安徽铜陵冬瓜山铜矿床主成矿元素及伴生金银的赋存状态研究  

Study on the Occurrence State of Main Metallogenic Elements and Associated Gold and Silver in Dongguashan Copper Deposit,Tongling,Anhui Province

作　　者：文雪华 WEN Xue-hua(Sichuan Academy of Land Science and Technology,(Sichuan Satellite Application Technology Center),Chengdu 610045)

机构地区：[1]四川省国土科学技术研究院(四川省卫星应用技术中心),成都610045

出　　处：《四川地质学报》2023年第2期243-246,共4页Acta Geologica Sichuan

摘　　要：本文运用原位分析技术扫描电子显微镜(SEM)及其配套的背散射电子像功能,特征X射线线扫描、面扫描功能,研究冬瓜山铜矿主成矿元素赋存矿物及伴生金、银赋存矿物的形貌背散射电子像、能谱图,线、面分布图像及各元素的含量特征,初步查明了冬瓜山铜矿主成矿元素与伴生金、银的赋存状态。结果表明:主成矿元素铜、铁、硫以黄铜矿形式存在,另外铁、硫元素主要以黄铁矿形式存在。伴生金元素均独立金矿物自然金、银金矿、碲金银矿等三种金矿物形式存在,银元素以银金矿、碲银矿、硫银铋矿等三种独立矿物形式存在。黄铜矿以它形-它形粒状结构嵌布于非金属矿物或黄铁矿中,或以包裹体形式被黄铁矿包裹。独立金矿物多以包裹体提形式存在,被包裹在黄铁矿中,粒径8~40μm。银矿物主要为硫银铋矿和碲银矿:硫银铋矿呈不规则状镶嵌在黄铁矿中,粒径约10μm;碲银矿沿黄铁矿的晶间裂隙分布,为后期成矿作用的产物。上述伴生成矿元素赋存状态的研究成果,对冬瓜山矿床的成矿机制、矿山选矿、矿产资源综合利用与合理开发等方面起到了指导性作用。In this paper,using the in situ analysis technology of Scanning Electron Microscope(SEM),Electron Back Scattering,X-ray Line Scan and Mapping technology to research the contents of the main metallogenic elements mineral and associated gold and silver minerals,the morphology and the occurrence state of the Dongguashan copper.The results show that the main metallogenic elements copper,iron and sulfur exist in the form of chalcopyrite,and iron and sulfur mainly exist in the form of pyrite.The associated gold elements exist in natural gold,electrum and petzite,while the silver elements exist in electrum,hessite and peruvite.Chalcopyrite is embedded in non-metallic minerals or pyrite in anhedral granular texture,or encapsulated by pyrite in the form of inclusions.The independent gold mineral mostly exist in the form of inclusion,encapsulated in pyrite,and the particle size is 8-40μm.Silver minerals are mainly peruvite and.Peruvite is irregularly embedded in pyrite with a particle size of about 10um;while hessite distributed along the intercrystalline fracture of pyrite,in the late mineralization stage.The above research results of the occurrence state of the associated metallogenic elements have played a guiding role in the metallogenic mechanism,mineral processing,comprehensive utilization and reasonable exploitation of mineral resources of Dongguashan deposit.

关 键 词：冬瓜山铜矿床 主成矿元素 伴生金银 赋存状态 

分 类 号：P618.41[天文地球—矿床学]