地质与勘探2025，Vol.61Issue(2)：346-358,13.DOI:10.12134/j.dzykt.2025.02.011
四川张家坪子金矿床黄铁矿热电性特征及其地质意义
Thermoelectric Characteristics and Geological Significance of Pyrite in the Zhangjiapingzi Gold Deposit,Sichuan Province
摘要
Abstract
The Zhangjiapingzi gold deposit is a large-scale gold deposit within the Mianxi gold ore cluster in Sichuan Province.After years of exploration,the ore body has been exposed up to an elevation of 2600 meters above sea level,where mineralization is still present.Based on field geological surveys,this article systematically collected pyrite samples from multiple deep boreholes for in-situ pyrite thermoelectric testing.By studying the thermoelectric characteristics of pyrite at different elevations,a scientific basis is provided for deep mineral exploration.The results show that the thermoelectric coefficient dispersion of Zhangjiapingzi pyrite remains relatively stable but overall tends to be large(standard deviation>20).The thermal conductivity type of pyrite at different elevations is mainly P-type,indicating that the deposit is still in a shallow position,and there may be N-type deposits in some areas(at elevations of 2698 m and 2863 m)that are possible overlapping parts of the ore body.The formation temperature of pyrite is relatively low,indicating that it is still located in the shallow low-temperature layer as a whole.There is a phenomenon of overlapping high and low temperatures at the beginning and end of the ore body locally.The thermal conductivity gradient Y value of deep pyrite is relatively small,and the erosion degree of the deposit is only about 50%based on the calculated erosion rate(γ).Based on various thermoelectric parameters,we believe that the Zhangjiapingzi gold deposit has great mineralization potential,and the deep areas controlled by faults and the lateral extension direction of the ore body are favorable exploration spaces.关键词
黄铁矿/热电性/成矿潜力/深部找矿/张家坪子金矿床/四川Key words
pyrite/thermoelectricity/metallogenic potential/deep prospecting/Zhangjiapingzi gold deposit/Sichuan Province分类
地质学引用本文复制引用
刘蓓蓓,陈辉,赖川,朱伟,庞成斌,庞振山,吴金检,陈雨萌,石光耀,俞炳..四川张家坪子金矿床黄铁矿热电性特征及其地质意义[J].地质与勘探,2025,61(2):346-358,13.基金项目
中地调研项目(编号:[2024]390)、四川省自然资源投资集团项目(编号:[2024]190、[2024]316)和中国地质调查局项目(编号:DD20230356)联合资助. （编号:[2024]390）
