Geochronological and sedimentological interpretation of interglacial aquatic sediments based on TL dating

• Autorzy: Fedorowicz S. , Gaigalas A.
• Języki publikacji: EN

Abstrakty

EN

For the first time sedimentological interpretation of absolute ages obtained by thermoluminescence method on aquatic interglacial sediments was made. The analyzed size fractions of quartz grains were 160-250, 125-160, 100-125, 80-100 and 63-80 µm. The youngest and most reliable ages from 22 analyzed samples were obtained from the following quartz grain size granulometric fractions: 160-250 µm – 3 cases, 125-160 µm – 7, 100-125 µm – 6, 80-100 µm – 3 and 63-80 µm – 2 cases. Therefore, it may be concluded that the most suitable fractions for thermoluminescence dating are 125-160 µm and 100-125 µm. While evaluating the results of thermoluminescence dating it is necessary to take into account the procedure of sampling from layers of interest, their lithological composition, first of all granulometric, sedimentary environment, including sources of material, the material getting to the load flows, transportation mode and basin differentiation. From all the granulometric fractions of a sample, age of fine-grained fraction (63-80 ěm) may be explained by the input of aeolian dust to a basin and sedimentation along with clasts brought to a lake by water flows. Aeolian sand storms performed precise multigenetic sedimentation that was active during that time. Bimodality of granulometric composition is defined by input of material from various sources of different composition. Older ages were obtained in the case of positive granulometric asymmetry. After sedimentological interpretation of thermoluminescence (TL) dating we can state that formation of aquatic fine-grained sands occurred 83.6š10 – 116.1 ±13 and 130.2 ± 15 – 276.4 ± 32 thousand years (ky) ago. Those geochronological zones coincide with interg lacial periods of Merkine (75.5-114 ky) and Snaigupele (180-280 ky) in Lithuania.

Słowa kluczowe

EN

aquatic interglacial sediments; Interglacials: Snaigupele (Drenthe-Warthe) and Merkine (eem); Lithuania; thermoluminescence (TL) dating

• Wydawca: De Gruyter
• Czasopismo: Geochronometria
• Rocznik: 2010
• Tom: Vol. 35
• Strony: 75--83
• Opis fizyczny: Bibliogr. 12 poz., rys., tab.

Twórcy

autor

Fedorowicz S.

autor

Gaigalas A.

• Department of Geomorphology and Quaternary Geology, Gdańsk University, Bażyńskiego 4, 80-950 Gdańsk, Poland.,

Bibliografia

• Gaigalas A, 2000. Correlation of 14C and OSL dating of Late Pleistocene deposits in Lithuania. Geochronometria 19: 7-12.
• Gaigalas A and Fedorowicz S, 2002. Thermoluminescence dates of Mid- and Late Pleistocene sediments in Vilkiśkes exposure, Eastern Lithuania. Geologija 38: 31-40.
• Gaigalas A and Fedorowicz S, 2007. Sedimentological interpretation thermoluminescence (TL) ages of Pleistocene aquatic sediments to follow Lithuanian example. 9th International Conference "Methods of absolute chronology", 25-27th April 2007, Gliwice,Poland. Abstracts & Programme: 67.
• Gaigalas A, Fedorowicz S and Meleśyte M, 2005, TL dates of aquatic sandy sediments of Middle-Upper Pleistocene in Lithuania. Geologija 51: 39-50.
• Gaigalas A and Pazdur A, 2004. Radiocarbon dating of Late Quaternary in Lithuania, Abstract book of 5-th Baltic stratigraphic conference, Vilnius: 44-47.
• Fedorowicz S, 2003. Interlaboratory comparison of TL dating results on the Villiiśkes profile (Lithuania). Geologija 42: 40-44.
• Fedorowicz S, 2006a, Metodyczne aspekty luminescencyjnego oznaczania wieku osadów neoplejstoceńskich Europy Środkowej (Methodological aspects of luminescence dating of Central Europe’s neopleistocene deposits). Wydawnictwo Uniwersytetu Gdańskiego: 156 pp (in Polish).
• Fedorowicz S, 2006b. TL age of Upper Pleistocene stratified deposits measured using the additive, regeneration and RT methods. Geological Quarterly 50(2): 211-218.
• Fedorowicz S and Zieliński P, 2009. Chronology of Aeolian events recorder in the Karczmiska dune (Lublin Upland) in the light of lithofacial analysis, C-14 and TL dating. Geochronometria 33: 9-17, DOI 10.2478/v10003-009-0010-8.
• Passega R, 1957. Texture as characteristic of clastic deposition. Bulletin of the Association of Petroleum Geologists 41: 1952-1984.
• Passega R, 1964. Grainsize representation by C. M. Patterns as a geological tool. Journal of Sedimentary Petrology 34(4): 830-847.
• Satkunas J and Molodkov A, 2005. Middle Pleistocene stratigraphy in the light of data from the Vilkiskes site, Eastern Lithuania. Polish Geological Institute Special Papers 16: 94-102.