欢迎访问现代地质!

现代地质 ›› 2023, Vol. 37 ›› Issue (01): 48-57.DOI: 10.19657/j.geoscience.1000-8527.2022.072

• 地球物理与信息技术 • 上一篇    下一篇

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

贾正元1(), 王凤刚2, 索奎3(), 郭磊4, 管烨4   

  1. 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
  • 收稿日期:2022-03-10 修回日期:2022-10-04 出版日期:2023-02-10 发布日期:2023-03-20
  • 通讯作者: 索奎,男,讲师,1987年出生,勘查技术与工程专业,主要从事应用地球物理重磁数据处理研究。Email:317270823@qq.com。
  • 作者简介:贾正元,男,高级实验师,1981年出生,勘查技术与工程专业,主要从事应用地球物理重磁数据处理研究。Email:jzy@cugb.edu.cn
  • 基金资助:
    中国地质调查项目(DD20160125)

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

JIA Zhengyuan1(), WANG Fenggang2, SUO Kui3(), GUO Lei4, GUAN Ye4   

  1. 1. School of Geophysics and Information Technology, China University of Geosciences, Beijing 100083, China
    2. Beijing Jinditong Testing Technology Co., Ltd, Shougang Geological Exploration Institute, Beijing 100144, China
    3. College of Geosciences and Engineering, North China University of Water Resources and Electric Power, Zhengzhou, Henan 450046, China
    4. Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China
  • Received:2022-03-10 Revised:2022-10-04 Online:2023-02-10 Published:2023-03-20

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 km2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。

关键词: 双尖子山矿区, 银铅锌矿, 三维磁性结构

Abstract:

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.

Key words: Shuangjianzishan deposit, Ag-Pb-Zn deposit, three-dimensional magnetic structure

中图分类号: