石油与天然气地质 ›› 1992, Vol. 13 ›› Issue (4): 407-417.doi: 10.11743/ogg19920406

• 论文 • 上一篇    下一篇

新疆北三台苍房沟群碎屑岩粒度特征及沉积环境

赵永胜, 赵霞飞   

  1. 成都地质学院 610059
  • 收稿日期:1990-06-19 出版日期:1992-12-25 发布日期:2012-01-16

GRAIN-SIZE CHARACTERISTICS AND SEDIMENTARY ENVIRONMENT OF CANGFANGGOU GROUP IN BEI SHANTAI AREA,XINJIANG

Zhao Yongsheng, Zhao Xiafei   

  1. Chengdu College of Geology
  • Received:1990-06-19 Online:1992-12-25 Published:2012-01-16

PDF (PC)

401

被引次数

9

摘要：

对苍房沟群碎屑岩粒度资料进行分析对比,划分出八种粒度曲线类型。通过对曲线的垂向组合及各总体的分析,结合其它资料,认为苍房沟群的沉积环境为冲积扇、河流(低弯度河沉积)、三角洲和湖泊沉积。指出概率累计曲线和 C-M 图在沉积环境研究中具有较好的效果。

关键词: 粒度分布, 沉积环境, 成因模式, 碎屑岩, 苍房沟群, 新疆

Abstract:

Clastic rocks of the Permian-Triassic Cangfanggou Group that consist of conglomerate,sandstone,siltstone,muddy siltstone and mudrock are the main reservoir rocks in Bei Shantai area.Based on typical probability curves and their vertical combina-tion,C-M patterns and grain-size parameters combining with sedimentary sequences and their primary structures,log curves,the sedimentary environment of the group is consi-dered as follows:1.alluvial fan including braided stream and fan interval deposition;2.fluvial depositional systems containing meandering stream,low sinuosity stream and in-terfluvial lake;3.delta and lake system.It is suggested that comprehensive analysis of grain-size distribution is a useful tool in sedimentary facies identification.