Correlations between trace elements in pyrite and gold mineralization of gold deposits on the North China platform  

作　　者：Jianzhao Yin Ying Sun Haoyu Yin Hongyun Shi James Sparling Yuhong Chao Shoupu Xiang 

机构地区：[1]College of Earth Sciences,Jilin University,Changchun 130061,China [2]Wuhan Institute of Technology,Wuhan 430074,China [3]College of Geoexploration Science and Technology,Jilin University,Changchun 130062,China [4]Guinea Westfield Mining Company-Sarlu,Jinzhong 031300,China [5]Orient Resources Ltd.,Richmond,BC V7A 4V5,Canada [6]Hochschild Mining Canada Corp.,Suite 1700 Park Place,666 Burrard Street,Vancouver,BC V6C 2X8,Canada [7]Ganzhongnan Institute of Geology and Mineral Exploration,658 Jiefangxilu Road,Nanchang 330002,China [8]Silvercorp Metals Inc.,Suite 601-Building 1,China View Mansion,#A2 East GongTi Road,Chaoyang District,Beijing 100027,China

出　　处：《Acta Geochimica》2023年第6期1079-1103,共25页地球化学学报（英文）

基　　金：Support for this study was received from the China National Ph.D.Foundations。

摘　　要：By studying both the microscopic physical and chemical typomorphic characteristics of typical mineral pyrite samples associated with representative gold deposits on the north-central margin of the North China Platform,this paper seeks to identify macroscopic metallogenic mechanisms of gold deposits and to reveal the formation mechanism of lattice gold in pyrite.Typomorphic characteristics of pyrite reveal that pyrite grain size has a negative correlation with gold content.Cubic pyrite,as the dominant crystal form,contains more gold than pentagonal dodecahedral pyrite.Both pyrite crystal forms and chemical compositions indicate that the replacement style of gold deposit formed in a low saturability,low sulfur fugacity,and at temperatures either much higher or much lower than its best forming temperature;comparatively,that of the quartz vein style of gold deposit occurred under conditions with the best temperature,rich in sulfur,and with high sulfur fugacity.The Au/Ag ratios of the pyrites show that both the replacement and quartz vein styles of deposits are mesothermal and hypothermal,while the Co/Ni ratios of the pyrites indicate that the quartz vein style is of magmatic-hydrothermal origin.The X-ray diffraction intensity of pyrite rich in gold is lower than that of pyrite poor in gold at the quartz vein style.In general,with an increase in gold content in pyrite,the total sum intensityΣI decreases.The pyroelectricity coefficient has a negative correlation trend with the values of(Co+Ni+Se+Te)-As and(Co+Ni+Se+Te)/As.The pyrite pyroelectricity of the replacement style is N-type,indicating that it formed under low sulfur fugacity,while that of the quartz vein style is a mixture of P-N types,indicating that it formed under high sulfur fugacity.On the pyroelectricity-temperature diagram,pyrite of the replacement style is mainly distributed between 200 and 270°C,while that of the quartz vein style varies between 90–118 and274–386°C,demonstrating a multistage forming process.In contrast to previous researchers'c

关 键 词：Unit cell parameter PYROELECTRICITY Electron paramagnetic resonance Infrared spectrum PYRITE Gold deposit 

分 类 号：P618.51[天文地球—矿床学]