黑龙江省老柞山金矿床毒砂热电性研究

STUDIES ON THERMOELECTRIC QUALITIES OF ARSENOPYRITES IN LAOZUOSHAN GOLD-DEPOSIT, HEILONGJIANG PROVINCE

毒砂是老柞山金矿主要载金矿物。早期与晚期成矿作用形成的毒砂 ,其热电性具明显差异 :早期毒砂热电系数为正值 ,平均 2 5 0 .3μV /℃ ,P型导电 ;晚期毒砂热电系数为负值 ,平均- 2 16 .9μV /℃ ,为N型导电。通过对不同成矿期以及同一样品中不同导型毒砂的热电性特征与成分关系的研究得出 :毒砂的热电性特征由As、S相对含量决定 ,若为富As型毒砂 ,则为P型导电 ,若为富S型毒砂 ,则为N型导电。

Arsenopyrite is the main mineral carrying Au in Laozuoshan gold-deposit. Thermoelectricity is evidently various for different staged arsenopyrites. The Thermoelectric coefficients of arsenopyrites formed in early ore-forming stage are positive , average value is 250.3μV/℃, P type conductivity. The thermoelectric coefficients of later staged arsenopyrites are negative, average value is -216.9μV/℃, N type conductivity. Researches on relationship between thermoelectricity and chemical compositions of arsenopyrites which formed in different deposits, or in one deposit while formed in different ore-forming stage show that the type of thermoelectricity of arsenopyrite is dominated by the relative contents of As and S in it. As-rich arsenopyrites correspond to P type conductivity, whereas to N type.