Types and Distinctive Features of Ore-Bearing Formations of Copper-Nickel Deposits

  • M. N. Godlevsky
  • A. P. Likhachev
Conference paper
Part of the Special Publication No. 4 of the Society for Geology Applied to Mineral Deposits book series (MINERAL DEPOS., volume 4)

Abstract

Ore-bearing formations and copper-nickel deposits are recognized as follows: (1) Duluth-type gabbro-troctolite formation; (2) Norilsk-type gabbro-dolerite formation; (3) Bushveld and Monchegorsk-type gabbro-norite-pyroxenite-peri- dotite formation; (4) Pechenga-type gabbro-pyroxenite-peridotite formation; (5) Kambalda- and Aliarechensk-type pyroxenite-peridotite formation; (6) Mount- keith-type peridotite-dunite; and (7) regenerated Subdury-type diorite-norite formation. Nickel-bearing structures are noted in the greater thicknesses of the Earth’s crust and in downwarped Moho boundaries in weakly eroded provinces. There is a clear relationship between magmatic thicknesses of continental depressions and their ore potential: the thickness of volcanogenic units in ore-bearing structures is over 3 km, whereas that of barren structures is less than 2–3 km. In undislocated areas, the relation between the morphology of intrusive bodies and their ore potential is observed. Ore-bearing magmatic bodies are typically elongated, band-chonolitelike bodies with flat roofs and downwarped bottoms; this is attributed to the excess of density of ore-bearing magmas over that of environment (at the expense of sulfide load) and gravity field effect during intrusion of the bodies that brought about one-way movement of magmatic masses.

Keywords

Nickel Crystallization Sulfide Depression Silicate 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1986

Authors and Affiliations

  • M. N. Godlevsky
  • A. P. Likhachev
    • 1
  1. 1.Central Research Institute of Geological Exploration for Base and Precious MetalsMoscowUSSR

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