Re-Os pyrite geochronology of Zn-Pb mineralization in the giant Caixiashan deposit, NW China
The newly discovered Caixiashan Irish-type Zn-Pb deposit (similar to 131 Mt at 3.95 % Zn + Pb), located in the Eastern Tianshan of Xinjiang, is one of the largest Zn-Pb deposits in NW China. Massive colloform/framboidal textured syn-sedimentary pyrite yielded a Re-Os isochron age of 1019 +/- 70 Ma (...
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ftchacadscgigcas:oai:ir.gig.ac.cn:344008/55112 2023-05-15T15:46:59+02:00 Re-Os pyrite geochronology of Zn-Pb mineralization in the giant Caixiashan deposit, NW China Li, Dengfeng Chen, Huayong Hollings, Pete Zhang, Li Mi, Mei Li, Jie Fang, Jing Wang, Chengming Lu, Wanjian 2016-03-01 http://ir.gig.ac.cn/handle/344008/55112 https://doi.org/10.1007/s00126-016-0637-0 英语 eng SPRINGER MINERALIUM DEPOSITA http://ir.gig.ac.cn/handle/344008/55112 doi:10.1007/s00126-016-0637-0 Geochemistry & Geophysics Mineralogy Pyrite Re-Os Irish-type Pb-Zn deposit Caixiashan Eastern Tianshan BROOKS RANGE TARIM BASIN ZIRCON GEOCHRONOLOGY NORTHWEST CHINA VOLCANIC-ROCKS BLACK SHALES CENTRAL-ASIA ORE FIELD SYSTEMATICS MOLYBDENITE 期刊论文 2016 ftchacadscgigcas https://doi.org/10.1007/s00126-016-0637-0 2022-03-27T20:32:07Z The newly discovered Caixiashan Irish-type Zn-Pb deposit (similar to 131 Mt at 3.95 % Zn + Pb), located in the Eastern Tianshan of Xinjiang, is one of the largest Zn-Pb deposits in NW China. Massive colloform/framboidal textured syn-sedimentary pyrite yielded a Re-Os isochron age of 1019 +/- 70 Ma (MSWD = 3.5), which is interpreted to be the depositional age of the Kawabulake group that hosts the ore. The age of the main mineralization stage is constrained by two types of pyrite: the layered pyrite coexists with recrystallized calcite and dolomite and is locally replaced by sphalerite, whereas the euhedral pyrite occurs with galena that crosscuts the massive sphalerite. The layered pyrite yielded a Re-Os age of 859 +/- 79 Ma (MSWD = 6.7; initial Os-187/Os-188 ratio [I-Os] = 0.19 +/- 0.25) and the euhedral pyrite 837 +/- 39 Ma (MSWD = 6.5; [I-Os] = 0.16 +/- 0.09), which are interpreted to be the Zn and Pb mineralization ages, respectively. The low radiogenic initial Os values of the Zn-Pb mineralization suggest interaction between a hydrothermal fluid and a mafic or ultramafic source rock with a mantle Os signature with some contamination with Mesoproterozoic Kawabulake group. Based on our new Re-Os ages, we conclude that the giant Caixiashan Zn-Pb deposit formed in the early Neoproterozoic and it represents a newly identified mineralization epoch in the Eastern Tianshan of the Central Asia Orogenic Belt. Report Brooks Range Guangzhou Institute of Geochemistry: GIG OpenIR (Chinese Academy of Sciences) Mineralium Deposita 51 3 309 317 |
institution |
Open Polar |
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Guangzhou Institute of Geochemistry: GIG OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchacadscgigcas |
language |
English |
topic |
Geochemistry & Geophysics Mineralogy Pyrite Re-Os Irish-type Pb-Zn deposit Caixiashan Eastern Tianshan BROOKS RANGE TARIM BASIN ZIRCON GEOCHRONOLOGY NORTHWEST CHINA VOLCANIC-ROCKS BLACK SHALES CENTRAL-ASIA ORE FIELD SYSTEMATICS MOLYBDENITE |
spellingShingle |
Geochemistry & Geophysics Mineralogy Pyrite Re-Os Irish-type Pb-Zn deposit Caixiashan Eastern Tianshan BROOKS RANGE TARIM BASIN ZIRCON GEOCHRONOLOGY NORTHWEST CHINA VOLCANIC-ROCKS BLACK SHALES CENTRAL-ASIA ORE FIELD SYSTEMATICS MOLYBDENITE Li, Dengfeng Chen, Huayong Hollings, Pete Zhang, Li Mi, Mei Li, Jie Fang, Jing Wang, Chengming Lu, Wanjian Re-Os pyrite geochronology of Zn-Pb mineralization in the giant Caixiashan deposit, NW China |
topic_facet |
Geochemistry & Geophysics Mineralogy Pyrite Re-Os Irish-type Pb-Zn deposit Caixiashan Eastern Tianshan BROOKS RANGE TARIM BASIN ZIRCON GEOCHRONOLOGY NORTHWEST CHINA VOLCANIC-ROCKS BLACK SHALES CENTRAL-ASIA ORE FIELD SYSTEMATICS MOLYBDENITE |
description |
The newly discovered Caixiashan Irish-type Zn-Pb deposit (similar to 131 Mt at 3.95 % Zn + Pb), located in the Eastern Tianshan of Xinjiang, is one of the largest Zn-Pb deposits in NW China. Massive colloform/framboidal textured syn-sedimentary pyrite yielded a Re-Os isochron age of 1019 +/- 70 Ma (MSWD = 3.5), which is interpreted to be the depositional age of the Kawabulake group that hosts the ore. The age of the main mineralization stage is constrained by two types of pyrite: the layered pyrite coexists with recrystallized calcite and dolomite and is locally replaced by sphalerite, whereas the euhedral pyrite occurs with galena that crosscuts the massive sphalerite. The layered pyrite yielded a Re-Os age of 859 +/- 79 Ma (MSWD = 6.7; initial Os-187/Os-188 ratio [I-Os] = 0.19 +/- 0.25) and the euhedral pyrite 837 +/- 39 Ma (MSWD = 6.5; [I-Os] = 0.16 +/- 0.09), which are interpreted to be the Zn and Pb mineralization ages, respectively. The low radiogenic initial Os values of the Zn-Pb mineralization suggest interaction between a hydrothermal fluid and a mafic or ultramafic source rock with a mantle Os signature with some contamination with Mesoproterozoic Kawabulake group. Based on our new Re-Os ages, we conclude that the giant Caixiashan Zn-Pb deposit formed in the early Neoproterozoic and it represents a newly identified mineralization epoch in the Eastern Tianshan of the Central Asia Orogenic Belt. |
format |
Report |
author |
Li, Dengfeng Chen, Huayong Hollings, Pete Zhang, Li Mi, Mei Li, Jie Fang, Jing Wang, Chengming Lu, Wanjian |
author_facet |
Li, Dengfeng Chen, Huayong Hollings, Pete Zhang, Li Mi, Mei Li, Jie Fang, Jing Wang, Chengming Lu, Wanjian |
author_sort |
Li, Dengfeng |
title |
Re-Os pyrite geochronology of Zn-Pb mineralization in the giant Caixiashan deposit, NW China |
title_short |
Re-Os pyrite geochronology of Zn-Pb mineralization in the giant Caixiashan deposit, NW China |
title_full |
Re-Os pyrite geochronology of Zn-Pb mineralization in the giant Caixiashan deposit, NW China |
title_fullStr |
Re-Os pyrite geochronology of Zn-Pb mineralization in the giant Caixiashan deposit, NW China |
title_full_unstemmed |
Re-Os pyrite geochronology of Zn-Pb mineralization in the giant Caixiashan deposit, NW China |
title_sort |
re-os pyrite geochronology of zn-pb mineralization in the giant caixiashan deposit, nw china |
publisher |
SPRINGER |
publishDate |
2016 |
url |
http://ir.gig.ac.cn/handle/344008/55112 https://doi.org/10.1007/s00126-016-0637-0 |
genre |
Brooks Range |
genre_facet |
Brooks Range |
op_relation |
MINERALIUM DEPOSITA http://ir.gig.ac.cn/handle/344008/55112 doi:10.1007/s00126-016-0637-0 |
op_doi |
https://doi.org/10.1007/s00126-016-0637-0 |
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Mineralium Deposita |
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51 |
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3 |
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309 |
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317 |
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1766381798749634560 |