Occurrence and Character of Manganese Nodules in DOMES Sites A, B, and C, East Equatorial Pacific Ocean
Occurrence and Character of Manganese Nodules in DOMES Sites A, B, and C, East Equatorial Pacific Ocean
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东赤道太平洋DOMES A、B、C位点锰结核的赋存及特征
DOI：
10.1007/978-1-4684-3518-4_14
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发表时间：
1979
期刊：
影响因子：
--
通讯作者：
W. McFarland
中科院分区：
文献类型：
--
作者：
R. K. Sorem;W. Reinhart;R. H. Fewkes;W. McFarland
对在DOMES A、B和C站点的箱式岩心中收集的锰结核的产状和物理化学特性进行的研究表明，几乎所有结核都位于沉积物-水界面。埋藏结节很少见。与站点B和C相比，站点A的结节似乎较小，表面较光滑。C站点的结核大部分大小为2至6厘米，顶部光滑，底部颗粒状，所有站点的结核在单个箱式岩芯中的Mn、Fe、Ni和Cu含量不均匀。最大的变化出现在A和C站点的盒式岩心中。Mn、Ni和Cu通常是协变的，而Fe含量与Mn含量相反，金属含量的大变化通常是由于氧化物矿物学的差异，但一些变化与粘土含量有关。大型结核的锰、镍和铜含量往往相对较低，B站点结核的锰、镍和铜平均值最高，铁平均含量最低。C点结核和A点结核具有相同的Mn含量，但C点结核比A点结核富Ni贫Fe。
Study of the occurrence and physical and chemical character of manganese nodules collected in box cores in DOMES Sites A, B, and C indicates that virtually all nodules lie at the sediment-water interface. Buried nodules are rare. Nodules seem to be smaller and have smoother surfaces at Site A than at Sites B and C. Site C nodules are predominantly 2 to 6 cm in size and have smooth tops and granular bottoms.Nodules from all sites show non-uniform contents of Mn, Fe, Ni and Cu within individual box cores. The greatest variations were found in box cores from Sites A and C. Mn, Ni, and Cu are generally covariant whereas Fe content is antithetic to Mn content Large variations in metal content are generally due to differences in oxide mineralogy but some variation is related to clay content. Large nodules tend to be relatively low in Mn, Ni, and Cu.Site B nodules have the highest mean values for Mn, Ni, and Cu and the lowest mean Fe content. Site C nodules and Site A nodules have the same Mn content, but Site C nodules are richer in Ni and poorer in Fe than Site A nodules.