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矿产资源

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矿产资源,是指由地质作用形成的,具有利用价值的,有固态液态气态自然资源

分类

成因

矿产的形成作用一般有:

  • 岩浆作用:形成的矿床是元素富集过程的结果;有些矿床是早期晶体分离形成的,有些是由晚期岩浆作用形成的。
  • 变质作用:岩浆岩及其侵入围岩的接触带处经常发现矿床,该区以接触变质作用为特征。
  • 沉积作用:在搬运过程中,风和流水使沉积物按大小、形状、密度分选;比如砂、砾石都是由风和流水搬运、沉积形成的;沉积作用还可形成金、金刚石砂矿等矿物。
  • 风化作用:可使一些物质达到一定浓度,并具有开采价值;比如富铝火成岩风化后的残留土壤中,使难溶的含水氧化铝氧化铁相对富集,形成铝矿。
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矿产资源
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