Dating of two thermokarst lakes in Beiluhe Basin, Qinghai-Tibetan Plateau

被引:1
|
作者
ZhanJu Lin [1 ,2 ]
FuJun Niu [1 ]
Jing Luo [1 ]
MingHao Liu [1 ]
GuoAn Yin [1 ]
机构
[1] State Key Laboratory of Frozen Soil Engineering,Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences
[2] Key Laboratory of Highway Construction & Maintenance Technology in Permafrost Region Ministry of Transport,CCCC First Highway Consultants Co.Ltd
关键词
dating; radiocarbon; thermokarst lake; Beiluhe Basin; Qinghai-Tibet Plateau;
D O I
暂无
中图分类号
P642.14 [冻土学];
学科分类号
070501 ;
摘要
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 137 Cs and 210 Pb 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.
引用
收藏
页码:504 / 510
页数:7
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