浙江省遂昌治岭头金矿地质特征及矿床成因分析

Analysis of geological characteristics and deposit genesis of Zhilingtou gold mine,Suichang County,Zhejiang Province

浙江省治岭头地区矿产丰富,形成了贵金属金、银,有色金属铅、锌、铜、钼、硫铁矿等矿产组合。发育的金银矿体呈复脉状,赋存于八都群脆韧性断裂中。金银矿石矿物由金属矿物及脉石矿物组成,金属矿物主要有金银矿、辉银矿、黄铁矿,其次有少量的磁铁矿等组成。金银矿石结构为他形晶粒状结构、半自形晶粒结构、压碎结构等,金银矿石构造以块状构造、角砾状构造为主。矿化蚀变的主要类型有硅化、绢云母化、绿泥石化、黄铁矿化。结合研究区所处大地构造位置和矿石矿物组合特征,认为治岭头金矿床为区域变质热液成矿,后期岩浆热液叠加富集。

The Zhilingtou area is rich in minerals,forming a combination of precious metals such as gold and silver,and non-ferrous metals such as lead,zinc,copper,molybdenum and sulphide iron ore.The developed gold and silver ore bodies are in the form of complex veins,which are endowed in the brittle and ductile fractures of the Badu Group.Gold and silver ore minerals consist of metal minerals and veinstone minerals.Metallic minerals are mainly gold and silver ore,pyroxene,pyrite,followed by a small amount of magnetite and other components.The structure of gold and silver ore is he-shaped grain structure,semi-autonomous grain structure,crushed structure,etc.;the gold and silver ore structure is dominated by massive structure,breccia structure.The main types of mineralisation and alteration are silicification,sericification,chlorite and pyrite.Combined with the geotectonic position of the study area and the characteristics of the mineral assemblage of the ore,it is believed that the Zhilingtou gold deposit is a regional metamorphic hydrothermal mineralisation,with superimposed enrichment of magmatic hydrothermal fluids at a later stage.