Genesis of hydrothermal silver-antimony-sulfide veins of the Bräunsdorf sector as part of the classic Freiberg silver mining district, Germany
Abstract The peripheral regions of the Freiberg vein-type silver mining district comprise several sub-districts of which Bräunsdorf was among the richest in terms of Ag grade. Historically, 114 t (about 3.9 million ounces) of Ag were produced from the Neue Hoffnung Gottes mine near Bräunsdorf. The N...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Burisch, Mathias [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2018 |
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| Schlagwörter: |
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| Anmerkung: |
© Springer-Verlag GmbH Germany, part of Springer Nature 2018 |
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| Übergeordnetes Werk: |
Enthalten in: Mineralium deposita - Berlin : Springer, 1966, 54(2018), 2 vom: 05. Okt., Seite 263-280 |
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| Übergeordnetes Werk: |
volume:54 ; year:2018 ; number:2 ; day:05 ; month:10 ; pages:263-280 |
| Links: |
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| DOI / URN: |
10.1007/s00126-018-0842-0 |
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| Katalog-ID: |
SPR001033956 |
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| 520 | |a Abstract The peripheral regions of the Freiberg vein-type silver mining district comprise several sub-districts of which Bräunsdorf was among the richest in terms of Ag grade. Historically, 114 t (about 3.9 million ounces) of Ag were produced from the Neue Hoffnung Gottes mine near Bräunsdorf. The Neuer Segen Gottes Stehender is a sigmoidally shaped NNE-SSW trending vein, which varies significantly in thickness (0.05 to 3 m) and extends over about 2.6 km strike length at the surface. The vein infill is marked by a Pb-Zn-Cu-Fe-sulfide-quartz (stage 1) and an abundant Ag-Sb-sulfide/sulfosalt-quartz ± carbonate assemblage (stage 2). To develop a sound genetic understanding of the polymetallic mineralisation in the Bräunsdorf sub-district, we conducted detailed textural analyses of ore and gangue minerals, fluid inclusion analyses, electron microprobe analyses and thermodynamic computations in order to characterise the ore fluids and ore-forming processes. The early-stage Pb-Zn-Cu-Fe-sulfide mineralisation (stage 1) is related to fluids with low salinities (0.5–4% eq. w(NaCl)) and formed at temperatures ≥ 300 °C. Microthermometric data related to the Ag-Sb-sulfide/sulfosalt assemblage (stage 2) show similar salinites compared to ore stage 1, but have significantly lower homogenisation temperatures in the range of 180–280 °C. Based on fluid inclusion data, cooling can be regarded as the major ore-forming process. Reaction path model calculations for cooling of fluids with different initial pH values (4, 5.5 and 7) reproduce the observed mineral assemblages very well and predict spatial zonation of the Ag-Sb- and Sb-sulfide minerals that are in excellent agreement with field observations. We conclude that Ag-rich zones may well occur below Sb-rich zones in hydrothermal vein-type systems similar to those of the Freiberg district. This relationship may be of potential use for exploration targeting. | ||
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10.1007/s00126-018-0842-0 doi (DE-627)SPR001033956 (SPR)s00126-018-0842-0-e DE-627 ger DE-627 rakwb eng Burisch, Mathias verfasserin (orcid)0000-0001-5574-2210 aut Genesis of hydrothermal silver-antimony-sulfide veins of the Bräunsdorf sector as part of the classic Freiberg silver mining district, Germany 2018 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Springer-Verlag GmbH Germany, part of Springer Nature 2018 Abstract The peripheral regions of the Freiberg vein-type silver mining district comprise several sub-districts of which Bräunsdorf was among the richest in terms of Ag grade. Historically, 114 t (about 3.9 million ounces) of Ag were produced from the Neue Hoffnung Gottes mine near Bräunsdorf. The Neuer Segen Gottes Stehender is a sigmoidally shaped NNE-SSW trending vein, which varies significantly in thickness (0.05 to 3 m) and extends over about 2.6 km strike length at the surface. The vein infill is marked by a Pb-Zn-Cu-Fe-sulfide-quartz (stage 1) and an abundant Ag-Sb-sulfide/sulfosalt-quartz ± carbonate assemblage (stage 2). To develop a sound genetic understanding of the polymetallic mineralisation in the Bräunsdorf sub-district, we conducted detailed textural analyses of ore and gangue minerals, fluid inclusion analyses, electron microprobe analyses and thermodynamic computations in order to characterise the ore fluids and ore-forming processes. The early-stage Pb-Zn-Cu-Fe-sulfide mineralisation (stage 1) is related to fluids with low salinities (0.5–4% eq. w(NaCl)) and formed at temperatures ≥ 300 °C. Microthermometric data related to the Ag-Sb-sulfide/sulfosalt assemblage (stage 2) show similar salinites compared to ore stage 1, but have significantly lower homogenisation temperatures in the range of 180–280 °C. Based on fluid inclusion data, cooling can be regarded as the major ore-forming process. Reaction path model calculations for cooling of fluids with different initial pH values (4, 5.5 and 7) reproduce the observed mineral assemblages very well and predict spatial zonation of the Ag-Sb- and Sb-sulfide minerals that are in excellent agreement with field observations. We conclude that Ag-rich zones may well occur below Sb-rich zones in hydrothermal vein-type systems similar to those of the Freiberg district. This relationship may be of potential use for exploration targeting. Stibnite (dpeaa)DE-He213 Tennantite-tetrahedrite (dpeaa)DE-He213 Fluid inclusions (dpeaa)DE-He213 Reaction path modelling (dpeaa)DE-He213 Epithermal system (dpeaa)DE-He213 Hartmann, Anthea aut Bach, Wolfgang aut Krolop, Patrick aut Krause, Joachim aut Gutzmer, Jens aut Enthalten in Mineralium deposita Berlin : Springer, 1966 54(2018), 2 vom: 05. Okt., Seite 263-280 (DE-627)254630014 (DE-600)1462046-7 1432-1866 nnns volume:54 year:2018 number:2 day:05 month:10 pages:263-280 https://dx.doi.org/10.1007/s00126-018-0842-0 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 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_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_381 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 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_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 54 2018 2 05 10 263-280 |
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10.1007/s00126-018-0842-0 doi (DE-627)SPR001033956 (SPR)s00126-018-0842-0-e DE-627 ger DE-627 rakwb eng Burisch, Mathias verfasserin (orcid)0000-0001-5574-2210 aut Genesis of hydrothermal silver-antimony-sulfide veins of the Bräunsdorf sector as part of the classic Freiberg silver mining district, Germany 2018 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Springer-Verlag GmbH Germany, part of Springer Nature 2018 Abstract The peripheral regions of the Freiberg vein-type silver mining district comprise several sub-districts of which Bräunsdorf was among the richest in terms of Ag grade. Historically, 114 t (about 3.9 million ounces) of Ag were produced from the Neue Hoffnung Gottes mine near Bräunsdorf. The Neuer Segen Gottes Stehender is a sigmoidally shaped NNE-SSW trending vein, which varies significantly in thickness (0.05 to 3 m) and extends over about 2.6 km strike length at the surface. The vein infill is marked by a Pb-Zn-Cu-Fe-sulfide-quartz (stage 1) and an abundant Ag-Sb-sulfide/sulfosalt-quartz ± carbonate assemblage (stage 2). To develop a sound genetic understanding of the polymetallic mineralisation in the Bräunsdorf sub-district, we conducted detailed textural analyses of ore and gangue minerals, fluid inclusion analyses, electron microprobe analyses and thermodynamic computations in order to characterise the ore fluids and ore-forming processes. The early-stage Pb-Zn-Cu-Fe-sulfide mineralisation (stage 1) is related to fluids with low salinities (0.5–4% eq. w(NaCl)) and formed at temperatures ≥ 300 °C. Microthermometric data related to the Ag-Sb-sulfide/sulfosalt assemblage (stage 2) show similar salinites compared to ore stage 1, but have significantly lower homogenisation temperatures in the range of 180–280 °C. Based on fluid inclusion data, cooling can be regarded as the major ore-forming process. Reaction path model calculations for cooling of fluids with different initial pH values (4, 5.5 and 7) reproduce the observed mineral assemblages very well and predict spatial zonation of the Ag-Sb- and Sb-sulfide minerals that are in excellent agreement with field observations. We conclude that Ag-rich zones may well occur below Sb-rich zones in hydrothermal vein-type systems similar to those of the Freiberg district. This relationship may be of potential use for exploration targeting. Stibnite (dpeaa)DE-He213 Tennantite-tetrahedrite (dpeaa)DE-He213 Fluid inclusions (dpeaa)DE-He213 Reaction path modelling (dpeaa)DE-He213 Epithermal system (dpeaa)DE-He213 Hartmann, Anthea aut Bach, Wolfgang aut Krolop, Patrick aut Krause, Joachim aut Gutzmer, Jens aut Enthalten in Mineralium deposita Berlin : Springer, 1966 54(2018), 2 vom: 05. Okt., Seite 263-280 (DE-627)254630014 (DE-600)1462046-7 1432-1866 nnns volume:54 year:2018 number:2 day:05 month:10 pages:263-280 https://dx.doi.org/10.1007/s00126-018-0842-0 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 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_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_381 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 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_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 54 2018 2 05 10 263-280 |
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10.1007/s00126-018-0842-0 doi (DE-627)SPR001033956 (SPR)s00126-018-0842-0-e DE-627 ger DE-627 rakwb eng Burisch, Mathias verfasserin (orcid)0000-0001-5574-2210 aut Genesis of hydrothermal silver-antimony-sulfide veins of the Bräunsdorf sector as part of the classic Freiberg silver mining district, Germany 2018 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Springer-Verlag GmbH Germany, part of Springer Nature 2018 Abstract The peripheral regions of the Freiberg vein-type silver mining district comprise several sub-districts of which Bräunsdorf was among the richest in terms of Ag grade. Historically, 114 t (about 3.9 million ounces) of Ag were produced from the Neue Hoffnung Gottes mine near Bräunsdorf. The Neuer Segen Gottes Stehender is a sigmoidally shaped NNE-SSW trending vein, which varies significantly in thickness (0.05 to 3 m) and extends over about 2.6 km strike length at the surface. The vein infill is marked by a Pb-Zn-Cu-Fe-sulfide-quartz (stage 1) and an abundant Ag-Sb-sulfide/sulfosalt-quartz ± carbonate assemblage (stage 2). To develop a sound genetic understanding of the polymetallic mineralisation in the Bräunsdorf sub-district, we conducted detailed textural analyses of ore and gangue minerals, fluid inclusion analyses, electron microprobe analyses and thermodynamic computations in order to characterise the ore fluids and ore-forming processes. The early-stage Pb-Zn-Cu-Fe-sulfide mineralisation (stage 1) is related to fluids with low salinities (0.5–4% eq. w(NaCl)) and formed at temperatures ≥ 300 °C. Microthermometric data related to the Ag-Sb-sulfide/sulfosalt assemblage (stage 2) show similar salinites compared to ore stage 1, but have significantly lower homogenisation temperatures in the range of 180–280 °C. Based on fluid inclusion data, cooling can be regarded as the major ore-forming process. Reaction path model calculations for cooling of fluids with different initial pH values (4, 5.5 and 7) reproduce the observed mineral assemblages very well and predict spatial zonation of the Ag-Sb- and Sb-sulfide minerals that are in excellent agreement with field observations. We conclude that Ag-rich zones may well occur below Sb-rich zones in hydrothermal vein-type systems similar to those of the Freiberg district. This relationship may be of potential use for exploration targeting. Stibnite (dpeaa)DE-He213 Tennantite-tetrahedrite (dpeaa)DE-He213 Fluid inclusions (dpeaa)DE-He213 Reaction path modelling (dpeaa)DE-He213 Epithermal system (dpeaa)DE-He213 Hartmann, Anthea aut Bach, Wolfgang aut Krolop, Patrick aut Krause, Joachim aut Gutzmer, Jens aut Enthalten in Mineralium deposita Berlin : Springer, 1966 54(2018), 2 vom: 05. Okt., Seite 263-280 (DE-627)254630014 (DE-600)1462046-7 1432-1866 nnns volume:54 year:2018 number:2 day:05 month:10 pages:263-280 https://dx.doi.org/10.1007/s00126-018-0842-0 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 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_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_381 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 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_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 54 2018 2 05 10 263-280 |
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10.1007/s00126-018-0842-0 doi (DE-627)SPR001033956 (SPR)s00126-018-0842-0-e DE-627 ger DE-627 rakwb eng Burisch, Mathias verfasserin (orcid)0000-0001-5574-2210 aut Genesis of hydrothermal silver-antimony-sulfide veins of the Bräunsdorf sector as part of the classic Freiberg silver mining district, Germany 2018 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Springer-Verlag GmbH Germany, part of Springer Nature 2018 Abstract The peripheral regions of the Freiberg vein-type silver mining district comprise several sub-districts of which Bräunsdorf was among the richest in terms of Ag grade. Historically, 114 t (about 3.9 million ounces) of Ag were produced from the Neue Hoffnung Gottes mine near Bräunsdorf. The Neuer Segen Gottes Stehender is a sigmoidally shaped NNE-SSW trending vein, which varies significantly in thickness (0.05 to 3 m) and extends over about 2.6 km strike length at the surface. The vein infill is marked by a Pb-Zn-Cu-Fe-sulfide-quartz (stage 1) and an abundant Ag-Sb-sulfide/sulfosalt-quartz ± carbonate assemblage (stage 2). To develop a sound genetic understanding of the polymetallic mineralisation in the Bräunsdorf sub-district, we conducted detailed textural analyses of ore and gangue minerals, fluid inclusion analyses, electron microprobe analyses and thermodynamic computations in order to characterise the ore fluids and ore-forming processes. The early-stage Pb-Zn-Cu-Fe-sulfide mineralisation (stage 1) is related to fluids with low salinities (0.5–4% eq. w(NaCl)) and formed at temperatures ≥ 300 °C. Microthermometric data related to the Ag-Sb-sulfide/sulfosalt assemblage (stage 2) show similar salinites compared to ore stage 1, but have significantly lower homogenisation temperatures in the range of 180–280 °C. Based on fluid inclusion data, cooling can be regarded as the major ore-forming process. Reaction path model calculations for cooling of fluids with different initial pH values (4, 5.5 and 7) reproduce the observed mineral assemblages very well and predict spatial zonation of the Ag-Sb- and Sb-sulfide minerals that are in excellent agreement with field observations. We conclude that Ag-rich zones may well occur below Sb-rich zones in hydrothermal vein-type systems similar to those of the Freiberg district. This relationship may be of potential use for exploration targeting. Stibnite (dpeaa)DE-He213 Tennantite-tetrahedrite (dpeaa)DE-He213 Fluid inclusions (dpeaa)DE-He213 Reaction path modelling (dpeaa)DE-He213 Epithermal system (dpeaa)DE-He213 Hartmann, Anthea aut Bach, Wolfgang aut Krolop, Patrick aut Krause, Joachim aut Gutzmer, Jens aut Enthalten in Mineralium deposita Berlin : Springer, 1966 54(2018), 2 vom: 05. Okt., Seite 263-280 (DE-627)254630014 (DE-600)1462046-7 1432-1866 nnns volume:54 year:2018 number:2 day:05 month:10 pages:263-280 https://dx.doi.org/10.1007/s00126-018-0842-0 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 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_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_381 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 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_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 54 2018 2 05 10 263-280 |
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10.1007/s00126-018-0842-0 doi (DE-627)SPR001033956 (SPR)s00126-018-0842-0-e DE-627 ger DE-627 rakwb eng Burisch, Mathias verfasserin (orcid)0000-0001-5574-2210 aut Genesis of hydrothermal silver-antimony-sulfide veins of the Bräunsdorf sector as part of the classic Freiberg silver mining district, Germany 2018 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Springer-Verlag GmbH Germany, part of Springer Nature 2018 Abstract The peripheral regions of the Freiberg vein-type silver mining district comprise several sub-districts of which Bräunsdorf was among the richest in terms of Ag grade. Historically, 114 t (about 3.9 million ounces) of Ag were produced from the Neue Hoffnung Gottes mine near Bräunsdorf. The Neuer Segen Gottes Stehender is a sigmoidally shaped NNE-SSW trending vein, which varies significantly in thickness (0.05 to 3 m) and extends over about 2.6 km strike length at the surface. The vein infill is marked by a Pb-Zn-Cu-Fe-sulfide-quartz (stage 1) and an abundant Ag-Sb-sulfide/sulfosalt-quartz ± carbonate assemblage (stage 2). To develop a sound genetic understanding of the polymetallic mineralisation in the Bräunsdorf sub-district, we conducted detailed textural analyses of ore and gangue minerals, fluid inclusion analyses, electron microprobe analyses and thermodynamic computations in order to characterise the ore fluids and ore-forming processes. The early-stage Pb-Zn-Cu-Fe-sulfide mineralisation (stage 1) is related to fluids with low salinities (0.5–4% eq. w(NaCl)) and formed at temperatures ≥ 300 °C. Microthermometric data related to the Ag-Sb-sulfide/sulfosalt assemblage (stage 2) show similar salinites compared to ore stage 1, but have significantly lower homogenisation temperatures in the range of 180–280 °C. Based on fluid inclusion data, cooling can be regarded as the major ore-forming process. Reaction path model calculations for cooling of fluids with different initial pH values (4, 5.5 and 7) reproduce the observed mineral assemblages very well and predict spatial zonation of the Ag-Sb- and Sb-sulfide minerals that are in excellent agreement with field observations. We conclude that Ag-rich zones may well occur below Sb-rich zones in hydrothermal vein-type systems similar to those of the Freiberg district. This relationship may be of potential use for exploration targeting. Stibnite (dpeaa)DE-He213 Tennantite-tetrahedrite (dpeaa)DE-He213 Fluid inclusions (dpeaa)DE-He213 Reaction path modelling (dpeaa)DE-He213 Epithermal system (dpeaa)DE-He213 Hartmann, Anthea aut Bach, Wolfgang aut Krolop, Patrick aut Krause, Joachim aut Gutzmer, Jens aut Enthalten in Mineralium deposita Berlin : Springer, 1966 54(2018), 2 vom: 05. Okt., Seite 263-280 (DE-627)254630014 (DE-600)1462046-7 1432-1866 nnns volume:54 year:2018 number:2 day:05 month:10 pages:263-280 https://dx.doi.org/10.1007/s00126-018-0842-0 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 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_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_381 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 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_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 54 2018 2 05 10 263-280 |
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Burisch, Mathias @@aut@@ Hartmann, Anthea @@aut@@ Bach, Wolfgang @@aut@@ Krolop, Patrick @@aut@@ Krause, Joachim @@aut@@ Gutzmer, Jens @@aut@@ |
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Historically, 114 t (about 3.9 million ounces) of Ag were produced from the Neue Hoffnung Gottes mine near Bräunsdorf. The Neuer Segen Gottes Stehender is a sigmoidally shaped NNE-SSW trending vein, which varies significantly in thickness (0.05 to 3 m) and extends over about 2.6 km strike length at the surface. The vein infill is marked by a Pb-Zn-Cu-Fe-sulfide-quartz (stage 1) and an abundant Ag-Sb-sulfide/sulfosalt-quartz ± carbonate assemblage (stage 2). To develop a sound genetic understanding of the polymetallic mineralisation in the Bräunsdorf sub-district, we conducted detailed textural analyses of ore and gangue minerals, fluid inclusion analyses, electron microprobe analyses and thermodynamic computations in order to characterise the ore fluids and ore-forming processes. The early-stage Pb-Zn-Cu-Fe-sulfide mineralisation (stage 1) is related to fluids with low salinities (0.5–4% eq. w(NaCl)) and formed at temperatures ≥ 300 °C. Microthermometric data related to the Ag-Sb-sulfide/sulfosalt assemblage (stage 2) show similar salinites compared to ore stage 1, but have significantly lower homogenisation temperatures in the range of 180–280 °C. Based on fluid inclusion data, cooling can be regarded as the major ore-forming process. Reaction path model calculations for cooling of fluids with different initial pH values (4, 5.5 and 7) reproduce the observed mineral assemblages very well and predict spatial zonation of the Ag-Sb- and Sb-sulfide minerals that are in excellent agreement with field observations. We conclude that Ag-rich zones may well occur below Sb-rich zones in hydrothermal vein-type systems similar to those of the Freiberg district. 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Burisch, Mathias |
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Burisch, Mathias misc Stibnite misc Tennantite-tetrahedrite misc Fluid inclusions misc Reaction path modelling misc Epithermal system Genesis of hydrothermal silver-antimony-sulfide veins of the Bräunsdorf sector as part of the classic Freiberg silver mining district, Germany |
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Genesis of hydrothermal silver-antimony-sulfide veins of the Bräunsdorf sector as part of the classic Freiberg silver mining district, Germany Stibnite (dpeaa)DE-He213 Tennantite-tetrahedrite (dpeaa)DE-He213 Fluid inclusions (dpeaa)DE-He213 Reaction path modelling (dpeaa)DE-He213 Epithermal system (dpeaa)DE-He213 |
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genesis of hydrothermal silver-antimony-sulfide veins of the bräunsdorf sector as part of the classic freiberg silver mining district, germany |
| title_auth |
Genesis of hydrothermal silver-antimony-sulfide veins of the Bräunsdorf sector as part of the classic Freiberg silver mining district, Germany |
| abstract |
Abstract The peripheral regions of the Freiberg vein-type silver mining district comprise several sub-districts of which Bräunsdorf was among the richest in terms of Ag grade. Historically, 114 t (about 3.9 million ounces) of Ag were produced from the Neue Hoffnung Gottes mine near Bräunsdorf. The Neuer Segen Gottes Stehender is a sigmoidally shaped NNE-SSW trending vein, which varies significantly in thickness (0.05 to 3 m) and extends over about 2.6 km strike length at the surface. The vein infill is marked by a Pb-Zn-Cu-Fe-sulfide-quartz (stage 1) and an abundant Ag-Sb-sulfide/sulfosalt-quartz ± carbonate assemblage (stage 2). To develop a sound genetic understanding of the polymetallic mineralisation in the Bräunsdorf sub-district, we conducted detailed textural analyses of ore and gangue minerals, fluid inclusion analyses, electron microprobe analyses and thermodynamic computations in order to characterise the ore fluids and ore-forming processes. The early-stage Pb-Zn-Cu-Fe-sulfide mineralisation (stage 1) is related to fluids with low salinities (0.5–4% eq. w(NaCl)) and formed at temperatures ≥ 300 °C. Microthermometric data related to the Ag-Sb-sulfide/sulfosalt assemblage (stage 2) show similar salinites compared to ore stage 1, but have significantly lower homogenisation temperatures in the range of 180–280 °C. Based on fluid inclusion data, cooling can be regarded as the major ore-forming process. Reaction path model calculations for cooling of fluids with different initial pH values (4, 5.5 and 7) reproduce the observed mineral assemblages very well and predict spatial zonation of the Ag-Sb- and Sb-sulfide minerals that are in excellent agreement with field observations. We conclude that Ag-rich zones may well occur below Sb-rich zones in hydrothermal vein-type systems similar to those of the Freiberg district. This relationship may be of potential use for exploration targeting. © Springer-Verlag GmbH Germany, part of Springer Nature 2018 |
| abstractGer |
Abstract The peripheral regions of the Freiberg vein-type silver mining district comprise several sub-districts of which Bräunsdorf was among the richest in terms of Ag grade. Historically, 114 t (about 3.9 million ounces) of Ag were produced from the Neue Hoffnung Gottes mine near Bräunsdorf. The Neuer Segen Gottes Stehender is a sigmoidally shaped NNE-SSW trending vein, which varies significantly in thickness (0.05 to 3 m) and extends over about 2.6 km strike length at the surface. The vein infill is marked by a Pb-Zn-Cu-Fe-sulfide-quartz (stage 1) and an abundant Ag-Sb-sulfide/sulfosalt-quartz ± carbonate assemblage (stage 2). To develop a sound genetic understanding of the polymetallic mineralisation in the Bräunsdorf sub-district, we conducted detailed textural analyses of ore and gangue minerals, fluid inclusion analyses, electron microprobe analyses and thermodynamic computations in order to characterise the ore fluids and ore-forming processes. The early-stage Pb-Zn-Cu-Fe-sulfide mineralisation (stage 1) is related to fluids with low salinities (0.5–4% eq. w(NaCl)) and formed at temperatures ≥ 300 °C. Microthermometric data related to the Ag-Sb-sulfide/sulfosalt assemblage (stage 2) show similar salinites compared to ore stage 1, but have significantly lower homogenisation temperatures in the range of 180–280 °C. Based on fluid inclusion data, cooling can be regarded as the major ore-forming process. Reaction path model calculations for cooling of fluids with different initial pH values (4, 5.5 and 7) reproduce the observed mineral assemblages very well and predict spatial zonation of the Ag-Sb- and Sb-sulfide minerals that are in excellent agreement with field observations. We conclude that Ag-rich zones may well occur below Sb-rich zones in hydrothermal vein-type systems similar to those of the Freiberg district. This relationship may be of potential use for exploration targeting. © Springer-Verlag GmbH Germany, part of Springer Nature 2018 |
| abstract_unstemmed |
Abstract The peripheral regions of the Freiberg vein-type silver mining district comprise several sub-districts of which Bräunsdorf was among the richest in terms of Ag grade. Historically, 114 t (about 3.9 million ounces) of Ag were produced from the Neue Hoffnung Gottes mine near Bräunsdorf. The Neuer Segen Gottes Stehender is a sigmoidally shaped NNE-SSW trending vein, which varies significantly in thickness (0.05 to 3 m) and extends over about 2.6 km strike length at the surface. The vein infill is marked by a Pb-Zn-Cu-Fe-sulfide-quartz (stage 1) and an abundant Ag-Sb-sulfide/sulfosalt-quartz ± carbonate assemblage (stage 2). To develop a sound genetic understanding of the polymetallic mineralisation in the Bräunsdorf sub-district, we conducted detailed textural analyses of ore and gangue minerals, fluid inclusion analyses, electron microprobe analyses and thermodynamic computations in order to characterise the ore fluids and ore-forming processes. The early-stage Pb-Zn-Cu-Fe-sulfide mineralisation (stage 1) is related to fluids with low salinities (0.5–4% eq. w(NaCl)) and formed at temperatures ≥ 300 °C. Microthermometric data related to the Ag-Sb-sulfide/sulfosalt assemblage (stage 2) show similar salinites compared to ore stage 1, but have significantly lower homogenisation temperatures in the range of 180–280 °C. Based on fluid inclusion data, cooling can be regarded as the major ore-forming process. Reaction path model calculations for cooling of fluids with different initial pH values (4, 5.5 and 7) reproduce the observed mineral assemblages very well and predict spatial zonation of the Ag-Sb- and Sb-sulfide minerals that are in excellent agreement with field observations. We conclude that Ag-rich zones may well occur below Sb-rich zones in hydrothermal vein-type systems similar to those of the Freiberg district. This relationship may be of potential use for exploration targeting. © Springer-Verlag GmbH Germany, part of Springer Nature 2018 |
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2 |
| title_short |
Genesis of hydrothermal silver-antimony-sulfide veins of the Bräunsdorf sector as part of the classic Freiberg silver mining district, Germany |
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https://dx.doi.org/10.1007/s00126-018-0842-0 |
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Hartmann, Anthea Bach, Wolfgang Krolop, Patrick Krause, Joachim Gutzmer, Jens |
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| score |
7.3976994 |