Open AccessApoultramafic metasomatites of the Enganepe Uplift (the Polar Urals)
Author(s) -
С. А. Онищенко,
А. А. Соболева
Publication year - 2021
Publication title -
vestnik geonauk
Language(s) - English
Resource type - Journals
ISSN - 2712-7761
DOI - 10.19110/geov.2021.3.2
Subject(s) - protolith , geochemistry , magnesite , geology , dolomite , metasomatism , ultramafic rock , metamorphic rock , spinel , residuum , nickel , mineral , metallurgy , magnesium , mantle (geology) , materials science , paleontology
Ultramafic rocks of the Enganepe Uplift are transformed into serpentinites, magnesite-dolomite-talc and quartz-magnesite-dolomite metasomatites belonging to the beresite-listvenite formation. All apoultramafic rocks contain high chromium and nickel inherent in protolith. Chrome-spinel of the magmatic stage is represented by alumochromite, which, in the process of metamorphic and metasomatic transformation of rocks, has been replaced by secondary chrome-spinel (subferrialumochromite, ferrichromite) and chromium-bearing magnetite. The main nickel minerals are millerite and gersdorffite. In quartz-magnesite-dolomite rocks, nickel is party contained in Ni-Cr-chlorite.