内蒙古东南部双尖子山矿区三维磁性结构及地质构造特征  

Three-dimensional Magnetic Structure and Geological Structural Characteristics of Shuangjianzishan in Southeastern Inner Mongolia

作　　者：贾正元[1] 王凤刚[2] 索奎 郭磊[4] 管烨[4] JIA Zhengyuan;WANG Fenggang;SUO Kui;GUO Lei;GUAN Ye(School of Geophysics and Information Technology,China University of Geosciences,Beijing 100083,China;Beijing Jinditong Testing Technology Co.,Ltd,Shougang Geological Exploration Institute,Beijing 100144,China;College of Geosciences and Engineering,North China University of Water Resources and Electric Power,Zhengzhou,Henan 450046,China;Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China)

机构地区：[1]中国地质大学(北京)地球物理与信息技术学院,北京100083 [2]首钢地质勘查院北京金地通检测技术有限公司,北京100144 [3]华北水利水电大学地球科学与工程学院,河南郑州450046 [4]中国地质科学院地质研究所,北京100037

出　　处：《现代地质》2023年第1期48-57,共10页Geoscience

基　　金：中国地质调查项目(DD20160125)。

摘　　要：双尖子山银铅锌矿位于大兴安岭中南段,是近年来该区域新发现的规模最大的银多金属矿,属热液型矿床并经历了多次矿化叠加。磁异常与金属矿有较强的相关性,磁性结构能够较好地反映控矿构造。本研究在各类先验信息约束下,对双尖子山铅锌矿区约1200 km^(2)的高精度磁法数据进行了定性分析,并通过三维物性反演计算,得到了该区域地下5 km内的三维磁性结构,初步揭示了深部构造特征。获得的认识如下:(1)研究区高磁性岩体主要分布在中部和西北部,呈北东—南西向条带状展布。(2)基于磁性结构,将研究区划分为4个主要构造单元和6个次级构造单元;(3)研究区总体断裂构造呈北东—南西走向,南部断裂构造转为北西—南东走向;(4)研究区中部和东南部有较大范围的隐伏岩浆岩,且以中酸性岩浆岩为主。The Shuangjianzishan Ag-Pb-Zn deposit,located in the middle-southern section of the Great Xing’an Range,is the largest silver-polymetallic deposit discovered in the region in recent years.It is a hydrothermal deposit that has undergone multistage mineralization.Magnetic anomaly has a strong correlation with mineralization,and the magnetic structure can well reflect the ore-controlling structures.In this study,building on various existing information,a three-dimensional inversion of high-precision magnetic data of about 1200 square kilometers in the study area is carried out,and the local three-dimensional magnetic structure within 5 km is obtained.The main conclusions are:(1)The high magnetic intrusion is mainly distributed in the middle and northwest,and shows a NE-SW-elongated distribution;(2)The study area comprises four major structural units and six sub-structural units;(3)The overall local fault structure shows as a NE-SW trend,and the southern fault structure changes to NW-SE trending;(4)There are various concealed magmatic rock units in the central and southeastern parts of the study area,which are mainly intermediate-felsic igneous rocks.

关 键 词：双尖子山矿区 银铅锌矿 三维磁性结构 

分 类 号：P631[天文地球—地质矿产勘探]