安徽石芒坑金矿床的成因及矿石的工艺矿物学研究  

Study on the Genesis of Gold Deposit and Process Mineralogy of Ore in Shimangkeng,Anhui Province

作　　者：周雪斐[1] 陈佳 段百吉 ZHOU Xuefei;CHEN Jia;DUAN Baiji(Geological No.322 Team of Anhui Provincial Bureau of Geology and Mineral Exploration;State Key Laboratory of Safety and Health for Metal Mines)

机构地区：[1]安徽省地质矿产勘查局322地质队 [2]金属矿山安全与健康国家重点实验室

出　　处：《现代矿业》2022年第8期147-150,163,共5页Modern Mining

摘　　要：为更好地指导找矿工作,实现精准靶向找矿,通过对泾县石芒坑金矿床矿石进行工艺矿物学研究,可知该矿床金矿体主要赋存于花岗闪长斑岩岩脉和志留系唐家坞组地层的接触带上,金矿物多为银金矿和自然金,“可见金”的嵌布粒度以显微极微粒金为主,金的赋存状态以包裹金为主,其次为粒间金和裂隙金;与成矿关系最密切的蚀变矿化主要为黄铁矿化、褐铁矿化、硅化,尤以硅化关系最为密切;矿床的主要成因为硅化角砾岩型金矿床。In order to better guide the prospecting work,and achieve precise and targeted prospecting,through to the ore process mineralogy research on Shimangkeng gold deposit in Jing county,it can be seen that the gold orebodies in this deposit mainly occur in the contact zone between granodiorite porphyry dike and Silurian Tangjiawu Formation.Gold minerals are mostly electrum and natural gold,and the embedded grain size of"visible gold"is mainly microscopic ultrafine gold.The occurrence state of gold is mainly inclusion gold,followed by interparticle gold and fissure gold.The alteration mineralization most closely related to mineralization mainly includes pyritization、limonitization and silicification,especially the silicification.The main types of the deposit is silicified breccia gold deposits.

关 键 词：岩矿鉴定 金矿 银金矿 可见金 矿物共生次序 

分 类 号：P618.51[天文地球—矿床学] P575[天文地球—地质学]