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(Ni^(2+),S^(2-))和硅酸盐熔浆(Si_4^(4-))产生熔集的机制。
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 [Ni^(2+),S^(2-)] and silicate magma [SiO_4^(4-)] has been discussed in detail.
出处
《矿物岩石》
CAS
CSCD
1992年第1期89-95,共7页
Mineralogy and Petrology
关键词
铜
镍
硫化物
矿床
成矿
Jinchuan Intrusion
olivine geothermometer
irreversible process thermodynamics
hypogeal magmatic unmixing-accumulation
