吐哈盆地哈密坳陷逆断层活动性及演化  

Activities and evolution of thrust faults in Hami depression,Tu-Ha Basin

作　　者：姜素华[1] 宋传会[1] 李三忠[1,2] 张红艳[1] 杨晓婕[1] 

机构地区：[1]中国海洋大学海洋地球科学学院,山东青岛266100 [2]海底科学与探测技术教育部重点实验室,山东青岛266100

出　　处：《中国石油大学学报（自然科学版）》2013年第4期1-6,14,共7页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家自然科学基金项目(41190072;41072152);中央高校财政南海专项联合资助项目(201021003)

摘　　要：在构造解释及断层受力机制分析的基础上,根据逆断层两盘剥蚀与沉积的关系,将哈密坳陷逆断层活动的地质模型归纳为单向逆冲型、逆冲生长型和基底抬升型,并提出针对这3种类型逆断层活动量的计算方法,对主要断层在印支期、燕山期和喜山期的活动强度进行研究。结果表明:火石镇凹陷内的断层在印支期活动最为强烈,燕山期断层活动变弱,喜山期只有南部边界断层活动增强;三堡凹陷内的断层在印支期开始活动,燕山期断层活动最为强烈,喜山期断层基本停止活动;断层活动的差异性直接影响着各凹陷构造格局的形成与演化,火石镇凹陷构造格局早在印支运动就基本定型,而三堡凹陷的构造格局在晚燕山运动后才最终定型。Based on the interpretation of seismic profiles and analysis of fault pattern, three different geological models named single-force thrusting, double-force slipping and basement uplifting were proposed by analyzing the relationship between de-nudation and sedimentation at the two sides of the fault in Hami depression. Three test fault activity formulas for those differ- ent models were given to calculate vertical displacements of the major faults during the Indosinian, the Yanshanian and the Himalayan periods. The results show that the thrusting in Huoshizhen sag is intensive during the Indosinian period, but be-came weaker and weaker during the Yanshanian period, the activity of fault enhanced only in the south boundary during the Himalayan period. While the thrusting in Sanbao sag initiated during the Indosinian period, and became more intensive dur-ing the Yanshanian period, then terminated during the Himalayan period. Differentiation of the fault activity in different sags directly control the formation and evolution of the structural patterns in these sags. The tectonic framework of Huoshizhen sag basically developed during the Indo-china movement, while that of Sanbao sag finally developed after the Yanshanian move- ment.

关 键 词：哈密坳陷 逆断层 地质模型 断层活动性 断层演化 

分 类 号：TE121.2[石油与天然气工程—油气勘探]