新疆伊犁盆地上二叠统研究

新疆伊犁盆地上二叠统研究

崔智林梅志超屈红军陈世悦郑国强杨雷刘俊霞吴亚红熊利平

西北大学地质系

收稿日期:1996-09-20 修回日期:1996-09-20 出版日期:1996-09-20 发布日期:1996-09-20

A STUDY ON THE UPPER PERMIAN OF THE YILY BASIN, XINJIANG

Cui Zhilin1, Mei Zhichao1, Qu Hongjun1, Chen Shiyue1, Zheng Guoqiang1, Yang Lei1, Liu Junxia2, Wu Yahong2, Xiong Liping2

1. Department of Geology, Northwest University; 2. Zhongyuan Bureau of Petroleum Exploration

Received:1996-09-20 Revised:1996-09-20 Online:1996-09-20 Published:1996-09-20

摘要/Abstract

摘要： 伊犁盆地上二叠统主要为河湖相泥岩和砂、砾岩、晓山萨依组以孢粉Cordaitina-Hamiapollenites-Vittatina组合为特征，与准喝尔乌拉泊组的孢粉组合相似；哈米斯特组为火山岩、火山碎屑岩和凝灰质砂砾岩，含Palaeonodonta Anthraconauta等双壳化石，可与井井子沟组部分或大部分对比；铁木里克组以细粒沉积为特征，含“MPPAO”双壳组合和Cordaitina-Crucisaccites－Protohaploxypinus孢粉组合，与准噶尔芦草沟组的特征相似；巴卡勒河组仍含“MPPAO”双壳组合，但类别较丰富，与红雁池组相同。本组顶部的舟形类组合和孢粉组合显示可能属于下仓房沟群；巴斯尔干组产晚二叠世介形类，相当下仓房沟群。

Abstract: The Yily Basis in the central Tianshan orogenic belt accommodates a huge thickness (about 5000-9000m) of continental Permian strata. The Upper Permian is chiefly composed of fluvial-lacustrine deposits bearing fossils of sporo-pollen, bivalves, ostracodes, and plants. The Xiaoshansayi Formation discordantly overlying the Wulang Group of Lower Permian consists of 419m thick lacustrine mudstone, sandstone and conglomerate with the Cordaitina-Hamiapollenites-Vittatina sporo-pollen assemblage. The Hamist Formation comprises volcanic rocks and coarse clastic sedimentary rocks yielding bivalve Palaeonodonta, Anthraconauta. Argillaceous rocks of lacustrine facies dominate the Tiemulike and the Bakaluesayi Formation, but are frequently interbedded with massive conglomerate beds in the latter. “MPPAO” bivalve fauna and a similar sporo-pollen assemblage occur in these two formations. The Basrgan Formation of the uppermost Permian is composed of fluvial-alluvial conglomerate and sandstone, and reaches 650m thick. The fossil assemblages, lithological features and sedimentary facies of Upper Permian in the Yily Basin show a strong similarity to those of the Junggar Basin.

崔智林梅志超屈红军陈世悦郑国强杨雷刘俊霞吴亚红熊利平. 新疆伊犁盆地上二叠统研究[J]. J4.

Cui Zhilin1, Mei Zhichao1, Qu Hongjun1, Chen Shiyue1, Zheng Guoqiang1, Yang Lei1, Liu Junxia2, Wu Yahong2, Xiong Liping2. A STUDY ON THE UPPER PERMIAN OF THE YILY BASIN, XINJIANG[J]. J4.