摘要
西昆仑冬巴克寒武纪片麻状英云闪长岩是1:25万康西瓦幅、岔路口幅等4幅区域地质调查项目,首次从原划古元古界埃连卡特岩群中解体出来的一套侵入岩。重点对该套侵入岩的岩石学和同位素年代学进行了研究,获得了高精度锆石SHRIMP U- Pb同位素年龄502Ma±9Ma,其形成时代为中寒武世。该同位素资料的获得,为进一步深入详细地研究塔里木陆块与西昆仑造山带的地质构造演化提供了新的实际资料。
The Dongbake gneissic tonalite in northern Kangxiwar, West Kunlun, is a suite of intrusive rocks disintegrated for the first time from the Paleoproterozoic Ailiankate Group-complex in four 1：250000 sheets such as Kangxiwar and Chalukou sheets. The focus of this study was placed on the petrology and isotope chronology of this suite of intrusive rocks and a highly precise zircon SHRIMP U-Pb age of 502±9 Ma has been obtained, which indicates that the suite of intrusive rocks formed in the Middle Cambrian. The availability of the isotope data provides new actual material for the further and intensive study of the tectonic evolution of the Tarim block and West Kunlun orogenic belt.
出处
《地质通报》
CAS
CSCD
北大核心
2007年第6期726-729,共4页
Geological Bulletin of China
基金
中国地质调查局<1:25万康西瓦
恰哈
岔路口
阿克萨依湖幅区域地质调查>项目成果
