Sedimentological and Geochemical Records of Lower Cretaceous Carbonate Successions Around Trabzon (NE Turkey): Implications for Paleoenvironmental Evolution and Paleoclimatological Conditions of Tethys

Yılmaz, İsmail Ömer
Upper Jurassic–lower Cretaceous carbonates (Berdiga Fm.) are widely exposed in the NE Turkey. An integrated study of sedimentological and geochemical analysis was carried out on the lower Cretaceous carbonates of Berdiga Fm. in Trabzon area in order to reveal the paleoenvironmental and paleoclimatological conditions of northern Tethyan Ocean. Three microfacies types were identified corresponding to inner to slope environments. Inner platform environment developed during the Hauterivian–Aptian interval. End of the Aptian, syn-sedimentary extensional tectonic regime might probably have caused the progressive deepening of the environment, so the inner platform environment evolved into an outer platform and then into slope during the late Aptian–Albian time. Additionally, δ18O stable isotope values of the belemnites of studied section indicate that paleotemperature ranged between 25 and 26 °C during Aptian–Albian interval. Therefore warm Cretaceous climate conditions were recorded in the Eastern Pontides.


Sedimentological and stratigraphical analysis of the Cenomanian-Santonian rudist-bearing carbonate platform, northern Arabian Plate, the Sabunsuyu section, Kilis area (SE Turkey)
Mülayim, Oğuz; Yılmaz, İsmail Ömer; Özer, Sacit; Sarı, Bilal; Taslı, Kemal; Hoşgör, İzzet (2019-09-10)
Our recent studies show that the Cenomanian-Santonian carbonate sediments rich in rudists are widespread throughout southeastern Turkey. The middle-late Cenomanian Derdere Formation and Coniacian-Santonian Karababa Formation, analyzed in the Sabunsuyu section (Kilis province), is almost completely composed of limestones, with subordinate limestones with chert bands, dolomite and dolomitic limestones. On a field scale, we can distinguish rudist-rich beds rhythmically alternating with bioclastic levels compos...
Rock forming nannofossils in uppermost Jurassic Lower Cretaceous rock units of Northwest Anatolia Nannoconus and its revised taxonomy
Altıner, Sevinç (1999-01-01)
Nannoconids have been recorded in a rock-forming quantity in the uppermost Jurassic-Lower Cretaceous rock units in Northwest Anatolia, Turkey. Samples were collected from seventeen stratigraphic sections spanning the calciturbidities of the Yosunlukbayırı Formation and pelagic micrites of the Soğukçam Limestone. Because of rareness and difficulties for extracting of calcareous nannofossil species particularly zone markers in these type lithologies, nannoconids have particular attention in terms of biostrati...
Bozkurt, Erdin; PARK, RG (1995-05-01)
The protoliths of mylonitized augen gneisses exposed in the southern sector of the Menderes Massif (West Turkey) are calc-alkaline, peraluminous, S-type, late- to post-tectonic tourmaline- and garnet-bearing, two-mica leucogranites. They cut and post-date the fabrics of the 'main Menderes metamorphism' which took place between the early Eocene and early Oligocene and intrude metamorphic basement rocks comprising the so-called 'Palaeozoic schist envelope' of the massif. They are themselves cut by an extensiv...
Geochemistry and Tectonic Implications of Leucogranites and Tourmalines of the Southern Menderes Massif, Southwest Turkey
Bozkurt, Erdin; Mittwede, Steven K.; Ottley, Christopher J. (Informa UK Limited, 2006-10)
Granitoid rocks of the southern Menderes Massif, SW Turkey include widespread possibly Ediacaran high-grade granitic orthogneisses and younger (Tertiary) sheets, sills and/or dikes of variably deformed tourmaline-bearing leucogranites. The latter are confined to the immediate footwall of the regional-scale ductile southern Menderes shear zone. Although both sets of granitoid rocks are essentially calc-alkaline and peraluminous, the syn- to post-collisional tourmaline-bearing leucogranites are chemically dis...
Geochemistry of mafic rocks of the Karakaya complex, Turkey: evidence for plume-involvement in the Palaeotethyan extensional regime during the Middle and Late Triassic
Sayıt, Kaan; Göncüoğlu, Mehmet Cemal (2009-03-01)
The Karakaya Complex within the Early Mesozoic Cimmerian Orogeny in northern Turkey represents the remnants of the Palaeotethys. It includes slivers and/or mega-blocks of slightly metamorphic basic volcanic rocks associated with fossiliferous sediments as well as hypabyssal and intrusive rocks with basaltic-andesitic to ultramafic compositions. They display two distinct compositional groups; namely alkaline and variably tholeiitic. The alkaline basalt samples are more akin to oceanic-island basalts (OIB) wi...
Citation Formats
M. ÖZYURT, M. Z. KIRMACI, İ. Ö. Yılmaz, and R. KANDEMİR, “Sedimentological and Geochemical Records of Lower Cretaceous Carbonate Successions Around Trabzon (NE Turkey): Implications for Paleoenvironmental Evolution and Paleoclimatological Conditions of Tethys,” 2019, Accessed: 00, 2020. [Online]. Available: