东太平洋洋脊含金属沉积物中的自然铝在地质环境中，自然金属通常只在老的火山岩和热液矿石中发现．自然金属在远洋沉积物中极少见．这是因为这样的沉淀物通常是在强氧化条件下形成．但是，最近在中一新生代海洋沉积物中发现了自然金属和合金（虽然稀少）．它０］仅产生在... Natural Aluminum in Metallic Sediments of the Eastern Pacific Ridge In geological settings, natural metals are usually found only in older volcanic and hydrothermal ores. Natural metals are rare in ocean sediments. This is because such deposits are usually formed under strong oxidizing conditions. However, natural metals and alloys (albeit rare) have recently been found in the Cenozoic marine sediments. It 0] only produced in ...