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Acta Geologica Polonica

Tytuł artykułu

Upper Campanian calciclastic turbidite sequences from the Hacımehmet area (eastern Pontides, NE Turkey): integrated biostratigraphy and microfacies analysis

Autorzy Sari, B.  Kandemır, R.  Özer, S.  Walaszczyk, I.  Görmüş, M.  Demırcan, H.  Yilmaz, C. 
Treść / Zawartość
Warianty tytułu
Języki publikacji EN
EN The upper Campanian (Cretaceous) of the Hacımehmet area (south of the city of Trabzon; Eastern Pontides) is mainly composed of calciclastic turbidites. The basinal unit of the 119 m thick succession includes thin red pelagic limestone interlayers and conglomerates dominated by volcanic clasts. The overlying upper slope and lower slope units of the sequence consist of an alternation of allochthonous calcarenite/calcirudite beds and pelagic marls and mudstones. Calcarenite/calcirudite beds dominate the upper slope unit of the succession and are composed of transported material, including benthic foraminifers, red algae, bryozoan, crinoid and rudist fragments, inoceramid bivalve prisms and neritic and pelagic carbonate lithoclasts. The occurrence of Helicorbitoides boluensis (Sirel) extracted from the calcarenite/calcirudite beds indicates a Campanian age. Identifiable rudists such as Joufia reticulata Boehm, Bournonia cf. anatolica Özer, Biradiolites cf. bulgaricus Pamouktchiev and ?Biradiolites sp. from the upper slope unit of the succession indicate a late Campanian–Maastrichtian age. The planktonic foraminifers within the red pelagic limestone beds, marls and mudstones throughout the succession consist mainly of Campanian–Maastrichtian forms and suggest mainly basinal depositional conditions. The presence of Radotruncana cf. calcarata (Cushman) accompanied by Globotruncanita elevata (Brotzen) in the basinal unit of the succession indicates an early late Campanian age for the lower part of the succession. Inoceramid bivalves have been collected from the upper part of the succession. The fauna is dominated by ‘Inoceramus’ tenuilineatus Hall and Meek, 1854 and Cataceramus haldemensis (Giers, 1964); other taxa recognised are: ‘Inoceramus’ algeriensis Heinz, 1932, Platyceramus vanuxemi (Meek and Hayden, 1860), ‘Inoceramus’ cf. nebrascensis Owen, 1852, Cataceramus aff. barabini (Morton, 1834), Cataceramus gandjaensis (Aliev, 1956), and ‘Inoceramus’ sp.; the assemblage indicates the ‘Inoceramus’ tenuilineatus Zone; corresponding to the middle–late Campanian boundary interval. The uppermost part of the succession is characterized by the presence of the trace fossils Scolicia strozzii and Scolicia isp., indicating a mixed Skolithos-Cruziana ichnofacies. This ichnofacies suggests a well-oxygenated environment.
Słowa kluczowe
PL kampan   biostratygrafia   Turcja  
EN Late Campanian   Calciclastic Turbidite   biostratigraphy   Eastern Pontides  
Wydawca Faculty of Geology of the University of Warsaw
Komitet Nauk Geologicznych PAN
Czasopismo Acta Geologica Polonica
Rocznik 2014
Tom Vol. 64, no. 4
Strony 393--418
Opis fizyczny Bibliogr. 81 poz., il.
autor Sari, B.
  • Dokuz Eylül Üniversitesi, Faculty of Engineering, Department of Geological Engineering, Tınaztepe Campus, 35160, Buca -İzmir, Turkey,
autor Kandemır, R.
  • Recep Tayyip Erdoğan University, Faculty of Engineering, Department of Geological Engineering, 53100 Rize, Turkey
autor Özer, S.
  • Dokuz Eylül Üniversitesi, Faculty of Engineering, Department of Geological Engineering, Tınaztepe Campus, 35160, Buca -İzmir, Turkey.
autor Walaszczyk, I.
  • Faculty of Geology, University of Warsaw, Al. Żwirki i Wigury 93, PL-02-089 Warszawa, Poland
autor Görmüş, M.
  • Ankara University, Faculty of Engineering, Department of Geological Engineering, 06100 Tandoğan-Ankara, Turkey
autor Demırcan, H.
  • General Directorate of Mineral Research and Exploration, Department of Geological Research, 06520 Balgat-Ankara, Turkey
autor Yilmaz, C.
  • Karadeniz Technical University, Faculty of Engineering, Department of Geological Engineering, 61080 Trabzon, Turkey
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Kolekcja BazTech
Identyfikator YADDA bwmeta1.element.baztech-059bd624-bfaa-401f-9628-3d0bb15b6d33
DOI 10.2478/agp-2014-0022