Mineral composition of Fe-poor ferruginous and carbonaceous shales from the Alexandrinskoe and Saf'yanovskoe deposits (the Urals)
N.S. Arkhireeva, V.A. Kotlyarov
Ferruginous and carbonaceous shales of the Alexandrinskoe and Saf′yanovskoe massive sulfde deposits are composed of pseudomorphic chlorite, quartz and hydromica after hyaloclasts and contain quartz and plagioclase clasts, as well as zircon, apatite, rutile, siderite, barite, pyrite, marcasite, chalcopyrite, pyrrhotite, sphalerite and galena. Ferruginous shales also host hematite, maghemite, magnetite, epidote, dolomite, bornite, stutzite, rucklidgeite, altaite and pseudomorphic quartz after radiolarians. Carbonaceous shales contain organic matter, graphite, xenotime, titanite, tennantite, freibergite, acanthite, arsenopyrite and Sr alumophosphate similar to goedkenite. Pseudomorphs of apatite and quartz after foraminiferas are typical of carbonaceous shales.
Figures 3. Tables 5. References 28.
Key words: ferruginous shale, carbonaceous shale, Saf′yanovskoe deposit, Alexandrinskoe deposit, the Urals, massive sulfde deposits.
МINERALOGY № 2 2016