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dc.contributor.authorKusçu, İlkay
dc.contributor.authorKusçu, Gonca Gençalioğlu
dc.contributor.authorTosdal, Richard M.
dc.contributor.authorUlrich, Thomas D.
dc.contributor.authorFriedman, Richard
dc.date.accessioned2020-11-20T16:34:41Z
dc.date.available2020-11-20T16:34:41Z
dc.date.issued2010
dc.identifier.isbn978-1-86239-308-0
dc.identifier.issn0305-8719
dc.identifier.urihttps://doi.org/10.1144/SP340.19
dc.identifier.urihttps://hdl.handle.net/20.500.12809/4689
dc.descriptionWOS: 000288757500019en_US
dc.description.abstractLate Cretaceous to Middle Eocene calc-alkaline to alkaline magmatic rocks emplaced within the southeastern Anatolian orogenic belt, the most extensive magmatic belt in Turkey, result from the complex collision between the Afro-Arabian and Eurasian plates and the subduction of the southern and northern Neotethyan oceanic basins beneath the Eurasian continental margin during the Alpine-Himalayan orogeny. In a transect in east-central Turkey extending from Baskil (Elazig) to Divrigi (Sivas) to the north, and from Copler (Erzincan) to Horozkoy (Nigde) to the SW, these magmatic rocks vary in time, spatial distribution, and composition. Ar-40/Ar-39 ages supplemented by a few U-Pb ages geochronology from major plutons demonstrate a general younging of magmatism in the transect from c. 83 Ma in the south (Baskil) to c. 69 Ma in the north (Divrigi-Keban), followed by a c. 44 Ma scattered magmatic complex now found along a NE trending arcuate belt between Copler and Horoz. In general, trace element and rare earth element (REE) geochemistry in the magmatic rocks suggest two main sources for the melts: (1) a mantle-wedge and subducted oceanic lithosphere producing arc-type magma; and (2) metasomatized lithospheric mantle modified by subduction producing magmatic rocks with more metasomatized mantle and within plate signatures. The combination of geochemical and geochronological data presented herein provides a basis to reconstruct the temporal and spatial transition from subduction-related to post-collision and to late-orogenic magmatism in the eastern Mediterranean region. Subduction-related magmatism is rooted to closure of the Neo-Tethyan Ocean whereas post-collision and late orogenic-within plate-related magmatism is driven by the collision of a northern promontory of the SE Anatolian orogenic belt with northerly derived ophiolitic rocks. The magmatic transition occurs regionally in northerly to northwesterly trending belts in the southeastern Anatolian orogenic belt. The magmatism exhibit a clear shift from deep seated arc-type to late-orogenic from south (Baskil) to more deeply eroded mid-crustal plutons at the north (Divrigi), then to magmatism related to incipient slab-rupture from northeast (Copler, Kabatas, Bizmisen-Calti) to SW (Karamadazi and Horoz). The age progression follows a south-to-north geochemical trend of decreasing crustal input into mantle-derived magmas, and is explained as a consequence of slab roll-back after the collision/obduction of northerly ophiolites followed by slab steepening and incipient rupture leading to transtensional block faulting and subsidence, and thus to the preservation of near-surface magmatic products along a NE trending belt.en_US
dc.item-language.isoengen_US
dc.publisherGeological Soc Publishing Houseen_US
dc.relation.ispartofseriesGeological Society Special Publication
dc.item-rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectOrogenic belten_US
dc.titleMagmatism in the southeastern Anatolian orogenic belt: transition from arc to post-collisional setting in an evolving orogenen_US
dc.item-typebookParten_US
dc.contributor.departmentMÜ, Mühendislik Fakültesi, Jeoloji Mühendisliği Bölümüen_US
dc.contributor.authorID0000-0001-9801-6542
dc.contributor.institutionauthorKusçu, İlkay
dc.contributor.institutionauthorKusçu, Gonca Gençalioğlu
dc.identifier.doi10.1144/SP340.19
dc.identifier.volume340en_US
dc.identifier.startpage437en_US
dc.identifier.endpage460en_US
dc.relation.journalSedimentary Basin Tectonics From the Black Sea and Caucasus To the Arabian Platformen_US
dc.relation.publicationcategoryKitap Bölümü - Uluslararasıen_US


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