西北地质2017，Vol.50Issue(4)：33-40,8.
东昆仑那陵格勒河地区新元古代变质侵入体LA-ICP-MS锆石U-Pb年龄及意义
Single-Zircon U-Pb and Geological Significance of Metamorphic and Intrusive System of NALINGELE Region in East Kunlun Neo-proterozoic
摘要
Abstract
Neo-proterozoic metamorphic and intrusive rocks (bodies) are discovered in Nalinggelehe area in East Kunlun,which were intruded into Jinshuikou Paleo-proterozic rock group and Wanbaogou Mesoproterozoic-Neoproterozoic rock group,with the lithology of granodioritic gneiss and monzonitic granitic gneiss.The LA-ICP-MS zircon dating of granodioritic gneiss has yielded an age of (840±2) Ma,which belongs to the Neo-proterozoic era.Rock geochemistry shows the characteristics of strong peraluminous,high potassium calc-alkaline series rock,with the features of S type granite,which was formedin continental collision orogenic environment and served as a product of the collision environment.This age and the available dating data suggest that a Meso-to Neo-Proterozoic granitic intrusive belt exists in the eastern margin of the Kunlun block,and that the whole Kunlun block might be a response to the amalgamation event of global Rodinia supercontinent.关键词
新元古代/变质侵入体/花岗闪长质片麻岩/大陆碰撞造山Key words
Neo-proterozoic/intrusive rock/granodioritic gneiss/continental collision orogeny分类
天文与地球科学引用本文复制引用
严玉峰,杨波,李焕学,才航加,许海全,许玉豪..东昆仑那陵格勒河地区新元古代变质侵入体LA-ICP-MS锆石U-Pb年龄及意义[J].西北地质,2017,50(4):33-40,8.基金项目
中国地质调查局西安地质调查中心“青海1∶25万布伦台、大灶火幅区调修测”项目(1212011121187) （1212011121187）
