浙江遂昌地区金矿床矿物包裹体研究

对浙江遂昌地区所发现的金（银）矿床之矿物包裹体研究表明，其均一化温度多集中在１４０～２６０℃，成矿压力（０．２～０．６）×１０２ＭＰａ，气液比在５％～２７％。成矿流体为液态，矿液中主要有Ａｕ，Ａｇ，Ｃｕ，Ｐｂ，Ｚｎ，Ｂｉ，Ｋ，Ｎａ，Ｃａ，Ｓｉ．Ｍｇ，Ｈ２Ｏ，ＣＯ２．Ｃｌ，Ｆ，Ｓ，Ｍｎ，Ｌｉ．Ｔｉ，Ｃｒ，Ｃｏ，Ｎｉ等组分。成矿时的含矿流体呈弱酸性─中性（ｐＨ４．５６～５．１４），盐度较高（ＮａＣｌ（２０～３２）ｗＢ％）．根据这些特征，并综合其产出的大地构造环境及成矿地质条件，认为该区所产出的金（银）矿床在成因上属地洼型火山─次火山中（─低）温热液矿床。

STUDY ON THE MINERAL INCLUSIONS FROM THE GOLD ORE DEPOSITS,SUICHANG ORE FIELD,ZHEJIANG PROVINCE

By the systematical study on the mineral inclusions taken from the different types of gold ore deposits,which developed in Suichang ore field,Zhejiang province,it has been showed that no matter what differences are there in the wall rocks and the mineralizational characteristics among those deposits,the homogenization temperature of the mineral inclusions is centred in 140￣260 ℃,the metallogenic pressure is(0.2～0.6)×102MPa,the mineralization fluid is liquid with the ratio value 5%～27% of gas to liquid and is composed of Au,Ag,Cu,Pb,Zn,Bi,K,Na,Ca,Mg,Si,H2O,CO2,Cl,F,S,Mn,Li,Ti,Cr,Co,Ni,et al.,the fluid is of week acid-intermediate(pH 4.56～5.14) and has a higher salinity(20～32 NaCl wB%).All above statements combining with the geotectonic setting and geological features of those deposits support the conclusion that all of the deposits occurring in the district genetically belong to the volcanic-subvolcanic mesothermal(-telethermal)gold ore deposits of geodepression(diwa)type advanced by Chen Guo-Da.