Interelement relationship in abyssal Pacific ferromanganese nodules and associated pelagic sediments

Physics

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Scientific paper

By R-mode factor analysis and enrichment factor calculations, most of the elements in abyssal ferromanganese nodules and associated pelagic sediments (excluding common authigenic minerals like apatite, barite, opal and carbonates) are found to be preferentially concentrated in one of the following three major phases: aluminosilicates ( e.g. , Al, Si, Sc, Ga, Cr, Be, Na, K, Rb and Cs), Fe-oxides ( e.g. , Fe, P, S, V, Se, Te, As, B, Sn, U, Hg, Pb, Ti, Ge, Y, Zr, Nb, Pd, In, rare-earths, Hf, Th, Pa, Pu, Am, Ru and Bi), and Mn-oxides ( e.g. , Mn, Tl, Ag, Cd, Mg, Ca, Ba, Ra, Co, Ni, Cu, Zn, Mo, Sb and probably W). The specific association of elements with these three phases can be explained by the difference in chemical forms of elements in seawater and by fundamental differences in physicochemical properties ( e.g. , the pH of zero point of charge and dieletric constant) of these three phases.

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