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| Iron Isotope Behavior During Melt-Peridotite Interaction in Supra-subduction Zone Ophiolite From Northern Tibet | |
Zhang, Long1; Sun, Wei-dong2,3 ; Zhang, Zhao-Feng1; An, Yajun1; Liu, Fang1
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| 2020-02-01 | |
| 发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
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| ISSN | 2169-9313 |
| 卷号 | 125期号:2页码:17 |
| 通讯作者 | Zhang, Long([email protected]) ; Sun, Wei-dong([email protected]) |
| 摘要 | Melt-peridotite interaction has the ability to modify the delta Fe-56 of peridotite. However, iron isotopic fractionation during melt-peridotitc interaction is not well understood at present. In this study, we present high-precision iron isotopic data for serpentinized and carbonated peridotite from the Yushigou supra-subduction zone ophiolite in the North Qilian orogen of northern Tibet, to provide insights into iron isotope behavior during melt-peridotite interaction in the mantle wedge. High-Cr and high-Al dunites coexist with harzburgitc in the Yushigou ophiolite. The high-Cr and high-Al dunites were produced by interaction of peridotite with boninitic melt and tholeiitic melt, respectively. Serpentinization and carbonation have negligible influence on delta Fe-56 of the peridotite. The harzburgite mostly has delta Fe-56 ranging from 0.055 +/- 0.029 parts per thousand to 0.056 +/- 0.030 parts per thousand, which overlaps with delta Fe-56 of abyssal peridotite. The high-Al dunite is enriched in FcO, but it has delta Fe-56 (0.004 +/- 0.034 parts per thousand-0.083 +/- 0.064 parts per thousand) similar to the harzburgitc. In contrast, the high-Cr dunite displays a large range in delta Fe-56 from -0.173 +/- 0.017 parts per thousand, to 0.173 +/- 0.057 parts per thousand. Moreover, delta Fe-56 of the high-Cr dunite is negatively correlated with its FeO content, which is ascribed to kinetic iron isotopic fractionation during melt-peridotite interaction. Surprisingly, distinct iron isotope behavior during melt-peridotitc interaction recorded by the Yushigou peridotitc can well explain the large variation of FeO and delta Fe-56 in abyssal peridotite and mantle wedge peridotite on a global scale. |
| DOI | 10.1029/2019JB018823 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | Strategic Priority Research Program of the Chinese Academy of Sciences[XDB18000000]; National Key R&D Program of China[2016YFC0600408]; Natural Science Foundation of China[41703029]; China Postdoctoral Science Foundation[2016LH00023] |
| WOS研究方向 | Geochemistry & Geophysics |
| WOS类目 | Geochemistry & Geophysics |
| WOS记录号 | WOS:000530895200017 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/167383 |
| 专题 | 深海极端环境与生命过程研究中心 |
| 通讯作者 | Zhang, Long; Sun, Wei-dong |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao, Peoples R China 3.Chinese Acad Sci, Ctr Deep Sea Res, Inst Oceanol, Qingdao, Peoples R China |
| 通讯作者单位 | 中国科学院海洋研究所 |
| 推荐引用方式 GB/T 7714 | Zhang, Long,Sun, Wei-dong,Zhang, Zhao-Feng,et al. Iron Isotope Behavior During Melt-Peridotite Interaction in Supra-subduction Zone Ophiolite From Northern Tibet[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2020,125(2):17. |
| APA | Zhang, Long,Sun, Wei-dong,Zhang, Zhao-Feng,An, Yajun,&Liu, Fang.(2020).Iron Isotope Behavior During Melt-Peridotite Interaction in Supra-subduction Zone Ophiolite From Northern Tibet.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,125(2),17. |
| MLA | Zhang, Long,et al."Iron Isotope Behavior During Melt-Peridotite Interaction in Supra-subduction Zone Ophiolite From Northern Tibet".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 125.2(2020):17. |
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| 2019JB018823.pdf（57808KB） | 期刊论文 | 出版稿 | 限制开放 | CC BY-NC-SA | 浏览 | |
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