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(Article of periodic en Anglais - 2010)

Document title

Preservation of a large-scale bedrock peneplain suggests long-term landscape stability in southern Tibet

Authors(s) and Affiliation(s)

STROBL M. (1) ; HETZEL R. (1) ; DING L. (2) ; ZHANG L. (2) ; HAMPEL A. (3) ;
(1) Inst. für Geologie und Paläontologie, Westfälische Wilhelms Univ., Münster, ALLEMAGNE
(2) Inst. of Tibetan Plateau research and Inst. of Geology and Geophysics, CAS, Beijing, CHINE
(3) Inst. für Geologie, Leibniz Univ., Hannover, ALLEMAGNE

Abstract

Here the AA. document an unusual low-relief landscape in the Lhasa block of southern Tibet where a large-scale peneplain carved into Cretaceous granitoids is well preserved north of lake Nam. Around the town of Bangoin this bedrock peneplain occurs at a constant elevation of 5,300 m in a region not affected by active faulting. The main planation surface has been incised by streams resulting in a local relief of up to 700 m. Progressive fluvial incision generated additional flat bedrock surfaces of limited extent that occur at lower elevations than the peneplain. Local hillslope gradients in the peneplain region increase with decreasing elevation, which is in marked contrast to the morphology of nearby mountain ranges that are uplifted in the footwall blocks of active normal faults. These relations demonstrate that the bedrock peneplain is the most stable geomorphic element present in southern Tibet

Source

Article of periodic

published at : Zeitschrift für Geomorphologie / ISSN 0372-8854 / CODEN ZGMPAG

Editor : Gebruder Borntraeger, Stuttgart - ALLEMAGNE (1925)

Millesime : 2010, vol. 54, no4 [pp. 453-466]

Bibliographic references : 30 ref.

Collation : 7 fig.

Language

Anglais

INIST-CNRS, Cote INIST : 8829

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1127/0372-8854/2010/0054-0023

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2012
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