ISSN 1005-2518
CN 62-1112/TF
矿产勘查与资源评价

马达加斯加金矿床成因及找矿标志研究

  • 杨喜安 ,
  • 刘善宝 ,
  • 赵宪东
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  • 1.中国地质科学院矿产资源研究所,北京   100037;
    2.山东正元地质勘查院,山东  烟台   264002
杨喜安(1972-),男,宁夏海原人,博士,从事矿床学研究工作.yangxianyantai@163.com

收稿日期: 2013-11-29

  修回日期: 2014-02-17

  网络出版日期: 2014-08-26

基金资助

中国博士后科学基金项目“马达加斯加Maevatanana金矿床成因研究”(编号:2013M541000)和中国地质调查局地质大调查项目“全球巨型成矿带找矿勘查方法技术研究”(编号:12120113102100)联合资助.

Research on Genesis and Prospecting Indicators of Gold Deposits in Madagascar

  • YANG Xi’an ,
  • LIU Shanbao ,
  • ZHAO Xiandong
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  • 1.Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing   100037,China;
    2.Shandong Zhengyuan Institute of Geological Exploration,Yantai   264002,Shandong,China

Received date: 2013-11-29

  Revised date: 2014-02-17

  Online published: 2014-08-26

摘要

马达加斯加金矿床类型为石英脉型,金矿化包括含金石英脉及其两侧的矿化围岩,金矿体产在NNW向剪切带和EW向断层交会处。金成矿作用主要与泛非造山运动有关。在泛非造山期,马达加斯加发生了强烈的构造岩浆活动,地壳深部含金硅铝质岩发生部分熔融形成花岗质岩浆。花岗质岩浆从岩石中萃取成矿组分,形成含矿热液流体。沿断裂上升的热液流体与地下含矿热水混合,构成岩浆水与大气降水的混合成矿流体,这些成矿流体进入构造有利空间,充填和交代围岩,形成含金石英脉。

本文引用格式

杨喜安 , 刘善宝 , 赵宪东 . 马达加斯加金矿床成因及找矿标志研究[J]. 黄金科学技术, 2014 , 22(2) : 1 -6 . DOI: 10.3969/j.issn.1005-2518.2014.02.001

Abstract

The gold deposit in the Madagascar is a classical quartz vein type gold deposit,the gold mineralization developed in the quartz vein and its wall rock.The gold deposit is intersected by major NNW trending shear zones and east-trending fracture sets,gold mineralization is associated with Pan-African orogeny.In the Pan-African orogeny,there are intensive tectonic-magmatic in Madagascar,results partial melting of the lower crust,a large amount of fluids and granitic magma are formed.In the process of the ascent of the fluids,mixed shallow-sourced meteoric fluid,the ore-forming fluids would have entered the favourable faults,resulting in mineralization.

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