Geomorphic response to an active transpressive regime : a case study along the Chaman strike-slip fault, western Pakistan

Auteur(s) et Affiliation(s)

UL-HADI, S.

Earth and Atmospheric Sciences, Univ., Houston, Etats-Unis

KHAN, S.D.

Earth and Atmospheric Sciences, Univ., Houston, Etats-Unis

OWEN, L.A.

Dept. of Geology, Univ., Cincinnati, Etats-Unis

KHAN, A.S.

Center of Excellence in Mineralogy, Univ. of Balochistan, Quetta, Pakistan

Description :
The geomorphic response of an active transpessional stretch of the Chaman fault was studied using digital elevation model (DEM) data integrated with Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Visible and Near Infrared/Short Wave Infrared (VNIR/SWIR) and images from GeoEye-1. Geologic and geomorphic mapping helped in reconstructing the Late Quaternary landscape history of this transpessional strand of the Chaman strike-slip fault and the associated Spinatizha thrust fault in western Pakistan. Topographic analysis of a part of the transpression (the thrust bounded Roghani ridge) revealed northward growth of the Spinatizha fault. Geomorphic indices including stream length-gradient index, mountain front sinuosity, valley floor width to valley height ratios, and entrenchment of recent alluvial fan deposits were used to define the lateral growth and direction of propagation of the Spinatizha fault. left-lateral displacement along Chaman fault and uplift along the Spinatizha fault was defined using topographic analysis of the Roghani ridge and geomorphic mapping of an impressive alluvial fan, the Bostankaul fan.

Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2013, vol. 38, n°. 3, p. 250-264, nombre de pages : 15, Références bibliographiques : 2 p.

Date :
2013

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley

Langue :
Anglais