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矿床地质  2001 

块状硫化物矿石中硫化物的压溶和增生及成矿意义——以加拿大西部矿床为例

Keywords: 黄铁矿,压溶,增生,再活化,块状硫化物,层控矿床

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Abstract:

加拿大西部块状硫化物矿石普遍地发生过硫化物的压溶和增生。增生作用根据增生体的成分可以分为同质增生和异质增生,根据动力环境可以分为静态增生和动态增生。三品嵌接结构可以是静态增生的产物。压溶和增生是块状硫化物矿床成岩和变质过程中的重要作用。脉石矿物的压溶可使原生矿石就地加富,硫化物的压溶可使成矿物质发生再活化。增生可促进矿质沉淀。富含硫化物的地层之所以能成为地球化学障而有利于后期热液叠加和层控矿床的形成,硫化物品芽的增生是一种重要机制

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