Sea-Floor Metamorphism Recorded in Epidosites from the ca.1.0 Ga Miaowan Ophiolite,Huangling Anticline,China  

作　　者：王军鹏 Timothy M Kusky Ali Polat 王璐 彭松柏 蒋幸福 邓浩 王淞杰 

机构地区：[1]Faculty of Earth Sciences,China University of Geosciences [2]State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences [3]Three Gorges Research Center for Geo-hazard,Ministry of Education,China University of Geosciences [4]Department of Earth Sciences,University of Windsor [5]Three Gorges Research Center for Geo-hazard,Ministry of Education,China University of Geosciences

出　　处：《Journal of Earth Science》2012年第5期696-704,共9页地球科学学刊（英文版）

基　　金：supported by the China Postdoctoral Science Foundation (No. 20100471203);the Ministry of Land and Resources (No. 1212010670104);the National Natural Science Foundation of China (Nos. 91014002, 40821061, 41272242);Ministry of Education of China (Nos. B07039 and TGRC201024)

摘　　要：The epidosites are interpreted to form in upflow zones at the base of ore-forming oceanic hydrothermal systems that vent as black smokers on the sea floor. This study presents new field, major and trace element, and oxygen isotope data for the recently discovered epidosites in the ca. 1.0 Ga Miaowan （庙湾） ophiolite located near the northern margin of the Yangtze craton. The ep-idosites occur mainly in the cores of strongly de-formed, lensoidal amphibolites. Field observations, major and trace elements and oxygen isotopes sug-gest that the epidosites were formed by metasoma-tism of ocean floor basalts, diabase dykes, and gabbros during seafloor hydrothermal alteration.The epidosites are interpreted to form in upflow zones at the base of ore-forming oceanic hydrothermal systems that vent as black smokers on the sea floor. This study presents new field, major and trace element, and oxygen isotope data for the recently discovered epidosites in the ca. 1.0 Ga Miaowan （庙湾） ophiolite located near the northern margin of the Yangtze craton. The ep-idosites occur mainly in the cores of strongly de-formed, lensoidal amphibolites. Field observations, major and trace elements and oxygen isotopes sug-gest that the epidosites were formed by metasoma-tism of ocean floor basalts, diabase dykes, and gabbros during seafloor hydrothermal alteration.

关 键 词：epidosite hydrothermal altera-tion METASOMATISM Miaowan ophiolite Yangtzecraton China. 

分 类 号：P597.3[天文地球—地球化学]