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Mineral chemistry and thermobarometry of the staurolite-chloritoid schists from Poshtuk, NW Iran
- 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 ◦ C and ∼ 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 oceanicThe 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 ◦ C and ∼ 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).…
Verfasserangaben: | Adel SakiORCiD, Mohssen Moazzen, Roland OberhänsliGND |
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URN: | urn:nbn:de:kobv:517-opus4-413942 |
DOI: | https://doi.org/10.25932/publishup-41394 |
ISSN: | 1866-8372 |
Titel des übergeordneten Werks (Englisch): | Postprints der Universität Potsdam : Mathematisch Naturwissenschaftliche Reihe |
Schriftenreihe (Bandnummer): | Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe (578) |
Publikationstyp: | Postprint |
Sprache: | Englisch |
Datum der Erstveröffentlichung: | 06.02.2019 |
Erscheinungsjahr: | 2012 |
Veröffentlichende Institution: | Universität Potsdam |
Datum der Freischaltung: | 06.02.2019 |
Freies Schlagwort / Tag: | HT/LP metamorphism; Poshtuk metapelites; northwestern Iran; thermobarometry |
Ausgabe: | 578 |
Seitenanzahl: | 12 |
Erste Seite: | 1077 |
Letzte Seite: | 1088 |
Quelle: | Geological Magazine 149 (2012) 6, pp. 1077–1088 DOI 10.1017/S0016756812000209 |
Organisationseinheiten: | Mathematisch-Naturwissenschaftliche Fakultät |
DDC-Klassifikation: | 5 Naturwissenschaften und Mathematik / 55 Geowissenschaften, Geologie / 550 Geowissenschaften |
Peer Review: | Referiert |
Publikationsweg: | Open Access |
Fördermittelquelle: | Cambridge University Press (CUP) |
Lizenz (Deutsch): | Keine öffentliche Lizenz: Unter Urheberrechtsschutz |
Externe Anmerkung: | Bibliographieeintrag der Originalveröffentlichung/Quelle |