塔里木西部石炭—二叠纪沉积体系特征

SEDIMENTARY SYSTEM OF CARBONIFEROUS-PERMIAN OF WESTERN TARIM

对塔里木西部地区３０余条剖面及钻井资料的全面系统分析研究，结合地震资料，认为石炭－二叠纪为一个完整的海进至海退旋回。在海进初期和海退末期为碳酸盐岩和碎屑岩混积时期，用＂混积陆棚＂的概念，将石炭－二叠系划分为下石炭统（个别地区的下二叠统下部）混积陆棚沉积体系；上石炭统至下二叠统下部为碳酸盐岩台地沉积体系；下二叠统上部至上二叠统为陆源碎屑沉积体系。

Coupled with seismic data, a systematic research of over 3o sections add drilling data show that Carboniferous-Permian is a complete cycle from progression to regression. During the eatly st age of progression and late stage of regression carbonates and elastics occured in a melapged accumulation.Applying the concept of 'melanged accumulation shelf' the Carboniferous-Persian can be subdivided into Lower Carboniferous melanged accumulation shelf system, Upper Carboniferous-lower part of Lower Permian carbonates platform sedimentary system, and upper part of Lower Permian-Upper Permian terrigenous clastic,sedimentary systems.