新疆石油地质 ›› 1991, Vol. 12 ›› Issue (3): 190-197.

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伊犁盆地二叠纪沉积相及古地理特征

郝继鹏   

  1. 西北石油地质局地质大队
  • 收稿日期:1991-02-09 发布日期:2020-06-15

PERMIAN SEDIMENTARY FACIES AND PALAEOGEOGRAPHY IN ILI BASIN

Hao Jipeng   

  1. Geologic Brigade of Northwestern Petroleum Geology Bureau
  • Received:1991-02-09 Published:2020-06-15

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。

关键词: 陆相裂谷盆地, 沉积相, 岩相古地理, 二叠纪

Abstract: Hi Basin is considered as a ctmtinental rifting basin in which sedimentary facies contain volcanic rock, clastic rock,mudstone and limestone through an analysis of 6 sections in Qiongblark,Ining 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 f〇T hydiocarbon generation and accumulation.

Key words: continental rifting basin, sedimentary facies, petrographic palacogeography, permian