摘要
库车盆地位于天山与塔里木之间，在盆内发育有一系列冲断推覆构造，其主要构造样式为沿倾角２．５°基底拆离面上发育的背驮式冲断构造系，逆冲方向由北向南形成时代为中新世—第四纪．应用平衡地质剖面原理，建立了该冲断构造带的两条平衡地质剖面和复原剖面，结果表明，库车盆地冲断构造缩短率达到３５％～４５％，但缩短量不一致．三叠系—侏罗系缩短４０～５０ｋｍ。
The Kuche Basin, located between the Tianshan intraplate orogenic belt and Tarim Plate in Xinjiang Uygur Autonomous Region, northwest China , is the tectonic element of the Mesozoic Cenozoic in which a series of thrusts and fold were formed . The main tectonic style of the Kuche fold thrust belt (KFTB), mainly developed and aging southward since the Miocene, is found to be a piggyback propagation thrust system with thrusting in sense from north to south,on the basis of the new interpretations of the seismic profiles. The main detachment surfaces are the Trassic thick shales and the Neogene gypsum, the second detachment surfaces are red muds of the Late Trassic and thick shales of the Cretaceous in the KFTB. The basal detachment dips 2.5° northward. The balanced geological cross sections of KTFB established by the line balancing principle verify that the KFTB is shortened at a rate of 35%～45% with the shortening value about 40～50km in the Triassic Jurassic and 27～37km in Cretaceous Pliocene strata. Affected by the Indian Eurasia collision, the thrust belt was formed along the western margin of the Tarim Plate, and the strike slip faults along the east margin of the rotating Tarim plate clockwise in the Cenozoic age.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
1996年第3期295-299,共5页
Earth Science-Journal of China University of Geosciences
基金
博士后科学基金
国家自然科学基金
关键词
冲断构造
平衡地质剖面
库车盆地
fold thrust belt, balanced cross section, Kuche Basin.
