Akademik Veri Yönetim Sistemi
GEOCHEMISTRY, cilt.84, sa.4, 2024 (SCI-Expanded, Scopus)
The Strandja Massif is one of the important metamorphic Massifs of T & uuml;rkiye. The Strandja Massif consists of metasedimentary, and metamagmatic rocks such as migmatite, ortho- and paragneiss, metagranite, garnet-mica- schist, calcschist and marbles. For the first time, mineral chemistry analyzes of garnet-mica schists were performed to better understand the degree of metamorphism, and possible P-T conditions were defined in the northnorthwest of the Strandja Massif. Based on almandine garnet and Fe-biotite mineral chemistry, garnet bearing mica-schist are affected by lower amphibolite facies metamorphism under 6.1 kbar pressure and approximately 547 degrees C. Moreover, detrital zircon U-Pb dating was performed on 107 points to describe the maximum depositional age of this garnet-mica schist. The youngest zircon 206Pb/238U age obtained as 198 f 17 Ma (98 % concordant, Th/U = 0.74) and the oldest 206Pb/238U age yielded as 1896.8 f 33.4 Ma (100.12 % compatible, Th/U = 0.63). Additionally, a zircon U-Pb concordia protolith age of 302.33 f 1.79 Ma was obtained from orthogneisses. In-situ rutile-in garnet U-Pb dating shows that garnet-mica schists underwent metamorphism at 119 f 49 Ma. P-T conditions and age of metamorphism show that these rocks effected by the lower amphibolite facies metamorphism during late Jurassic - early Cretaceous period.