陕西省铧厂沟金矿床主矿带黄铁矿热电性特征及其地质意义  

Thermoelectric characteristics of pyrite from the main ore zone of the Huachanggou gold deposit,Shaanxi Province and its significance

作　　者：刘冲昊[1] 刘家军[1] 王建平[1] 吴杰[1] 王维钰 王立新[2] 于康伟 陈冬[3] 李志国[3] 

机构地区：[1]中国地质大学地质过程与矿产资源国家重点实验室,北京100083 [2]陕西略阳铧厂沟金矿,陕西略阳724312 [3]中国黄金集团公司,北京100011

出　　处：《地学前缘》2013年第4期264-272,共9页Earth Science Frontiers

基　　金：国家自然科学重点基金项目(41030423);中国地质调查局地质调查工作项目(1212011220924)

摘　　要：陕西省铧厂沟金矿是一个主要赋存于海底基性火山喷流细碧岩中的金矿床。文中系统研究了该矿床主矿带黄铁矿的热电性特征。主矿带成矿温度主要集中在130～330℃,属中—低温矿床;黄铁矿导电类型从早期到晚期由N型向P型转变;P型黄铁矿出现频率从浅部到深部呈减小趋势;金品位高值区与P型黄铁矿的高值区及热电系数离散度的低值区相对应;主矿带黄铁矿热电导型及热电性参数特征反映出主矿带开采区位于矿体中部偏下,向深处仍有一定规模的延伸。综合分析认为,0至2勘探线深部以及22～26勘探线深部发现新的富矿段的可能性较大。The Huachanggou gold deposit in Shaanxi Province mainly occurs in the submarine basic volcanic effusive spilite.On the basis of a study of the thermoelectric characteristics of pyrite,the authors put forward the following conclusions.The main ore zone is a low-medium temperature gold deposit,whose pyrite crystallization temperature is in the range of 130-330 ℃.The electric conduct assemblage type of the pyrite changes in the order of N-type to P-type from the early stage to the late stage.The frequence of P-type pyrites gradually decreases from the shallow part to the deep.The high average gold grade corresponds to the high frequence of P-type pyrites and low value of thermoelectrical coefficient dispersions.The characteristics of thermoelectricity imply that the lower to middle parts of the ore body have been exhumed until now,and there exists an extension of the main ore zone in the deep.Furthermore,the authors suggest that the better exploring prospect would be expectable in the depth of exploration line Nos.0,2 and Nos.22-26.

关 键 词：地质学 矿物学 黄铁矿 热电性 铧厂沟金矿 陕西省 

分 类 号：P574.1[天文地球—矿物学]