黄铁矿热电性研究在谢家沟金矿评价中的应用

Applications of Pyrite Thermoelectricity on Xiejiagou Gold Deposit Assessment

谢家沟金矿是胶东地区新发现的大型金矿床,矿床类型为“焦家式”与“玲珑式”的过渡类型。对矿床3种主要矿石类型、不同中段的22个矿石样品进行了黄铁矿热电性测试,结果表明黄铁矿以N型导电为主,早期形成的黄铁绢英岩中黄铁矿热电系数最大,主成矿阶段形成的黄铁矿—黄铜矿绢英岩次之,晚期的黄铁矿—黄铜矿石英脉最小;从+130m中段到+242m中段,N型黄铁矿的出现率逐渐变小,热电系数也随之下降,认为矿体的浅部已被剥蚀,N型黄铁矿出现率表现较好的连续性说明深部资源潜力很大。

Xiejiagou gold deposit, a large scale type deposit found recently, is a transitional type deposit between Jiaojia gold deposit and Linglong gold deposit. Thermoelectricity of pyrite in 22 samples including three types of ores and different levels are studied in this paper. It is showed that the type of electric conduct was mainly N type. Pyroelectricity rate of iron-pyrite in beresite which was formed in early period is the maximum, the pyroelectricity rate of iron-pyrite and cooper-pyrite which was formed in major ore -forming period is reduced, and the rate is the minmum in iron-pyrite-cooper-pyrite quartz vein formed in late period. Accompanying with the phenomena that the occurrence rate of N type pyrite and the pyroelectricity coefficient decreased gradually from 130m to 242m above sea level. It is regarded that orebodies on the superficial part had been eroded. The continuity of the occurrence rate of N type pyrite indicated that there is a large resource potentiality in its deep part.