质子探针分析方法研究矿石中微细粒金的赋存状态——以皖中沙溪斑岩铜(金)矿床为例  

STUDY ON THE OCCURRENCE OF MICROGRAINED GOLD IN MINERALS BY APPLICATION OF PROTON AND NUCLEAR MICROPROBES AS EXEMPLIFIED BY SHAXI PORPHYRY COPPER AND GOLD DEPOSIT,ANHUI

作　　者：杨晓勇[1] 王奎仁[1] 戴小平 杨学明[1] 孙立广[1] 

机构地区：[1]中国科学技术大学地球和空间科学系

出　　处：《高校地质学报》1998年第1期43-48,共6页Geological Journal of China Universities

基　　金：国家"八五"攀登计划"与寻找超大型矿床有关的基础研究"项目

摘　　要：本文应用先进的微束分析技术——质子探针分析方法对安徽中部沙溪斑岩铜（金）矿床中金的赋存状态进行系统的研究。结果表明，该斑岩铜（金）床中金的赋存状态以微细粒微米级的自然金形式存在，其载体矿物主要为黄铁矿和黄铜矿。本研究对斑岩铜（金）矿床中金的综合利用提供了理论上的依据，同时也为其它同类矿床中金的赋存状态提供了新的研究方法。Shaxi Porphyry copper deposit, located in the central Anhui Province, eastern China, is one of the important discoveries in the middle lower Yantse reaches in mid 1980s'. Gold mineralization also widely exists in the deposit. However, the occurrence of gold is not fully investigated and remains unknown at present. In this paper, gold occurrence has been studied by application of proton and nuclear microprobes in PIXE system. It shows that the gold in the porphyry copper deposit mainly occurs as micro grained native gold with μm grade, and the host minerals of gold are mainly pyrite and chalcopyrite. The results provide the theoretical evidence for the synthetical utilization of gold in porphyry copper deposits and a new method for the study of gold occurrence in other similar ore deposits.

关 键 词：质子探针 斑岩铜矿 金 赋存状态 金矿床 

分 类 号：P618.410.4[天文地球—矿床学] P618.510.2[天文地球—地质学]