地质通报2015，Vol.34Issue(12)：2236-2245,10.
雅鲁藏布江缝合带东段白垩纪混杂岩归属及其构造意义
Attribution of the Cretaceous Mélange along eastern segment of the Yarlung Zangbo suture zone:Impli-cations to tectonic boundary between India and Asia collision
摘要
Abstract
Geological field investigation, facies analysis and detrital zircon U-Pb geochronology were used to study the so-called'Langxian Cretaceous mélange (KL), which outcrops on the southern side of the eastern Yarlung Zangbo suture zone in Shannan Pre-fecture, southern Tibet. The results obtained indicate that the southern'KL'is quite similar to the Upper Triassic flysch Langjiexue Group in lithofacies, provenance and relative probability of detrital zircons U-Pb age (distinctive ca. 230Ma and 530Ma in age popu-lation), but different from the narrow belt of the northern counterpart. It is suggested that most of the'KL'can be assigned to the Langjiexue Group, implying that the collision boundary between Indian and Eurasian continents is the Naidong-Jindong-Moluo fault (Zhanang-Jiacha-Nang-Milin zone), rather than the Zedang-Jiacha-Langlagangze fault in the north or Naidong-Qusong-Bailu fault in the south.关键词
岩相分析/碎屑锆石/朗县白垩纪混杂岩/郎杰学群/上三叠统/印度-亚洲碰撞边界Key words
facies analysis/detrital zircon/Langxian Cretaceous mélange/Langjiexue Group/Upper Triassic/collision boundary of In?dia and Asia分类
天文与地球科学引用本文复制引用
张朝凯,李祥辉..雅鲁藏布江缝合带东段白垩纪混杂岩归属及其构造意义[J].地质通报,2015,34(12):2236-2245,10.基金项目
国家自然科学基金项目(批准号:41072075) （批准号:41072075）
