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Amphibole as a witness of chromitite formation and fluid metasomatism in ophiolites

文献类型：期刊论文

作者Pan, Qi-Qi1,6,7; Xiao, Yan6,7; Su, Ben-Xun1,4,6; Liu, Xia1,4,6; Robinson, Paul T.4; Uysal, Ibrahim5; Zhang, Peng-Fei3; Sakyi, Patrick Asamoah2
刊名AMERICAN MINERALOGIST
出版日期2022-02-23
卷号107期号:2页码:294-305
关键词Amphibole peridotite chromitite hydrous melts fluids ophiolite
ISSN号0003-004X
DOI10.2138/am-2021-7593
英文摘要Here we present new occurrences of amphibole in a suite of chromitites, dunites, and harzburgites from the mantle sequence of the Lycian ophiolite in the Tauride Belt, southwest Turkey. The amphibole occurs both as interstitial grains among the major constituent minerals and as inclusions in chromite grains. The interstitial amphibole shows generally decreasing trends in Na2O and Al2O3 contents from the chromitites (0.14-1.54 wt% and 0.04-6.67 wt%, respectively) and the dunites (0.09-2.37 wt%; 0.12-11.9 wt%) to the host harzburgites (<0.61 wt%; 0.02-5.41 wt%). Amphibole inclusions in chromite of the amphibole-bearing harzburgites are poorer in Al2O3 (1.12-8.86 wt%), CaO (8.47-13.2 wt%), and Na2O (b.d.l.-1.38 wt%) than their counterparts in the amphibole-bearing chromitites (Al2O3 = 6.13-10.0 wt%; CaO = 12.1-12.9 wt%; Na2O = 1.11-1.91 wt%). Estimated crystallization temperatures for the interstitial amphibole grains and amphibole inclusions range from 706 to 974 degrees C, with the higher values in the latter. A comparison of amphibole inclusions in chromite with interstitial grains provides direct evidence for the involvement of water in chromitite formation and the presence of hydrous melt/fluid metasomatism in the peridotites during initial subduction of Neo-Tethyan oceanic lithosphere. The hydrous melts/fluids were released from the chromitites after being collected on chromite surfaces during crystallization. Different fluid/wall rock ratios are thought to have controlled the crystallization and composition of the Lycian amphibole and the extent of modification of the chromite and pyroxene grains in the peridotites. Considering the wide distribution of podiform chromitites in this ophiolite, the link between chromitite formation and melt/fluid metasomatism defined in our study may be applicable to other ophiolites worldwide.
WOS关键词SW TURKEY IMPLICATIONS ; OMAN OPHIOLITE ; PODIFORM CHROMITITES ; FORE-ARC ; HIGH-CR ; SUBDUCTION INITIATION ; MANTLE PERIDOTITES ; METAMORPHIC SOLES ; BUSHVELD COMPLEX ; PARENTAL MAGMAS
资助项目Second Tibetan Plateau Scientific Expedition and Research Program (STEP)[2019QZKK0801] ; National Natural Science Foundation of China[91755205] ; National Natural Science Foundation of China[41772055] ; Youth Innovation Promotion Association, Chinese Academy of Sciences[2017095]
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
WOS记录号WOS:000748182500014
出版者MINERALOGICAL SOC AMER
资助机构Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/104035]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
地质与地球物理研究所_中国科学院矿产资源研究重点实验室
通讯作者Pan, Qi-Qi; Xiao, Yan
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Univ Ghana, Sch Phys & Math Sci, Dept Earth Sci, POB LG 58, Legon, Ghana
3.Univ Hong Kong, Dept Earth Sci, Pokfulam Rd, Hong Kong, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
5.Karadeniz Tech Univ, Dept Geol Engn, TR-61080 Trabzon, Turkey
6.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
7.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		 Pan, Qi-Qi,Xiao, Yan,Su, Ben-Xun,et al. Amphibole as a witness of chromitite formation and fluid metasomatism in ophiolites[J]. AMERICAN MINERALOGIST,2022,107(2):294-305.
APA Pan, Qi-Qi.,Xiao, Yan.,Su, Ben-Xun.,Liu, Xia.,Robinson, Paul T..,...&Sakyi, Patrick Asamoah.(2022).Amphibole as a witness of chromitite formation and fluid metasomatism in ophiolites.AMERICAN MINERALOGIST,107(2),294-305.
MLA Pan, Qi-Qi,et al."Amphibole as a witness of chromitite formation and fluid metasomatism in ophiolites".AMERICAN MINERALOGIST 107.2(2022):294-305.

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来源：地质与地球物理研究所

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