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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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SHRIMP dating of adakites in western Qinling and their implications
西秦岭埃达克岩的SHRIMP定年及其构造意义
JIN WeiJun, ZHANG Qi, HE DengFa, JIA XiuQin Institute of Geology, Geophysics, Chinese Academy Sciences, Beijing, China Chinese Petroleum Exploration, Development Academy, Beijing, China Institute of High Energy Physics, Chinese Academy Sciences, Beijing, China,
金维浚, 张旗, 何登发, 贾秀勤
Keywords: West Qinling,SHRIMP Geochronology,Granite,Adakite,Tectonics background,Palaeotethys
西秦岭,SHRIMP年代学,花岗岩,埃达克岩,构造环境,古特提斯
Abstract:
西秦岭从夏河-礼县一带发育许多具有埃达克岩地球化学特征的花岗岩,本文对其中的冶力关和夏河岩体进行了 SHRIMP测年,为245±6 Ma和238±4 Ma,属印支早期。西秦岭埃达克岩富K,属于高钾钙碱性系列,地质与地球化学资料表明,西秦岭埃达克岩可能形成于板块消减的活动陆缘环境,与活动陆缘加厚的下地壳熔融作用有关,说明古特提斯洋盆北部的消减作用发生在印支早期。 Full-Text
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