Petrology of the Paleogene shoshonitic volcanism in north Sarab area, NW Iran: Geochemical, Ar-Ar dating and Sr-Nd-Pb isotopic constraints
This study reports the earliest presumably known collisional magmatism of the NW Iran–eastern Turkey–Caucasus region from the north of Sarab city in East Azarbaijan province, NW Iran. Volcanic rocks of the area comprise alternating lava flows of mainly alkalibasalt, andesite, trachyandesite, dacite...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Journal of Asian Earth Sciences: X |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590056022000305 |
| _version_ | 1811178765642891264 |
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| author | Somaye Heidari Amir Ali Tabbakh Shabani Shohreh Hassanpour Reza Maghdour-Mashhour |
| author_facet | Somaye Heidari Amir Ali Tabbakh Shabani Shohreh Hassanpour Reza Maghdour-Mashhour |
| author_sort | Somaye Heidari |
| collection | DOAJ |
| description | This study reports the earliest presumably known collisional magmatism of the NW Iran–eastern Turkey–Caucasus region from the north of Sarab city in East Azarbaijan province, NW Iran. Volcanic rocks of the area comprise alternating lava flows of mainly alkalibasalt, andesite, trachyandesite, dacite and pyroclastics (tuff and ignimbrite) affiliated with high-K calk-alkaline to shoshonitic magmatic series. Ar–Ar geochronology of the glass, matrix and plagioclase laths revealed crystallization time restricted to Late Eocene to Early Oligocene (34.90–30.69 Ma) which is coincident with the onset of the Arabian-Eurasian continental collision. Geochemical data show LREE enrichment compared with HREE and Nb and Ti depletion, indicating that they are subduction related. The Sr-Nd-Pb isotopic data reflect the incorporation of oceanic sediment into the magma source. We suggest that the volcanic rocks were generated from a metasomatised subcontinental lithospheric mantle source through 5 to 10 vol% partial melting in an extensional back arc basin by the Neotethys slab roll-back under the Iranian plateau. |
| first_indexed | 2024-04-11T06:23:32Z |
| format | Article |
| id | doaj.art-f59c95477a2d41708deabe4e7b2c98f2 |
| institution | Directory Open Access Journal |
| issn | 2590-0560 |
| language | English |
| last_indexed | 2024-04-11T06:23:32Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Asian Earth Sciences: X |
| spelling | doaj.art-f59c95477a2d41708deabe4e7b2c98f22022-12-22T04:40:28ZengElsevierJournal of Asian Earth Sciences: X2590-05602022-12-018100109Petrology of the Paleogene shoshonitic volcanism in north Sarab area, NW Iran: Geochemical, Ar-Ar dating and Sr-Nd-Pb isotopic constraintsSomaye Heidari0Amir Ali Tabbakh Shabani1Shohreh Hassanpour2Reza Maghdour-Mashhour3Department of Geochemistry, Faculty of Earth Sciences, Kharazmi University, Tehran, IranDepartment of Geochemistry, Faculty of Earth Sciences, Kharazmi University, Tehran, Iran; Corresponding author.Department of Geology, Payam-e-Noor University, Karaj, IranSchool of Geosciences, Faculty of Science, University of the Witwatersrand, Johannesburg, South AfricaThis study reports the earliest presumably known collisional magmatism of the NW Iran–eastern Turkey–Caucasus region from the north of Sarab city in East Azarbaijan province, NW Iran. Volcanic rocks of the area comprise alternating lava flows of mainly alkalibasalt, andesite, trachyandesite, dacite and pyroclastics (tuff and ignimbrite) affiliated with high-K calk-alkaline to shoshonitic magmatic series. Ar–Ar geochronology of the glass, matrix and plagioclase laths revealed crystallization time restricted to Late Eocene to Early Oligocene (34.90–30.69 Ma) which is coincident with the onset of the Arabian-Eurasian continental collision. Geochemical data show LREE enrichment compared with HREE and Nb and Ti depletion, indicating that they are subduction related. The Sr-Nd-Pb isotopic data reflect the incorporation of oceanic sediment into the magma source. We suggest that the volcanic rocks were generated from a metasomatised subcontinental lithospheric mantle source through 5 to 10 vol% partial melting in an extensional back arc basin by the Neotethys slab roll-back under the Iranian plateau.http://www.sciencedirect.com/science/article/pii/S2590056022000305Volcanic rocksShoshonitic arc magmatismIsotope geochemistrySarabAlborzIran |
| spellingShingle | Somaye Heidari Amir Ali Tabbakh Shabani Shohreh Hassanpour Reza Maghdour-Mashhour Petrology of the Paleogene shoshonitic volcanism in north Sarab area, NW Iran: Geochemical, Ar-Ar dating and Sr-Nd-Pb isotopic constraints Journal of Asian Earth Sciences: X Volcanic rocks Shoshonitic arc magmatism Isotope geochemistry Sarab Alborz Iran |
| title | Petrology of the Paleogene shoshonitic volcanism in north Sarab area, NW Iran: Geochemical, Ar-Ar dating and Sr-Nd-Pb isotopic constraints |
| title_full | Petrology of the Paleogene shoshonitic volcanism in north Sarab area, NW Iran: Geochemical, Ar-Ar dating and Sr-Nd-Pb isotopic constraints |
| title_fullStr | Petrology of the Paleogene shoshonitic volcanism in north Sarab area, NW Iran: Geochemical, Ar-Ar dating and Sr-Nd-Pb isotopic constraints |
| title_full_unstemmed | Petrology of the Paleogene shoshonitic volcanism in north Sarab area, NW Iran: Geochemical, Ar-Ar dating and Sr-Nd-Pb isotopic constraints |
| title_short | Petrology of the Paleogene shoshonitic volcanism in north Sarab area, NW Iran: Geochemical, Ar-Ar dating and Sr-Nd-Pb isotopic constraints |
| title_sort | petrology of the paleogene shoshonitic volcanism in north sarab area nw iran geochemical ar ar dating and sr nd pb isotopic constraints |
| topic | Volcanic rocks Shoshonitic arc magmatism Isotope geochemistry Sarab Alborz Iran |
| url | http://www.sciencedirect.com/science/article/pii/S2590056022000305 |
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