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选取大红山铜铁矿床典型穿脉进行构造-岩石地球化学编录、系统取样,并对样品稀土元素进行化验分析。研究表明,1该矿区内各类岩(矿石)从矿化构造岩→矿石→未矿化构造岩的稀土总量呈现出逐渐降低的趋势,反映出成矿流体与不同构造岩的水岩反应程度上的差异;2从(La/Yb)N看,矿区同类断裂构造岩的轻稀土分异程度较大,但不同断裂构造岩间的分异性却较为均一,从该区围岩、矿石、构造断裂岩的LREE/HREE与(La/Yb)N值特征中可以看出,轻重稀土元素间的分异程度具有一定的相似性,反映出成矿流体对地层岩石存在着一定的继承性和阶段演化性特征;3从地层岩石→未矿化断裂构造岩→矿化断裂构造岩→块状、条带状矿石,LREE/HREE(5.66~13.27)有逐渐增大的趋势,反映出在断裂过程中,稀土元素发生了迁移。矿区内各类岩(矿)石的δ(Eu)>1,δ(Ce)呈弱负异常,显示出成矿作用主要是在相对氧化的环境下进行。
The Dahongshan copper-iron deposit is selected to be traversed by tectono-lithogeochemistry and systematic sampling, and the rare earth elements in the sample are analyzed by laboratory analysis. The results show that the total amount of all kinds of rocks (ore) in this mining area tends to decrease gradually from mineralization tectonics → ore → unmineralized tectonic rocks, reflecting the interaction of ore-forming fluids with water-rock reactions of different tectonic rocks (La / Yb) N, the light rare earths of the similar faults in the mining area have a large degree of differentiation, but the differences between the different fault structures are relatively uniform. From the analysis of the surrounding rock, ore, It can be seen from the characteristics of LREE / HREE and (La / Yb) N values of structurally fractured rocks that the degree of differentiation between light and heavy rare earth elements has a certain similarity, reflecting that ore-forming fluids have certain succession to formation rocks and Stage evolutionary characteristics; 3 LREE / HREE (5.66 ~ 13.27) tends to increase gradually from the stratigraphic rocks → unmineralized fault rocks → mineralized fault rock → massive and banded ore, During the process, rare earth elements have migrated. The δ (Eu)> 1 and δ (Ce) of all kinds of rocks and minerals in the mining area show a weak negative anomaly, indicating that the metallogenesis is mainly carried out in a relatively oxidized environment.