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

西秦岭马坞金矿床韧性剪切带构造控矿特征

  • 曹东宏 ,
  • 崔龙 ,
  • 辛小军 ,
  • 朝银银
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  • 武警黄金第五支队,陕西  西安   710100
曹东宏(1968-),男,陕西眉县人,高级工程师,从事金矿地质勘查与研究工作。CDH_19680229@126.com

收稿日期: 2015-12-27

  修回日期: 2016-06-27

  网络出版日期: 2017-01-22

基金资助

中国地质调查局地质调查子项目“甘肃岷县寨上—马坞金矿整装勘查区专项填图与技术应用示范”(编号:1210114050301)资助

Ore-controlling Characteristics of Ducitile Shear Zone Structure in Mawu Gold Deposit,Western Qinling

  • CAO Donghong ,
  • CUI Long ,
  • XIN Xiaojun ,
  • CHAO Yinyin
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  • No.5 Gold Geological Party of CAPF,Xi'’an   710100,Shaanxi,China

Received date: 2015-12-27

  Revised date: 2016-06-27

  Online published: 2017-01-22

摘要

马坞金矿床位于西秦岭礼(县)—岷(县)成矿带西段,是近年发现的一个中型微细浸染型金矿床。矿体产出受NWW向脆韧性剪切带控制,赋矿围岩为中泥盆统何家店组千枚岩与灰岩。马坞金矿床成矿构造以剪切动力系统为主导因素,次级韧—脆性剪切构造控制着金矿化蚀变带和矿体的产出,地层和岩石构造的韧性剪切变形变质特征非常典型,从矿源层、流体性质及来源、矿体形态和矿石类型等方面来看,均体现了韧性剪切带型金矿的特征。在“富金地层—剪切带—岩浆活动”三位一体联合作用下形成中低温微细浸染型矿床,矿体被剥蚀到中部偏下部位,向深部仍有一定规模的延伸。

本文引用格式

曹东宏 , 崔龙 , 辛小军 , 朝银银 . 西秦岭马坞金矿床韧性剪切带构造控矿特征[J]. 黄金科学技术, 2016 , 24(6) : 24 -31 . DOI: 10.11872/j.issn.1005-2518.2016.06.024

Abstract

Mawu gold deposit is a medium-sized fine disseminated gold deposit discovered in recent years,located in western segment of Western Qinling Li-Min metallogenic belt.The orebody is controlled by NWW trending faults,with the wall rocks consisting of phyllite and limestone in Hejiadian Group of Middle Devonian.The shear dynamic system is the leading factor of metallogenic structure in Mawu gold deposit,the secondary ductile-brittle shear structure of the deposit controlled the occurrence of gold mineralization alteration zones and the orebody.The ductile shear deformation and metamorphism characteristics of the strata and rocks are very typical.The source bed,fluid nature and origin,orebody morphology and ore types were reflected the characteristics of ductile shear zone type gold deposit.Under the combined effect of trinity“gold-rich strata,shear zone,magmatic activity”,formed low temperature micro-disseminated-type deposits.The orebody was eroded to the middle position and downwards,there was still some scale extends to the deep.

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