山东乳山金青顶金矿床金的赋存状态研究

Study on the Occurrence of Gold Ore in Jinqingding Gold Deposit in Rushan in Shandong Province

摘要:

山东乳山金青顶金矿床是一种硫化物石英脉型金矿床，富含黄铁矿，研究黄铁矿中金矿物特征，可以为金矿的勘探、矿石的选冶以及矿床成因提供理论支撑。本文通过电子探针能谱仪和波谱仪对金青顶金矿黄铁矿中金矿物的矿物学特征、化学成分和赋存状态进行了精细研究，探讨了黄铁矿与金矿的成因关系。结果表明金主要以自然金和碲金银矿的形式存在，另含少量的碲金矿，包裹在黄铁矿之中或者充填在黄铁矿的裂隙中。金矿物的形成可能是成矿流体体系达到金的过饱和从而直接沉淀所形成。

Abstract:

Jinqingding gold deposit in Rushan is a sulfide-quartz vein type gold deposit. It is rich in pyrite. Studying the characteristics of gold minerals in pyrite can provide theoretical support for gold exploration, processing and smelting of ore and the origin of the deposit. In this paper, the mineralogical characteristics, chemistry and occurrence of gold in pyrite of Jinqingding gold deposit have been studied by using the electron probe microanalysis (EPMA) with WDS and EDS, and the relationship between pyrite and gold has been discussed. It is showed that major gold minerals are natural gold and petzite, and a small amount of calaverite, which included in pyrite or inserted in the cracks of pyrite. The formation of gold minerals may be due to the supersaturation of gold in the ore-forming fluid system.