EVOLUTION OF THE WESTERN CARPATHIAN GRANITE MAGMATISM: AGE, SOURCE ROCK, GEOTECTONIC SETTING AND RELATION TO THE VARISCAN STRUCTURE

Year, pages: 1994, 283 - 291

Available mineralogical, petrological and geochronological data suggest that Variscan granitoids forming the hard core of Western Carpathian basement can no more be considered as one genetic group. The most reliable, U/Pb data allow their sub-dividing into three genetic groups which show generally S-, I- and A-type characteristics with decreasing age. Probably oldest, the S-type (monazite-bearing) group is related to thickening of crust and peak metamorphic conditions. The younger I-type (allanite-bearing) tonalites record a thermal event at the end of Carboniferous and coeval occurrence of acidic and mafic magmatism. The youngest, A-type tending group with documented Permian age, may be connected with post-orogenic consolidation and deep faulting. Muscovite dehydration melting of quartz-rich mica-bearing upper crustal rocks and biotite dehydration melting of intermediate biotite- and hornblende-bearing source lithologies is supposed for the S-type and I-type groups, respectively. The S- and I-type granitoids seem to be emplaced in the upper unit of the Variscan nappe structure.

Petrik, I., Broska, I., Uher, P. 1994. EVOLUTION OF THE WESTERN CARPATHIAN GRANITE MAGMATISM: AGE, SOURCE ROCK, GEOTECTONIC SETTING AND RELATION TO THE VARISCAN STRUCTURE. In Geologica Carpathica, vol. 45, no.5, pp. 283-291. 1335-0552.

Petrik, I., Broska, I., Uher, P. (1994). EVOLUTION OF THE WESTERN CARPATHIAN GRANITE MAGMATISM: AGE, SOURCE ROCK, GEOTECTONIC SETTING AND RELATION TO THE VARISCAN STRUCTURE. Geologica Carpathica, 45(5), 283-291. 1335-0552.