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

• Geophysics and Information Technology • Previous Articles     Next Articles

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

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

CLC Number: