Genesis of the low sulfide-high-grade PGE mineralization in the W Horizon, Coldwell Complex, Canada: quantitative modeling for PGE reef-style mineralization in syn-magmatic sills
发布时间：2021-12-17点击次数：
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影响因子：5.109
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发表刊物：Mineralium Deposita
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关键字：Midcontinent Rift . Coldwell Complex . Syn-magmatic sill . PGEmineralization . Marathon deposit
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摘要：The W Horizon is a thin continuous zone of low sulfide-high-grade platinum group element (PGE) mineralization in the Two Duck Lake gabbro at theMarathon Cu-PGE deposit, Coldwell Complex, Canada, that resembles reef-type PGE deposits found in much larger intrusions. The Marathon deposit was previously shown to have grown by accretion of syn-magmatic, sulfide- bearing sill-like intrusions that formed each of the W Horizon, Main Zone, and Lower Zone mineralization. Each zone can be distinguished by features such as sulfide mineral or platinum group mineral assemblages, or by Cu/Pd, Pd/Se, and Pd/Au values. For example, the WHorizon is defined by the presence ofbornite, very high PGE values, low Cu/Pd (< 1000), and high Pd/Au (34 ± 32), whereas the Main Zone and Lower Zone types are characterized by mantle-like Cu/Pd (1000 to 10,000), and Pd/Au of 10.3 ± 4.7. Model calculations based onKerr-Leitch multistage dissolution upgrading show that PGE enrichment and decoupling ofPGE from Au and chalcophile elements in the W Horizon can be related to progressive upgrading and recycling of sulfide liquid by successive pulses ofsilicate magma. For the WHorizon, extreme PGE enrichment can be explained by the interaction ofa sulfide liquid with up to 25 pulses ofmagma and simultaneous sulfide liquid dissolution resulting in a loss of> 95% ofthe original sulfide liquid. In some samples, metal and S abundances indicate that PGEwere transported as TABS-PGE phases. This work describes an example of thin PGE-rich sill-like injections that could be ofimportance to PGE exploration elsewhere.
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合写作者：Iain Samson, Robert Linnen, David Good
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第一作者：Yonghua Cao
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论文类型：期刊论文
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学科门类：理学
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一级学科：地质学
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文献类型：J
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卷号：56
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期号：6
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页面范围：1151-1176
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是否译文：否
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发表时间：2021-01-05
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收录刊物：SCI
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发布期刊链接：https://doi.org/10.1007/s00126-020-01033-0
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曹勇华
个人信息
- 副研究员
博士生导师
硕士生导师 - 教师英文名称：Yonghua Cao
- 教师拼音名称：caoyonghua
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- 入职时间：2021-09-01
- 所在单位：地球科学与信息物理学院
- 学历：研究生(博士)毕业
- 办公地点：地信楼407
- 性别：男
- 学位：博士学位
- 职称：副研究员
- 在职信息：在职
- 毕业院校：The University of Western Ontario
曾获荣誉：
- 中南大学‘升华学者’
- 广东省'珠江人才’
- 第四届全国大学青年教师地质课程教学比赛一等奖
- 中南大学本科生课堂教学质量优秀奖（2024-2025）
- 中南大学本科生课堂教学质量优秀奖（2023-2024）
- 中南大学研究生教学质量优秀奖（2024-2025）
- 中南大学优秀本科毕业设计（二等奖）指导老师
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