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Tethyan subduction and Cretaceous rift magmatism at the southern margin of Eurasia: Evidence for crustal evolution of the South Caspian Basin
Monsef, Iman1; Zhang, Zhiyong2; Shabanian, Esmaeil1; le Roux, Petrus3; Rahgoshay, Mohammad4
2022-05-01
Source PublicationEARTH-SCIENCE REVIEWS
ISSN0012-8252
Volume228Pages:34
AbstractThe Cretaceous rift magmatic activity along the southern margin of Eurasia is ideal for testing how the far-field magmatism, with alkaline to calc-alkaline igneous rocks along the Alborz range, was influenced by the Tethyan subduction zones. Our new and compiled U-Pb ages indicate that significant Cretaceous magmatism in the Iran Armenia-Turkey Plateau occurred from-141 Ma to-75 Ma, lasting-66 Ma (Valanginian to Campanian). The resultant plutonic, sub-volcanic, and volcanic rocks are incorporated within the Lower-Upper Cretaceous sedimentary successions. The integrated geochronological, geochemical, and isotopic data suggest that the primitive mamas were derived from an enriched mantle source with subduction-related signatures. The significant variations in the composition of the magmas could be due to assimilation-fractional crystallization processes (AFC). The pre-existing Paleo-Tethys subduction beneath the Turan block is considered to have provided the initial source for the mantle wedge enrichment via penetration of slab-derived components. Subsequently, the Cretaceous Neo-Tethys subduction underneath Central Iran and slab rollback led to asthenospheric upwelling, remelting of metasomatized lithospheric mantle, and extraction of primitive magmas. These early melts underwent further fractionation and contamination within the continental crust generating less-to more-evolved melts. We propose that the Neo-Tethys subduction ignited the Cretaceous rift magmatism in the Iran Armenia-Turkey Plateau and triggered the transformation of the Eurasian South Caspian Basin crust into stretched high-velocity oceanic-like crust.
KeywordTethyan subduction Cretaceous rift magmatism South Caspian Basin Iran-Armenia-Turkey Plateau Eurasia
DOI10.1016/j.earscirev.2022.104012
WOS KeywordSANANDAJ-SIRJAN ZONE ; ZIRCON U-PB ; ANATOLIAN CRYSTALLINE COMPLEX ; CENTRAL ALBORZ MOUNTAINS ; NE TURKEY IMPLICATIONS ; FAULT CENTRAL ALBORZ ; SISTAN SUTURE ZONE ; EASTERN PONTIDES ; IRAN IMPLICATIONS ; BLACK-SEA
Language英语
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000792123100001
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/105912
Collection岩石圈演化国家重点实验室
Corresponding AuthorMonsef, Iman
Affiliation1.Inst Adv Studies Basic Sci IASBS, Dept Earth Sci, 66731, Zanjan, Iran, Islamic R
2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
3.Univ Cape Town, Dept Geol Sci, Rondebosch, South Africa
4.Shahid Beheshti Univ, Fac Earth Sci, Tehran, Iran
Recommended Citation
GB/T 7714
Monsef, Iman,Zhang, Zhiyong,Shabanian, Esmaeil,et al. Tethyan subduction and Cretaceous rift magmatism at the southern margin of Eurasia: Evidence for crustal evolution of the South Caspian Basin[J]. EARTH-SCIENCE REVIEWS,2022,228:34.
APA Monsef, Iman,Zhang, Zhiyong,Shabanian, Esmaeil,le Roux, Petrus,&Rahgoshay, Mohammad.(2022).Tethyan subduction and Cretaceous rift magmatism at the southern margin of Eurasia: Evidence for crustal evolution of the South Caspian Basin.EARTH-SCIENCE REVIEWS,228,34.
MLA Monsef, Iman,et al."Tethyan subduction and Cretaceous rift magmatism at the southern margin of Eurasia: Evidence for crustal evolution of the South Caspian Basin".EARTH-SCIENCE REVIEWS 228(2022):34.
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