Metal flux as an alternative parameter in evaluating the resource potential for co-rich ferromanganese crusts
Metal flux as an alternative parameter in evaluating the resource potential for co-rich ferromanganese crusts
复制标题
金属通量作为评估富钴铁锰结壳资源潜力的替代参数
DOI：
10.1080/1064119x.2017.1378781
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发表时间：
2018
影响因子：
2.2
通讯作者：
Usui Akira
中科院分区：
文献类型：
--
作者：
Sato Hisaaki;Usui Akira
我们提出了一个地球化学参数，“金属通量”在评价水成富钴铁锰结壳矿床在太平洋海山区，这是基于物理，化学和地质特征的综合生长桩的结壳。我们计算了15个站点的金属通量从不同的深度范围从900- 6000米从不同的海山。金属通量的长期和区域变化表明了强烈的地质控制，也可以作为估计结壳经济潜力的可靠工具。Co通量随水深增加而减小，Ni和Mn通量几乎不变。Al和Fe通量随地区而变化，表明岛弧附近西部地区的较高值可能与亚洲大陆的供应有关。结果表明，氧化还原敏感性金属元素Co受海水氧化还原条件控制，Fe和Al受陆源输入控制。金属通量反映了全球和区域的状况，并控制了金属的成分多样性，因此，该参数可以成为估计或挑选更多潜在区域的可靠有力工具。
We propose a geochemical parameter, “metal flux” in evaluating hydrogenetic Co-rich ferromanganese crust deposits in the Pacific seamount area, that is based on physical, chemical, and geological characterization of the integrated growth piles of crusts. We calculated the metal flux for fifteen sites from different depths ranging between 900-6000m from different seamounts. The secular and areal variations of metal flux indicate a strong geological controls, and also can be a reliable tool for estimating an economic potential of the crusts. The Co flux decreases with increasing water depth, followed by almost constant flux of Ni and Mn. The Al and Fe fluxes vary with regions, indicating higher values in the western regions near the island arc probably related to a supply from the Asian continents. The results imply that Co, a redox sensitive metal element, is controlled by redox conditions of seawater, while Fe and Al are by terrigenous input. The metal flux reflects global and regional conditions and controls the compositional diversity of metals, thus consequently, the parameter can be a reliable powerful tool to estimate or single out more potential areas.