西昆仑北羌塘陆块早—中二叠世地层化石的发现及意义

Discovery of Early-Mid Permian fossils in the northern Qiangtang block, West Kunlun, and its significance

摘要: 提要：在1∶25万岔路口幅区调红山湖一带地质填图和实测地层剖面中，于西昆仑北羌塘陆块岔路口地区原划上石炭统恰提尔群中采到了大量珊瑚、■类化石，经鉴定其形成时代为早二叠世晚期—中二叠世早期。该生物化石的取得，为该套地层时代划分提供了依据，填补了西昆仑北羌塘陆块岔路口地区缺失早—中二叠世地层的空白，为进一步详细研究西昆仑北羌塘陆块地层层序格架及地质演化，提供了新的基础资料。

Abstract: Abstract：Large numbers of coral and fusulinid fossils were collected from the strata originally assigned to the Upper Carboniferous Qiati'er Group in the Chalukou area of the northern Qiangtang block, West Kunlun, during geological mapping and cross-section measurements of the Hongshanhu area of the 1:250,000 Chalukou Sheet. Their ages were determined to be late Early Permian-early Middle Permian. These fossils provide a basis for the determination of the age of this sequence of strata, fill in a gap of the Early-Mid Permian strata in the Chalukou area of the northern Qiangtang block, West Kunlun, and offer new baseline information for the intensive study of the stratigraphic sequence framework in the northern Qiangtang block, West Kunlun.