地质通报2016，Vol.35Issue(8)：1263-1270,8.
西藏改则县多不扎地区上侏罗统对望山组的建立及意义
Establishment of Upper Jurassic Duiwangshan Formation in Duobuza area, Gerze ;County, Tibet, and its significance
摘要
Abstract
The Duiwangshan Formation is a rock assemblage developed in the south of Qiangtang plate and consists of andesite, li⁃parite, basaltic tuff and minor basaltic andesite interlayer. It has obvious rhythm distribution characteristics between extrusive facies and sedimentary facies of magma. Conducting LA-ICP-MS U-Pb dating, the authors obtained andesite average 206Pb/238U age of 150.5±0.6Ma, which indicates Duiwangshan Formation should have been formed in middle-late period of Late Jurassic. The Late Ju⁃rassic Duiwangshan Formation was established based on the detailed section measurement and regional correlation, which has impor⁃tant geological significance for the completion of the stratigraphic system in Bangong Co-Nujiang Suture Zone (BANSZ) and the study of tectonic evolution of Bangong Co-Nujiang Ocean in Late Jurassic.关键词
青藏高原/羌塘/对望山组/晚侏罗世/LA-ICP-MS锆石U-Pb测年Key words
Tibetan Plateau/Qiangtang/Duiwangshan Formation/Late Jurassic/LA-ICP-MS zircon U-Pb ages分类
天文与地球科学引用本文复制引用
董宇超,李才,王明,范建军,吴浩..西藏改则县多不扎地区上侏罗统对望山组的建立及意义[J].地质通报,2016,35(8):1263-1270,8.基金项目
国家自然科学基金项目（批准号41272240、41402190）和中国地质调查局项目 （）
