【摘要】 本文利用橄榄石温度计、压力计的方法,计算金川超基性岩体主要含矿岩相成岩的温度压力条件。根据计算所得的温压数据、矿石结构特征、含矿岩相的相互接触关系及储量分布,判断矿床成因主要属于深部熔集型,并根据不可逆过程热力学平衡扩散方程,探讨硫化物(Ni²⁺,S^2-)和硅酸盐熔浆(Si₄^4-)产生熔集的机制。更多还原

【Abstract】 By means of olivine thermometer and piezometer measurement, the lithogeneous temperature-pressure condition for major sulfide-bearing lithofacies of Jinchuan intrusion has been calculated. On the basis of obtained temperature-pressure data,texture of ore,contacting relationship of various sulfide-bearing lithofacies and the reserved distribution, it has been suggested that the deposit has an origination of hypogeal magmatic unmixing-accumulation. Furtherly with the employment of balanced diffusion equation from irreversible process thermodynamics, the mechanism of magmatic unmixing-accumulation between sulfide [Ni²⁺,S^2-] and silicate magma [SiO₄^4-] has been discussed in detail.更多还原