Silurian to Devonian foreland basin in the south edge of Tarim Basin

作     者：WEI Guoqi JIA Chengzao LI Benliang CHEN Hanlin 

作者机构：Langfang Branch Research Institute of Exploration and Development PetroChinaLangfang 065007China PetroChina Company LimitedBeijing 100011China Earth Science DepartmentZhejiang UniversityHangzhou 310013 China 

出 版 物：《Chinese Science Bulletin》 (中国科学通报)

年 卷 期：2002年第47卷第S1期

页      面：42-46页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：国家科技攻关项目 

主　　题：Tarim Basin ophiolite igneous volcanics peripheral foreland basin foreland thrust belt. 

摘      要：Based on the theory of plate tectonics, combin-ing with the isotopic dating of ophiolite, igneous and volcan-ics, geochemical test, rare earth element analyze and seismicinterpretation, this paper studies the pre-Carboniferous tec-tonics and sedimentary formation of the south edge of theTarim Basin and proves that there exists the Kunlun Oceanunder tensional tectonics during the Sinian and Cambrian inthe south edge of the Tarim Plate. After that, due to the colli-sion orogenesis, there formed the peripheral foreland basinin the south edge of Tarim. The Upper Silurian and Devo-nian molasses sedimentary system superposed on the Sinianand Middle Silurian passive margin flysch sedimentary sys-tem and formed the bivariate structure of the foreland *** at the same time, based on the field geology and seismicinterpretation, we have identified that the formation of theSilurian and Devonian have the character of half depositwhich shows thick in the south area and thin in the north,and the pre-Carboniferous thrust compression tectonics re-mained in the foreland thrust belt, which further demon-strates that there existed the Silurian and Devonian periph-eral foreland basin on the south edge of the Tarim Basin.