大巴山前晚二叠世—早三叠世的伸展构造研究  

Later Permian to Early Triassic Extensional Structure in Front of Dabashan Mountain

作　　者：张林[1] 魏国齐[2] 杨威[2] 张培军[3] 吴世祥[2] 

机构地区：[1]中国矿业大学资源院与地球科学学院,江苏徐州221008 [2]石油勘探开发科学研究院廊坊分院,河北廊坊065007 [3]西南油气田分公司开发事业部,四川成都610051

出　　处：《中国矿业大学学报》2005年第1期57-61,共5页Journal of China University of Mining & Technology

基　　金：国家"十五"科技攻关项目(2001BA605A04)

摘　　要：根据现有地质资料并结合区域地质特征,进行了地震剖面解释和构造体系划分,探讨了沉积特征及储层分布.结果表明大巴山地区具有深层和浅层2种构造样式.浅层为沿早三叠世嘉陵江组的石膏层滑脱变形的薄皮冲断构造,属燕山—喜山期推覆构造;深层为二叠系—早三叠世层系的伸展断陷构造,属海西期的伸展变形构造.早期伸展断层控制了同期的构造和沉积特征,形成一系列复式地垒和地堑的结构,在斜坡带见滑动变形、碎屑流等构造现象.在断层控制的边缘及地垒区鲕滩发育,呈北西向展布,为油气有利勘探区.Based on some existing geological data and regional geological characteristics, the seismic profiles are interpreted, the structure system is classified, and depositional characteristic as well as reservoir distribution are discussed. The result shows that Dabashan mountain contains two kinds of structure styles, the shallow and deep structural styles. The shallow one is characterized by pellicle thrust slidding in gypsum of early Triassic Jialingjiang formation during Indosian and early Himalayan movements. The deep one is characterized by extensional rift growing in later Permian to early Triassic formations during Hercynian movement. The early extensional fault controlled the structure systems, forming a series of compound structures of horst and graben and sedimentary facies in which many early sedimentary characters on slope, such as glide deformation and clastic flow can be seen. Oolitic shoals distributed in NW direction are well developed along fringes and in horsts controlled by faults and are favorable for gas and oil exploration.

关 键 词：地垒 早三叠世 伸展构造 沉积特征 冲断构造 区域地质 斜坡带 深层 大巴山 储层分布 

分 类 号：TD163[矿业工程—矿山地质测量] P542[天文地球—构造地质学]