic minerals. Evidence from BIF and nodule samples points to low temperature, suboxic, neutral/slightly alkaline formation conditions, but rarely diagenetic acidic and anoxic local conditions occurred. Direct evidence for the action of microorganisms is: (a) microtextural evidence of microbially mediated formation of the ore beds, which occur as microbialites; (b) mineral types of syngenetic origin (ferrihydrite, todorokite, manganite) with various types of organic matter incorporated, (c) light isotope signal (cited negative hematite δ57Fe) and; (d) mineralized sedimentation cycles of Fe, Mn, Ca and Si. Two microbial ore forming systems are proposed as dual systems, characterized by the main Fe- and Mn-oxidizing metabolic processes and intense cyanobacterial activity. More ordered minerals, such as hematite, goethite and anatase, formed during diagenesis of Fe-rich biomat. Calcite-type (calcite, Mn-calcite, rhodochrosite) and dolomite-type carbonate structures (kutnohorite, ankerite, dolomite) occurred. Fine-grained carbonate is the common constituent, with some idiomorphic occurrences and dissemination in the laminae and nodules. The composition of the ankerite and the other carbonates is highly variable. The BIF’s gray laminae consist of hematite-rich part with minor quartz, scarce carbonate and apatite. The red laminae contain high contents of carbonate and hematite, with quartz and further diagenetic minerals (feldspar, apatite). Hematite occurs in considerable amount, but it is enough only for turning jasper reddish in color. Nodules were segregated from laminae by diapirism and/or microbial activity and underwent the same syngenetic and diagenetic changes as the microlayers from which they are segregated. Nodule compositions fit well with the diagenetic trends common in such ore forming systems. Most likely the differences between laminae and nodules are consequences of different initial organic matter contents and fine alternation of the oxygen supply of the system.</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Urucum (Brazil)</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Neoproterozoic BIF</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Microbialite</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">BIF’s syn/early diagenesis</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Biondi, Joăo Carlos</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Gyollai, Ildikó</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Fintor, Krisztián</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Szabó, Máté</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="t">Ore geology reviews</subfield><subfield code="d">Amsterdam [u.a.] : Elsevier, 1986</subfield><subfield code="g">139</subfield><subfield code="h">Online-Ressource</subfield><subfield code="w">(DE-627)32461635X</subfield><subfield code="w">(DE-600)2029106-1</subfield><subfield code="w">(DE-576)259485551</subfield><subfield code="x">1872-7360</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:139</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_U</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SYSFLAG_U</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ELV</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OPC-GGO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OPC-GEO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_20</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_22</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_23</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_24</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_31</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_32</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_40</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_60</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_62</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_63</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_65</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_69</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_70</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_73</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_74</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_90</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_95</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_100</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_105</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_110</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_150</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_151</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_187</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_213</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_224</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_230</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_370</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_602</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_702</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2003</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2004</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2005</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2007</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2008</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2009</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2011</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2014</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2015</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2020</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2021</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2025</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2027</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2034</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2038</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2044</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2048</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2049</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2050</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2056</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2059</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2061</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2064</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2065</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2068</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2106</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2111</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2112</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2113</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2118</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2122</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2129</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2143</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2147</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2148</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2152</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2153</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2190</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2232</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2336</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2470</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2507</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2522</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4035</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4037</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4112</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4125</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4126</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4242</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4251</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4305</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4313</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4322</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4323</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4324</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4325</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4326</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4333</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4334</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4335</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4338</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4393</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4700</subfield></datafield><datafield tag="936" ind1="b" ind2="k"><subfield code="a">38.52</subfield><subfield code="j">Geologie der Erze</subfield></datafield><datafield tag="936" ind1="b" ind2="k"><subfield code="a">57.20</subfield><subfield code="j">Exploration und Prospektion von Bodenschätzen</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">139</subfield></datafield></record></collection>
|
| score |
7.399705 |