个旧老厂矿区锡石单矿物地球化学、年代学研究与成矿意义浅析  

Geochemical and Chronological Studies on Single Mineral of Cassiterite in Gejiu Laochang Mining Area and Analysis of Its Metallogenic Significance

作　　者：卢智 罗健 LU Zhi;LUO Jian(Yunxi Honghe Resources Co.,Ltd.,Yunnan 661000,China)

机构地区：[1]云锡红河资源有限责任公司,云南个旧661000

出　　处：《世界有色金属》2024年第13期85-87,共3页World Nonferrous Metals

摘　　要：个旧锡矿是个超大型锡铜多金属矿床,锡石-硫化物型矿床,有含锡白云岩矿床、细脉带(俗称网状矿)矿床、层间氧化矿床、矽卡岩硫化物矿床及变基性火山岩铜矿床、含锡花岗岩型矿床砂锡矿床,在各矿床中均有发现锡石,但对锡石的研究较少。本文主要对个旧老厂矿区分析不同矿床类型锡石中锡的置换机制、锡石颜色与其化学组成的关系,确定锡矿床成矿年龄,研究锡石单矿物来区分不同类型锡石特征,进一步认识和了解锡矿床不同类型锡石结晶时的物理化学条件,区分矿床成因类型,建立个旧老厂矿区锡多金属矿床成矿模式,指导个旧矿区地质找矿工作。Gejiu tin-polymetallic deposit is a super large tin-copper polymetallic deposit,which belongs to the tin-stonesulfide type deposit.It includes cassiterite-bearing skarn deposits,vein-type deposits(commonly known as reticulate ore),interbedded oxidized ore deposits,silicate-carbonate-sulfide deposits,and copper deposits in varying basic volcanic rocks,as well as tin-bearing granite-type placer deposits.Tin minerals have been found in all these deposits,but research on tin minerals is limited.In this paper,the author analyzes the substitution mechanism of tin in different types of tin minerals,the relationship between the color of tin minerals and their chemical compositions in the old mining area of Gejiu,and determines the ore-forming age of the tin deposit.The study aims to differentiate the characteristics of tin minerals in different types of tin deposits using single mineral analysis,further understanding the physical and chemical conditions during the crystallization of tin minerals,differentiating the genetic types of deposits,establishing an ore-forming model for the old mining area of Gejiu tin-polymetallic deposit,and providing guidance for geological exploration in the Gejiu mining area.

关 键 词：锡石特征化学组成 成矿年龄 成矿意义 

分 类 号：P618.31[天文地球—矿床学]