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Title: Geochemistry of Ferromanganese Nodules from Different Areas in North Equatorial Pacific
Authors: Rajamanickam, G V
Roonwal, G S
Friedrich, G H
Issue Date: Mar-1986
Publisher: NISCAIR-CSIR, India
Abstract: Among the analysed manganese nodules from VA-05/1, VA-08/1 and VA-13/2 areas, interelemental relationships, regardless of topography and morphology indicate a close alfmity among Mn, Ni, Cu, Cd and Zn distribution. Unlike the earlier reports, Co behaves sympathetically with both Mn and Fe. P follows Al rather than Ca. Ca stands independently. Hg does not show any association with the analysed elements whereas Cd is harmonic with Mn, As with Fe and Zn. VA-13/2 area samples show large variation in the metal values. Wider difference in Mn/Fe ratio of nodules from VA-13/2 area, compared to the nodules from other areas in the region is attributed to the observed topographic variability and the differences in the morphology of the nodules. The distinct contrasting relationship of Mn and its associates with Ca, Al and P suggest the clear divergence in the mode of incorporation as authigenic and lithogenic components. Higher concentrations of Hg, As and Cd and their relationships with other elements suggest the probability of their supply from many sources. The overall geochemical behaviour of these nodules suggests the domination of hydrogenous origin over the early diagenetic process.
Page(s): 13-19
ISSN: 0975-1033 (Online); 0379-5136 (Print)
Appears in Collections:IJMS Vol.15(1) [March 1986]

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