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根据流体包裹体特征、同位素组成等,认为官田黄铁矿矿床成矿压力小于100bar,成矿热流体温度低于220~240℃,盐度低于12%(wt),pH为4.4~5.8,Eh为-0.5,fO2值小于10-25bar,因此其成因类型为浅成低温水热脉状黄铁矿矿床。交代充填作用形成黄铁矿,不同性质的溶液在运移途中相遇,造成其它成矿元素的淀积,大气降水具双重成矿作用。
Based on the characteristics of fluid inclusions and isotopic composition, it is considered that the mineralization pressure of the Gutian pyrite deposit is less than 100 bar, the temperature of the mineralization fluid is less than 220-240 ℃, the salinity is less than 12% (wt), and the pH is 4.4 ~ 5.8, Eh is -0.5 and fO2 value is less than 10-25bar, so its genetic type is epithermal pyrolytic pyrite deposit. The formation of filling pyrite account for the formation of pyrite. Solutions of different nature meet on the way of migration, resulting in the deposition of other ore-forming elements and dual precipitation of atmospheric precipitation.