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dc.contributor.authorPoisson, Andre
dc.contributor.authorVrielynck, Bruno
dc.contributor.authorWernli, Roland
dc.contributor.authorNegri, Alessandra
dc.contributor.authorBassetti, Maria-Angela
dc.contributor.authorBuyukmeric, Yesim
dc.contributor.authorOzer, Sacit
dc.contributor.authorGuillou, Herve
dc.contributor.authorKavak, Kaan S.
dc.contributor.authorTemiz, Haluk
dc.contributor.authorOrszag-Sperber, Fabienne
dc.descriptionWOS: 000368178700015en_US
dc.description.abstractWe present here a reappraisal of the tectonic setting, stratigraphy and palaeogeography of the central part of the Sivas Basin from Palaeocene to late Miocene. The Sivas Basin is located in the collision zone between the Pontides (southern Eurasia) and Anatolia (a continental block rifted from Gondwana). The basin overlies ophiolites that were obducted onto Anatolia from Tethys to the north. The Central Anatolian Crystalline Complex (CACC) experienced similar ophiolite obduction during Campanian time, followed by exhumation and thrusting onto previously emplaced units during Maastrichtian time. To the east, crustal extension related to exhumation of the CACC created grabens during the early Tertiary, including the Sivas Basin. The Sivas Basin underwent several tectonic events during Paleogene-Neogene. The basin fill varies, with several sub-basins, each being characterised by a distinctive sequence, especially during Oligocene and Miocene. Evaporite deposition in the central part of the basin during early Oligocene was followed by mid-late Oligocene fluvio-lacustrine deposition. The weight of overlying fluvial sediments triggered salt tectonics and salt diapir formation. Lacustrine layers that are interbedded within the fluviatile sediments have locally yielded charophytes of late Oligocene age. Emergent areas including the pre-existing Sivas Basin and neighbouring areas were then flooded from the east by a shallow sea, giving rise to a range of open-marine sub-basins, coralgal reef barriers and subsiding, restricted-marine sub-basins. Utilising new data from foraminifera, molluscs, corals and nannoplankton, the age of the marine transgression is reassessed as Aquitanian. Specifically, age-diagnostic nannoplankton assemblages of classical type occur at the base of the transgressive sequence. However, classical stratigraphic markers have not been found within the planktic foraminiferal assemblages, even in the open-marine settings. In the restricted-marine sediments, there are rich planktic foraminiferal assemblages of classical type but these are of little use in stratigraphy. In contrast, the gastropod fauna indicate a Burdigalian age. Sediment reworking in the restricted-marine environments precludes stratigraphic determination. In such environments, micro- and nano-organisms experienced atypical developmental conditions. The small benthic foraminifera and associated ostracod assemblages are good indicators of salinity which varied considerably within the restricted-marine sub-basins. Some of the corals within the coralgal reefs barriers are also dated as Aquitanian. A combination of the salt tectonics and the late Miocene north-westward-verging thrusting created the present basin complexity.en_US
dc.description.sponsorshipboard of the DARIUS Programmeen_US
dc.description.sponsorshipThe board of the DARIUS Programme is kindly acknowledged for its support of our research proposals during the years 2010, 2011 and 2012. We also thank Prof. J.P.Callot (Universite de Pau et des Pays de l'Adour) and our colleagues from the University Cumhuriyet in Sivas for their help during the fieldwork in the Sivas Basin. Profs. C. Goncuoglu and S. Sen and an anonymous reviewer are acknowledged for their comments which helped us to improve the manuscript. We especially thank Prof. A.H.F. Robertson for editing the manuscript.en_US
dc.subjectCenozoic palaeogeographyen_US
dc.subjectSivas Basinen_US
dc.titleMiocene transgression in the central and eastern parts of the Sivas Basin (Central Anatolia, Turkey) and the Cenozoic palaeogeographical evolutionen_US
dc.contributor.department[Poisson, Andre -- Orszag-Sperber, Fabienne] Univ Paris 11, Sci Terre, F-91405 Orsay, France -- [Vrielynck, Bruno] Univ Paris 06, UMR CNRS 7193, ISTEP, F-75005 Paris, France -- [Wernli, Roland] Univ Geneva, Dept Geol & Paleontol, CH-1205 Geneva, Switzerland -- [Negri, Alessandra] Univ Politecn Marche, Dipartimento Sci Mare, I-60121 Ancona, Italy -- [Bassetti, Maria-Angela] Univ Perpignan, CEFREM UMR 5110, F-66860 Perpignan 9, France -- [Buyukmeric, Yesim] Bulent Ecevit Univ, Muh Faku, Jeologi Muh Dept, Zonguldak, Turkey -- [Ozer, Sacit] Dokuz Eylul Univ, Muh Faku, Jeoloji Muh Dept, Bornova, Turkey -- [Guillou, Herve] LSCE IPSL, Lab CEA CNRS UVSQ, Domaine CNRS, F-91198 Gif Sur Yvette, France -- [Kavak, Kaan S. -- Temiz, Haluk] Cumhuriyet Univ, Muh Faku, Jeoloji Bolumu, TR-58140 Sivas, Turkeyen_US
dc.contributor.authorIDNegri, Alessandra -- 0000-0002-8133-3936; Kavak, Kaan -- 0000-0002-8216-5890en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US

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