Multi-stage melt impregnation and magma-seawater interaction in a slow-spreading oceanic lithosphere: constraints from cumulates in the Lagkorco ophiolite (central Tibet)
文献类型：期刊论文
| 作者 | Zhang, Wei-Qi1,3; Liu, Chuan-Zhou1,2,3; Liu, Tong3; Zhang, Chang3 ; Zhang, Zhen-Yu1,3; Li, Xiao-Ni1,3; Zhang, Zhen1,3; Lin, Yin-Zheng1,3
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| 刊名 | CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
 |
| 出版日期 | 2022-11-01 |
| 卷号 | 177期号:11页码:27 |
| 关键词 | Slow-spreading ridges Melt impregnation Oceanic crustal accretion Ophiolite Troctolite |
| ISSN号 | 0010-7999 |
| DOI | 10.1007/s00410-022-01976-9 |
| 英文摘要 | Although seismic and hydrothermal data show evidence of magma-seawater interaction in slow spreading-rate ridges, such a process has been rarely observed in situ in lower oceanic crust. In this study, we reported petrological and mineral data on the plutonic rocks from the lower oceanic crust of the Lagkorco ophiolite from central Tibet, which shows geological and petrological features indicative of a slow-spreading ridge origin. Both troctolites and gabbros were derived from depleted magmas containing 0.5-1.0 wt.% H2O. Petrology and geochemistry indicate that troctolites have experienced two stages of melt impregnation: (1) early, water-poor melt impregnation in a dunitic matrix and (2) late, hydrous melt impregnation in a troctolitic matrix. Stage (1) generated oikocrysts of clinopyroxene and plagioclase within an olivine-rich matrix, while stage (2) formed brown amphibole. The high Cl (up to 0.25 wt%) contents of the brown amphibole and the fast cooling of the troctolites (similar to 0.1 degrees C/year) suggest that stage (2) melt impregnation was associated with the hydration of the intercumulus melts by seawater infiltration. Together with the strong arc affinities of basalts, we suggest that Lagkorco ophiolite was formed at a nascent, slow-spreading back-arc basin with a fault-controlled crustal accretion. The deep-rooted faults may provide the channels for the downward seawater infiltration into the hot, impregnation zone near the crust-mantle transition zone. This study provides an example of seawater-magma interaction in the nascent back-arc lower oceanic crust with implications for the interplay among tectonic, hydrothermal, and magmatic processes at the slow-spreading ridges. |
| WOS关键词 | ZIRCON U-PB ; BACK-ARC BASIN ; TRACE-ELEMENT ; PHASE-EQUILIBRIA ; OXYGEN FUGACITY ; NUJIANG SUTURE ; OMAN OPHIOLITE ; COOLING RATES ; ROCK REACTION ; LOWER CRUST |
| 资助项目 | National Science Fund for Distinguished Young Scholars[42025201] ; National Key Research and Development Project of China[2020YFA0714801] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42020301] ; China Postdoctoral Science Foundation[2021M703197] |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:000884288700001 |
| 出版者 | SPRINGER |
| 资助机构 | National Science Fund for Distinguished Young Scholars ; National Science Fund for Distinguished Young Scholars ; National Science Fund for Distinguished Young Scholars ; National Science Fund for Distinguished Young Scholars ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Science Fund for Distinguished Young Scholars ; National Science Fund for Distinguished Young Scholars ; National Science Fund for Distinguished Young Scholars ; National Science Fund for Distinguished Young Scholars ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Science Fund for Distinguished Young Scholars ; National Science Fund for Distinguished Young Scholars ; National Science Fund for Distinguished Young Scholars ; National Science Fund for Distinguished Young Scholars ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Science Fund for Distinguished Young Scholars ; National Science Fund for Distinguished Young Scholars ; National Science Fund for Distinguished Young Scholars ; National Science Fund for Distinguished Young Scholars ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/107692]  |
| 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 | Liu, Chuan-Zhou |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Wei-Qi,Liu, Chuan-Zhou,Liu, Tong,et al. Multi-stage melt impregnation and magma-seawater interaction in a slow-spreading oceanic lithosphere: constraints from cumulates in the Lagkorco ophiolite (central Tibet)[J]. CONTRIBUTIONS TO MINERALOGY AND PETROLOGY,2022,177(11):27. |
| APA | Zhang, Wei-Qi.,Liu, Chuan-Zhou.,Liu, Tong.,Zhang, Chang.,Zhang, Zhen-Yu.,...&Lin, Yin-Zheng.(2022).Multi-stage melt impregnation and magma-seawater interaction in a slow-spreading oceanic lithosphere: constraints from cumulates in the Lagkorco ophiolite (central Tibet).CONTRIBUTIONS TO MINERALOGY AND PETROLOGY,177(11),27. |
| MLA | Zhang, Wei-Qi,et al."Multi-stage melt impregnation and magma-seawater interaction in a slow-spreading oceanic lithosphere: constraints from cumulates in the Lagkorco ophiolite (central Tibet)".CONTRIBUTIONS TO MINERALOGY AND PETROLOGY 177.11(2022):27. |
入库方式： OAI收割
来源：地质与地球物理研究所
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