福建吉花银矿床矿石特征及银的赋存状态  

Ore characteristics and silver occurrence state of Jihua silver deposit in Fujian

作　　者：黄卫强 侯海峰[1] 杜庆安[1] 高小雷 何世军[1] HUANG Weiqiang;HOU Haifeng;DU Qing'an;GAO Xiaolei;HE Shijun(The Second Geological Exploration Institute of China Metallurgical Geology Administration,Fuzhou 350108,Fujian,China)

机构地区：[1]中国冶金地质总局第二地质勘查院,福建福州350108

出　　处：《矿产与地质》2022年第3期541-546,共6页Mineral Resources and Geology

基　　金：中国冶金地质总局第二地质勘查院“福建省尤溪县吉花矿区金银矿详查、勘探项目”(2013—2021年)。

摘　　要：在野外地质调查和总结矿床地质特征的基础上,通过物相鉴定和化学分析,对吉花银矿床的矿石特征及银的赋存状态进行了深入研究。研究结果表明,该矿床的矿石类型以原生硫化物矿石为主,地表及构造地段见少量氧化矿石;矿石中矿物种类多样,金属矿物主要以黄铁矿为主,次为赤铁矿、褐铁矿、少量黄铜矿及金银矿物等;非金属矿物有石英、黑云母、白云母等;黄铁矿和石英是重要的载银矿物。银的赋存状态主要有矿物银和分散银,矿物银占95.0%,分散银占5.0%,银主要以矿物银形式赋存在自然银、辉银矿、硫锑铜银矿等矿物中,其中以辉银矿为主,少量自然银、硫锑铜银矿,这些矿物又主要呈微细粒-细粒状(2~52μm)嵌布在黄铁矿和石英中,分散银以难溶矿物中包裹银为主,少量氧化银中银。On the basis of the field geological survey and the summary of geological characteristics of the deposit,the ore characteristics of Jihua silver deposit and the occurrence state of silver have been studied in depth through the identification of phases and chemical analysis.The research result shows that the ore type of this deposit is mainly primary sulfide ore,and a small amount of oxide ore is found on the surface and structural sections.The minerals in the ore are diverse,and the metal minerals are mainly pyrite,followed by hematite and limonite,a small amount of chalcopyrite and gold and silver minerals,etc.Non-metallic minerals include quartz,biotite,muscovite,etc.Pyrite and quartz are important silver-bearing minerals.The occurrence state of silver mainly includes mineral silver and dispersed silver,mineral silver accounts for95.0%,and dispersed silver accounts for 5.0%.Silver mainly occurs in the form of mineral silver in minerals such as natural silver,argentite,polybasite,among which arginite is the main,and a small amount of natural silver and polybasite,and these minerals are mainly embedded as fine-grained(2~52μm)in pyrite and quartz.The dispersed silver is mainly silver wrapped in insoluble minerals,and a small amount of silver in silver oxide.

关 键 词：吉花银矿床 矿石特征 赋存状态 福建 

分 类 号：P618.52[天文地球—矿床学]