 | | Journal (volume) | | of solid, primarylooking secondary sulphides (violarite-siegenite, marcasite and pyrite). The thickness...1980); the acid and basic lavas of the Kuopio district (2060 Ma U-Pb zircon, by Olavi Kouvo; Heikki Lukkarinen...and sulphides (pyrrhotite, pentlandite, pyrite, violarite, millerite, marcasite, bornite and chalcocite)...pyrrhotite, pentlandite, covellite, millerite, violarite, galena and marcasite). In some strongly carbonatized...completely altered to marcasite and pentlandite to violarite at 68.33 m (DDH depth). The surface oxidation |  | | Book | | and Ni is principally bonded in pentlandite, violarite, and millerite. The rock might be considered as...from the rock include Co (from pentlandite and violarite) and Cr and Fe (from magnetite). However, traditional...Pyrite Chalcopyrite Sphalerite Galena Millerite Violarite Gersdorffite Chemical composition Fe2O3 FeTiO3...being a product of pentlandite decomposition. Violarite has been observed in close association with pentlandite...between Fe4.37Ni4.25Co0.29S8 and Fe3.52Ni5.47S8. Violarite shows compositions varying between Fe0.96Ni1.48Co0 |  | | Journal (article/letter/editorial) | | Vauquelinite Vermiculite Vesuvianite Villiaumite Violarite Vivianite Volchonskoite Voltaite Wadeite Wickmanite...and alluvial–fluvial placer deposits (Hokkaido, Japan, Great Dyke, Zimbabwe, Ural Mountains, Russia)....sediments but rarely in volcanic rocks e.g., Cobalt district of Ontario, Canada, Wittichen, Richelsdorf, Bieber...Jachymov, Czech Republic, Black Hawk District, USA, Batopilas District, Mexico (Fig. 04.01). These vein-type...gemological products (Fig. 04.10). In the Marlborough district of Queensland, Australia, it occurs within the | | | Journal (article/letter/editorial) | | Vauquelinite Vermiculite Vesuvianite Villiaumite Violarite Vivianite Volchonskoite Voltaite Wadeite Wickmanite...and alluvial–fluvial placer deposits (Hokkaido, Japan, Great Dyke, Zimbabwe, Ural Mountains, Russia)....sediments but rarely in volcanic rocks e.g., Cobalt district of Ontario, Canada, Wittichen, Richelsdorf, Bieber...Jachymov, Czech Republic, Black Hawk District, USA, Batopilas District, Mexico (Fig. 04.01). These vein-type...gemological products (Fig. 04.10). In the Marlborough district of Queensland, Australia, it occurs within the |
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