地质科学Issue(3)：723-732,10.
塔里木盆地西南缘构造样式及其主导因素
Structural styles in south-western margin of Tarim Basin and their dominate factors
摘要
Abstract
The structural deformation belt is between south-western margin of Tarim Basin and west Kunlun Mountain, its structural trend is NNW or nearly EW,and with the characteristics of zonation from the south to the north,segmentation from the west to the east,and layering from the deep to the shallow. Basement involved thrust and decollement structure distributed in every segment, belt and layer. The structural styles including break-thrust folds, fault-propagation folds, detachment folds and fold-bend folds. After identifying the unconformity plane and syn-tectonic deposition evidence.it considered that structures were formed mainly in the Pliocene-Quaternary. The northern fold belt was formed in the Early Pliocene, the center fold belt was formed in Middle-Latter Pliocene, and the northern fold belt was formed in Early-Middle Pleistocene. Finally, the present structure pattern of south-western margin was formed after Latter Pleistocene. The dominate factors of structural deformation include boundary manner of strains and distribution variation of incompetent ductile layers. The boundary manner of strains determines the segmentation character. Gypsum-mudstone layer delaminates in vertical direction, its distribution delimits the extent of fold-thrust deformation, and its thickness results the extent of shallow layers' deformation.关键词
塔里木盆地西南缘/西昆仑山/膏泥岩/构造样式/构造形成时间Key words
South-western margin of Tarim Basin/ West Kunlun Mountain/ Gypsummudstone/ Structural styles/ Structure formation time分类
天文与地球科学引用本文复制引用
张玮,漆家福,李勇..塔里木盆地西南缘构造样式及其主导因素[J].地质科学,2011,(3):723-732,10.基金项目
国家重点基础研究发展计划“973”项目(编号:2006CB202301)和中国石油天然气股份有限公司项目“昆仑山前中段重点构造解析及构造变形机理研究”(编号:041009090073)资助. （编号:2006CB202301）
