Temporal-spatial coincidence may not always discern causality: Insights from two skarn deposits in Anqing and Zhibula, China
文献类型：期刊论文
| 作者 | Li, Yi1,2; Li, Yang1; Wang, Chang-Ming2; Li, Xian-Hua1 |
| 刊名 | ORE GEOLOGY REVIEWS
 |
| 出版日期 | 2022-07-01 |
| 卷号 | 146页码:15 |
| 关键词 | Magmatic hydrothermal ore systems Causative intrusion Genetic link Garnet/zircon U-Pb Epidote/apatite Sr isotope |
| ISSN号 | 0169-1368 |
| DOI | 10.1016/j.oregeorev.2022.104951 |
| 英文摘要 | The genetic links between skarn deposits and their causative intrusions are often difficult to establish with in situ dating techniques since ultra-high temporal resolution is required (i.e., < 0.1%). Strontium isotope can be applied to further test their causality, because of its sensitivity to water-rock interaction and country-rock contamination. Here we demonstrated the effectiveness of this approach using two skarn deposits (Zhibula and Anqing) as an example. While in situ garnet/zircon U-Pb dating indicates contemporary intrusions for both deposits, but the genetic links between mineralization and intrusions are contested owing to the limited temporal resolution. We further tested these apparent genetic links via in situ Sr isotope discrimination between mineralization-related epidote and igneous apatite from hypothesized causative intrusions. For Zhibula, the U-Pb ages of garnet (17.0 +/- 0.4 Ma) and zircon (16.9 +/- 0.3 Ma) support an apparent genetic link between Cu mineralization and the Zhibula granodiorite. This observation has been further supported by the 87Sr/86Sr ratio of hydrothermal epidote (0.70657 +/- 0.00025), which can be interpreted by binary mixing between the grano-diorite (0.71136 +/- 0.00253) and the wall rock (Yeba formation; 0.70456 +/- 0.00118). For Anqing, the U-Pb ages of garnet (138.1 +/- 1.9 Ma) and zircon (137.1 +/- 1.3 Ma) also support an apparent genetic link between Cu-(Fe-Au) mineralization and the Yueshan diorite. However, the Sr-87/Sr-86 ratio (0.71468 +/- 0.00356) of hydrothermal epidote is too radiogenic to be explained by mixing between the Yueshan diorite (0.70654 +/- 0.00012) and the Triassic carbonates (0.70810 +/- 0.00015), which implies the presence of an unknown or unexposed causative intrusion. Our study highlights the risk of solely relying on in situ radiometric dating to establish genetic links between mineralization and spatial-related intrusions. Instead, integrating Sr isotopic fingerprinting with geochronology and deposit geology could be more informative. |
| WOS关键词 | PORPHYRY COPPER-DEPOSIT ; PLASMA-MASS SPECTROMETRY ; SR ISOTOPIC COMPOSITIONS ; YANGTZE-RIVER VALLEY ; U-PB ; GANGDESE BELT ; CU-AU ; FLUID EVOLUTION ; ANHUI PROVINCE ; ORE FORMATION |
| 资助项目 | National Natural Science Foundation of China[42022022] ; Pioneer Hundred Talents Program of Chinese Academy of Sciences ; Society of Economic Geologists |
| WOS研究方向 | Geology ; Mineralogy ; Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:000806788300001 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Pioneer Hundred Talents Program of Chinese Academy of Sciences ; Pioneer Hundred Talents Program of Chinese Academy of Sciences ; Pioneer Hundred Talents Program of Chinese Academy of Sciences ; Pioneer Hundred Talents Program of Chinese Academy of Sciences ; Society of Economic Geologists ; Society of Economic Geologists ; Society of Economic Geologists ; Society of Economic Geologists ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Pioneer Hundred Talents Program of Chinese Academy of Sciences ; Pioneer Hundred Talents Program of Chinese Academy of Sciences ; Pioneer Hundred Talents Program of Chinese Academy of Sciences ; Pioneer Hundred Talents Program of Chinese Academy of Sciences ; Society of Economic Geologists ; Society of Economic Geologists ; Society of Economic Geologists ; Society of Economic Geologists ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Pioneer Hundred Talents Program of Chinese Academy of Sciences ; Pioneer Hundred Talents Program of Chinese Academy of Sciences ; Pioneer Hundred Talents Program of Chinese Academy of Sciences ; Pioneer Hundred Talents Program of Chinese Academy of Sciences ; Society of Economic Geologists ; Society of Economic Geologists ; Society of Economic Geologists ; Society of Economic Geologists ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Pioneer Hundred Talents Program of Chinese Academy of Sciences ; Pioneer Hundred Talents Program of Chinese Academy of Sciences ; Pioneer Hundred Talents Program of Chinese Academy of Sciences ; Pioneer Hundred Talents Program of Chinese Academy of Sciences ; Society of Economic Geologists ; Society of Economic Geologists ; Society of Economic Geologists ; Society of Economic Geologists |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/106063]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Li, Yang |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Yi,Li, Yang,Wang, Chang-Ming,et al. Temporal-spatial coincidence may not always discern causality: Insights from two skarn deposits in Anqing and Zhibula, China[J]. ORE GEOLOGY REVIEWS,2022,146:15. |
| APA | Li, Yi,Li, Yang,Wang, Chang-Ming,&Li, Xian-Hua.(2022).Temporal-spatial coincidence may not always discern causality: Insights from two skarn deposits in Anqing and Zhibula, China.ORE GEOLOGY REVIEWS,146,15. |
| MLA | Li, Yi,et al."Temporal-spatial coincidence may not always discern causality: Insights from two skarn deposits in Anqing and Zhibula, China".ORE GEOLOGY REVIEWS 146(2022):15. |
入库方式： OAI收割
来源：地质与地球物理研究所
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