Estimating recent sedimentation rates using 210 PB on the example of morphologically complex lake (Upper Lake Raduńskie, N Poland)

• Autorzy: Tylmann W.
• Języki publikacji: EN

Abstrakty

EN

Upper Lake Raduńskie is a classical channel lake with a typical complexity of lake basin morphology. This study presents the results of 210Pb measurements in four cores of recent sediments taken from different parts of the lake. The unsupported 210Pb activity plotted on a logarithmic scale against the cumulative dry mass decreased almost linearly. Sedimentation rates were determined from the mean slope of the profile (CF:CS model). A diversity of calculated values was significant, the highest value was found in the core RAD02/6 located in the deepest part of the lake. Both 210Pb inventories and fluxes were higher than that expected from atmospheric fallout estimated for this part of Europe. Factors influencing differences between atmospheric fallout and sediment record may include inputs from the catchment and sediment focusing, which seems to be the main reason of sedimentation rates diversity in morphologically complex lakes.

Słowa kluczowe

EN

sedimentation rate; sediment focusing; 210Pb; channel lake; Lake Raduńskie

• Wydawca: De Gruyter
• Czasopismo: Geochronometria
• Rocznik: 2004
• Tom: Vol. 23
• Strony: 21--26
• Opis fizyczny: Bibliogr. 23 poz., rys., tab.

Twórcy

autor

Tylmann W.

• Department of Geomorphology and Quaternary Geology, Gdańsk University, Dmowskiego 16a, 80-264 Gdańsk, Poland

Bibliografia

• 1. Appleby P.G., 1998: Dating recent sediments by 210Pb: problems and solutions. In: Illus E., ed., Dating of sediments and determination of sedimentation rate. STUK A-145, Finland: 7-24.
• 2. Appleby P.G., 2001: Chronostratigraphic techniques in recent sediments. In: Last W.M. and Smol J.P., eds, Tracking Environmental Change Using Lake Sediments. Volume 1 – Basin Analysis, Coring, and Chronological Techniques. Kluwer: 171-203.
• 3. Benoit G. and Hemond H.F., 1991: Evidence for diffusive redistribution of 210Pb in lake sediments. Geochemica et Cosmochimica Acta 55: 1963-1975.
• 4. Borowiak D., 2003: Influence of horizontal water exchange intensity on epilimnion depth: Case study on Upper Raduńskie Lake. Limnological Review 3: 17-24.
• 5. Crusius J. and Anderson R.F., 1995: Sediment focusing in six small lakes inferred from radionuclide profiles. Journal of Paleolimnology 13: 143-155.
• 6. Gąsiorowski M. and Hercman H., 2003: Blaski i cienie datowania osadów metodą 210Pb – kilka przykładów z polskich jezior (Ups and downs of 210Pb dating method - a few examples from Polish lakes), VII Ogólnopolska Sesja Naukowa Datowanie minerałów i skał. ING PAN, Warszawa: 25-29 (in Polish).
• 7. Gołębiewski R., 1976: Osady denne Jezior Raduńskich. (Bottom sediments of the Raduńskie Lakes.) GTN, Gdańsk: 90 pp. (in Polish).
• 8. Gołębiewski R., Bojanowski R., Tylmann W., Białkowski M., Kępińska U. and Fedorowicz S., 2001: Tempo współczesnej sedymentacji osadów w jeziorach wybranych pojezierzy młodoglacjalnych (Recent sedimentation rates in lakes of the chosen late-glacial lakeland.). In: Karczewski A. and Zwoliński Z., eds, Funkcjonowanie geoekosystemów w zróżnicowanych warunkach morfoklimatycznych. Monitoring, ochrona, edukacja. Bogucki Wydawnictwo Naukowe, Poznań: 143-156 (in Polish).
• 9. Goslar T., Ganowicz M., Czernik J. and Sikorski J., 2000: First measurements of natural activities of 210Pb in the Institute of Physics, Silesian University of Technology. Geochronometria 18: 29-34.
• 10. Håkanson L. and Jansson M., 2002: Principles of Lake Sedimentology. The Blackburn Press, Caldwell: 316 pp.
• 11. Jakubowska A., Tylmann W. and Dworniczak J., 2003: Zmienność współczesnych osadów dennych w zróżnicowanym morfometrycznie jeziorze rynnowym. Wyniki wstępne. (Recent sediments in morphologically complex, channel lake. Preliminary results). In: Gołębiewski R., ed., Ewolucja Pojezierzy i Pobrzeży Południowobałtyckich. Katedra Geomorfologii i Geologii Czwartorzędu UG, Gdańsk: 87-93 (in Polish).
• 12. Jones B.F. and Bowser C.J., 1978: The Mineralogy and Related Chemistry of Lake Sediments. In: Lerman A., ed., Lakes. Chemistry, Geology and Physics. Springer Verlag, New York: 179-235.
• 13. Kotarba A., £okas E. and Wachniew P., 2002: 210Pb dating of young Holocene sediments in high-mountains lakes of the Tatra Mountains. Geochronometria 21: 73-77.
• 14. Krishnaswamy S. and Lal D., 1978: Radionuclide Limnochronology. In: Lerman A., ed., Lakes. Chemistry, Geology and Physics. Springer Verlag, New York: 153-177.
• 15. Okulanis E., 1966: Morfologia i batymetria Jezior Raduńskich (Morphology and bathymetry of the Raduńskie Lakes). Zesz. Geogr. WSP w Gdańsku 8: 261-287 (in Polish).
• 16. Okulanis E., 1982: Rola jezior w kształtowaniu powierzchniowych zasobów wodnych Pojezierza Kaszubskiego (The role of lakes in the surface water supplies of the Cassubian Lake District). Zesz. Nauk. UG. Rozprawy i Monografie 37, Gdańsk: 233 pp. (in Polish).
• 17. Oldfield F. and Appleby P.G., 1984: Empirical testing of 210Pbdating models for lake sediments. In: Haworth E.Y. and Lund J.W.G., eds., Lake Sediments and Environmental History. Leicester University Press: 93-124.
• 18. Robbins J.A. and Edgington D.N., 1975: Determination of recent sedimentation rates in Lake Michigan using Pb-210 and Cs-137. Geochemica et Cosmochimica Acta 39: 285-304.
• 19. San Miguel E.G., Bolívar J.P. and García-Tenorio R., 2003: Mixing, sediment accumulation and focusing using 210Pb and 137Cs. Journal of Paleolimnology 29: 1-11.
• 20. Sikorski J. and Bluszcz A., 2003: Testing applicability of 210Pb method to date sediments of human-made Lake Kozłowa Góra. Geochronometria 22: 63-66.
• 21. Smith J.N., 2001: Why should we believe 210Pb sediment geochronologies?. Journal of Environmental Radioactivity 55: 121-123.
• 22. Tylmann W., 2003: Reliability of dating recent lake sediments on the example of a small and shallow reservoir (Pusty Staw, N Poland). Limnological Review 3: 255-260.
• 23. Tylmann W. and Białkowski M., 2002: Recent sedimentation rates in Lake Druzno (Vistula River Delta). Limnological Review 2: 417-424.