Abstract
A comparative description of two sulfide copper-nickel deposits confined to the middle massifs is given: Aguablanca (Iberian Massif, Spain) and Shanuch (Kamchatka Massif, Russia). It was shown that both deposits are spatially and genetically related to small intrusions and dikes of mostly basic composition. Ore bodies are funnel-shaped, lenticular, stock-shaped, and vein-like, and are spread to significant depths. Both deposits contain rich sulfide copper-nickel ores as well as relatively poor; the ore texture is predominantly breccia or massive, seldom disseminated. Ore mineral composition includes pyrrhotite, pentlandite, and chalcopyrite with an insignificant admixture of minerals of the platinum group elements and gold. The ore bodies were topped with an "iron hat", which was the main sign of copper-nickel mineralization at depth.
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