西昌市木里县红土坡砂金矿地质特征及成因浅析

Geological Characteristics and Genesis of the Hongtupo Placer Gold Mineral Deposit in Muli county,Xichang

砂金矿位于松潘—甘孜地槽褶皱系,矿区经过多次构造运动,使得该区域成矿物质较易富集,为矿床提供物源。该砂金矿属于冲击型成因砂金矿,成矿物质来自上游的岩溶型耳泽金矿,形成时代为第四纪,由于形成的各方面条件都非常理想,所以矿床品味相当高,估算超过0.52g/m^3,远远超过了砂金矿的工业品味。本文扼要地论述了红土坡勘查区地质特征和红土坡砂金矿的地质特征及其地球化学特征,通过对红土坡砂金矿的调查,研究及验证砂金矿的成矿的有利条件,并分析了红土坡砂金矿形成过程。

MuLi County＇s hongtupo piacer gold deposit is located in Songpan Ganzi geosynclinal fold system, in Xichang.There has been suffered many times of tectonic movement, which making the regional metallogenic substances is easy to enrichment and become the material source of the deposit. This placer gold deposit belongs to alluvial causes gold dust. The ore-forming material comes from upstream of the karstic Erze gold deposit, formed during Quaternary. Due to the formation of the various conditions are very ideal, the deposit taste is quite high, which estimated more than 0.52 g/m^3, far more than the placer gold industrial taste. This paper briefly discusses the geological characteristics of prospecting area and Hongtupo placer gold deposit＇s geological characteristics and geochemical characteristics. Through the survey of Hongtupo placer gold,we studied and verificated the metallogenic conditions of placer gold, and analyzed the Hongtupo placer gold ore forming process.