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银厂坡银矿床碳酸盐化蚀变作用与银的矿化富集在空间上紧密相伴,这种蚀变作用导致矿石与围岩中组分有明显差异。本文通过定量计算阐明组分之间的迁移方向;计算表明在银的原生富集过程中,常量组分的带入与带出最不明显;而微量组分Ag和Cu、Pb、Zn、As、Sb、Cd、Ga、Ge带入围岩明显。在银的次生富集过程表现为Ag和Cu、Pb、Cd、Ga、Ge、REE、Al-2O-3、Fe-2O-3、FeO、MnO、K-2O、P-2O-5的强烈带入,以Al-2O-3、Fe-2O-3、K-2O、P-2O-5带入强度最大,这是由于CaO、MgO被淋滤,体积亏损造成强烈带入的假象,而As、Sb、Zn、V、Cr、Co、Ni、CaO、MgO为自围岩中带出组分,以CaO、MgO带出强度最大。REE除原生富集的弱蚀变白云岩→矿化白云岩表现为带出外,其余原生富集过程均表现为带入围岩。造成组分发生迁移的主要因素除各组分自身的地球化学性质的差异外,水岩反应的物化条件也是造成银的不同富集阶段中不同组分发生不同程度迁移的一个重要因素。
The carbonate alteration in Yinchangpo silver deposit is closely related to the mineralization and enrichment of Ag in space, and this alteration results in significant differences in the composition of ore and surrounding rock. In this paper, the migration direction of the components is elucidated through quantitative calculation. The results show that the components of Ag and Cu are the least obvious in the primary enrichment of silver, while the trace components Ag and Cu, Pb, Zn and As , Sb, Cd, Ga, Ge into the surrounding rock significantly. The secondary enrichment process in Ag is characterized by Ag and Cu, Pb, Cd, Ga, Ge, REE, Al-2O-3, Fe-2O-3, FeO, MnO, K-2O and P-2O-5 Intense introduction, to Al-2O-3, Fe-2O-3, K-2O, P-2O-5 into the maximum intensity, which is due to leaching CaO, MgO, However, As, Sb, Zn, V, Cr, Co, Ni, CaO, MgO are the components that are brought out from the surrounding rock, and CaO and MgO are the most abundant. In addition to the REE, weakly altered dolomite → mineralized dolomite, which were originally enriched, showed up and out, the rest of the primary enrichment process was carried into the surrounding rock. In addition to the differences in the geochemical properties of the components themselves, the physicochemical conditions of the water-rock reaction are also an important factor for the migration of different components in different enrichment stages of silver.