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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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Dating of two types of granite from north Qilian,China
北祁连东部两类Ⅰ型花岗岩定年及其地质意义
WU CaiLai, YANG JingSui, YANG HungYi, Joseph L WDEN, SHI RenDeng, CHEN SongYoung, ZHENG QiuGuang Institute of Geology, Chinese Academy of Geological Sciences, Beijing, china Chungkung University, Taiwan, China Stanford University, CA USA,
吴才来, 杨经绥, 杨宏仪, 史仁灯, 陈松永, 郑秋光, Joseph, L.WOODEN
Keywords: East of north Qiliang,Two type of granite,Zircon dating
北祁连东部,两种类型花岗岩,锆石定年
Abstract:
北祁连东部早古生代地层中产出两种特征不同的I型花岗岩类,其一以井子川岩体为代表,暗色矿物以角闪石为主,稀土总量为90×10~(-6)～106×10~(-6),轻重稀土比值小于8,锆石的SHRIMP年龄为464±15Ma,岩体形成的构造环境类似于岛弧;其二是以黄羊河岩体为代表,暗色矿物以黑云母为主,稀土总量为214×10~(-6)～250×10~(-6),轻重稀土比值大于8,锆石的LA-ICP-MS年龄为383±6 Ma,岩体形成于碰撞后环境。 Full-Text
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