TY  - JOUR
A1  - Saki, Adel
A1  - Moazzen, Mohssen
A1  - Oberhänsli, Roland
T1  - Mineral chemistry and thermobarometry of the staurolite-chloritoid schists from Poshtuk, NW Iran
T2  - Geological magazine
N2  - The Poshtuk metapelitic rocks in northwestern Iran underwent two main phases of regional and contact metamorphism. Microstructures, textural features and field relations indicate that these rocks underwent a polymetamorphic history. The dominant metamorphic assemblage of the metapelites is garnet, staurolite, chloritoid, chlorite, muscovite and quartz, which grew mainly syntectonically during the later contact metamorphic event. Peak metamorphic conditions of this event took place at 580 degrees C and similar to 3-4 kbar, indicating that this event occurred under high-temperature and low-pressure conditions (HT/LP metamorphism), which reflects the high heat flow in this part of the crust. This event is mainly controlled by advective heat input through magmatic intrusions into all levels of the crust. These extensive Eocene metamorphic and magmatic activities can be associated with the early Alpine Orogeny, which resulted in this area from the convergence between the Arabian and Eurasian plates, and the Cenozoic closure of the Tethys oceanic tract(s).
KW  - thermobarometry
KW  - HT/LP metamorphism
KW  - Poshtuk metapelites
KW  - northwestern Iran
Y1  - 2012
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/35549
SN  - 0016-7568
VL  - 149
IS  - 6
SP  - 1077
EP  - 1088
PB  - Cambridge Univ. Press
CY  - New York
ER  -