北部海岸带(台州以北)航磁反映的断裂和岩性构造特征  

Fault and lithology interpretation for the northern coastal zone of Taizhou based on aeromagnetic data

作　　者：王明 李皎皎 张永军 李逸川 徐璐平 Wang Ming;Li Jiao-jiao;Zhang Yong-jun;Li Yi-chuan;Xu Lu-ping(China Aero Geophysical Survey and Remote Sensing Center for Natural Resources,Beijing,PRC;Key Laboratory of Airborne Geophysics and Remote Sensing Geology of MNR,Beijing,PRC)

机构地区：[1]中国自然资源航空物探遥感中心,北京100083 [2]自然资源部航空地球物理与遥感地质重点实验室,北京100083

出　　处：《Applied Geophysics》2024年第2期372-383,421,422,共14页应用地球物理（英文版）

基　　金：supported by the Foundation for Youth Innovative Research of Key Laboratory of Airborne Geophysics and Remote Sensing Geology of MNR(2020YFL08);The National Key Research and Development Program of China(2017YFC0602204);Investigation and application of airborne geophysical remote sensing in Bohai Coastal Zone(DD20160150).

摘　　要：北部海岸带(台州以北)横跨华北地块、下扬子地块和华夏地块三个构造单元,区域地质构造复杂,岩浆活动强烈,断裂发育。本文以最新编制的航磁资料为主,结合航空重力、区域地质和实测岩石物性资料等,对区内的岩浆岩航磁异常特征及分布规律、断裂进行划分和研究;圈定各类侵入岩和火山岩数百处,岩浆活动主要集中于中新生代,以燕山期为主,受深大断裂控制;断裂主要以NE向、NNE向及NW向为主,间有SN向、EW向及弧形断裂存在,前者对区域构造、岩浆活动等有明显的控制作用;并利用天然地震震中分布和GPS速度场等信息初步探讨了断裂活动性。研究成果为服务于国家重大战略需求和海岸带综合地质调查,解决重大地质问题,实现海陆统筹的目标和服务于北部海岸带(台州以北)经济区规划、城市群规划选址、重大工程建设等提供了参考依据。The northern coastal zone of Taizhou spans three tectonic units:the North China Block,Lower Yangtze Block,and Cathaysian Block.The regional geological structure is complex,magmatic activity is strong,and faults are developed.Based on the latest aeromagnetic data,along with airborne gravity,regional geology,and measured rock susceptibility data,the aeromagnetic anomaly characteristics and distribution regularity of magmatic rocks and faults in the study area are classifi ed and studied.Hundreds of intrusive and volcanic rocks are delineated,and magmatic activity is mainly concentrated in the Meso–Cenozoic Era,which is dominated by the Yanshanian Period and controlled by deep-large faults;these deep-large faults are mainly distributed in NE,NNE,and NW directions.There are SN,EW,and arc faults as well.The former has a great infl uence on the regional structure and tectonic evolution.Based on the epicenter distribution of natural earthquakes,deep-large fault activity is preliminarily discussed.The results presented in this study can provide a reference for meeting national strategic needs and conducting a comprehensive geological survey of the coastal zone,resolving major geological problems,realizing the goal of land–sea integration,and assisting in the planning of northern coastal economic zone,urban agglomeration planning and site selection,major engineering constructions,and so on.

关 键 词：航磁 航重 磁场特征 岩浆岩 断裂构造 北部海岸带 

分 类 号：P548[天文地球—构造地质学] P631[天文地球—地质学]