辽西金羊盆地重力场与断裂构造特征研究  

CHARACTERISTICS OF GRAVITY FIELD AND FAULT STRUCTURES IN JINYANG BASIN,WESTERN LIAONING

作　　者：郇恒飞[1] 高铁[1] 孙守亮[1] 李永飞[1] 时彬 HUAN Heng-fei;GAO Tie;SUN Shou-liang;LI Yong-fei;SHI Bin(Shenyang Center of China Geological Survey,Shenyang 110034,China;Liaoning Institute of Geology and Mineral Survey,Shenyang 110031,China)

机构地区：[1]中国地质调查局沈阳地质调查中心,辽宁沈阳110034 [2]辽宁省地质矿产调查院,辽宁沈阳110031

出　　处：《地质与资源》2023年第5期566-574,641,共10页Geology and Resources

基　　金：国家重点研发计划项目“华北克拉通成矿系统的深部过程与成矿机理”(2016YFC0600108);中国地质调查局项目“东北地区重要盆地多能源资源地质调查”(DD20221664).

摘　　要：在金羊盆地物性特征研究的基础上,通过对重震等资料的综合处理,完成了研究区重力场特征及成因分析和断裂构造体系的划分.研究区重力场的特征是区内西部凹陷、中东部凸起和中南部凹陷共同作用.重力区域场主要是前中生界底面(基底)起伏变化引起.重力剩余场高、低相间排列的特征反映了区内凹隆格局及凹隆间发育的断裂.研究区断裂体系主要由北东向和北西向2组断裂构成,前者形成时期早于后者,都对金羊盆地的次级构造形态进行后期的多次改造,形成本区凹、凸相间的构造格局.Based on the study of physical characteristics of Jinyang Basin,through comprehensive processing of gravity and seismic data,the paper analyzes the characteristics and causes of gravity field and classifies the fault system.The gravity field represents the joint action of western sag,mid-eastern uplift and mid-southern sag in the area.The regional gravity field is mainly caused by the undulation of pre-Mesozoic bottom(basement),while the high-low alternating distribution of residual gravity field reflects the concave-uplift pattern and developed faults inside.The structural system is mainly composed of NE-and NW-trending faults,with the former formed earlier than the latter,both multiply reforming the secondary structures of Jinyang Basin in later stages,and forming the concave-convex alternating structural pattern.

关 键 词：金羊盆地 重力场 重震联合反演 断裂构造 辽西地区 

分 类 号：P631.1[天文地球—地质矿产勘探] P542.3[天文地球—地质学]