Impact of glacial erosion on 10 Be concentrations in fluvial sediments of the Marsyandi catchment, central Nepal - Aix-Marseille Université Access content directly
Journal Articles Journal of Geophysical Research: Earth Surface Year : 2012

Impact of glacial erosion on 10 Be concentrations in fluvial sediments of the Marsyandi catchment, central Nepal

Abstract

Several processes contribute to denudation in high-mountain environments. Of these, glacial erosion is particularly difficult to constrain, despite its critical importance in the evolution of many mountain ranges. In this study, we present a new data set of 10Be concentrations in fluvial sediments sampled along the Marsyandi River and its main tributaries in central Nepal. We interpret the 10Be concentrations as being significantly impacted by glacially derived sediments along the Marsyandi River. Such additions complicate conventional interpretations of 10Be-derived catchment-scale denudation rates. Using a simple linear mass-conservation formulation, we invert our data set in order to separate the different denudational contributions to the observed signal, as well as to constrain their magnitude and spatial distribution. Our results suggest significant variations in glacial erosion, both in space and magnitude, within the Marsyandi catchment.

Domains

Geomorphology
Fichier principal
Vignette du fichier
godard2012impact (1).pdf (2.29 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive
Loading...

Dates and versions

hal-01537127 , version 1 (28-06-2017)

Identifiers

Cite

Vincent Godard, D. W. Burbank, D. L. Bourlès, B. Bookhagen, R. Braucher, et al.. Impact of glacial erosion on 10 Be concentrations in fluvial sediments of the Marsyandi catchment, central Nepal. Journal of Geophysical Research: Earth Surface, 2012, 117 (F3), pp.F03013. ⟨10.1029/2011JF002230⟩. ⟨hal-01537127⟩
213 View
214 Download

Altmetric

Share

Gmail Facebook X LinkedIn More