额尔古纳成矿带大梁金矿矿床成因探讨  

Discussion on the genesis of the Daliang gold deposit, Erguna metallogetic belt,Inner Mongolia

作　　者：王召林[1] 金浚[2,3] 刘正桃 刘铁成 

机构地区：[1]有色金属矿产地质调查中心,北京100012 [2]北京矿产地质研究院,北京100012 [3]中色地科矿产勘查股份有限公司,北京100012

出　　处：《矿产勘查》2014年第2期195-206,共12页Mineral Exploration

基　　金：中国地质调查局地质调查项目(编号:1212011120680;1212011140064)资助

摘　　要：额尔古纳成矿带是重要的有色金属、贵金属分布区。文章初步论述了大梁金矿床的矿床成因。新元古界南华系佳疙瘩组是金元素富集的重要层位,额尔古纳剪切带和加疙瘩剪切带是区内两条重要的剪切变形带,是控制金矿产出的构造要素;大梁金矿的赋矿岩石是佳疙瘩组绢云母绿泥板岩、绢云母千枚岩,金矿体受走向约330°的右行剪切带控制;大梁金矿4条矿化蚀变带(SⅠ、SⅡ、SⅢ及SⅣ)受控于复式褶皱,SⅠ位于紧闭背斜倒转翼,SⅡ位于向斜倒转翼,SⅢ、SⅣ位于向斜两翼;划分了大梁金矿SⅠ矿带矿床成因模式的3个阶段:金属元素初始富集阶段、韧性剪切变形阶段、片理化阶段。The Erguna metallogenic belt is a significant metallogenic province of nonferrous and precious metals resources.The paper preliminarily discusses the genesis of Daliang gold deposit.The Jiageda formation of Neo-Proterozoic Nanhua system is an important accumulation zone of gold element.The Erguna shear zone and Jiageda shear zone are the most two important shear zones and main structural factors to control gold mineralization in this area.The host rocks of Daliang gold deposit are sericite-chlorite slate and sericite phyllite of Jiageda formation,and the gold ore bodies,which are controlled by right-lateral shear zone along NW330°trending,lie in the mylonitizational altered rocks.The four altered mineralized zones,i.e.,S Ⅰ,S Ⅱ,SⅢ and SⅣ,are controlled by complex folds.Among them,S Ⅰ and S Ⅱ zones are located in the overturned limbs of anticlines and synclines respectively,while S Ⅲ and SⅣ zones located in the limbs of synclines.Based on the systematic study,the genetic model of the SⅠ orebody in the Daliang gold deposit is subdivided into three stage：a,initial enrichment stage of mineralization element; b,ductile and sheared deformation stage; c,structural foliation stage.On the base of geophysical and geochemical exploration,the prospecting targets are outlined for the further exploration in the deposit area.

关 键 词：额尔古纳构造带 剪切带 大梁金矿 矿床成因 

分 类 号：P618.51[天文地球—矿床学]