PHASE RELATIONS IN OLIVINE-ORTHOPYROXENE-CHLORITE-SPINEL-HORNBLENDE METAULTRAMAFICS FROM THE MALA FATRA MTS., WESTERN CARPATHIANS

Year, pages: 1998, 369 - 376

Metaultramafic rocks from the Mala Fatra Mts. (Western Carpathians) preserve mineral assemblages characterized by coexistence of hercynitic spinel, Ca-amphibole (Mg-hornblende), Mg-rich chlorite, olivine (forsterite) and orthopyroxene (enstatite). A large amount of hercynite and Ca-amphibole (up to 30–40 % ) is characteristic. Prograde metamorphism reached P-T conditions close to the equilibrium chlorite = forsterite + enstatite + spinel + H₂O and the upper stability of Ca-amphibole which corresponds to the temperature of about 700–800 °C in the model system CMASH. Retrograde reactions lead to the replacement of spinel by secondary chlorite, orthopyroxene by talc and olivine by serpentine. Metaultramafic rocks in the Mala Fatra Mts. reached the conditions of the upper amphibolite facies. They most probably represent the fragments of metaperidotites, attached to the lower continental crust during Variscan tectonometamorphic events.

P. Korikovsky, S., Janak, M., Luptak, B. 1998. PHASE RELATIONS IN OLIVINE-ORTHOPYROXENE-CHLORITE-SPINEL-HORNBLENDE METAULTRAMAFICS FROM THE MALA FATRA MTS., WESTERN CARPATHIANS. In Geologica Carpathica, vol. 49, no.5, pp. 369-376. 1335-0552.

P. Korikovsky, S., Janak, M., Luptak, B. (1998). PHASE RELATIONS IN OLIVINE-ORTHOPYROXENE-CHLORITE-SPINEL-HORNBLENDE METAULTRAMAFICS FROM THE MALA FATRA MTS., WESTERN CARPATHIANS. Geologica Carpathica, 49(5), 369-376. 1335-0552.