Biostratigraphy of Thanetian-ilerdian Benthic Foraminifera in the Akçataş-Cebeci (NW Tosya-SE Kastamonu) region

Yıl 2008, Cilt: 137 Sayı: 137, 49 - 59, 01.06.2008

Nazire Özgen

Öz

In this study, the benthic foraminiferal biostratigraphy and paleoecological features of Thanetian- Ilerdian unit were investigated in the northwest of Tosya (SE Kastamonu). The range of the unit, which had been determined as Paleocene-Eocene by former studies, was established as Thanetian-Ilerdian after conducting detailed paleontological research works on this unit. The unit begins with conglomerates from the base and continues with sandstones, sandy limestones and limestones upwards. Haymanella paleocenica Sirel, Idalina sinjaica Grimsdale, Mississippina binkhorsti (Reuss) and Pseudocuvillierina? sp. was described in the Thanetian levels of the unit. The Ilerdian levels are characterized by the following benthic foraminifera assemblages: Glom- alveolina lepidula Schwager, G. subtilis Hottinger, G. pilula Hottinger, G. karsica Sirel, Alveolina ellipsoidalis Schwager, A. moussoulensis Hottinger, A. corbarica Hottinger, A. laxa Hottinger, A. ilerdensis Hottinger, A. minervensis Hottinger, A. subpyrenaica Leymerie, A. decipiensis Schwager, A. aff. pisella Drobne, A. erki Acar, A. trempina Hottinger, A. aragonensis Hottinger, Orbitolites complanatus Lamarck, O. megasphericus Zhang, Opertorbitolites lehmanni Montanari. The fossil content and sedimentological features indicate deposition in a shallow restricted platform (10-30 m depth) with low energy at the beginning and subsequently in a deeper carbonate shelf environment (40-80 m) conditions.

Anahtar Kelimeler

Benthic Foraminifera, Ilerdian, Thanetian, Tosya

Kaynakça

• Ayaroğlu, H. 1980. Tosya kuzeybatısının (Karadere) jeolojisi ve ekonomik olanakları. Jeoloji Mühendisliği, 10, 65-73 (In Turkish).
• Blumental, M. 1939. Über den stand der geologischen aufnahmen im Ilgaz Dağ.). Maden Tetkik Arama Genel Müdürlüğü Report No: 842, 35s. Ankara (unpublished).
• Blumental, M. ,1948. Bolu civarı ile Aşağı Kızılırmak arasındaki Kuzey Anadolu Silsilelerinin jeolojisi.). Maden Tetkik Arama Genel Müdürlüğü yayınları seri B, no, 13, 71-119) (In Turkish).
• Blumental, M. ,1950. Orta ve aşağı Yeşilırmak bölgelerinin jeolojisi. Maden Tetkik Arama Genel Müdürlüğü Yayınları seri D, no, 4, 153s (In Turkish).
• Coulant, E. 1894. Kastamonu vilayeti Çiban Köyü Nikel Yatakları. Maden Tetkik Arama Genel Müdürlüğü Report No: 1398, 12s. Ankara (in Turkish) (unpublished).
• Grenier, G.O.G. 1969. Recent benthic foraminifera, environmental factors controlling their deposition. Nature, 223, 168-170
• Hallock, P. and Glenn, E.C. 1986. Larger Foraminifera: A Tool for Paleoenvironmental Analysis of Cenozoic Carbonate Depositional Facies. Palaios, 1, 55-64.
• Henson, F.R.S. 1950. Middle Eastern Tertiary Peneroplidae (Foraminifera) with remarks on the phylogeny and taxonomy of the family. West Yorkshire Printing Co., 70p.
• Hottinger, L. 1960. Recherches sur les alveolines du Paléogene et de I'Eocene. Mémoires Suisses de Paléontologie, 75-76, 1-236.
• Hottinger, L. 1977. Foraminiféres Operculiniformes. Mé- moirs du Museum d'Histoire Naturelle, 40, 1-159.
• Hottinger, L., 1997. Shallow benthic foraminiferal assemblages as signals for depth of their limitations. Bulletin de la Société Géologique France, 168/ 4, 491-505.
• Hottinger, L., and Dreher, D. 1974. Differentiation of protoplasm in Nummulitidae (Foraminifera) from Elat, Red Sea. Marine Biology, 25, 41-61.
• Larsen, A.R. 1976. Studies of Recent Amphistegina: taxonomy and some ecological aspects. Israel Journal Earth Science, 25, 1-26.
• Lutherbacher, H.P. 1970. Environmental distribution of early Tertiary microfossils, Tremp Basin, North-eastern Spain. ESSO Production Research- European Laboratories, 46p.
• Murray, J.M. 1973. Distribution and ecology of living benthic foraminiferids. New York, Crane, Russak and Co., 274 p.
• Örçen, S., Yıldız, A. and Toker, V. 1994. Yukarýsaz- caðýz yöresi (Gürün KB, Sivas) Lütesiyen'inin biyostratigrafik olaylarý ve paleoekolojisi. Türkiye Jeoloji Bülteni, 9, 97-108 (in Turkish).
• Özgen, N. 1998. Batý Pontid'lerin Paleosen-Eosen bentik foraminifer topluluklarý. Türkiye Jeoloji Bülteni, 41 /2, 63-78 (in Turkish).
• Özgen Erdem, N., İnan, N., Akyazı, M. and Tunoğlu C. 2005. Benthonic foraminiferal assemblages and microfacies analysis of Paleocene-Eocene carbonate rocks in the Kastamonu region, Northern Turkey. Journal of Asian Earth Sciences, 25/3, 403-417.
• Pilz R. 1937. Kastamonu ve Sinop vilayetlerindeki çeþitli mineral yataklarýnýn tetkiki. Maden Tetkik Arama Genel Müdürlüðü Report No: 644. Ankara (in Turkish) (unpublished).
• Reis, Z. and Hottinger, L. 1984. The Gulf of Aqaba, Ecological Micropaleontology. Springer-Verlag,354 p.
• Serra-Kiel, J. Hottinger, L., Caus, E., Drobne, K., Ferrandez, C., Jauhri, A.K., Less, G., Pavlovec, R., Pignatti, J., Samso, J.M., Schaub, H., Sirel, E., Strougo, A., Tambareau, Y., Tosquella, J. and Zakrevskaya, E. 1998. Larger foraminiferal biostratigraphy of the Tethyan Paleocene and Eocene. Bulletin Société Géologique France, 169, 2, 281-299.
• Tunoğlu, C. 1992a. Devrekani havzasý (Kastamonu kuzeyi) Üst Jura-Alt Kretase yaşlı karbonat istifinde mikrofasiyes analizleri. Türkiye Petrol Jeologlarý Derneði Bülteni, 3/1, 75-86 (in Turkish).
• Tunoğlu, C. 1992b. Devrekani havzasý (Kastamonu kuzeyi) Maastrihtiyen yaþlý pelajik karbonat istifinde mikrofasiyes analizleri. Türkiye 9. Petrol Kongresi, 17-21 Þubat 1992, 112-113 (in Turkish).
• Tunoğlu, C., 1993. Devrekani Havzasının (Kastamonu kuzeyi orta Pontidler) litostratigrafi birimleri. A.Suat Erk Simpozyumu, 2-5 Eylül 1991, Ankara, 183-191 (in Turkish).
• Tunoğlu, C., 1994. Devrekani Havzası (Kastamonu Kuzeyi) Üst Paleosen-Alt-Orta Eosen yaşlı karbonat istifinde mikrofasiyes analizleri. Türkiye Jeoloji Bülteni, 37/2, 43-51 (in Turkish).
• Tüysüz, O. 1986. Kargı masifi ve dolayýndaki tektonik birliklerin ayrımı ve araştırılması (petrolojik inceleme). Doktora Tezi, İstanbul Üniversitesi, 431s. İstanbul.
• Yılmaz, Y. and Tüysüz, O. 1984. Kastamonu-Boyabat- Vezirköprü-Tosya arasýndaki bölgenin jeolojisi (Ilgaz-Kargı masiflerinin etüdü). Maden Tetkik Arama Genel Müdürlüðü Report No:7838, 275s. Ankara (in Turkish) (unpublished).