Inherited source affinity of Li and Hf isotopes for porphyry copper deposits from subduction and collisional settings
文献类型：期刊论文
| 作者 | Lu, Yigan1; Xiao, Yilin1,2; Nadeau, Olivier3; Yang, Xiaoyong1,2; Wang, Yangyang1; Hou, Zhenhui1,2; Sun, He4; Li, Dongyong1; Gu, Haiou4; Deng, Jianghong5 |
| 刊名 | ORE GEOLOGY REVIEWS
 |
| 出版日期 | 2021-11-01 |
| 卷号 | 138页码:21 |
| ISSN号 | 0169-1368 |
| 关键词 | Porphyry deposits Oceanic subduction Continental collision Li isotopes Hf isotopes |
| DOI | 10.1016/j.oregeorev.2021.104328 |
| 通讯作者 | Xiao, Yilin(ylxiao@ustc.edu.cn) |
| 英文摘要 | Porphyry Cu deposits can be classified at the global scale as oceanic subduction-and continental collision-types based on their tectonomagmatic settings. In order to further characterize the possible differences in the geochemical and isotopic features of these two types of porphyry Cu deposits, Li-Hf isotopes were investigated together with bulk rock major/trace element concentrations and geochronology, for porphyritic granitoids related with four porphyry Cu deposits. The Baogutu porphyry Cu-Au deposit, Xinjiang Province, China, and the Atlas porphyry Cu-Au deposit, Philippines, are taken to represent the oceanic subduction-type, whereas the Demingding porphyry Cu-Mo deposit, Tibet Province, China, and the Grasberg porphyry Au-Cu deposit, Indonesia, are taken as proxies for the continental collision-type. The Li isotopic compositions of the Baogutu granodiorite shows a limited range of + 3.2 to + 6.5%o (avg. + 4.6 +/- 1.7%o, n = 13) in delta Li-7 values, whereas the diorite from Atlas have delta Li-7 values of + 2.6 to + 7.7 parts per thousand (avg. + 5.9 +/- 2.8 parts per thousand, n = 16), i.e., slightly higher than the Baogutu granodiorites, probably reflecting the involvement of subducted marine sediments. The relatively homogeneous and MORB-like delta Li-7 values (-+3 to 5 parts per thousand) of the Baogutu and Atlas porphyries, together with depleted zircon eHf(t) values for Baogutu (+11.8 to + 17.5, avg. + 14.5, n = 19) and Atlas (+7.1 to + 10.6, avg. + 9.0, n = 40), are suggestive of an affinity with oceanic plate, and/or partial melting of the mantle wedge in response to oceanic subduction. By contrast, the delta Li-7 values of the Demingding monzogranite and quartz porphyry, and the Grasberg quartz monzodiorite vary more broadly, ranging from-0.7 parts per thousand to + 10.3 parts per thousand (avg. + 2.5 +/- 5.9 parts per thousand, n = 19) and from-0.3 to + 7.3 parts per thousand (avg. + 3.7 +/- 4.6 parts per thousand, n = 8), respectively. These two localities also show variable zircon eHf(t) values ranging from-5.4 to + 5.7 (avg. + 2.8, n = 20) and from-20.0 to-1.0 (avg.-10.7, n = 42), respectively. The large variations of delta Li-7 and eHf(t) values at Demingding and Grasberg are generally similar to those of mid-to lower continental crust (delta Li-7 -+3.3 parts per thousand and epsilon(Hf)(t)-20.0 to + 5.7), and are thus consistent with their source regions, which are interpreted to reflect continental collisional settings. The Li-Hf isotopic compositions of the four porphyry intrusions show that tectonic settings have dominant effects on the Li-Hf isotopic compositions of the related magmatic rocks, prior to any redistribution by porphyry Cu deposits-related hydrothermal alterations, suggesting that Li-Hf isotopes systematics can partly act as tracers of the source regions related to tectonic settings. |
| 资助项目 | Strategic Priority Research Program (B) of CAS[XDB18000000] ; Strategic Priority Research Program (B) of CAS[41000000] ; State Key Laboratory of Ore Deposit Geochemistry open funds[201608] ; National Natural Science Foundation of China[41729001] ; National Natural Science Foundation of China[42073003] |
| WOS研究方向 | Geology ; Mineralogy ; Mining & Mineral Processing |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000700112100001 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/176559]  |
| 专题 | 海洋研究所_深海极端环境与生命过程研究中心 |
| 通讯作者 | Xiao, Yilin |
| 作者单位 | 1.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Peoples R China 2.CAS Ctr Excellence Comparat Planetol, Hefei 230026, Peoples R China 3.China Univ Geosci, Sch Earth Resources, Dept Mineral Resources & Engn, Lab Isotopes Econ Geol & Its Environm Liege, Lumo Lu 388, Wuhan 430074, Hubei, Peoples R China 4.Hefei Univ Technol, Sch Resources & Environm Engn, Hefei 230009, Peoples R China 5.Chinese Acad Sci, Ctr Deep Sea Res, Ctr Ocean Megasci, Inst Oceanol, Qingdao 266071, Peoples R China 6.Gombe State Univ, Dept Geol, PMB 127, Gombe, Gombe State, Nigeria |
| 推荐引用方式 GB/T 7714 | Lu, Yigan,Xiao, Yilin,Nadeau, Olivier,et al. Inherited source affinity of Li and Hf isotopes for porphyry copper deposits from subduction and collisional settings[J]. ORE GEOLOGY REVIEWS,2021,138:21. |
| APA | Lu, Yigan.,Xiao, Yilin.,Nadeau, Olivier.,Yang, Xiaoyong.,Wang, Yangyang.,...&Bute, Saleh Ibrahim.(2021).Inherited source affinity of Li and Hf isotopes for porphyry copper deposits from subduction and collisional settings.ORE GEOLOGY REVIEWS,138,21. |
| MLA | Lu, Yigan,et al."Inherited source affinity of Li and Hf isotopes for porphyry copper deposits from subduction and collisional settings".ORE GEOLOGY REVIEWS 138(2021):21. |
入库方式： OAI收割
来源：海洋研究所
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