Optical dating of Holocene dune sands from the Hulun Buir Desert, northeastern China

Holocene - Tập 16 Số 3 - Trang 457-462 - 2006
Shenghua Li1, Jimin Sun2
1Department of Earth Sciences, the University of Hong Kong, Pokfulam Road, Hong Kong, China
2Institute of Geology and Geophysics, Chinese Academy of Sciences, P. O. Box 9825, Beijing 100029, China

Tóm tắt

Aeolian deposits from the Hulun Buir Desert of northeastern China are studied with optically stimulated luminescence dating methods to establish the chronology of dune building phases and climatic changes since the last deglaciation. Our results indicate that wet climate, marked by dune stabilization and soil development in the Hulun Buir Desert, commenced at-11 ka ago, and this early episode of dune stabilization lasted until 4.4 ka ago. This optimum climate between -11 and -4.4 ka ago is mostly the response to the strengthened monsoon circulation and increased precipitation in the Northern Hemisphere. The environment generally became arid after - 4.4 ka ago, but the dry climate was interrupted by three phases of weak soil development occurring at - 1.8-1.4, - 1.2-1.0 and - 0.84-0.5 ka ago, respectively. Such short events of dune stabilization were associated with the warm and humid climate in historical time. However, the present dune mobilization in the Hulun Buir Desert is mainly the result of poor land-use practices (land cultivation and overgrazing) since about 300 years ago.

Từ khóa


Tài liệu tham khảo

Aitken, M.J., 1985, Thermoluminescence dating

10.1006/qres.1993.1021

10.1016/j.quascirev.2003.09.009

Goudie, A.S., 1999, Aeolian environments, sediments and landform, 1

10.1038/313105a0

10.1126/science.214.4516.59

10.1038/317130a0

10.1016/0031-0182(89)90114-4

10.1016/0031-0182(90)90116-O

10.1016/1350-4487(94)90100-7

10.1016/S0277-3791(00)00156-6

10.1016/S0031-0182(01)00443-6

Li, X.Z., 1998, Journal of Desert Research, 18, 16

10.1016/S1350-4487(96)00126-6

Murray, A.S., 2002, Geochronometria, 21, 1

10.1016/S1350-4487(99)00253-X

10.1002/esp.3290170807

10.1006/qres.1999.2042

10.18814/epiiugs/1992/v15i2/004

10.1016/1350-4487(94)90086-8

10.1016/0031-0182(87)90003-4

10.1006/qres.1993.1034

10.1038/40596

Sun, J.M., 2000, Quaternary Research, 53, 73

10.18814/epiiugs/1998/v21i1/005

10.1016/S0277-3791(98)00086-9

Sun, J.M., 2006, Paleogeography, Paleoclimatology, Paleoecology

Tan, M., 2003, Geophysical Research Letters, 30

10.1016/S0031-0182(99)00143-1

Wang, P.F., 1992, Journal of Desert Research, 12, 13

Wang, W.F., 1990, Climate in Inner Mongolia

10.1016/S0012-821X(02)00463-6

Thông tin
Thông tin xuất bản

Holocene

Tập 16 Số 3

457-462

Thông tin tác giả