VANADIAN CHROMIAN GARNET IN MAFIC PYROCLASTIC ROCKS OF THE MALE-KARPATY MOUNTAINS, WESTERN CARPATHIANS, SLOVAKIA

Unusual examples of vanadian-chromian garnet have been discovered in L ower Paleozoic metamorphosed mafic pyroclastic rocks, enriched in V, C r and organic carbonaceous matter, in the Pezinok - Pernek crystalline complex of the Male Karpaty Mountains, Slovakia. The emerald-green eu hedral grains of garnet, 0.5 mm in size, with a = 11.98 +/- 0.01 angst rom, n = 1.810 +/- 0.003, D(x) = 3.75 g/cm3, contain 9.5-22.1 wt.% V2O 3, 5.5-10.9% Cr2O3, and 0.4-7.6% Al2O3, which corresponds to 27-65 mol .% goldmanite, 19-34 mol.% uvarovite, 1.5-33 mol.% grossular, and 2-5 mol.% yamatoite. The associated hydromica contains up to 9.2% V2O3 and between 0.5 and 7.2% Cr2O3. The coexisting chlorite and tremolite als o exhibit elevated levels of V and Cr. The assemblage of V,Cr-rich min erals formed at approximately 500-degrees-C as a result of thermal met amorphism induced by intrusions of granitic magma in Hercynian times.