Platinoid element contents were determined in 16 samples of Fe-Mn crusts and nodules collected during dredging deep-sea mound slopes of the Pacific Ocean from the equator to 27°N. The method of neutron activation analysis with pre-concentration of the platinoids was used for these determinations. There is no relationship between platinoid contents in deep-sea (>3000 m) Fe-Mn nodules with depth of sampling, as well as with age of nodule layers. It is concludet that ultramafic rocks are the primary source of platinoids in Fe-Mn nodules.

Supplement to: Bekhtold, A F (1992): Platinoids in Fe-Mn crusts and nodules from some areas of the Pacific Ocean. Tikhookeanskaya Geologiya (Pacific Geology), 11(4), 10-24