230Th/U and 14C dating of mollusc shells from the coasts of the Caspian, Barents, White and Black Seas

• Autorzy: Arslanov K. A. , Tertychny N. I. , Kuznetsov V. Yu. , Chernov S. B. , Lokshin N. V. , Gerasimova S. A , Maksimov F. E. , Dodonov A. E
• Języki publikacji: EN

Abstrakty

EN

We dated Holocene and Late Pleistocene mollusc shells collected from coastal sediments of the Caspian, Barents, White and Black Seas by means of both a modified 230Th/U method and the radiocarbon method. Essence of the modification is the removal of the surface (about 1/3 of the weight) of the mollusc shells by nitric acid as it may contain adsorbed detrital 232Th and 230Th. The 230Th/U dates of the inner part of the shells do not require detrital correction with the 232Th activity and well agree with the corresponding reservoir-corrected and calibrated 14C ages of mollusc shells with ages between 1300 and 13,500 BP. We tested the modified 230Th/U method on thick-walled and well-preserved mollusc shells from the transgression sediments of the Barentz, White and Black Seas derived during the Mikulino Interglacial (MIS 5e) and the Early Valday Glaciation (MIS 5c). The 230Th/U ages of the inner part of the shells from the Boreal (Eem) transgression sediments of the Barentz and White Seas ranged from 86 to 114 ka and those from the Karangat (Eem) transgression in the Black Sea (Maly Kut and Eltigen sections) from 95 to 115 ka. The new 230Th/U dates of the shells from the section Eltigen ranged from 100 to 125 ka.

Słowa kluczowe

EN

uranium/thorium dating; radiocarbon dating; geochronology; transgression; mollusc shells

• Wydawca: De Gruyter
• Czasopismo: Geochronometria
• Rocznik: 2002
• Tom: Vol. 21
• Strony: 49--56
• Opis fizyczny: Bibliogr. 17 poz., tab.

Twórcy

autor

Arslanov K. A.

• Geographical Research Institute, Saint-Petersburg State University, 199004, St.Petersburg, Sredny pr. 41, Russia

autor

Tertychny N. I.

• Geographical Research Institute, Saint-Petersburg State University, 199004, St.Petersburg, Sredny pr. 41, Russia

autor

Kuznetsov V. Yu.

• Geographical Research Institute, Saint-Petersburg State University, 199004, St.Petersburg, Sredny pr. 41, Russia

autor

Chernov S. B.

• Geographical Research Institute, Saint-Petersburg State University, 199004, St.Petersburg, Sredny pr. 41, Russia

autor

Lokshin N. V.

• Geographical Research Institute, Saint-Petersburg State University, 199004, St.Petersburg, Sredny pr. 41, Russia

autor

Gerasimova S. A

• Geographical Research Institute, Saint-Petersburg State University, 199004, St.Petersburg, Sredny pr. 41, Russia

autor

Maksimov F. E.

• Geographical Research Institute, Saint-Petersburg State University, 199004, St.Petersburg, Sredny pr. 41, Russia

autor

Dodonov A. E

• Geological Institute of the Russian Academy of Sciences, Moscow, Pyzhevsky Str. 7, Russia

Bibliografia

• 1. Arslanov Kh.A., 1987: Radiocarbon: Geochemistry and Geochronology. Leningrad University Publiching House. Leningrad: 300 pp. (in Russian).
• 2. Arslanov Kh.A., Evzerov V.Ja., Gerasimova S.A. and Lokshin N.V., 1981: On the age of the Boreal transgression sedimeuts on the Kola peninsula. Pleistocene Glaciation on the Eastern European Plane. Moscow: 28 – 37 (in Russian).
• 3. Arslanov Kh.A., Gerasimova S.A., Leontyev O.K., Lokshin N.V., Mamedov A.V., Rychagov G.I., Tertychny N.I. and Shirinov N.Sh. 1978: Age of Pleistocene and Holocene sediments of Caspian Sea. Bulleten Komissii po Izucheniye Chetvertichuogo Perioda 48: 39 – 48 (in Russian).
• 4. Arslanov Kh.A., Gey N.A., Ismailov Ja.A., Lokshin N.V., Gerasimova S.A. and Tertychny N.I. 1983: The age and climatic conditions of sediment formation on Late Pleistocene Sea terraces of the Kerch strait coast. Vestnik Leningradskogo Universiteta 12: 69 – 80 (in Russian).
• 5. Arslanov Kh.A., Tertychnaya T.V. and Chernov S.B., 1993: Problems and methods of dating low-activity samples by liquid scintillation method. Radiocarbon 35 (3): 393-398.
• 6. Arslanov Kh.A., Tertychny N.I., Gerasimova S.A. and Lokshin N.V., 1975: On the Pleistocene carbonate formation dating by uranium-ionium method. In: Sostojanye metodicheskikh issledovaniy v oblasti absolytnoye chronologi. Rublishing House “Nauka”, Moscow: 144 – 152 (in Russian).
• 7. Arslanov Kh.A., Tertychny N.I., Gerasimova S.A. and Lokshin N.V. 1976: On the marine mollusc shell dating by the ratio 230Th/234U. Geochemistry 11: 1724 – 1733 (in Russian).
• 8. Arslanov Kh.A., Tertychny N.I., Ostrovsky A.B., Izmailov I.A., Sheglov A.P. and Gey N.A., 1977: New data on stratigraphy and chronology of Pleistocene manine terraces of Caucasian Black Sea coast and Kerch-Taman province: In: Paleogeography and Pleistocene Sediments of South Seas. Publishnig House “Nauka”. Moscow: 61 – 68 (in Russian).
• 9. Blanchard R.L., Chevg M.H. and Potratz H.A., 1967: Uranium and Thorium Series Disequilibria in Recent and Fossil Marine Molluscan Shells. Journal of Geophysical Research 72 (18): 4745-4757.
• 10. Broecker W.S., 1963: A preliminary Evaluation of Uranium Series Inequilibrium as a Tool for Absolute Age Measurement on Marine Carbonates. Journal of Geophysical Research 68 (9): 2817-2834.
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• 12. Kaufman A., Broecker W.S., Ku T.-L. and Thurber D.L., 1971: The status of U-series methods of mollusc dating. Geochimica et Cosmochimica Acta 35 (11): 1155-1183.
• 13. Kuznetsov V.Yu., Arslanov Kh.A., Shilov V.V., Cherkashov G.A. and Maksimov F.E., 2000: Distribution of uranium and thorium in metallogenic sediments from the hydrothermal zone of the North Atlantic. Radiochemistry 6: 565 – 568 (in Russian).
• 14. Martinson D.G., Pisias N.G., Hays J.D. et al., 1987: Age dating and the orbital theory of the ice ages: development of a high resolution 0 to 300000 year chronostratigraphy. Quaternary Research 27: 1-30.
• 15. Olsson I. U. and Blake W., 1961–1962: Problems of radiocarbon dating of raised beaches, based on experience in Spitsbergen. Norsk Geogr. Tidssk. 18 (1-2): 47-64.
• 16. Starik I.E. 1959: Basis of Radiochemistry. Publishing House of USSR Academy of Sciences, Moskow-Leningrad: 400 pp (in Russan).
• 17. Veeh H.H. 1966: Th230/U238 and U234/U238 Ages of Pleistocene High Sea Level Stand. Journal of Geophysical Research 71 (14): 3379-3386.