西藏措勤中新生代沉积盆地演化  

The evolvement of the Coqen basin of Mesozoic-Cenozoic in Tibet,China

作　　者：陶晓风[1] 刘登忠[1] 朱利东[1] 马润则[1] 胡新伟[1] 

机构地区：[1]成都理工大学地球科学学院,成都610059

出　　处：《成都理工大学学报（自然科学版）》2008年第1期103-107,共5页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：四川省重点学科"构造地质学"建设基金资助项目(SZD0408)

摘　　要：措勤盆地位于西藏冈底斯地块中西段,是在古生界褶皱基底上发展起来的一个中-新生代盆地。通过对措勤盆地内发育的构造、地层、岩石及沉积相综合分析,讨论了措勤盆地与喜马拉雅构造带和班公-怒江构造带的对应演化关系,反演了措勤盆地的地质发展历史。其演化经历了盆地基底形成阶段(D-P)、复合弧后盆地演化阶段(J-E2)和高原隆升盆地消亡三个阶段(E3-现今)。The Coqen basin is distributed over the westward of the Gangdise block in Tibet. It is a basin of Mesozoic-Cenozoic according to east-west. The width is 130 km. The length is 700 km. The area is about 100 000 kmz. The basement of the Coqen basin formed in the telophase of Permian and is made up of the folded strata of Paleozoic. The growth of the Coqen basin is from Jurassic to Oligocene. A comprehensive analysis of the structure, the stratum, the rock and the sedimentary facies of the Coqen basin is made in this paper, and the geologic development history of the Coqen basin is reconstructed. The evolvement of the Coqen basin has gone through three stages. The first stage is the foundation of the basin basement in Permian . The second stage is the evolvement of the complex arc back basin from Jurassic to Oligocene. The third stage is the decease of the basin since Oligocene.

关 键 词：西藏 措勤盆地 盆地演化 冈底斯构造带 

分 类 号：TE121.11[石油与天然气工程—油气勘探]