Mineralogy and petrology of gneiss hosted corundum deposits from the Day Nui Con Voi metamorphic range, Ailao Shan–Red River shear zone (North Vietnam)
Corundum deposits and occurrences are typically associated with marbles in northern Vietnam. Relatively little at- tention has been paid to corundum hosted by partly migmatized gneisses and pegmatoids of the Day Nui Con Voi range, Ailao Shan–Red River shear zone, North Vietnam. The partly migmatized...
Ausführliche Beschreibung
Autor*in: |
Anh Tuan, Duong [verfasserIn] |
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Format: |
Artikel |
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Sprache: |
Englisch |
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2016 |
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Schlagwörter: |
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Übergeordnetes Werk: |
Enthalten in: Neues Jahrbuch für Mineralogie / Abhandlungen - Stuttgart : Schweizerbart, 1950, 193(2016), 2, Seite 161-181 |
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Übergeordnetes Werk: |
volume:193 ; year:2016 ; number:2 ; pages:161-181 |
Links: |
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DOI / URN: |
10.1127/njma/2016/0300 |
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Katalog-ID: |
OLC1975112695 |
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245 | 1 | 0 | |a Mineralogy and petrology of gneiss hosted corundum deposits from the Day Nui Con Voi metamorphic range, Ailao Shan–Red River shear zone (North Vietnam) |
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520 | |a Corundum deposits and occurrences are typically associated with marbles in northern Vietnam. Relatively little at- tention has been paid to corundum hosted by partly migmatized gneisses and pegmatoids of the Day Nui Con Voi range, Ailao Shan–Red River shear zone, North Vietnam. The partly migmatized gneisses contain gray, grayish white to bluish, and yellowish gray sapphires (type 1) while dark red to pinkish rubies occur in feldspathic pegmatoid rocks (type II). Corundum crystals from both types are short prismatic with partly hexagonal tabular shape considerably varying in size. Common inclusions are ilmenite, magnetite, rutile, plagioclase, muscovite, biotite, apatite, zircon, boehmite and iron stains. Growth structures and deformed twinning with star effect can be observed as well. Type I corundum is noted for high content of total Fe (5500 to 7133 ppm), low content of Cr and Ti (59 to 65 and 40 to 58 ppm, respectively), whereas, in corundum of type II the Fe and Cr contents are medium (1028 and 940 ppm, respectively), with low content of Ti (42 ppm). Gneisses hosting type I corundum are characterized by three different mineral parageneses (1) sillimanite+corundum+K-feldspar+biotite; (2) sillimanite+garnet+spinel+corundum+biotite+K- feldspar+plagioclase+ilmenite, and (3) sillimanite+garnet+spinel+corundum+clinopyroxene+ilmenite. Type II corundum occurs in feldspathic pegmatoid rocks consisting of a paragenesis garnet+biotite+plagioclase+K-feldspar+corundum. Sapphire in gneisses (type I) crystallized during regional metamorphism of silica undersaturated metapelites and metapsammites at upper amphibolite to lower granulite facies conditions. Ruby found in desilicated feldspathic rocks (type II) probably formed at the contact of migmatitized pegmatoid bodies with either metabasic to metaultrabasic rocks or marbles. The metamorphic P-T condition of corundum formation was estimated with 650 to 760 °C and 5.0 to 7.6 kbar based on thermobarometric calculations.40 K/40 Ar cooling ages obtained from biotite in gneisses indicate that the rocks reached ~300 °C at ~23 Ma. | ||
650 | 4 | |a paragenesis | |
650 | 4 | |a corundum deposit | |
650 | 4 | |a genetic aspects | |
650 | 4 | |a day nui con voi range | |
650 | 4 | |a petrology | |
650 | 4 | |a gneiss | |
650 | 4 | |a ailao shan–red river shear zone | |
650 | 4 | |a mineralogy | |
700 | 1 | |a Ngoc Khoi, Nguyen |4 oth | |
700 | 1 | |a Van Nam, Nguyen |4 oth | |
700 | 1 | |a Häger, Tobias |4 oth | |
700 | 1 | |a Hauzenberger, Christoph A |4 oth | |
700 | 1 | |a Thuy Duong, Nguyen |4 oth | |
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10.1127/njma/2016/0300 doi PQ20160610 (DE-627)OLC1975112695 (DE-599)GBVOLC1975112695 (PRQ)s685-85ca8ebc4a91a7238f60ef2060e0e74047192981dd199ccb773f7ab87baed730 (KEY)0064947320160000193000200161mineralogyandpetrologyofgneisshostedcorundumdeposi DE-627 ger DE-627 rakwb eng 540 DNB 550 AVZ Anh Tuan, Duong verfasserin aut Mineralogy and petrology of gneiss hosted corundum deposits from the Day Nui Con Voi metamorphic range, Ailao Shan–Red River shear zone (North Vietnam) 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Corundum deposits and occurrences are typically associated with marbles in northern Vietnam. Relatively little at- tention has been paid to corundum hosted by partly migmatized gneisses and pegmatoids of the Day Nui Con Voi range, Ailao Shan–Red River shear zone, North Vietnam. The partly migmatized gneisses contain gray, grayish white to bluish, and yellowish gray sapphires (type 1) while dark red to pinkish rubies occur in feldspathic pegmatoid rocks (type II). Corundum crystals from both types are short prismatic with partly hexagonal tabular shape considerably varying in size. Common inclusions are ilmenite, magnetite, rutile, plagioclase, muscovite, biotite, apatite, zircon, boehmite and iron stains. Growth structures and deformed twinning with star effect can be observed as well. Type I corundum is noted for high content of total Fe (5500 to 7133 ppm), low content of Cr and Ti (59 to 65 and 40 to 58 ppm, respectively), whereas, in corundum of type II the Fe and Cr contents are medium (1028 and 940 ppm, respectively), with low content of Ti (42 ppm). Gneisses hosting type I corundum are characterized by three different mineral parageneses (1) sillimanite+corundum+K-feldspar+biotite; (2) sillimanite+garnet+spinel+corundum+biotite+K- feldspar+plagioclase+ilmenite, and (3) sillimanite+garnet+spinel+corundum+clinopyroxene+ilmenite. Type II corundum occurs in feldspathic pegmatoid rocks consisting of a paragenesis garnet+biotite+plagioclase+K-feldspar+corundum. Sapphire in gneisses (type I) crystallized during regional metamorphism of silica undersaturated metapelites and metapsammites at upper amphibolite to lower granulite facies conditions. Ruby found in desilicated feldspathic rocks (type II) probably formed at the contact of migmatitized pegmatoid bodies with either metabasic to metaultrabasic rocks or marbles. The metamorphic P-T condition of corundum formation was estimated with 650 to 760 °C and 5.0 to 7.6 kbar based on thermobarometric calculations.40 K/40 Ar cooling ages obtained from biotite in gneisses indicate that the rocks reached ~300 °C at ~23 Ma. paragenesis corundum deposit genetic aspects day nui con voi range petrology gneiss ailao shan–red river shear zone mineralogy Ngoc Khoi, Nguyen oth Van Nam, Nguyen oth Häger, Tobias oth Hauzenberger, Christoph A oth Thuy Duong, Nguyen oth Enthalten in Neues Jahrbuch für Mineralogie / Abhandlungen Stuttgart : Schweizerbart, 1950 193(2016), 2, Seite 161-181 (DE-627)129304662 (DE-600)123943-0 (DE-576)014499770 0077-7757 nnns volume:193 year:2016 number:2 pages:161-181 http://dx.doi.org/10.1127/njma/2016/0300 Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_21 GBV_ILN_24 GBV_ILN_30 GBV_ILN_65 GBV_ILN_70 GBV_ILN_188 GBV_ILN_2004 GBV_ILN_2008 GBV_ILN_2010 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2027 GBV_ILN_2173 GBV_ILN_2346 GBV_ILN_4046 GBV_ILN_4277 AR 193 2016 2 161-181 |
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10.1127/njma/2016/0300 doi PQ20160610 (DE-627)OLC1975112695 (DE-599)GBVOLC1975112695 (PRQ)s685-85ca8ebc4a91a7238f60ef2060e0e74047192981dd199ccb773f7ab87baed730 (KEY)0064947320160000193000200161mineralogyandpetrologyofgneisshostedcorundumdeposi DE-627 ger DE-627 rakwb eng 540 DNB 550 AVZ Anh Tuan, Duong verfasserin aut Mineralogy and petrology of gneiss hosted corundum deposits from the Day Nui Con Voi metamorphic range, Ailao Shan–Red River shear zone (North Vietnam) 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Corundum deposits and occurrences are typically associated with marbles in northern Vietnam. Relatively little at- tention has been paid to corundum hosted by partly migmatized gneisses and pegmatoids of the Day Nui Con Voi range, Ailao Shan–Red River shear zone, North Vietnam. The partly migmatized gneisses contain gray, grayish white to bluish, and yellowish gray sapphires (type 1) while dark red to pinkish rubies occur in feldspathic pegmatoid rocks (type II). Corundum crystals from both types are short prismatic with partly hexagonal tabular shape considerably varying in size. Common inclusions are ilmenite, magnetite, rutile, plagioclase, muscovite, biotite, apatite, zircon, boehmite and iron stains. Growth structures and deformed twinning with star effect can be observed as well. Type I corundum is noted for high content of total Fe (5500 to 7133 ppm), low content of Cr and Ti (59 to 65 and 40 to 58 ppm, respectively), whereas, in corundum of type II the Fe and Cr contents are medium (1028 and 940 ppm, respectively), with low content of Ti (42 ppm). Gneisses hosting type I corundum are characterized by three different mineral parageneses (1) sillimanite+corundum+K-feldspar+biotite; (2) sillimanite+garnet+spinel+corundum+biotite+K- feldspar+plagioclase+ilmenite, and (3) sillimanite+garnet+spinel+corundum+clinopyroxene+ilmenite. Type II corundum occurs in feldspathic pegmatoid rocks consisting of a paragenesis garnet+biotite+plagioclase+K-feldspar+corundum. Sapphire in gneisses (type I) crystallized during regional metamorphism of silica undersaturated metapelites and metapsammites at upper amphibolite to lower granulite facies conditions. Ruby found in desilicated feldspathic rocks (type II) probably formed at the contact of migmatitized pegmatoid bodies with either metabasic to metaultrabasic rocks or marbles. The metamorphic P-T condition of corundum formation was estimated with 650 to 760 °C and 5.0 to 7.6 kbar based on thermobarometric calculations.40 K/40 Ar cooling ages obtained from biotite in gneisses indicate that the rocks reached ~300 °C at ~23 Ma. paragenesis corundum deposit genetic aspects day nui con voi range petrology gneiss ailao shan–red river shear zone mineralogy Ngoc Khoi, Nguyen oth Van Nam, Nguyen oth Häger, Tobias oth Hauzenberger, Christoph A oth Thuy Duong, Nguyen oth Enthalten in Neues Jahrbuch für Mineralogie / Abhandlungen Stuttgart : Schweizerbart, 1950 193(2016), 2, Seite 161-181 (DE-627)129304662 (DE-600)123943-0 (DE-576)014499770 0077-7757 nnns volume:193 year:2016 number:2 pages:161-181 http://dx.doi.org/10.1127/njma/2016/0300 Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_21 GBV_ILN_24 GBV_ILN_30 GBV_ILN_65 GBV_ILN_70 GBV_ILN_188 GBV_ILN_2004 GBV_ILN_2008 GBV_ILN_2010 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2027 GBV_ILN_2173 GBV_ILN_2346 GBV_ILN_4046 GBV_ILN_4277 AR 193 2016 2 161-181 |
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10.1127/njma/2016/0300 doi PQ20160610 (DE-627)OLC1975112695 (DE-599)GBVOLC1975112695 (PRQ)s685-85ca8ebc4a91a7238f60ef2060e0e74047192981dd199ccb773f7ab87baed730 (KEY)0064947320160000193000200161mineralogyandpetrologyofgneisshostedcorundumdeposi DE-627 ger DE-627 rakwb eng 540 DNB 550 AVZ Anh Tuan, Duong verfasserin aut Mineralogy and petrology of gneiss hosted corundum deposits from the Day Nui Con Voi metamorphic range, Ailao Shan–Red River shear zone (North Vietnam) 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Corundum deposits and occurrences are typically associated with marbles in northern Vietnam. Relatively little at- tention has been paid to corundum hosted by partly migmatized gneisses and pegmatoids of the Day Nui Con Voi range, Ailao Shan–Red River shear zone, North Vietnam. The partly migmatized gneisses contain gray, grayish white to bluish, and yellowish gray sapphires (type 1) while dark red to pinkish rubies occur in feldspathic pegmatoid rocks (type II). Corundum crystals from both types are short prismatic with partly hexagonal tabular shape considerably varying in size. Common inclusions are ilmenite, magnetite, rutile, plagioclase, muscovite, biotite, apatite, zircon, boehmite and iron stains. Growth structures and deformed twinning with star effect can be observed as well. Type I corundum is noted for high content of total Fe (5500 to 7133 ppm), low content of Cr and Ti (59 to 65 and 40 to 58 ppm, respectively), whereas, in corundum of type II the Fe and Cr contents are medium (1028 and 940 ppm, respectively), with low content of Ti (42 ppm). Gneisses hosting type I corundum are characterized by three different mineral parageneses (1) sillimanite+corundum+K-feldspar+biotite; (2) sillimanite+garnet+spinel+corundum+biotite+K- feldspar+plagioclase+ilmenite, and (3) sillimanite+garnet+spinel+corundum+clinopyroxene+ilmenite. Type II corundum occurs in feldspathic pegmatoid rocks consisting of a paragenesis garnet+biotite+plagioclase+K-feldspar+corundum. Sapphire in gneisses (type I) crystallized during regional metamorphism of silica undersaturated metapelites and metapsammites at upper amphibolite to lower granulite facies conditions. Ruby found in desilicated feldspathic rocks (type II) probably formed at the contact of migmatitized pegmatoid bodies with either metabasic to metaultrabasic rocks or marbles. The metamorphic P-T condition of corundum formation was estimated with 650 to 760 °C and 5.0 to 7.6 kbar based on thermobarometric calculations.40 K/40 Ar cooling ages obtained from biotite in gneisses indicate that the rocks reached ~300 °C at ~23 Ma. paragenesis corundum deposit genetic aspects day nui con voi range petrology gneiss ailao shan–red river shear zone mineralogy Ngoc Khoi, Nguyen oth Van Nam, Nguyen oth Häger, Tobias oth Hauzenberger, Christoph A oth Thuy Duong, Nguyen oth Enthalten in Neues Jahrbuch für Mineralogie / Abhandlungen Stuttgart : Schweizerbart, 1950 193(2016), 2, Seite 161-181 (DE-627)129304662 (DE-600)123943-0 (DE-576)014499770 0077-7757 nnns volume:193 year:2016 number:2 pages:161-181 http://dx.doi.org/10.1127/njma/2016/0300 Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_21 GBV_ILN_24 GBV_ILN_30 GBV_ILN_65 GBV_ILN_70 GBV_ILN_188 GBV_ILN_2004 GBV_ILN_2008 GBV_ILN_2010 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2027 GBV_ILN_2173 GBV_ILN_2346 GBV_ILN_4046 GBV_ILN_4277 AR 193 2016 2 161-181 |
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10.1127/njma/2016/0300 doi PQ20160610 (DE-627)OLC1975112695 (DE-599)GBVOLC1975112695 (PRQ)s685-85ca8ebc4a91a7238f60ef2060e0e74047192981dd199ccb773f7ab87baed730 (KEY)0064947320160000193000200161mineralogyandpetrologyofgneisshostedcorundumdeposi DE-627 ger DE-627 rakwb eng 540 DNB 550 AVZ Anh Tuan, Duong verfasserin aut Mineralogy and petrology of gneiss hosted corundum deposits from the Day Nui Con Voi metamorphic range, Ailao Shan–Red River shear zone (North Vietnam) 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Corundum deposits and occurrences are typically associated with marbles in northern Vietnam. Relatively little at- tention has been paid to corundum hosted by partly migmatized gneisses and pegmatoids of the Day Nui Con Voi range, Ailao Shan–Red River shear zone, North Vietnam. The partly migmatized gneisses contain gray, grayish white to bluish, and yellowish gray sapphires (type 1) while dark red to pinkish rubies occur in feldspathic pegmatoid rocks (type II). Corundum crystals from both types are short prismatic with partly hexagonal tabular shape considerably varying in size. Common inclusions are ilmenite, magnetite, rutile, plagioclase, muscovite, biotite, apatite, zircon, boehmite and iron stains. Growth structures and deformed twinning with star effect can be observed as well. Type I corundum is noted for high content of total Fe (5500 to 7133 ppm), low content of Cr and Ti (59 to 65 and 40 to 58 ppm, respectively), whereas, in corundum of type II the Fe and Cr contents are medium (1028 and 940 ppm, respectively), with low content of Ti (42 ppm). Gneisses hosting type I corundum are characterized by three different mineral parageneses (1) sillimanite+corundum+K-feldspar+biotite; (2) sillimanite+garnet+spinel+corundum+biotite+K- feldspar+plagioclase+ilmenite, and (3) sillimanite+garnet+spinel+corundum+clinopyroxene+ilmenite. Type II corundum occurs in feldspathic pegmatoid rocks consisting of a paragenesis garnet+biotite+plagioclase+K-feldspar+corundum. Sapphire in gneisses (type I) crystallized during regional metamorphism of silica undersaturated metapelites and metapsammites at upper amphibolite to lower granulite facies conditions. Ruby found in desilicated feldspathic rocks (type II) probably formed at the contact of migmatitized pegmatoid bodies with either metabasic to metaultrabasic rocks or marbles. The metamorphic P-T condition of corundum formation was estimated with 650 to 760 °C and 5.0 to 7.6 kbar based on thermobarometric calculations.40 K/40 Ar cooling ages obtained from biotite in gneisses indicate that the rocks reached ~300 °C at ~23 Ma. paragenesis corundum deposit genetic aspects day nui con voi range petrology gneiss ailao shan–red river shear zone mineralogy Ngoc Khoi, Nguyen oth Van Nam, Nguyen oth Häger, Tobias oth Hauzenberger, Christoph A oth Thuy Duong, Nguyen oth Enthalten in Neues Jahrbuch für Mineralogie / Abhandlungen Stuttgart : Schweizerbart, 1950 193(2016), 2, Seite 161-181 (DE-627)129304662 (DE-600)123943-0 (DE-576)014499770 0077-7757 nnns volume:193 year:2016 number:2 pages:161-181 http://dx.doi.org/10.1127/njma/2016/0300 Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_21 GBV_ILN_24 GBV_ILN_30 GBV_ILN_65 GBV_ILN_70 GBV_ILN_188 GBV_ILN_2004 GBV_ILN_2008 GBV_ILN_2010 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2027 GBV_ILN_2173 GBV_ILN_2346 GBV_ILN_4046 GBV_ILN_4277 AR 193 2016 2 161-181 |
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10.1127/njma/2016/0300 doi PQ20160610 (DE-627)OLC1975112695 (DE-599)GBVOLC1975112695 (PRQ)s685-85ca8ebc4a91a7238f60ef2060e0e74047192981dd199ccb773f7ab87baed730 (KEY)0064947320160000193000200161mineralogyandpetrologyofgneisshostedcorundumdeposi DE-627 ger DE-627 rakwb eng 540 DNB 550 AVZ Anh Tuan, Duong verfasserin aut Mineralogy and petrology of gneiss hosted corundum deposits from the Day Nui Con Voi metamorphic range, Ailao Shan–Red River shear zone (North Vietnam) 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Corundum deposits and occurrences are typically associated with marbles in northern Vietnam. Relatively little at- tention has been paid to corundum hosted by partly migmatized gneisses and pegmatoids of the Day Nui Con Voi range, Ailao Shan–Red River shear zone, North Vietnam. The partly migmatized gneisses contain gray, grayish white to bluish, and yellowish gray sapphires (type 1) while dark red to pinkish rubies occur in feldspathic pegmatoid rocks (type II). Corundum crystals from both types are short prismatic with partly hexagonal tabular shape considerably varying in size. Common inclusions are ilmenite, magnetite, rutile, plagioclase, muscovite, biotite, apatite, zircon, boehmite and iron stains. Growth structures and deformed twinning with star effect can be observed as well. Type I corundum is noted for high content of total Fe (5500 to 7133 ppm), low content of Cr and Ti (59 to 65 and 40 to 58 ppm, respectively), whereas, in corundum of type II the Fe and Cr contents are medium (1028 and 940 ppm, respectively), with low content of Ti (42 ppm). Gneisses hosting type I corundum are characterized by three different mineral parageneses (1) sillimanite+corundum+K-feldspar+biotite; (2) sillimanite+garnet+spinel+corundum+biotite+K- feldspar+plagioclase+ilmenite, and (3) sillimanite+garnet+spinel+corundum+clinopyroxene+ilmenite. Type II corundum occurs in feldspathic pegmatoid rocks consisting of a paragenesis garnet+biotite+plagioclase+K-feldspar+corundum. Sapphire in gneisses (type I) crystallized during regional metamorphism of silica undersaturated metapelites and metapsammites at upper amphibolite to lower granulite facies conditions. Ruby found in desilicated feldspathic rocks (type II) probably formed at the contact of migmatitized pegmatoid bodies with either metabasic to metaultrabasic rocks or marbles. The metamorphic P-T condition of corundum formation was estimated with 650 to 760 °C and 5.0 to 7.6 kbar based on thermobarometric calculations.40 K/40 Ar cooling ages obtained from biotite in gneisses indicate that the rocks reached ~300 °C at ~23 Ma. paragenesis corundum deposit genetic aspects day nui con voi range petrology gneiss ailao shan–red river shear zone mineralogy Ngoc Khoi, Nguyen oth Van Nam, Nguyen oth Häger, Tobias oth Hauzenberger, Christoph A oth Thuy Duong, Nguyen oth Enthalten in Neues Jahrbuch für Mineralogie / Abhandlungen Stuttgart : Schweizerbart, 1950 193(2016), 2, Seite 161-181 (DE-627)129304662 (DE-600)123943-0 (DE-576)014499770 0077-7757 nnns volume:193 year:2016 number:2 pages:161-181 http://dx.doi.org/10.1127/njma/2016/0300 Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_21 GBV_ILN_24 GBV_ILN_30 GBV_ILN_65 GBV_ILN_70 GBV_ILN_188 GBV_ILN_2004 GBV_ILN_2008 GBV_ILN_2010 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2027 GBV_ILN_2173 GBV_ILN_2346 GBV_ILN_4046 GBV_ILN_4277 AR 193 2016 2 161-181 |
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Anh Tuan, Duong @@aut@@ Ngoc Khoi, Nguyen @@oth@@ Van Nam, Nguyen @@oth@@ Häger, Tobias @@oth@@ Hauzenberger, Christoph A @@oth@@ Thuy Duong, Nguyen @@oth@@ |
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2016-01-01T00:00:00Z |
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Anh Tuan, Duong |
spellingShingle |
Anh Tuan, Duong ddc 540 ddc 550 misc paragenesis misc corundum deposit misc genetic aspects misc day nui con voi range misc petrology misc gneiss misc ailao shan–red river shear zone misc mineralogy Mineralogy and petrology of gneiss hosted corundum deposits from the Day Nui Con Voi metamorphic range, Ailao Shan–Red River shear zone (North Vietnam) |
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540 DNB 550 AVZ Mineralogy and petrology of gneiss hosted corundum deposits from the Day Nui Con Voi metamorphic range, Ailao Shan–Red River shear zone (North Vietnam) paragenesis corundum deposit genetic aspects day nui con voi range petrology gneiss ailao shan–red river shear zone mineralogy |
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Mineralogy and petrology of gneiss hosted corundum deposits from the Day Nui Con Voi metamorphic range, Ailao Shan–Red River shear zone (North Vietnam) |
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Mineralogy and petrology of gneiss hosted corundum deposits from the Day Nui Con Voi metamorphic range, Ailao Shan–Red River shear zone (North Vietnam) |
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mineralogy and petrology of gneiss hosted corundum deposits from the day nui con voi metamorphic range, ailao shan–red river shear zone (north vietnam) |
title_auth |
Mineralogy and petrology of gneiss hosted corundum deposits from the Day Nui Con Voi metamorphic range, Ailao Shan–Red River shear zone (North Vietnam) |
abstract |
Corundum deposits and occurrences are typically associated with marbles in northern Vietnam. Relatively little at- tention has been paid to corundum hosted by partly migmatized gneisses and pegmatoids of the Day Nui Con Voi range, Ailao Shan–Red River shear zone, North Vietnam. The partly migmatized gneisses contain gray, grayish white to bluish, and yellowish gray sapphires (type 1) while dark red to pinkish rubies occur in feldspathic pegmatoid rocks (type II). Corundum crystals from both types are short prismatic with partly hexagonal tabular shape considerably varying in size. Common inclusions are ilmenite, magnetite, rutile, plagioclase, muscovite, biotite, apatite, zircon, boehmite and iron stains. Growth structures and deformed twinning with star effect can be observed as well. Type I corundum is noted for high content of total Fe (5500 to 7133 ppm), low content of Cr and Ti (59 to 65 and 40 to 58 ppm, respectively), whereas, in corundum of type II the Fe and Cr contents are medium (1028 and 940 ppm, respectively), with low content of Ti (42 ppm). Gneisses hosting type I corundum are characterized by three different mineral parageneses (1) sillimanite+corundum+K-feldspar+biotite; (2) sillimanite+garnet+spinel+corundum+biotite+K- feldspar+plagioclase+ilmenite, and (3) sillimanite+garnet+spinel+corundum+clinopyroxene+ilmenite. Type II corundum occurs in feldspathic pegmatoid rocks consisting of a paragenesis garnet+biotite+plagioclase+K-feldspar+corundum. Sapphire in gneisses (type I) crystallized during regional metamorphism of silica undersaturated metapelites and metapsammites at upper amphibolite to lower granulite facies conditions. Ruby found in desilicated feldspathic rocks (type II) probably formed at the contact of migmatitized pegmatoid bodies with either metabasic to metaultrabasic rocks or marbles. The metamorphic P-T condition of corundum formation was estimated with 650 to 760 °C and 5.0 to 7.6 kbar based on thermobarometric calculations.40 K/40 Ar cooling ages obtained from biotite in gneisses indicate that the rocks reached ~300 °C at ~23 Ma. |
abstractGer |
Corundum deposits and occurrences are typically associated with marbles in northern Vietnam. Relatively little at- tention has been paid to corundum hosted by partly migmatized gneisses and pegmatoids of the Day Nui Con Voi range, Ailao Shan–Red River shear zone, North Vietnam. The partly migmatized gneisses contain gray, grayish white to bluish, and yellowish gray sapphires (type 1) while dark red to pinkish rubies occur in feldspathic pegmatoid rocks (type II). Corundum crystals from both types are short prismatic with partly hexagonal tabular shape considerably varying in size. Common inclusions are ilmenite, magnetite, rutile, plagioclase, muscovite, biotite, apatite, zircon, boehmite and iron stains. Growth structures and deformed twinning with star effect can be observed as well. Type I corundum is noted for high content of total Fe (5500 to 7133 ppm), low content of Cr and Ti (59 to 65 and 40 to 58 ppm, respectively), whereas, in corundum of type II the Fe and Cr contents are medium (1028 and 940 ppm, respectively), with low content of Ti (42 ppm). Gneisses hosting type I corundum are characterized by three different mineral parageneses (1) sillimanite+corundum+K-feldspar+biotite; (2) sillimanite+garnet+spinel+corundum+biotite+K- feldspar+plagioclase+ilmenite, and (3) sillimanite+garnet+spinel+corundum+clinopyroxene+ilmenite. Type II corundum occurs in feldspathic pegmatoid rocks consisting of a paragenesis garnet+biotite+plagioclase+K-feldspar+corundum. Sapphire in gneisses (type I) crystallized during regional metamorphism of silica undersaturated metapelites and metapsammites at upper amphibolite to lower granulite facies conditions. Ruby found in desilicated feldspathic rocks (type II) probably formed at the contact of migmatitized pegmatoid bodies with either metabasic to metaultrabasic rocks or marbles. The metamorphic P-T condition of corundum formation was estimated with 650 to 760 °C and 5.0 to 7.6 kbar based on thermobarometric calculations.40 K/40 Ar cooling ages obtained from biotite in gneisses indicate that the rocks reached ~300 °C at ~23 Ma. |
abstract_unstemmed |
Corundum deposits and occurrences are typically associated with marbles in northern Vietnam. Relatively little at- tention has been paid to corundum hosted by partly migmatized gneisses and pegmatoids of the Day Nui Con Voi range, Ailao Shan–Red River shear zone, North Vietnam. The partly migmatized gneisses contain gray, grayish white to bluish, and yellowish gray sapphires (type 1) while dark red to pinkish rubies occur in feldspathic pegmatoid rocks (type II). Corundum crystals from both types are short prismatic with partly hexagonal tabular shape considerably varying in size. Common inclusions are ilmenite, magnetite, rutile, plagioclase, muscovite, biotite, apatite, zircon, boehmite and iron stains. Growth structures and deformed twinning with star effect can be observed as well. Type I corundum is noted for high content of total Fe (5500 to 7133 ppm), low content of Cr and Ti (59 to 65 and 40 to 58 ppm, respectively), whereas, in corundum of type II the Fe and Cr contents are medium (1028 and 940 ppm, respectively), with low content of Ti (42 ppm). Gneisses hosting type I corundum are characterized by three different mineral parageneses (1) sillimanite+corundum+K-feldspar+biotite; (2) sillimanite+garnet+spinel+corundum+biotite+K- feldspar+plagioclase+ilmenite, and (3) sillimanite+garnet+spinel+corundum+clinopyroxene+ilmenite. Type II corundum occurs in feldspathic pegmatoid rocks consisting of a paragenesis garnet+biotite+plagioclase+K-feldspar+corundum. Sapphire in gneisses (type I) crystallized during regional metamorphism of silica undersaturated metapelites and metapsammites at upper amphibolite to lower granulite facies conditions. Ruby found in desilicated feldspathic rocks (type II) probably formed at the contact of migmatitized pegmatoid bodies with either metabasic to metaultrabasic rocks or marbles. The metamorphic P-T condition of corundum formation was estimated with 650 to 760 °C and 5.0 to 7.6 kbar based on thermobarometric calculations.40 K/40 Ar cooling ages obtained from biotite in gneisses indicate that the rocks reached ~300 °C at ~23 Ma. |
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title_short |
Mineralogy and petrology of gneiss hosted corundum deposits from the Day Nui Con Voi metamorphic range, Ailao Shan–Red River shear zone (North Vietnam) |
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<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a2200265 4500</leader><controlfield tag="001">OLC1975112695</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20220214222603.0</controlfield><controlfield tag="007">tu</controlfield><controlfield tag="008">160609s2016 xx ||||| 00| ||eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1127/njma/2016/0300</subfield><subfield code="2">doi</subfield></datafield><datafield tag="028" ind1="5" ind2="2"><subfield code="a">PQ20160610</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)OLC1975112695</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-599)GBVOLC1975112695</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(PRQ)s685-85ca8ebc4a91a7238f60ef2060e0e74047192981dd199ccb773f7ab87baed730</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(KEY)0064947320160000193000200161mineralogyandpetrologyofgneisshostedcorundumdeposi</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">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="082" ind1="0" ind2="4"><subfield code="a">540</subfield><subfield code="q">DNB</subfield></datafield><datafield tag="082" ind1="0" ind2="4"><subfield code="a">550</subfield><subfield code="q">AVZ</subfield></datafield><datafield tag="100" ind1="1" ind2=" "><subfield code="a">Anh Tuan, Duong</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Mineralogy and petrology of gneiss hosted corundum deposits from the Day Nui Con Voi metamorphic range, Ailao Shan–Red River shear zone (North Vietnam)</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2016</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">ohne Hilfsmittel zu benutzen</subfield><subfield code="b">n</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Band</subfield><subfield code="b">nc</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Corundum deposits and occurrences are typically associated with marbles in northern Vietnam. Relatively little at- tention has been paid to corundum hosted by partly migmatized gneisses and pegmatoids of the Day Nui Con Voi range, Ailao Shan–Red River shear zone, North Vietnam. The partly migmatized gneisses contain gray, grayish white to bluish, and yellowish gray sapphires (type 1) while dark red to pinkish rubies occur in feldspathic pegmatoid rocks (type II). Corundum crystals from both types are short prismatic with partly hexagonal tabular shape considerably varying in size. Common inclusions are ilmenite, magnetite, rutile, plagioclase, muscovite, biotite, apatite, zircon, boehmite and iron stains. Growth structures and deformed twinning with star effect can be observed as well. Type I corundum is noted for high content of total Fe (5500 to 7133 ppm), low content of Cr and Ti (59 to 65 and 40 to 58 ppm, respectively), whereas, in corundum of type II the Fe and Cr contents are medium (1028 and 940 ppm, respectively), with low content of Ti (42 ppm). Gneisses hosting type I corundum are characterized by three different mineral parageneses (1) sillimanite+corundum+K-feldspar+biotite; (2) sillimanite+garnet+spinel+corundum+biotite+K- feldspar+plagioclase+ilmenite, and (3) sillimanite+garnet+spinel+corundum+clinopyroxene+ilmenite. Type II corundum occurs in feldspathic pegmatoid rocks consisting of a paragenesis garnet+biotite+plagioclase+K-feldspar+corundum. Sapphire in gneisses (type I) crystallized during regional metamorphism of silica undersaturated metapelites and metapsammites at upper amphibolite to lower granulite facies conditions. Ruby found in desilicated feldspathic rocks (type II) probably formed at the contact of migmatitized pegmatoid bodies with either metabasic to metaultrabasic rocks or marbles. The metamorphic P-T condition of corundum formation was estimated with 650 to 760 °C and 5.0 to 7.6 kbar based on thermobarometric calculations.40 K/40 Ar cooling ages obtained from biotite in gneisses indicate that the rocks reached ~300 °C at ~23 Ma.</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">paragenesis</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">corundum deposit</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">genetic aspects</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">day nui con voi range</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">petrology</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">gneiss</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">ailao shan–red river shear zone</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">mineralogy</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Ngoc Khoi, Nguyen</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Van Nam, Nguyen</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Häger, Tobias</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Hauzenberger, Christoph A</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Thuy Duong, Nguyen</subfield><subfield code="4">oth</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="t">Neues Jahrbuch für Mineralogie / Abhandlungen</subfield><subfield code="d">Stuttgart : Schweizerbart, 1950</subfield><subfield code="g">193(2016), 2, Seite 161-181</subfield><subfield code="w">(DE-627)129304662</subfield><subfield code="w">(DE-600)123943-0</subfield><subfield code="w">(DE-576)014499770</subfield><subfield code="x">0077-7757</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:193</subfield><subfield code="g">year:2016</subfield><subfield code="g">number:2</subfield><subfield code="g">pages:161-181</subfield></datafield><datafield tag="856" ind1="4" ind2="1"><subfield code="u">http://dx.doi.org/10.1127/njma/2016/0300</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SYSFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_OLC</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OLC-GEO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OPC-GGO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_21</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_30</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_70</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_188</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_2008</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2010</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_2018</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_2173</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2346</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4046</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4277</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">193</subfield><subfield code="j">2016</subfield><subfield code="e">2</subfield><subfield code="h">161-181</subfield></datafield></record></collection>
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