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关于海洋铁锰物质内贵金属的丰度、分布和成因知道得很少,但是,例如银和金元素与地壳平均丰度比较,常富集于铁锰结核内早已为人们所熟知。与地壳丰度相比,银在结核内的富集系数界于50—100之间,并发现金的富集系数为100—1000;我们了解在Fe-Mn壳内尚无银和金此种相似的数据,尽管Halbach等人对太平洋中心区地壳内铂的富集作过描述。其他区域贵金属的重要富集,可能达到经济价值的是在如东太平洋海隆和红海与活动扩张中心伴生的块状硫化物矿床中。文中所述位于西南太平洋弧后铁锰壳内银和金的异常的产出类型,据我们所知是第一次报道。
Little is known about the abundance, distribution and genesis of precious metals in marine iron-manganese materials, but, for example, the abundance of silver and gold, as compared with the average crustal abundance, is often well-known within iron-manganese nodules. Compared with the abundance of crust, the enrichment coefficient of silver in the tuberculosis is between 50-100, and the enrichment coefficient of gold is found to be 100-1000. We know that there is no silver or gold similar in the Fe-Mn shell Although Halbach et al. Described the platinum accumulation in the crust in the central Pacific Ocean. The significant enrichment of precious metals in other areas may be of economic value in massive sulphide deposits associated with centers of activity expansion such as the Seawall and the Red Sea in the eastern Pacific. The type of anomalous output of silver and gold located in the southwestern Pacific arc-back ferromanganese as described in the paper is the first report to our knowledge.