Ancient Refertilization Process Preserved in the Plagioclase Peridotites: An Example From the Shuanggou Ophiolite, Southwest China
文献类型：期刊论文
| 作者 | Hu, Wen-Jun2,3; Zhong, Hong1,2; Chu, Zhu-Yin4; Zhu, Wei-Guang2; Bai, Zhong-Jie2; Zhang, Chang4
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| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
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| 出版日期 | 2020 |
| 卷号 | 125期号:1页码:21 |
| 关键词 | Shuanggou ophiolite mantle refertilization platinum group elements Re-Os isotopes |
| ISSN号 | 2169-9313 |
| DOI | 10.1029/2019JB017552 |
| 英文摘要 | Petrology, geochemistry, platinum group elements (PGEs: Os, Ir, Ru, Rh, Pt, and Pd), and Re-Os isotope data of harzburgites and plagioclase lherzolites from the Shuanggou ophiolite (southwest China) are presented in this study, in order to determine whether ancient refertilization process can be preserved in ophiolitic plagioclase peridotites. The harzburgites in the Shuanggou ophiolite are divided into two groups: (1) the Group-1 harzburgites have Os-187/Os-188 ratios (0.12297-0.12727) and PGE abundances similar to those of oceanic peridotites, thereby representing the convecting upper mantle; (2) the Group-2 harzburgites have extremely low Os-187/Os-188 ratios (0.11307-0.11651) with considerable fractionation in iridium group PGEs (Os, Ir, and Ru), indicative of an ancient refractory mantle in the oceanic lithosphere. The plagioclase lherzolites were formed by melt impregnation of the Group-2 harzburgites, according to the PGE compositions and the petrographic features. However, the large Os isotope difference between the lherzolites (Os-187/Os-188: 0.12470-0.12666) and the Group-2 harzburgites indicates that the refertilization process took place much earlier than the exhumation of the mantle at 0.4 Ga. In addition, clinopyroxene composition suggests that the percolating melt is different from the Shuanggou diabases and typical mid-ocean ridge basalts. This study therefore demonstrates that some plagioclase lherzolites possibly were not related to mantle exhumation beneath the spreading center but formed by much older melt impregnation processes in the mantle instead. |
| WOS关键词 | PLATINUM-GROUP ELEMENTS ; HIGHLY SIDEROPHILE ELEMENTS ; RE-OS ISOTOPES ; LITHOSPHERIC MANTLE BENEATH ; ARC/BACK-ARC ASSEMBLAGES ; PLATE TECTONIC CYCLE ; PALEO-TETHYS OROGEN ; RIVER SHEAR ZONE ; ABYSSAL PERIDOTITES ; SIBERIAN CRATON |
| 资助项目 | National Natural Science Foundation of China[41425011] ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences[XDB18000000] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000530895100007 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/96724]  |
| 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 | Zhong, Hong |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang, Peoples R China 3.Univ Hong Kong, Dept Earth Sci, Hong Kong, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu, Wen-Jun,Zhong, Hong,Chu, Zhu-Yin,et al. Ancient Refertilization Process Preserved in the Plagioclase Peridotites: An Example From the Shuanggou Ophiolite, Southwest China[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2020,125(1):21. |
| APA | Hu, Wen-Jun,Zhong, Hong,Chu, Zhu-Yin,Zhu, Wei-Guang,Bai, Zhong-Jie,&Zhang, Chang.(2020).Ancient Refertilization Process Preserved in the Plagioclase Peridotites: An Example From the Shuanggou Ophiolite, Southwest China.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,125(1),21. |
| MLA | Hu, Wen-Jun,et al."Ancient Refertilization Process Preserved in the Plagioclase Peridotites: An Example From the Shuanggou Ophiolite, Southwest China".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 125.1(2020):21. |
入库方式： OAI收割
来源：地质与地球物理研究所
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