扬子地块东南缘大地构造演化及其油气地质意义

被引:105
作者
王剑
段太忠
谢渊
汪正江
郝明
刘伟
机构
[1] 中国地质调查局成都地质调查中心
关键词
扬子地块; 构造演化; 南华裂谷; 被动大陆边缘; 油气资源前景;
D O I
暂无
中图分类号
P618.130.2 [地质构造、油气藏(田)的形成];
学科分类号
070901 [矿物学、岩石学、矿床学];
摘要
华南扬子地块东南缘成冰纪至早古生代可划分为3个大地构造演化阶段:南华裂谷阶段(820~635 Ma),在扬子地块东南缘的主裂谷系中,沉积了一套冲洪积相碎屑岩、陆相火山岩、深水重力流及冰碛岩等火山-碎屑岩组合;被动大陆边缘演化阶段(Nh—Camb,635~488Ma),扬子地块东南缘发育了一套最大厚度超过3000m的以碳酸盐岩沉积为主的超层序;前陆盆地演化与造山阶段(O—S,488~420Ma),发育了另一个套超层序,下部以碳酸盐岩沉积为主,上部以陆相碎屑岩为主。在盆地演化过程中,扬子地块东南缘不仅沉积了3套重要烃源岩:陡山沱组富有机质的泥质碳酸盐岩和黑色页岩、牛蹄塘组黑色页岩、五峰组—龙马溪组黑色岩系,也发育了各种优质的储集层。而位于雪峰山西侧褶皱带之内的湘、鄂、黔、渝及川相邻区,油气地质条件优越,是下古生界油气(含页岩气)勘探的有利地区。
引用
收藏
页码:1739 / 1749
页数:11
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