基于航空重磁资料对大杨树盆地南部及周边岩浆岩分布规律的认识  

Cognitions of Magmatic Rock Distribution in Southern and Surrounding Area of Dayangshu Basin Based on Airborne Gravity and Magnetic Data

作　　者：曹安琪 刘燕戌 赖燕玲 孟维棣 高姗 王宁 蔡锦 蒋哲欣 CAO Anqi;LIU Yanxu;LAI Yanling;MENG Weidi;GAO Shan;WANG Ning;CAI Jin;JIANG Zhexin(China Aero Geophysical Survey and Remote Sensing Center for Nature Resources,Beijing 100083;Hebei Institute of Geological Environment Monitoring,Shijiazhuang,Hebei 050021;Jilin Jianzhu University,Changchun,Jilin 130119;College of Geoexploration Science and Technology,Jinlin University,Changchun,Jilin 130026)

机构地区：[1]中国自然资源航空物探遥感中心,北京100083 [2]河北省地质环境监测院,河北石家庄050021 [3]吉林建筑大学,吉林长春130119 [4]吉林大学地球探测科学与技术学院,吉林长春130026

出　　处：《地球学报》2024年第2期189-202,共14页Acta Geoscientica Sinica

基　　金：中国地质调查局项目“松辽盆地及外围航空物探调查”(编号:DD20190028)资助。

摘　　要：基于区域地质-地球物理综合研究,利用最新实测的航空重磁综合测量数据,结合野外踏勘与物性测量结果,采用化极、向上延拓、垂向导数等场源分离或异常提取技术,研究了大杨树盆地南部及周边不同类型岩浆岩的重磁异常响应,圈定了其空间分布范围,揭示了区域岩浆岩发育特征、分布规律及其控制因素。研究表明,研究区不同类型的岩浆岩具有迥然不同的航磁异常特征;本次采用的突出局部重磁异常的地球物理方法可以有效识别酸性、中酸性、中基性等岩浆岩;本次系统圈定了具有地质意义的岩浆岩百余处,多数岩浆岩沿北东向与北西向断裂及其两侧分布,尤以断裂交汇部位最为发育,说明断裂对岩浆活动具有明显的控制作用;航空重磁揭示研究区发育较大规模的隐伏中基性火山岩,为区域基础地质研究和火山岩盆地油气藏资源评价提供了重要的地质-地球物理依据。Based on a comprehensive study of regional geology and geophysics,this study considers the gravity and magnetic anomaly responses of different types of magmatic rocks in the southern and surrounding areas of the Dayangshu Basin.The study uses the latest measured airborne gravity and magnetic integrated survey data,combines the results of field surveys and physical property measurements,and uses the techniques of field source separation and anomaly extraction such as polarizing,upward continuation,and vertical derivative.Thereby,the spatial distribution ranges are delineated,and the development characteristics,regularities of distribution,and controlling factors of regional magmatic rocks are revealed.The research shows that different types of magmatic rocks in the study region have different characteristics of aeromagnetic anomalies.The geophysical method used to highlight local gravity and magnetic anomalies can effectively identify acidic,intermediate-acidic,intermediate-basic,and other magmatic rocks.More than one hundred magmatic rocks of geological significance are delineated.Most of the magmatic rocks are distributed along the NE and NW trending faults and their two sides,especially at the intersection of the faults.This shows that faults have obvious controlling effects on magmatic activity.The airborne gravity and magnetism reveal that large-scale,concealed intermediate-basic volcanic rocks have developed in the study region.This study provides an important geological-geophysical basis for regional basic geological research and reservoir resource evaluation in volcanic rock basins.

关 键 词：航空重磁异常 火山岩 侵入岩 分布规律 大杨树盆地南部 

分 类 号：P318[天文地球—固体地球物理学]