伊犁盆地二叠纪沉积相及古地理特征  

PERMIAN SEDIMENTARY FACIES AND PALAEOGEOGRAPHY IN ILl BASIN

作　　者：郝继鹏[1] 

机构地区：[1]西北石油地质局地质大队

出　　处：《新疆石油地质》1991年第3期190-197,共8页Xinjiang Petroleum Geology

摘　　要：本文通过对伊宁县穷布拉克等6个剖面的分析研究,认为伊犁盆地是一个陆相裂谷型盆地。其堆积物主要为火山岩、碎屑岩、泥岩和灰岩。早二叠世的早期为陆相火山岩喷发期,堆积了厚选3000m的火山碎屑岩。晚二叠世为一断陷淡水湖泊,水下扇发育,湖盆明显由活动期趋向稳定期,为油气的生成与储集提供了有利条件。Ili Basin is considered as a continental rifting basin in which sedimentary facies contain volcanic rock, elastic rock, mudstone and limestone through an analysis of 6 sections in Qiongblark, lning county. During early pre—Permian,the eruption of continental volcanic rocks resulted in the deposition of 3000 m volcanoclastic rocks. In late Permian, a rifting freshwater lake was formed and underwater fan developed. The active lacustrine sedimentation becomes stable ,which is benificial far hydrocarbon generation and accumulation.

关 键 词：沉积相 伊犁盆地 油气 储集层 

分 类 号：P618.130.2[天文地球—矿床学]