Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

V. K. Banakar ¹, D. V. Borole ¹

Affiliations
1 National Institute of Oceanography, Dona Paula, Goa 403004, IN

Abstract

A ferro- manganese nodule collected in EEZ of Seychelles yields a growth rate of 1.5 mm/¹⁰⁶Y by ²³⁰Th (ex) and ²³⁰Th (ex)/²³²Th activity ratio methods indicating very slow growth of ferro-manganese nodules. The Mn/Fe and U/Th ratios suggest that the genesis of the studied nodule is of hydrogenetic origin.

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