油气地质

川西中三叠统天井山组风暴沉积的发现及古地理意义

  • 李传亮 ,
  • 曹建军
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  • 成都理工大学“油气藏地质及开发工程”国家重点实验室
彭靖淞,1984 年生,男,成都理工大学在读硕士研究生,现主要从事石油地质方面的研究。地址:(610059)四川省成都理工大学 榕树园8 单元4-2-3。Email:pengjingsong@gmail.com

网络出版日期: 2009-03-16

Discovery of tempestite in Middle Triassic Tianjingshan Formation in western Sichuan and its paleogeographic significance

  • LI Chuanliang ,
  • CAO Jianjun
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  • State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China

Online published: 2009-03-16

摘要

笔者首次发现川西地区中三叠统天井山组(T2 t)中有大量的风暴岩。其中包含许多典型的与风暴相关的沉积构造,包括冲刷-充填构造、粒序层理和块状层理、丘状和凹状交错层理、扁平砾屑岩层等。该区风暴岩有6 种沉积层序,Ⅰ型、Ⅱ型层序为远源风暴岩,Ⅲ型、Ⅳ型、Ⅴ型和Ⅵ型层序为近源风暴岩。风暴岩的区域展布差异和广泛分布表明,拉丁期上扬子西缘处于风暴活动频繁的低纬度陆棚缓坡沉积环境。 天井山组风暴岩是四川盆地的一种新型储层。

本文引用格式

李传亮 , 曹建军 . 川西中三叠统天井山组风暴沉积的发现及古地理意义[J]. 岩性油气藏, 2009 , 21(1) : 83 -88 . DOI: 10.3969/j.issn.1673-8926.2009.01.016

Abstract

Tempestites have been found for the first time in the Middle Triassic Tianjingshan Formation in western Sichuan. The tempestites contain many typical sedimentary structures originated from storm activities, such as scourinfill structure, graded bedding, massive bedding, hummocky cross stratification, sunken cross stratification and flat rudites. The tempestites have 6 types of sedimentary sequences, among them, typeⅠand typeⅡ are distal tempestite, while type Ⅲ, Ⅳ, Ⅴand Ⅵ are proximal tempestite. The wide distribution and differences in regional distribution of tempestites indicate that the sedimentary environment of the western margin of Yangtze Block during Ladinian stage might be a ramp of low latitudes where the storm activities were frequent. The tempestite of Tianjingshan Formation is a newkind of reservoir in Sichuan Basin.

参考文献

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