铬的迁移形式、成矿机理新探  

Discussion on a new mechanism of Cr transportation

作　　者：郑大中[1] 郑若锋[1] 

机构地区：[1]成都综合岩矿测试中心,成都610081

出　　处：《地质找矿论丛》2012年第1期1-8,共8页Contributions to Geology and Mineral Resources Research

摘　　要：通过对地球深部富氢流体、若干金属氢化物及合金氢化物的形成条件与性质、铬矿物的化学成分及其共生伴生矿物的研讨,结合铬铁矿成矿的地质背景,认为铬氢化物、铬合金氢化物是铬成矿的主要迁移形式。它们从地球深部富氢强还原环境随岩浆迁移至地壳浅部,由于H2,CO,CH4等逃逸、氧化,氧逸度大增,温度、压力下降,铬氢化物和铬合金氢化物分解、氧化、固化富集成铬矿床。Based on study on nature of hydrogen-rich fluid,some metallic hydrides and metallic hydride alloy to depth of the earth and their formation conditions and chemical composition of Cr minerals and the acompanying minerals and Cr ore-forming background we consider that Cr is mainly transported in Cr hydrides and Cr hydride alloy in the metallogenic prosess.The Cr hydrides and Cr hydride alloy migrate together with magma from strong hydrogen-rich environment at depth of the earth to shallow crust and pressure decreases due to escape of H2,CO,CH4 then Cr hydrides and Cr hydride alloy are decomposed,oxidized,solidified and enriched to Cr ore deposit.

关 键 词：铬氢化物 铬合金氢化物 迁移形式 氧化固化富集 铬矿床 

分 类 号：P611.5[天文地球—矿床学] P595[天文地球—地质学]