Miocene porphyry copper deposits in the Eastern Tethyan orogenic belt: Using Sr, O isotopes and Sr/Y ratios to predict the source of ore-related and ore-barren magmas
文献类型：期刊论文
| 作者 | Deng, Chen1,2; Wan, Bo1,2,3; Dong, Leilei1; Talebian, Morteza4; Windley, Brian F.5; Dadashzadeh, Hooman4; Mohammadi, Behzad4; Barati, Behzad4 |
| 刊名 | GONDWANA RESEARCH
 |
| 出版日期 | 2018-10-01 |
| 卷号 | 62页码:14-26 |
| 关键词 | Sr, O isotopes Sr/Y ratios Deep crustal hot zone model Eastern Tethyan belt Urumieh-Dokhtar magmatic arc |
| ISSN号 | 1342-937X |
| DOI | 10.1016/j.gr.2018.03.007 |
| 英文摘要 | There are many Miocene collision- and subduction-related porphyry Cu deposits in the Eastern Tethyan orogenic belt. However, the petrogenesis of the ore-related magmas and the mechanism of metal enrichment remain controversial. Here, we present a geochemical study and comparison of the major Miocene ore-related porphyries and coeval ore-barren magmatic rocks in the Urumieh-Dokhtar magmatic arc in Iran and the Chagai belt in Pakistan, and the Eastern Gangdese belt of the Himalaya. The results show that ore-related porphyries are characterized by relatively depleted mean Sr isotopic compositions (0.704217-0.706859 in the Urumieh-Dokhtar magmatic arc; 0.705052-0.706588 in the Eastern Gangdese belt; 0.705252-0.706708 in the Chagai belt), but higher maximum Sr/Y ratios (40-149 in Urumieh-Dokhtar; 79-178 in Eastern Gangdese; 52-178 in Chagai). In contrast, the coeval ore-barren magmatic rocks yield relatively enriched, mean Sr isotopic compositions (0.704722-0.707653 in Urumieh-Dokhtar; 0.704701-0.707802 in Eastern Gangdese; 0.705982-0.707856 in Chagai), but lower maximum Sr/Y (2-88 in Urumieh-Dokhtar; 61-136 in Eastern Gangdese; and 19-35 in Chagai). A deep crustal hot zone model provides a robust explanation of these data. Melts derived from a deeper melt source in juvenile mafic lower crust, where mantle-derived materials are common, have a greater potential to yield a higher tonnage of metallic Cu, such as the Sar-Cheshmeh deposit in Iran, which is derived from a deep melt zone, and characterized by a low radioactive mean Sr isotopic value of 0.704851, but a huge tonnage of metallic Cu of 7.2 Mt and a high maximum Sr/Y value of 117 (representative of a deeper depth of the melt zone), whereas the Dalli deposit in Iran derived from a relatively shallow melt zone has a more radioactive mean Sr isotopic value of 0.706859, but a smaller amount of metallic Cu of 0.04 Mt and a lower maximum Sr/Y ratio of 40. Conversely, re-melting the contact between newly-formed and pre-existing crust where mantle-derived materials are absent will produce ore-barren rocks. Additionally, the ore-barren rocks with low Sr/Y ratios (<20) should be derived from a shallower melt zone in the crust. (C) 2018 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved. |
| WOS关键词 | ZIRCON U-PB ; ARABIA-EURASIA COLLISION ; CONTINENTAL-CRUST ; IRAN IMPLICATIONS ; GEODYNAMIC EVOLUTION ; CU MINERALIZATION ; WORKING REFERENCE ; VOLCANIC-ROCKS ; SOUTH TIBET ; ARC MAGMAS |
| 资助项目 | CAS[GJHZ1776] ; CAS[2013047] ; NSF of China[41380945] ; NSF of China[41672085] ; NSF of China[41320104004] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000454185200003 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | CAS ; CAS ; CAS ; CAS ; NSF of China ; NSF of China ; NSF of China ; NSF of China ; CAS ; CAS ; CAS ; CAS ; NSF of China ; NSF of China ; NSF of China ; NSF of China ; CAS ; CAS ; CAS ; CAS ; NSF of China ; NSF of China ; NSF of China ; NSF of China ; CAS ; CAS ; CAS ; CAS ; NSF of China ; NSF of China ; NSF of China ; NSF of China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/90247]  |
| 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 | Wan, Bo |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China 4.Geol Survey Iran, Azadi Sq,Meraj Blvd, Tehran, Iran 5.Univ Leicester, Dept Geol, Leicester LE1 7RH, Leics, England |
| 推荐引用方式 GB/T 7714 | Deng, Chen,Wan, Bo,Dong, Leilei,et al. Miocene porphyry copper deposits in the Eastern Tethyan orogenic belt: Using Sr, O isotopes and Sr/Y ratios to predict the source of ore-related and ore-barren magmas[J]. GONDWANA RESEARCH,2018,62:14-26. |
| APA | Deng, Chen.,Wan, Bo.,Dong, Leilei.,Talebian, Morteza.,Windley, Brian F..,...&Barati, Behzad.(2018).Miocene porphyry copper deposits in the Eastern Tethyan orogenic belt: Using Sr, O isotopes and Sr/Y ratios to predict the source of ore-related and ore-barren magmas.GONDWANA RESEARCH,62,14-26. |
| MLA | Deng, Chen,et al."Miocene porphyry copper deposits in the Eastern Tethyan orogenic belt: Using Sr, O isotopes and Sr/Y ratios to predict the source of ore-related and ore-barren magmas".GONDWANA RESEARCH 62(2018):14-26. |
入库方式： OAI收割
来源：地质与地球物理研究所
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