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沃溪金-锑-钨矿床的稀土元素地球化学组成良好地反映了成矿作用的条件和过程,并为示踪矿床成因提供了有用的信息。以流体包裹体为代表的成矿溶液,以较高的稀土总量、显著的轻稀土富集和缺乏明显的铕异常为特征,代表了一种通过在碎屑沉积物柱中循环而萃取矿质的演化的海水热液。矿石相对于成矿流体(母液)富集重稀土而轻微亏损铕,反映了矿石沉淀过程中来自于海水的稀土元素掺合。同一矿层内由下往上,重稀土相对富集的程度逐渐增大而稀土总量则逐渐降低,表明随着热液化学沉淀作用的进行,海水掺合的影响逐渐增强。矿石的稀土元素组成,无论在分布模式还是在轻重稀土之间的分馏程度上,均与其他许多Sedex型多金属矿床十分相似,暗示了这些矿床具有相似的成因机制。稀土元素地球化学特征支持矿床同生沉积成因的观点。
The REE geochemical composition of the Woxi gold-antimony-tungsten deposit well reflects the conditions and processes of metallogenesis and provides useful information for tracing the genesis of the deposit. Mineralizing solutions, typified by fluid inclusions, characterized by higher total rare earths, significant enrichment of light rare earths and the absence of significant europium anomalies, represent a solution that is extracted by recycling in a clastic sediment column The evolution of seawater hydrothermal. The ore is slightly depleted of europium due to enrichment of heavy rare earths relative to the ore-forming fluid (mother liquor), reflecting the incorporation of rare earth elements from the seawater during ore precipitation. From the bottom to the top of the same deposit, the relative enrichment of heavy rare earths gradually increased and the total amount of rare earths gradually decreased, indicating that the influence of seawater blending gradually increased with the hydrothermal chemical precipitation. The REE composition of the ore is similar to many other Sedex polymetallic deposits both in the distribution pattern and in the fractional fractionation between light and heavy rare earths, suggesting that these deposits have similar genetic mechanisms. Rare Earth Element Geochemical Characteristics Supporting Deposit Genesis Perspective.