龙门山北段枫顺场--天井山构造演化特征  

EVOLUTION CHARACTERISTICS OF FENGSHUNCHANG-TIANJING MOUNTAIN STRUCTURES IN NORTH LONGMEN MOUNTAIN

作　　者：杨渊宇[1,2] 李忠权[1,2] 喻颐[1,2] 张本健[3] 杭文艳[1,2] 

机构地区：[1]成都理工大学地球科学学院,四川成都610059 [2]油气藏地质及开发工程国家重点实验室,四川成都610059 [3]西南油气田分公司川西北气矿,四川江油621700

出　　处：《大庆石油地质与开发》2013年第1期12-17,共6页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家自然科学基金（41030426）和教育部博士点基金项目（20095122110002）.

摘　　要：通过对地震剖面的连片解释和剖面构造演化研究认为，枫顺场-天井山构造自震旦纪以来经历了拉张成盆、陆隆伸展背景下的3期演化过程。震旦纪-中三叠世末以拉张成盆作用为主，接受了一套海相碳酸盐岩和碎屑岩地层沉积，该时期枫顺场-天井山构造不存在；晚三叠世-中侏罗世末为重力滑动阶段，位于重力滑动构造系统前锋推挤带的枫顺场-天井山区域发育以薄皮构造为主的一系列逆冲推覆构造；晚侏罗纪以来开始挤压造山运动，构造动力学背景由重力滑动逐渐转化为水平挤压，发生基底卷入变形，形成一系列以厚皮构造为主的前展式逆冲推覆构造，剥蚀后表现为现今的构造样式。By the studies of the commingled interpretation and the structural evolution of the seismic profiles, Fengshunchang-Tianjing Mountain Tectonics has experience, the following three evolution process from Sinian to Now. extended to generate a basin, gravity gliding and compressional orogenesis under the background of the conti- nental uplift and expansion. At the extensional basin stage （Z-T2） , there were no Fengshunchang-Tianjing Moun- tain structures, but sedimentated a series of sea facies carbonate and clastic formations. At the gravity gliding stage （ T3-J2 ） , located in the front of the gravity gliding belt of the structural system, Fengshunchang-Tianjing Mountain regionally developed into a series of thrust nappe structures taking thin surface structure as the main form; since Late Jurassic period （J3-Q） , the compressional orogenesis has formed, the background of the structural dynamics changes gradually from stretching/gravity gliding to horizontal compression, accompanied with the basement-in- volved deformation, and then a series of advance thrust structures taking thick surface structure as main form are produced. After eroding, the above structures manifests as nowaday structural patterns.

关 键 词：龙门山北段 构造演化 重力滑动 造山运动 构造样式 

分 类 号：TE121.2[石油与天然气工程—油气勘探]