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dc.contributor.authorTopuz, Gultekin
dc.contributor.authorCandan, Osman
dc.contributor.authorZack, Thomas
dc.contributor.authorYilmaz, Ali
dc.date.accessioned2019-07-27T12:10:23Z
dc.date.accessioned2019-07-28T09:40:34Z
dc.date.available2019-07-27T12:10:23Z
dc.date.available2019-07-28T09:40:34Z
dc.date.issued2017
dc.identifier.issn0091-7613
dc.identifier.issn1943-2682
dc.identifier.urihttps://dx.doi.org/10.1130/G39111.1
dc.identifier.urihttps://hdl.handle.net/20.500.12418/6696
dc.descriptionWOS: 000408588700008en_US
dc.description.abstractThe East Anatolian plateau (Turkey) is extensively covered by Neogene to Quaternary volcanic-sedimentary rocks, and is characterized by an attenuated lithospheric mantle. Its pre-Neogene basement is commonly considered to consist entirely of Late Cretaceous to Oligocene oceanic accretionary complexes, formed at the junction of several continental blocks. Here we report on three main exposures of the pre-Neogene basement in this region. The exposed areas consist mainly of amphibolite-to granulite-facies metamorphic rocks, including marble, amphibolite, metapelite, metagranite, and metaquartzite. An upper amphibolite-to granulitefacies domain is equilibrated at similar to 0.7 GPa and similar to 800 degrees C at 83 +/- 2 Ma (2 sigma). U-Pb dating of magmatic zircons from the metagranite yielded a Late Ordovician-early Silurian protolith age (444 +/- 9 Ma, 2 sigma). The detrital zircons from one metaquartzite point to a Neoproterozoic-early Paleozoic provenance. Ophiolitic rocks tectonically sit on the metamorphic rocks. Both the metamorphic and ophiolitic rocks are in turn unconformably covered by lower Maastrichtian clastic rocks and reefal limestones, suggesting that the whole exhumation process and juxtaposition with the ophiolitic rocks had occurred by the early Maastrichtian. Several lines of evidence, such as (1) the absence of any indication of a former high-pressure metamorphism in the metamorphic rocks, (2) the allochthonous nature of the ophiolitic rocks, (3) the presence of metagranite with a Late Ordovician-early Silurian protolith age, and (4) the Neoproterozoic- early Paleozoic provenance of detrital zircons in the metaquartzite (in contrast to the dominance of late Paleozoic-Mesozoic crystalline rocks in the adjacent continental blocks) indicate a substantial component of continental basement beneath the Neogene to Quaternary cover. Thus, the loss of the lithospheric mantle probably resulted from lithospheric foundering processes beneath the plateau, rather than just slab steepening and break-off.en_US
dc.description.sponsorshipScientific and Technological Research Council of Turkey [114Y226]en_US
dc.description.sponsorshipWe greatly benefited from lively discussions with C. Sengor, A. Okay, and O. Gogus, and constructive reviews by B. Wernicke and two anonymous reviewers. This work was financially supported by the Scientific and Technological Research Council of Turkey (grant 114Y226).en_US
dc.language.isoengen_US
dc.publisherGEOLOGICAL SOC AMER, INCen_US
dc.relation.isversionof10.1130/G39111.1en_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.titleEast Anatolian plateau constructed over a continental basement: No evidence for the East Anatolian accretionary complexen_US
dc.typearticleen_US
dc.relation.journalGEOLOGYen_US
dc.contributor.department[Topuz, Gultekin] Istanbul Tech Univ, Avrasya Yer Bilimleri Enstitusu, TR-34469 Istanbul, Turkey -- [Candan, Osman] Dokuz Eylul Univ, Jeoloji Muhendisligi Bolumu, TR-35160 Izmir, Turkey -- [Zack, Thomas] Univ Gothenburg, Dept Earth Sci, S-40530 Gothenburg, Sweden -- [Yilmaz, Ali] Cumhuriyet Univ, Cevre Muhendisligi Bolumu, TR-58140 Sivas, Turkeyen_US
dc.contributor.authorIDTopuz, Gultekin -- 0000-0001-8690-4614; Zack, Thomas -- 0000-0003-4747-4134en_US
dc.identifier.volume45en_US
dc.identifier.issue9en_US
dc.identifier.endpage794en_US
dc.identifier.startpage791en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US


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