摘要
石硐沟银铅锌多金属矿位于北祁连造山带和中祁连隆起带的衔接处西端南缘,严格受NW向石硐沟断裂控制,为一大型低温热液矿床。结合区内地质工作成果,分析了成矿地质背景、矿区地质特征,在此基础上,通过分析矿床赋矿岩石Ag含量分布特征、矿区水平和垂向Ag含量分布特征、Ag的载体矿物种类和粒度特征,讨论了矿体Ag的赋存规律。研究表明:1Ag主要以微—细粒银锑黝铜矿的形式赋存于方铅矿中,赋矿岩石以硅化灰岩为主,次为硅化绢云母千枚岩;2在水平、垂向上,Ag与Pb含量变化特征基本保持一致,与Zn含量相关性不明显,且Ag品位与矿体厚度呈一定的负相关。上述分析对于区内多金属矿找矿工作有一定的参考价值。
Shigonggou Ag-Pb-Zn polymetallic deposit is located in the south of west section between north Qilian orogenic belt and Middleqilian upfold belt,and it is strictly controlled by NW-direction fracture,it is a middle-low temperature large hydrothermal deposit.Combing with some related geological working results in the mining area,the regional metallogenic background,geological characteristics of the mining area are analyzed,based the above analysis results,the occurrence regularity of Ag in Shidonggou Ag-Pb-Zn polymetallic deposit is discussed by analyzing the distribution characteristics of Ag contents in the host rocks of deposits,horizontal and vertical distribution characteristics of Ag contents in the mining area,carrier mineral types and grain size characteristics of Ag.The analysis results show that：1 micrograined Ag-antimony fahlore of galena is the main mineral of Ag,its main host rock is silicified limestone,and the secondly one is silicified sericite-phyllite; 2the contents characteristics of Ag is basically consistent to the one of Pb,but the relationship between the contents of Ag and Zn is not obvious,besides that,the contents of Ag has negative correlative with its ore-body thickness.The above analysis results related to the geological characteristics and occurrence regularity of Ag in Shidonggou Ag-Pb-Zn polymetallic deposit in Subei county have some reference for the further prospection work of polymetallic in the mining area.
出处
《现代矿业》
CAS
2017年第1期60-63,共4页
Modern Mining
关键词
银铅锌矿床
成矿地质背景
地质特征
赋存规律
Ag-Pb-Zn deposit
Metallogenic geological background
Geological characteristics
Occurrence regularity
