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深部金属矿综合地球物理响应与综合预测方法——以金川超大型铜镍硫化物矿床为例

  • 曾昭发|周宁远|张建民|霍芷君|宫明旭
  • 作者单位:
  • 吉林大学地球探测科学与技术学院|吉林大学地球探测科学与技术学院|吉林大学地球探测科学与技术学院|吉林大学地球探测科学与技术学院|吉林大学地球探测科学与技术学院
  • 基金项目:

  • 国家重点研发项目(2016YFC0600505)
  • 详细信息:

  • 作者简介:
  • 曾昭发(1966—),男,广西全州人,教授,博士生导师,博士,研究方向为应用地球物理;主持的重大项目有国家重点基础研究发展计划(973计划)项目“兴蒙造山带构造叠合与大规模成矿作用”(2013CB429800),国家科技攻关项目“深部矿产资源评价理论与方法”(2016—2020),国家自然科学基金项目5项,国家“十二五”863计划重点项目“干热岩热能开发与综合利用关键技术研究”,吉林省新能源重大专项“深部地热资源(含干热岩)勘查与开发利用”,吉林省地勘基金项目“长白山玄武岩覆盖区地热资源调查”等30项科研
  • 通讯作者:
  • E-mail:zjm16@mails.jlu.edu.cn,18843199417
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Comprehensive geophysical responses and comprehensive prediction method for deep metal deposit—A case study of Jinchuan super-large Cu-Ni sulfide deposit

  • English Author:
  • College of Geoexploration Science and Technology,Jilin University|College of Geoexploration Science and Technology,Jilin University|College of Geoexploration Science and Technology,Jilin University|College of Geoexploration Science and Technology,Jilin University|College of Geoexploration Science and Technology,Jilin University
  • Unit:
  • 摘要
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  • 参考文献

摘要:

深部金属矿探测是目前资源勘查的重要方向,地球物理方法探测深度大、分辨率高,是深部金属矿探测最有效手段之一。以金川铜镍硫化物矿床为背景,在综合分析地质背景?⒀沂锢硇灾实幕∩希院酱攀萁辛硕喑叨确掷耄范嗽?/spanspan style=font-family:SimSun;>Ⅰ、Ⅱ、Ⅲ、Ⅳ矿区西南侧深部具有良好的找矿远景。综合利用航磁、重力、CSAMT剖面测量数据的反演结果,分析各方法异常特征,结合已知典型岩矿体分布,揭示了构造带附近的中低电阻率、高密度、高磁异常区为有利的找矿位置。根据该特征确定了深部找矿靶区,推测找矿靶区深度超过1 000 m,为钻探提供了重要依据。

关键词:

金川铜镍硫化物矿床;深部找矿;地球物理;CSAMT;重磁;联合反演

Abstract:

Deep metal deposit prospecting is an important direction of resource exploration at present,and the geophysical method is one of the most effective methods for deep metal deposit prospecting with deep reach and high resolution.In the case study of Jinchuan Cu-Ni sulfide deposit,on the basis of comprehensive analysis of geological setting and petrophysical properties,the aeromagnetic data are separated in a multiscale way,and the deep part of the southwest part of Ⅰ,Ⅱ,Ⅲ,Ⅵ districts is determined to have a good prospecting prospect.The data inversion results of aeromagnetic,gravity and controlled source audio frequency magnetotelluric sounding (CSAMT) survey profiles are comprehensively used to analyze the abnormal features of each method and the geophysical marks of typical ore bodies,the medium-low resistivity,high density and high magnetic anomalous area near the tectonic belt are revealed to be favorable spots for ore prospecting based on the distribution of known typical rock ore bodies.The target area of deep prospecting has been determined on the basis of the characteristics and the target area is estimated to be more than 1 000 meters deep.The study provides important basis for drilling.

Keywords:

Jinchuan Cu-Ni sulfide deposit;deep prospecting;geophysics;CSAMT;gravity and magnetic method;joint inversion