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世界地质 2020, 39(2) 437-443 DOI: 10.3969/j.issn.1004-5589.2020.02.019 ISSN: 1004-5589 CN: 22-1111/P

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	大兴安岭
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重磁电三维反演在下嘎来奥伊河上游矿区中的应用

李少朋¹, 李桐林¹, 郑军², 陈汉波¹, 张忠禹³

1. 吉林大学地球探测科学与技术学院, 长春 130026;
2. 黑龙江省地球物理勘查院, 哈尔滨 150036;
3. 中国石油集团东方地球物理勘探有限责任公司, 天津 300457

摘要：以三维直流激发极化法为主，地面高精度磁法和高精度重力为辅，在黑龙江省大兴安岭呼中区下嘎来奥伊河上游矽卡岩矿区进行重、磁、电数据采集。对所采集到的数据进行三维反演，建立研究区域密度、磁化率、电阻率和极化率的三维地球物理模型。结合矿区地质情况，分析三维反演结果，判定本矿区成矿类型为早白垩世中酸性侵入岩与上元古界—下寒武统倭勒根岩群吉祥沟组大理岩形成的矽卡岩型矿床。通过分析矿区内两处已知矿体与三维反演结果的对应关系，笔者得出低阻、高极化率、高磁化率异常是寻找矽卡岩型矿体的重要标志。根据该找矿标志，在矿区内圈定一处新的成矿预测区，对该成矿预测区可以进一步研究。

关键词：大兴安岭下嘎来奥伊河矽卡岩型矿床三维反演成矿预测

Application of 3D inversion of gravity magnetism electric method in upper mining area of Xiagalai Aoyi River

LI Shao-peng¹, LI Tong-lin¹, ZHENG Jun², CHEN Han-bo¹, ZHANG Zhong-yu³

1. College of Geo-exploration Science and Technology, Jilin University, Changchun 130026, China;
2. Heilongjiang Geophysical Exploration Institute, Harbin 150036, China;
3. Bureau of Geophysical Prospecting INC., CNPC, Tianjin 300457, China

Abstract: Collect gravity, magnetic and electrical data in the skarn mining area in the upper of Xiagalai Aoyi River in Huzhong district, Great Xing'an Range Heilongjiang Province. It is mainly based on 3D DC induced polarization (IP) method, supplemented by high-precision magnetic method on the ground and high-precision gravity. Three-dimensional inversion are performed on the collected data, then density, magnetic susceptibility, resistivity and polarizability three-dimensional geophysical models of the study area are established. Based on the geological conditions of the mining area and analyzing the 3D inversion results, the authors determine that the mineralization type of this mining area is the skarn formed by the Early Cretaceous middle acidic intrusive rocks and the marble of the Jixianggou Formation of the Upper Proterozoic- Lower Cambrian Wolegen Group rock type deposit. By analyzing the correspondence between two known ore bodies in the mining area and the 3D inversion results, the authors conclude that low resistance, high polarizability, and high magnetic susceptibility anomalies are important signs for finding skarn-type ore bodies. According to the ore prospecting sign, a new metallogenic prediction area is circled in the mining area, and the metallogenic prediction area can be further studied.

Keywords: Great Xing'an Range Xiagalai Aoyi River skarn deposit three-dimensional inversion metallogenic prediction

收稿日期 2019-10-30 修回日期 2020-01-13 网络版发布日期

DOI: 10.3969/j.issn.1004-5589.2020.02.019

基金项目:

黑龙江省地质勘查科研项目（黑地勘科[2017]03）

通讯作者: 李桐林(1962-),男,教授,主要从事电磁法理论与应用的教学和研究。E-mail:litl@jlu.edu.cn

作者简介:

作者Email: litl@jlu.edu.cn

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