| 金川铜镍硫化矿床成矿温度压力计算及成矿机制探讨 |
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| 引用本文： | 吴志勇,郭原生,孙淑荣.金川铜镍硫化矿床成矿温度压力计算及成矿机制探讨[J].矿物岩石,1992(1). |
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| 作者姓名： | 吴志勇 郭原生 孙淑荣 |
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| 作者单位： | 中国科学院兰州地质研究所，兰州大学，兰州大学 兰州 730000，兰州 730000，兰州 730000 |
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| 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。
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| 关 键 词： | 金川岩体 橄榄石地质温度计 不可逆过程热力学 深部熔集 |
TEMPERATURE-PRESSURE CALCULATION OF JINCHUAN COPPER AND NICKEL SULFIDE DEPOSIT AND DISCUSSION FOR MINEROGENETIC MECHANISM |
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| Wu Zhiyong.TEMPERATURE-PRESSURE CALCULATION OF JINCHUAN COPPER AND NICKEL SULFIDE DEPOSIT AND DISCUSSION FOR MINEROGENETIC MECHANISM[J].Journal of Mineralogy and Petrology,1992(1). |
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| Authors: | Wu Zhiyong |
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| 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 Ni~(2+),S~(2-)] and silicate magma SiO_4~(4-)] has been discussed in detail. |
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| Keywords: | Jinchuan Intrusion olivine geothermometer irreversible process thermodynamics hypogeal magmatic unmixing-accumulation |
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