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黄铁矿是重要载金矿物,其标型特征能够指示诸多成矿信息。针对义兴寨金矿中黄铁矿的化学成分、爆裂温度及S,Pb同位素等特征进行详细的研究,试图提取该矿床的成因及找矿信息。研究表明,黄铁矿化学成分中S/Fe,Au/Ag,Co/Ni,Fe/(S+As),δFe-δS,Co-Ni-As等成因标型显示该矿床属于中偏浅成岩浆热液型矿床,且目前所开采的位置处于矿体中下部位置;爆裂温度显示为中低温型矿床。硫同位素值在-3.2‰～+3.5‰,数值集中,接近陨石硫特点,铅同位素206Pb/204Pb值为16.524～16.628,207Pb/204Pb值为15.284～15.321 2,208Pb/204Pb值为36.686～36.812,显示成矿物质来源于上地幔与下地壳。结合本区的成岩、成矿年龄,显示该金矿床的形成与华北地区燕山期大规模的岩浆活动有密切关系。
Pyrite is an important gold-bearing mineral, and its standard features can indicate many mineralization information. In view of the chemical composition, the temperature of the rupture, and the isotopes of S and Pb in the ore of the Yixingzhai gold deposit, the characteristics of the ore are studied in detail, and the cause of the deposit and ore prospecting information are sought. The results show that the genesis patterns of S / Fe, Au / Ag, Co / Ni, Fe / (S + As), δFe- δS and Co-Ni-As in the chemical composition of pyrite show that the deposit belongs to shallow Magmatic hydrothermal deposits, and the current mining location is located in the lower part of the ore body; burst temperature shows low and medium temperature deposits. The sulfur isotope values ranged from -3.2 ‰ to + 3.5 ‰ and were close to the meteorite sulfur characteristics. The Pb isotopes 206Pb / 204Pb values ranged from 16.524 to 16.628 and 207Pb / 204Pb values ranged from 15.284 to 15.321 2 and the 208Pb / 204Pb values ranged from 36.686 to 36.812, Metallogenic materials come from the upper mantle and the lower crust. Combined with diagenesis and metallogenic age in this area, it shows that the gold deposit is closely related to the large-scale magmatic activity in Yanshanian area of North China.