L.V. Zakharikhina

The article shows that in the regions of sulfide copper-nickel ore occurrences in the Kamchatkan nickeliferous province the secondary overlayed geochemical dispersion haloes of ore elements are mainly formed in ochre illuvial horizons of volcanic soils lying within this territory (western coast of Kamchatka) in low profile parts of volcanic soils. In soils of the zones with gold-silver mineralizations located in the north-eastern and southern parts of Kamchatka («Ozernovsky» deposit and «Porozhistoye» ore occurrence) maximum secondary accumulation of many ore and accompanying elements is also typical for illuvial ochre horizons developed in these regions both in the middle and in the low parts of soils profiles. The most geochemically movable typomorphic elements of gold-silver mineralizations (Ag, Sb, Te and Bi) caused by biogenic accumulation are concentrated in the surface and subsurface organogenic soils horizons.

Keywords: ore elements, dispersion haloes, volcanic soils.