The Use of Carbon-14 and Tritium For Peat and Water Dynamics Characterization: Case of Čepkeliai Peatland, Southeastern Lithuania
2009
Mažeika, Jonas () | Guobytė, Rimantė (Vilnius University, M.K. Čiurlionio Str. 21/27, LT-03101, Vilnius, Lithuania) | Kibirkštis, Gintautas (Čepkeliai State Nature Reserve, Šilagėlių str. 11, Marcinkonys, LT-65303 Varėna district, Lithuania) | Petrošius, Rimantas (Institute of Geology and Geography, T. Ševčenkos Str. 13, LT-03223 Vilnius, Lithuania) | Skuratovič, Žana (Institute of Geology and Geography, T. Ševčenkos Str. 13, LT-03223 Vilnius, Lithuania) | Taminskas, Julius (Institute of Geology and Geography, T. Ševčenkos Str. 13, LT-03223 Vilnius, Lithuania)
The present investigation conducted in Čepkeliai peatland (south-eastern Lithuania) deals with two radioisotope methods - carbon-14 (<sup>14</sup>C) and tritium (<sup>3</sup>H). <sup>14</sup>C was applied to peatland chronology and sedimentation rate estimation and <sup>3</sup>H to peat water dynamics characterization. According to <sup>14</sup>C data, peatland development began since 12650-11350 years cal BP and peat accumulation since 10550-9700 years cal BP with peat accumulation rate of 0.27-0.79 mm/year in the central part of the peatland. The peat water mean residence time and basic groundwater flow was estimated to be respectively about 27±6 years and 62±15 mm based on <sup>3</sup>H data. The obtained data showed relatively undisturbed natural condition of Čepkeliai peatland in the studied sites.
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