龙门山北段天井山构造演化特征及物理模拟  

Evolution characteristics and physical simulation of Tianjingshan structure in northern Longmenshan

作　　者：李卿[1] 李忠权[1] 王森[2] 马启科[1] 李娟[1] 万双双[1] 

机构地区：[1]成都理工大学油气藏地质及开发工程国家重点实验室,四川成都610059 [2]四川省安全科学技术研究院,四川成都610000

出　　处：《断块油气田》2013年第1期24-28,共5页Fault-Block Oil & Gas Field

基　　金：国家自然科学基金项目"四川盆地构造动力学;盆地叠合特征及油气富集规律研究"(41030426-D0304)

摘　　要：根据地震、钻井、野外调查资料和平衡剖面法,模拟恢复天井山的造山过程,认为天井山地区的演化可划分为伸展拉张成盆阶段(震旦纪—中三叠世末)、陆隆伸展演化阶段(晚三叠世—中侏罗世末)、抬升剥蚀阶段(晚侏罗世—早白垩世末)和继承改造阶段(晚白垩世—现今)。通过构造物理模拟实验,初步证实了天井山地区印支期发育的薄皮构造是受南北向挤压应力与北西—南东向重力滑覆共同作用形成的;喜山期,天井山地区在北西—南东向挤压应力作用下变形序列为前展式逆冲叠瓦式构造组合;天井山构造存在多个滑脱层系,滑脱层上下形成分层变形、垂向叠置的不协调收缩构造变形。The orogenic process of Tianjingshan was reproduced based on seismic, drilling, field survey data and equilibrium profile meihod. The evolution of Tianjingshan Region can be divided into extension basin（Sinian-Late Middle Triassic）, continental emergence extension evolution stage（Late Triassic-Late Middle Jurassic）, lifting and denudation stage（Late Jurassic-Early Cretaceous） and reformation succession stage（Late Cretaceous-present）. Through structural physical simulation experiment, it is preliminarily ,nfirmed that the thin-skinned structure developed during the lndo-Chinese epoch was formed by the combined action of the southnorth extrusion stress and northwest-southeast gravity gliding; that during the Himalaya period, Tianjingshan Region was deformed into imbricate thrust structural combination; that the Tianjingshan structure has multiple decollement layers, which form ineoordinated structural dehformation with layered deformation and vertical superposition.

关 键 词：构造演化 物理模拟 天井山 龙门山北段 

分 类 号：TE121.2[石油与天然气工程—油气勘探]