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(Article of periodic en Anglais - 2014)

Document title

Wind erosion on the north-eastern Tibetan Plateau : constraints from OSL and U-Th dating of playa salt crust in the Qaidam Basin

Authors(s) and Affiliation(s)

HAN W. (1 2) ; MA Z. (3) ; LAI Z. (1 4) ; APPEL E. (5) ; FANG X. (6) ; YU L. (7 4) ;
(1) Key Lab. of Salt Lake Resources and Chemistry &Qinghai Inst. of Salt Lakes, CAS, Xining, CHINE
(2) State Key Lab. of Loess and Quaternary Geology, Inst. of Earth Environment, CAS, Xi'an, CHINE
(3) Key Lab. of Cenozoic Geology and Environment, Inst. of Geology and Geophysics, Chinese Academy of Sciences, Beijing, CHINE
(4) State Key Lab. of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Inst., CAS, Lanzhou, CHINE
(5) Fachbereich für Geowissenschaften, Univ., Tübingen, ALLEMAGNE
(6) Key Lab. of Continental Collision and Plateau Uplift & Inst. of Tibetan Plateau research, CAS, Beijing, CHINE
(7) Qinghai Geological Survey Inst., Xining, CHINE

Abstract

The aim of this paper is to constrain the timing of the formation of salt crusts and playas in the Qaidam Basin. Optically stimulated luminescence (OSL) and U-series dating from a pit section and from the top of a deep drill core, together with results from magnetostratigraphy and a climate proxy record correlated to the marine oxygen isotope record, are used here to determine the age of the playa plains and suggest that the salt crusts have an age of c. 0.1 Ma. This young age and the wide distribution of resistant thick salt crusts of the playa plains indicate a much lower degree of wind erosion than previously suggested. The crusts protect the surface from significant surface erosion (including sediment exhumation and unloading) and whilst some wind erosion does occur, it is unlikely to be sufficient to trigger tectonic uplift of the basin or to be a major dust source for the Loess Plateau as previously suggested

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2014, vol. 39, no6 [pp. 779-789]

Bibliographic references : 2 p.

Collation : 6 fig., 2 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3483

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
Refdoc record number (ud4) : 28681922 : Permanent link - XML version
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