Amphiboles of high-pressure metabasites of the mica hill region (Polar Urals, Marun-Keu range) from the collection of A. A. Chernov Geological Museum

The results of studies of amphiboles of high-pressure metabasites of the Mica hill region (Polar Urals) from the museum collection have been presented. The presence of obsolete names of amphiboles (carinthine) in the names of rocks makes the study of this group of minerals relevant. The specific identity of amphiboles was confirmed according to the new nomenclature. The analytical studies were based on optical and scanning electron microscopy, X-ray and spectroscopic methods. The detailed mineralogical-petrographic researches were resulted in discovery of amphibole apoeclogite blastomilonite, quartz-omphacite-amphibole-kyanite and amphibole-quartz-garnet eclogitoids. Iron-containing tschermakite was found in the matrix of amphibole apoeclogite blastomilonites, magnesiohornblendite and barroisite were found in porphyroblasts. Magnesiohornblendite was found in quartz-omphacite-amphibole-kyanite-containing eclogitoids, magnesiotaramite was determined in veinlets. Barroisite and large-crystalline magnesiotaramite were found in amphibole-quartz-garnet eclogitoids. The identified amphiboles testify to the fact that amphiboles of different chemical groups may be present in one type of high-pressure metabasites.