The Study Of Genetic Mineralogy In Qianhe Gold Deposits Of Songxian, Henan

The Qianhe gold deposits lied in Songxian, Henan Province, located Xiong'erShan area, by the south edge of North China Craton holding abundant gold and other metal deposits. The strata are composed of Archeozoic Taihua group, middle-proterozoic Xiong'er group and Cenozoic group. The Proterozoic volcanic and Yanshan granites are well developed in Xiong'erShan area; and nearly E-W and NNE trending regional fractures greatly dominated the gold deposits.As a character of mineralogy, the thermoluminescence of quartz is a important part in the study of gold mine. In this task, the thermoluminescence of quartzs had been tested in both the deposite and the wall rock, the deposi belong to the fracture-altered rock type. And we looked for the interspace connection by the thermoluminescence of quartzs and the distributing of deposits by the plumb projection maps made of these data, and made a study in the mechanism of thermoluminescence.The quartzs samples was collected from the zone-4 of Qianhe deposite in the fracture-altered rock. We made mineralogy maps based on the different types of the thermoluminescence, contrasted them with the isoline maps of gold grade. We also analysed the microelement and the the composition of fluid inclusions of quartzs. Conclusion: (1)The high apices areas of the thermoluminescence and the main deposites have the same current in direction. The high apices lines at the 20080 and 20084 areas have a direction to deep side. Made the reappearance of the high apices areas in deep feasible. (2)The apices of the thermoluminescence of quartzs have a positive correlativity with the content of microelement of quartz. The cavity center Al3+-O- of quartz lie on the apices of thermoluminescence from 280℃to 320℃,the electron center Ti³⁺-M⁺ lie on the apices of thermoluminescence from 240℃to 245℃.These are the characters of the quartzs of Qianhe deposites. (3)The liquid compositions of fluid inclusions of quartzs are Cl^-,SO₄^2-,Na⁺,Ca²⁺,and less F^-,K⁺,Mg²⁺; the gas compositions of fluid inclusions of quartzs are CH4,H2O,C2H6,H₂S,CO₂,and less N₂ and Ar. It belongs to NaCl-H₂O system, the main source of the mineralization fluid come from the atmosphere water. The consistency of inclusion of quartzs have a positive correlativity with the apices of the thermoluminescence of quartzs. (4)The thermoluminescence of carbonates have the same result with the thermoluminescence of quartzs in forecast of the places of deposites in deep side.To sum up, we have had a abecedarian study on the mineralogical characters of quartz of Qianhe gold deposites by the analyses of the thermoluminescence of quartzs, the microelement of quartzs, the composition of fluid inclusions of quartzs, and the thermoluminescence of carbonate. We also made some usefull conclusions at last.