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Dating of two thermokarst lakes in Beiluhe Basin,Qinghai-Tibetan Plateau
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Citation of this paper:ZhanJu Lin,FuJun Niu,Jing Luo,MingHao Liu,GuoAn Yin,2014.Dating of two thermokarst lakes in Beiluhe Basin,Qinghai-Tibetan Plateau.Sciences in Cold and Arid Regions,6(5):0504~0510.
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Author NameAffiliationE-mail
ZhanJu Lin 1. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China 2. Key Laboratory of Highway Construction & Maintenance Technology in Per zhanjulin@lzb.ac.cn 
FuJun Niu State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China  
Jing Luo State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China  
MingHao Liu State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China  
GuoAn Yin State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China  
 
Abstract:Most of the thermokarst lakes are spread appreciably in Beiluhe Basin, Qinghai-Tibet Plateau, China, where ice-rich permafrost exists. Two typical thermokarst lakes with differing area and depth were examined to ascertain their age. We obtained lake-bottom samples of 50 cm length from lake BLH-A and 25 cm length from lake BLH-B. Environmental 137Cs and 210Pb and radiocarbon age dating techniques were applied to the 50 cm and 25 cm samples, respectively. The results indicate that the initiation of BLH-A is about 800–900 a B.P., and approximately 1,450±30 a B.P. to 2,230±30 a B.P. for BLH-B. These results will provide scientific bases for sedimentological study and thermokarst activity in Beiluhe Basin.
keywords:dating  radiocarbon  thermokarst lake  Beiluhe Basin  Qinghai-Tibet Plateau
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