河北省灵寿县西石门金矿黄铁矿热电性标型及其找矿意义  

Thermoelectric Coefficient of Pyrite from the Xishimen Gold Deposit in Lingshou County, Hebei Province and Its Prospecting Significance

作　　者：李青[1] 李胜荣[1] 张秀宝[1] 张林杰[1] 赵毅[1] 赵夫旺[2] 刘洋[2] 

机构地区：[1]地质过程与矿产资源国家重点实验室,中国地质大学(北京)地球科学与资源学院,北京100083 [2]石家庄综合地质大队,石家庄050081

出　　处：《地质学报》2013年第4期542-553,共12页Acta Geologica Sinica

基　　金：国家自然科学基金重大研究计划重点支持项目(编号90914002);全国危机矿山接替资源找矿项目(编号20089937);高等学校学科创新引智计划项目(编号B07011);中国地质调查局计划项目(编号1212011220926)共同资助的成果

摘　　要：河北省灵寿县西石门石英脉型金矿位于华北地台太行隆起区之南东部的阜平矿集区,与该区石湖大型金矿受不同断裂控制。黄铁矿是矿床的主要载金矿物,以4个世代产出于黄铁矿-石英阶段(Ⅰ)、石英-黄铁矿阶段(Ⅱ)、多金属硫化物阶段(Ⅲ)和石英-碳酸盐阶段(Ⅳ)等4个成矿阶段,其中,石英-碳酸盐阶段的黄铁矿十分稀少。本矿段黄铁矿单晶热电系数变化范围为-328～341μV/℃,从早期到晚期,4个世代的黄铁矿热电系数离散性先增大再减小,石英黄铁矿阶段(Ⅱ)离散性最大。从黄铁矿-石英阶段(Ⅰ)至石英-碳酸盐阶段(Ⅳ),黄铁矿热电导型的变化规律是P<N(Ⅰ)→P≈N(Ⅱ)→P>>N(Ⅲ)→P>>N(Ⅳ);P型黄铁矿热电系数均值αP和出现率P%由浅部到深部,总体为逐渐降低,局部呈波状起伏,与矿石金品位呈正相关关系。黄铁矿的热电系数温标计算和投图表明,该矿床的成矿温度集中在168～330℃,为中低温矿床。热电系数在50～200μV/℃之间的黄铁矿是富金矿段的标志。综合分析认为,该矿床290m以下仍有良好的找矿潜力。Xishimen quartz vein type gold deposit in Lingshou County of Hebei Province is tectonically located in the Fuping ore-cluster region, Taihang uplift in the central North China platform. It is structurally controlled by different fault system compared with the Shihu large gold deposit in the same region. Pyrite is the main gold-bearing mineral, occurring in four generations including the pyrite-quartz stage (Ⅰ), Quartz-pyrite stage (Ⅱ), polymetallic sulphide stage (Ⅲ) and quartz-carbonate stage (Ⅳ). Pyrite is sparse in stage Ⅳ. The thermoelectric coefficient of the pyrite in this deposit changes in the range between -328 and 341μV/℃. The discreteness of pyrite thermoelectric coefficients firstly increase and then decrease from the early to late stages, and it's the greatest in stage Ⅱ. The thermoelectric conduction type of pyrite is characterized by P<N in the Ⅰ stage, P≈N in the Ⅱ stage, P>>N in the Ⅲ stage, and P>>N in the Ⅳ stage. With some small fluctuations, the percent of P-type of pyrite (P%), and mean value of the thermoelectric coefficients for the P-type of pyrite (P) gradually decrease from the shallow part to the depth, and there exists a positive correlation between the P%, P values and the gold grade. A calculation with empirical formula implies that the ore deposit is a low-medium temperature gold deposit, whose pyrite crystallization temperature is in the range of 168~330℃。The thermoelectric coefficient of the pyrite in the rich ore segment is confined within the range of 50~200μV/℃. Furthermore, the authors suggest that good exploring prospect for gold in this deposit would be expectable below 290m level.

关 键 词：金矿 黄铁矿 热电性 矿物学填图 河北灵寿 华北克拉通 

分 类 号：P618.51[天文地球—矿床学]