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dc.contributor.authorJauhari, P.
dc.identifier.citationMarine Geology, vol.86; 1989; 237-242
dc.description.abstractThe trace element variations in manganese nodules from the Central Indian Basin have been related to the underlying sediment type. Percentages of Mn, Cu and Ni are high in nodules occurring in siliceous sediments compared with nodules from the red clays which contain higher Fe and Co. Clustering of analysed shows that Ni and Cu are geochemically associated with Mn, and Co with in both sediment types. However, the degree of correlation between all the elements is higher in the nodules from red clay sediments compared to the siliceous ooze-area nodules. Similarly, there is an increase in the Ni and Cu values and a decrease in Co content with increasing Mn/Fe ratio but the scatter plot of the elements from the red clay sediments show more linearity than the siliceous sediments where the plots are more scattered. The variations in the Mn/Fe ratio reflect variability in the composition of bottom water which in turn influences the type of underlying sediments and supply of metal to the deposits. The higher concentrations of Mn, Ni and Cu in the nodules from siliceous sediments reflect the influence of early diagenesis of the biogenic components, whereas the higher Fe and Co contents in the nodules occurring in red clay areas are a result of their precipitation as authigenic oxyhydroxides
dc.relation.ispartofMar Geol
dc.subjectGeology and Geophysics
dc.subject.otherferromanganese nodules
dc.subject.otherISW, Central Indian Ocean
dc.titleVariability of Mn, Fe, Ni, Cu and Co in manganese nodules from the Central Indian Ocean Basin
dc.typeJournal Article

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