Geochemistry of abyssal peridotites from the super slow-spreading Southwest Indian Ridge near 65 degrees E: Implications for magma source and seawater alteration
文献类型：期刊论文
| 作者 | Zeng, Zhigang1; Wang, Qiaoyun1; Wang, Xiaomei1,2; Chen, Shuai1,2; Yin, Xuebo1; Li, Zhaoxue1 |
| 刊名 | JOURNAL OF EARTH SYSTEM SCIENCE
 |
| 出版日期 | 2012-10-01 |
| 卷号 | 121期号:5页码:1317-1336 |
| ISSN号 | 0253-4126 |
| 关键词 | Abyssal peridotite magma source seawater alteration Southwest Indian Ridge near 65 degrees E |
| 通讯作者 | Zeng, ZG (reprint author), Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Seafloor Hydrothermal Act Lab, Qingdao 266071, Peoples R China. |
| 英文摘要 | The geochemical characteristics of abyssal peridotite samples from one dredge station (27 degrees 49.74'S, 65 degrees 02.14'E, water depth 4473 m) on the super slow-spreading Southwest Indian Ridge (SWIR) near 65 degrees E were investigated. Abyssal peridotites recovered from this site were comprised mainly of lizardite, chlorite, carbonate and magnetite with minor amounts of talc, pyroxene phenocrysts and sparse olivines. Serpentinites exhibit talc veins and major serpentine derived from serpentinization with relict olivine granuloblasts. Olivine grains in serpentinites display exsolution lamellae, indicating the occurrence of talc reduction or decompression during seawater-rock interaction. Pyroxene shows clear cleavage in two directions, with clinopyroxene or orthopyroxene exsolution lamellae. By contrast, bulk rock trace element patterns of serpentinites reveal depletion in most incompatible elements, similarly to the depleted mid-ocean ridge basalt mantle composition, indicating that the SWIR peridotites originated from a depleted mantle source magma and have experienced partial melting. Meanwhile, Rb, Ba, U, Pb, Sr, Li anomalies and the Ce/Pb ratio suggest that these serpentinites have been strongly altered by seawater. |
| 学科主题 | Geosciences, Multidisciplinary ; Multidisciplinary Sciences |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000311002300015 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/12504]  |
| 专题 | 海洋研究所_海洋地质与环境重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Seafloor Hydrothermal Act Lab, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zeng, Zhigang,Wang, Qiaoyun,Wang, Xiaomei,et al. Geochemistry of abyssal peridotites from the super slow-spreading Southwest Indian Ridge near 65 degrees E: Implications for magma source and seawater alteration[J]. JOURNAL OF EARTH SYSTEM SCIENCE,2012,121(5):1317-1336. |
| APA | Zeng, Zhigang,Wang, Qiaoyun,Wang, Xiaomei,Chen, Shuai,Yin, Xuebo,&Li, Zhaoxue.(2012).Geochemistry of abyssal peridotites from the super slow-spreading Southwest Indian Ridge near 65 degrees E: Implications for magma source and seawater alteration.JOURNAL OF EARTH SYSTEM SCIENCE,121(5),1317-1336. |
| MLA | Zeng, Zhigang,et al."Geochemistry of abyssal peridotites from the super slow-spreading Southwest Indian Ridge near 65 degrees E: Implications for magma source and seawater alteration".JOURNAL OF EARTH SYSTEM SCIENCE 121.5(2012):1317-1336. |
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来源：海洋研究所
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