Origin of the volcanic-hosted Yamansu Fe deposit, Eastern Tianshan, NW China: constraints from pyrite Re-Os isotopes, stable isotopes, and in situ magnetite trace elements
The Yamansu Fe deposit (32Mt at 51% Fe) in the Eastern Tianshan Orogenic Belt of NW China is hosted in early Carboniferous volcano-sedimentary rocks and spatially associated with skarn. The paragenetic sequence includes garnet-diopside (I), magnetite (II), hydrous silicate-sulfide (III), and calcite...
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ftchacadscgigcas:oai:ir.gig.ac.cn:344008/39776 2023-05-15T17:04:19+02:00 Origin of the volcanic-hosted Yamansu Fe deposit, Eastern Tianshan, NW China: constraints from pyrite Re-Os isotopes, stable isotopes, and in situ magnetite trace elements Huang, Xiao-Wen Zhou, Mei-Fu Beaudoin, Georges Gao, Jian-Feng Qi, Liang Lyu, Chuan 2018-10-01 http://ir.gig.ac.cn/handle/344008/39776 https://doi.org/10.1007/s00126-018-0794-4 英语 eng SPRINGER MINERALIUM DEPOSITA http://ir.gig.ac.cn/handle/344008/39776 doi:10.1007/s00126-018-0794-4 Geochemistry & Geophysics Mineralogy Re-Os geochronology Trace elements Magnetite Dissolution-reprecipitation Yamansu Fe deposit ASIAN OROGENIC BELT LA-ICP-MS MINERAL REPLACEMENT REACTIONS HYDROTHERMAL ORE-DEPOSITS TECTONIC EVOLUTION NORTHWESTERN CHINA IRON DEPOSIT KIRUNA-TYPE GEOLOGICAL IMPLICATIONS CONTINENTAL GROWTH 期刊论文 2018 ftchacadscgigcas https://doi.org/10.1007/s00126-018-0794-4 2020-12-22T07:21:32Z The Yamansu Fe deposit (32Mt at 51% Fe) in the Eastern Tianshan Orogenic Belt of NW China is hosted in early Carboniferous volcano-sedimentary rocks and spatially associated with skarn. The paragenetic sequence includes garnet-diopside (I), magnetite (II), hydrous silicate-sulfide (III), and calcite-quartz (IV) stages. Pyrite associated with magnetite has a Re-Os isochron age of 322 +/- 7Ma, which represents the timing of pyrite and, by inference, magnetite mineralization. Pyrite has S-34(VCDT) values of -2.2 to +2.9 parts per thousand, yielding S-34(H2S) values of -3.1 to 2 parts per thousand, indicating the derivation of sulfur from a magmatic source. Calcite from stages II and IV has C-13(VPDB) values from -2.5 to -1.2 parts per thousand, and -1.1 to 1.1 parts per thousand, and O-18(VSMOW) values from 11.8 to 12.0 parts per thousand and -7.7 to -5.2 parts per thousand, respectively. Calculated C-13 values of fluid CO2 and water O-18 values indicate that stage II hydrothermal fluids were derived from magmatic rocks and that meteoric water mixed with the hydrothermal fluids in stage IV. Some ores contain magnetite with obvious chemical zoning composed of dark and light domains in BSE images. Dark domains have higher Mg, Al, Ca, Mn, and Ti but lower Fe and Cr contents than light domains. The chemical zoning resulted from a fluctuating fluid composition and/or physicochemical conditions (oscillatory zoning), or dissolution-precipitation (irregular zoning) via infiltration of magmatic-hydrothermal fluids diluted by late meteoric water. Iron was mainly derived from fluids similar to that in skarn deposits. Report Kiruna Guangzhou Institute of Geochemistry: GIG OpenIR (Chinese Academy of Sciences) Kiruna Mineralium Deposita 53 7 1039 1060 |
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Guangzhou Institute of Geochemistry: GIG OpenIR (Chinese Academy of Sciences) |
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ftchacadscgigcas |
language |
English |
topic |
Geochemistry & Geophysics Mineralogy Re-Os geochronology Trace elements Magnetite Dissolution-reprecipitation Yamansu Fe deposit ASIAN OROGENIC BELT LA-ICP-MS MINERAL REPLACEMENT REACTIONS HYDROTHERMAL ORE-DEPOSITS TECTONIC EVOLUTION NORTHWESTERN CHINA IRON DEPOSIT KIRUNA-TYPE GEOLOGICAL IMPLICATIONS CONTINENTAL GROWTH |
spellingShingle |
Geochemistry & Geophysics Mineralogy Re-Os geochronology Trace elements Magnetite Dissolution-reprecipitation Yamansu Fe deposit ASIAN OROGENIC BELT LA-ICP-MS MINERAL REPLACEMENT REACTIONS HYDROTHERMAL ORE-DEPOSITS TECTONIC EVOLUTION NORTHWESTERN CHINA IRON DEPOSIT KIRUNA-TYPE GEOLOGICAL IMPLICATIONS CONTINENTAL GROWTH Huang, Xiao-Wen Zhou, Mei-Fu Beaudoin, Georges Gao, Jian-Feng Qi, Liang Lyu, Chuan Origin of the volcanic-hosted Yamansu Fe deposit, Eastern Tianshan, NW China: constraints from pyrite Re-Os isotopes, stable isotopes, and in situ magnetite trace elements |
topic_facet |
Geochemistry & Geophysics Mineralogy Re-Os geochronology Trace elements Magnetite Dissolution-reprecipitation Yamansu Fe deposit ASIAN OROGENIC BELT LA-ICP-MS MINERAL REPLACEMENT REACTIONS HYDROTHERMAL ORE-DEPOSITS TECTONIC EVOLUTION NORTHWESTERN CHINA IRON DEPOSIT KIRUNA-TYPE GEOLOGICAL IMPLICATIONS CONTINENTAL GROWTH |
description |
The Yamansu Fe deposit (32Mt at 51% Fe) in the Eastern Tianshan Orogenic Belt of NW China is hosted in early Carboniferous volcano-sedimentary rocks and spatially associated with skarn. The paragenetic sequence includes garnet-diopside (I), magnetite (II), hydrous silicate-sulfide (III), and calcite-quartz (IV) stages. Pyrite associated with magnetite has a Re-Os isochron age of 322 +/- 7Ma, which represents the timing of pyrite and, by inference, magnetite mineralization. Pyrite has S-34(VCDT) values of -2.2 to +2.9 parts per thousand, yielding S-34(H2S) values of -3.1 to 2 parts per thousand, indicating the derivation of sulfur from a magmatic source. Calcite from stages II and IV has C-13(VPDB) values from -2.5 to -1.2 parts per thousand, and -1.1 to 1.1 parts per thousand, and O-18(VSMOW) values from 11.8 to 12.0 parts per thousand and -7.7 to -5.2 parts per thousand, respectively. Calculated C-13 values of fluid CO2 and water O-18 values indicate that stage II hydrothermal fluids were derived from magmatic rocks and that meteoric water mixed with the hydrothermal fluids in stage IV. Some ores contain magnetite with obvious chemical zoning composed of dark and light domains in BSE images. Dark domains have higher Mg, Al, Ca, Mn, and Ti but lower Fe and Cr contents than light domains. The chemical zoning resulted from a fluctuating fluid composition and/or physicochemical conditions (oscillatory zoning), or dissolution-precipitation (irregular zoning) via infiltration of magmatic-hydrothermal fluids diluted by late meteoric water. Iron was mainly derived from fluids similar to that in skarn deposits. |
format |
Report |
author |
Huang, Xiao-Wen Zhou, Mei-Fu Beaudoin, Georges Gao, Jian-Feng Qi, Liang Lyu, Chuan |
author_facet |
Huang, Xiao-Wen Zhou, Mei-Fu Beaudoin, Georges Gao, Jian-Feng Qi, Liang Lyu, Chuan |
author_sort |
Huang, Xiao-Wen |
title |
Origin of the volcanic-hosted Yamansu Fe deposit, Eastern Tianshan, NW China: constraints from pyrite Re-Os isotopes, stable isotopes, and in situ magnetite trace elements |
title_short |
Origin of the volcanic-hosted Yamansu Fe deposit, Eastern Tianshan, NW China: constraints from pyrite Re-Os isotopes, stable isotopes, and in situ magnetite trace elements |
title_full |
Origin of the volcanic-hosted Yamansu Fe deposit, Eastern Tianshan, NW China: constraints from pyrite Re-Os isotopes, stable isotopes, and in situ magnetite trace elements |
title_fullStr |
Origin of the volcanic-hosted Yamansu Fe deposit, Eastern Tianshan, NW China: constraints from pyrite Re-Os isotopes, stable isotopes, and in situ magnetite trace elements |
title_full_unstemmed |
Origin of the volcanic-hosted Yamansu Fe deposit, Eastern Tianshan, NW China: constraints from pyrite Re-Os isotopes, stable isotopes, and in situ magnetite trace elements |
title_sort |
origin of the volcanic-hosted yamansu fe deposit, eastern tianshan, nw china: constraints from pyrite re-os isotopes, stable isotopes, and in situ magnetite trace elements |
publisher |
SPRINGER |
publishDate |
2018 |
url |
http://ir.gig.ac.cn/handle/344008/39776 https://doi.org/10.1007/s00126-018-0794-4 |
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Kiruna |
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Kiruna |
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Kiruna |
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Kiruna |
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MINERALIUM DEPOSITA http://ir.gig.ac.cn/handle/344008/39776 doi:10.1007/s00126-018-0794-4 |
op_doi |
https://doi.org/10.1007/s00126-018-0794-4 |
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