Generation of collision-induced Early to Middle Miocene adakitic magmas in Pertek (Tunceli) area from Eastern Anatolia postsubductional setting, Turkey
Volcanic rocks display depletion in HFSEs, Nb, Ta, and Ti, and slight negative Eu anomaly; have low HREEs, Y (
📌 3 Key Takeaways
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Objective & Hypothesis:Early to Middle Miocene andesite-dacite porphyries are well exposed to the Pertek area of Tunceli, Eastern Anatolia, and represent an example of adakite-like magma generation in Eastern Anatolia (postsubductional) collisional setting.
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Key Findings & Data:Geochemically they are high-K calc-alkaline in nature and characterized by high SiO2 (>62 wt.%), Al2 O3 (mostly >16 wt.%), Na2 O/K2 O ratio (1.3–1.7), and Sr (generally >400 ppm) contents.
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Conclusion & Impact:Volcanic rocks display depletion in HFSEs, Nb, Ta, and Ti, and slight negative Eu anomaly; have low HREEs, Y (
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters
Abstract
Early to Middle Miocene andesite-dacite porphyries are well exposed to the Pertek area of Tunceli, Eastern Anatolia, and represent an example of adakite-like magma generation in Eastern Anatolia (postsubductional) collisional setting. Mineral associations in these porphyries are composed of plagioclase (oligoclase-andesine-labradorite), amphibole (pargasite-ferropargasite), biotite, rare quartz, K-feldspar, and minor Fe-Ti oxides. Geochemically they are high-K calc-alkaline in nature and characterized by high SiO2 (>62 wt.%), Al2 O3 (mostly >16 wt.%), Na2 O/K2 O ratio (1.3–1.7), and Sr (generally >400 ppm) contents. Volcanic rocks display depletion in HFSEs, Nb, Ta, and Ti, and slight negative Eu anomaly; have low HREEs, Y (
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Cite This Article
ÇOBAN, H., KÜRÜM, S., AYDIN, P. (2022). Generation of collision-induced Early to Middle Miocene adakitic magmas in Pertek (Tunceli) area from Eastern Anatolia postsubductional setting, Turkey. Turkish Journal of Earth Sciences, Cilt: 30 - Sayı: 7, 948–972. https://ajindex.com/articles/602918
Açlan M, Altun Y (2018). Syn-collisional I-type Esenköy Pluton (Eastern Anatolia-Turkey): an indication for collision between Arabian and Eurasian plates. Journal of African Earth Sciences 142: 1–11.
Agostini S, Doglioni C, Innocenti F, Manetti P, Tonarini S et al. (2007). The transition from orogenic to intraplate Neogene magmatism in Western Anatolia and Aegean area. In: Beccaluva L, Bianchini G, Wilson M (editors). Cenozoic Volcanism in the Mediterranean Area. Geological Society of American Special Paper 418: 1–15.
Agostini S, Doglioni C, Innocenti F, Manetti P, Tonarini S (2010). On the geodynamics of the Aegean rift. Tectonophysics 488: 7–21.
Agostini S, Savaşçın MY, Di Giuseppe P, Di Stefano F, Karaoğlu Ö et al. (2019). Neogene volcanism in Elazığ-Tunceli area (eastern Anatolia): geochronological and petrological constraints. Italian Journal of Geosciences 138: 435-455.
Aksoy E, Türkmen İ, Turan M (2005). Tectonics and sedimentation in convergent margin basins: an example from the Tertiary Elazığ basin, Eastern Turkey. Journal of Asian Earth Sciences 25: 459–472.
Aktağ A, Öztüfekçi Önal A, Sayit K (2019). Geochemistry of the postcollisional Miocene mafic Tunceli Volcanics, Eastern Turkey: Implications for the nature of the mantle source and melting systematics. Geochemistry 79: 113-129.
Alonso-Perez R, Müntener O, Ulmer P (2009). Igneous garnet and amphibole fractionation in the roots of island arcs: experimental constraints on andesitic liquids. Contributions to Mineralogy and Petrology 157: 541–558.
Anders E, Grevesse N (1989). Abundances of the elements: meteoric and solar. Geochimica et Cosmochimica Acta 53: 197-214.
Atherton MP, Petford N (1993). Generation of sodium-rich magmas from the newly underplated basaltic crust. Nature 362: 144–146.
Azizi H, Asahara Y, Tsuboi M, Takemura K, Razyani S (2014). The role of the heterogenetic mantle in the genesis of adakites northeast of Sanandaj, northwestern Iran. Geochemistry 74 (1): 87-97.
Azizi H, Stern R, Topuz G, Asahara Y, Moghadam HS (2019). Late Paleocene adakitic granitoid from NW Iran and comparison with adakites in the NE Turkey: Adakitic melt generation in the normal continental crust. Lithos 346 (347): 105151. Azizi H, Daneshvar N, Mohammadi A, Asahara Y, Whattam SA et al. (2021). Early Miocene post-collision andesite in the Takab area, northwest Iran. Journal of Petrology, egab022. doi: 10.1093/ petrology/egab022 Barazangi M (1989). Continental collision zones: Seismotectonics and crustal st