胶东焦家金矿带招贤金矿床的原位黄铁矿热电性特征及找矿指示意义OA北大核心CSTPCD

The Jiaodong gold district is an important Au producing area in China. A large number of large gold deposits occur in the Jiaojia gold belt,and its resources occupy a quarter of the whole Jiaodong district. The Zhaoxian gold deposit is a large gold deposit discovered in the outer and deep part of the Jiaojia belt. Evaluating the deep mine-ralization potential of this gold deposit may provide key insight into the deep exploration and prediction of many gold deposits in the Jiaodong gold district. In this study,ore samples from 6 different elevations in 3 boreholes in the Zhaoxian gold deposit were collected,and detailed mineralogy,ore-forming elements,and thermoelectric characteristics of pyrite were studied. Through SEM and semi-quantitative composition analysis,it is identified that electrum is the main Au minerals,which usually occurs in the form of inclusion in pyrite or its cracks. A large number of hydrothermal accessory minerals are associated with pyrite,and the alteration zoning of the wall rock is obvious,showing strong mineralization. The mineral association and multi-stage ore-forming characteristics are similar to other super large gold deposits in Jiaodong. Through the analysis of ore-forming elements such as Au,it is considered that Au and its highly correlated elements have regular vertical variation characteristics,and the element precipitation has vertical discontinuity. The thermoelectricities of pyrite were accurately determined by in-situ test method,and the ore-forming potential of different orebody was comprehensively discussed by cal-culating and analyzing the dispersion degree of coefficient,pyrite type,formation temperature and elongation in-dex. The results all indicate that the Zhaoxian gold deposit and the deep of the Jiaojia gold belt have good pros-pecting potential.