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东昆仑乌拉德陶可可镁橄透闪绿帘石岩地球化学特征及构造环境分析

Geochemical Characteristics and Tectonic Environment Analysis of the Oligotetroxite in Wulad,East Kunlun
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摘要 通过青海格尔木市东昆仑雪山峰地区进行的1:5万区域地质矿产调查,在乌拉德陶可可地区下游一带发现一套经过变质作用的辉长岩岩石带,该辉长岩的经变质作用后主要岩性为暗绿色镁橄透闪绿帘石岩,岩石富Al2O3、FeO、CaO、Na2O,贫Fe2O3、MgO、TiO2、P2O5。稀土总量很低,轻稀土略富集,重稀土略亏损,轻重稀土分馏较差。强不相容元素Rb、Ba、Ce富集,K相对亏损,弱不相容元素P、Ti亏损,母岩辉长岩的构造环境为洋中脊环境。通过对乌拉德陶可可镁橄透闪绿帘石岩的研究成果能为东昆仑山造山带的构造运动提供新的证据。 Through the east kunlun mountains snow qinghai geermu 1:50000 regional geology and mineral resources survey,in woolard Taokeke region in downstream area found a set of after metamorphism gabbro rock band,the gabbro after metamorphism main lithology is dark green magnesium throws through flash green shade rock,rock rich Al2O3,FeO,CaO,Na2O,poor Fe2O3,MgO style,TiO2,P2O5.The total amount of rare earth is very low,the light rare earth is slightly enriched,the heavy rare earth is slightly depleted,and the fractional distillation of light rare earth is poor.Strong incompatible elements Rb,Ba and Ce are enriched,K is relatively deficient,while weak incompatible elements P and Ti are deficient.The tectonic environment of parent gabbro is the mid-ocean ridge environment.The research results of the oligotroxtite drapetite provide new evidence for the tectonic movement of the East Kunlun mountain orogenic belt.
作者 宋羿 吴守智 闵冬云 SONG Yi;WU Shouzhi;MIN Dongyun(Chengdu University of Technology Chengdu 610059,China;Sichuan Zhongcheng Mining Co.,Ltd.,Chengdu 610045,China)
出处 《四川有色金属》 2020年第3期4-6,28,共4页 Sichuan Nonferrous Metals
关键词 东昆仑 镁橄透闪绿帘石岩 辉长岩 洋中脊环境 East Kunlun magnesium tetrachloride epidote Gabbro Mid-oceanic ridge environment
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