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东五家子金矿矿脉围岩主要是太古宙建平群变质中基性火山岩。矿脉、围岩、脉岩及区域岩浆岩都具有负Eu异常(δEu为0.2~0.4),LREE/HREE为3.4~11.6,(La/Yb)N为6.2~40.7,轻重稀土分馏程度较高,配分曲线有右倾趋势,说明在物质来源方面可能有一定的联系。矿石中黄铁矿和方铅矿δ34S的变化范围为1.91×10-3~3.14×10-3,具有幔源硫的特征。氢、氧同位素组成的投影点介于岩浆水和大气降水之间,成矿流体以岩浆水为主,后期混入大气降水,成矿温度为144.6℃~183℃,成矿压力为(41.8~46.0)×106Pa,矿化深度为5.12~5.39 km,属造山型金矿中的中浅成金矿床。
Dongwujiazi gold deposit vein rock is mainly Archean Jianping group metamorphic basement volcanic rocks. The veins, surrounding rocks, vein rocks and regional magmatic rocks all have negative Eu anomalies (δEu 0.2 ~ 0.4), LREE / HREE 3.4 ~ 11.6, (La / Yb) N 6.2 ~ 40.7, The distribution curve has a rightward tendency, indicating that there may be some connection in the source of the material. Δ34S ranged from 1.91 × 10-3 to 3.14 × 10-3 for pyrite and galena in the ore, which has the characteristics of mantle-derived sulfur. The projection points of hydrogen and oxygen isotopes lie between magmatic water and atmospheric precipitation. The ore-forming fluids are mainly magmatic water and are mixed with atmospheric precipitation at the later stage. The mineralization temperature is 144.6 ℃ ~ 183 ℃ and the mineralization pressure is 41.8 ~ 46.0 ) × 106Pa, and the mineralization depth is 5.12 ~ 5.39 km, which belongs to the moderate-shallow gold deposit in the orogenic gold deposit.