新疆鄯善照壁山晚二叠世瓣鳃动物化石及其时代

THE LATE PERMIAN LAMELLIBRANCHIATE FOSSILS AND THEIR AGES IN ZHAOBISHAN,SHANSHAN,XINJIANG

系统研究了首次发现于新缰鄯善照壁山上芨芨槽群上部的瓣鳃动物化石，讨论了化石组合特点及地质时代。根据化石组合特点、岩性和沉积特证，以及剖面结构，重新厘定了博格达山南缘晚二叠世地层层序。认为这里的晚二叠世地层与准噶尔盆地南缘上二叠统完全可以对比，应采用统一的地层名称，这对于吐哈盆地油气资源的综合评价，特别是把上二叠统作为重要的勘探目的层，向更深层次寻找油气资源提供了新的资料。

The Lamellibranchiate fossils firstly discovered in the upper part of Jijicao Group of Zhaobishan in Shanshan of Xinjiang have been systematically studied in this paper,accompanied with a thorough discussion on fossil assemblages and their ages.The Late Permian sequence along the margin of south Bogda Mt.has been reconstructed with profile of fossils assemblage,lithology and sedimentary characteristics,as well as structure of the sections.It is considered that the sequence here should be ascribed to the Late Permian stratigraphic system of the southern Junggar basin,moreover,the above two can be well contrasted.This study may provide some new information on the comprehensive evaluation of the oil and gas in the Turpan-Hami basin,espcially on the regarding of the Upper Permian as an important prospecting target,and going a deep further to find oil and gas resources.