Examining of zoning garnet in the Pütürge metamorphite

Garnet is a also mineral used for metamorphism grade such as biotite, chlorite, kyanite, staurolite. In this work investigated prograd and retrograd changes of metapelitic garnets in Fe-Mn-Mg and Ca-Mg-Fe system at 600-800 °C degree, geochemical, geochronologic and mineralogic changes of garnet during settlement case of metamorphites. Garnet is extensive as a into staurolite micaschiste, biotiteschiste and amphiboliteschiste rocks. In TIMS dating method yielded grossüler and pyrop in core of garnets, but generaly garnets is almandine (XFe). Its was performed two zoning as a chemical zone and growth zone from Sm-Nd isotope analyses. Garnet minerals in the kyanite-stavrolite-garnet-muscovite-biotite schistes is rich with K. Prograde growth zoning yielded with Sm-Nd dating method . These rocks were metamorphised by medium pressure and partially high temperature and garnet growth was tetonometamorphic events during exhumation of massif. Zoning and zoning chronology in it suggest garnets in high grade pelitic rocks. Garnet zoning can be invisible In the over temperature (>800 C). In this work, garnet-biotite geothermometer were used for temperature. This temperature is approximately 650-700ºC degree. Alike, partition coefficient in garnet yielded Kd< 1. Also this rocks consist of stavrolite zone metamorphism in pelitic rocks of barrovien zone. Mineral paragenesis, garnet geochemistry, geochronology of massif suggest that it prograde metamorphism in kyanite-almandine-muscovite of amphibolite facies and retrograde metamorphism in upper greenschiste from characteristics such as chlorite and biotite minerals transform of garnet. Retrograd metamorphism has been closely related with the exhumation process of metamorphites.