东昆仑德尔尼铜矿喷流岩——铁硅质岩的发现及其成矿意义  

Discovery of exhalative rock—ferro-siliceous rock in the Deerni copper deposit of East Kunlun Mountains and its metallogenic significance

作　　者：宋忠宝[1] 栗亚芝[1] 陈向阳[1] 陈博[1] 任有祥[1] 张雨莲[1] 张晓飞[1] 

机构地区：[1]中国地质调查局西安地质调查中心,陕西西安710054

出　　处：《地质通报》2012年第7期1170-1177,共8页Geological Bulletin of China

基　　金：中国地质调查局地质大调查项目<青海省岩浆岩时空分布与成矿作用研究>(编号:科〔2011〕02-46-02)和工作项目<青海省地质调查综合研究>(编号:1212010918044)

摘　　要：德尔尼地区的"炭质(砂)板岩"是一个使用了30多年的岩石名称,前人把这类岩石当作与成矿并无任何关系的一种沉积岩。本次工作发现并证实这类岩石进一步可分为2种:一种为陆源碎屑岩,即正常沉积岩——炭质(砂)板岩,与成矿无直接关系;另一种为海底喷流作用形成的一种喷流岩——铁硅质岩。由此推断德尔尼大型铜(钴)矿床,是一个以海底喷流-沉积成矿为主体的后期有叠加成矿的多期成矿作用形成的矿床。这在德尔尼地区寻找该类矿床有重要的理论意义和指导意义。＂carbonaceous sand slate＂ in Deerni area is a rock name used for more than 30 years,because this kind of rock is irrelevant to mineralization.Through detailed research work,the authors discovered that this kind of rock can be divided into two kinds： one is terrigenous clastic rock,which is a kind of normal sedimentary rock,i.e.,carbonaceous sandy slate,having no direct relationship with mineralization,whereas the other is exhalative rock formed by submarine exhalation—ferro-siliceous rock.It is thus inferred that the Deerni large-size Co-Cu deposit was mainly formed by submarine exhalative-sedimentation and was later enriched by superimposition of multi-stage mineralization.This discovery has important theoretical and guiding significance in search for such ore deposits in Deerni area.

关 键 词：炭质(砂)板岩 喷流岩 铁硅质岩 海底喷流-沉积作用 矿床成因 德尔尼铜矿 

分 类 号：P588.2[天文地球—岩石学] P618.41[天文地球—地质学]