Environmental controls on 10 Be-based catchment-averaged denudation rates along the western margin of the Peruvian Andes
Publisher DOI
Abstract
We present 10Be-based basin-averaged denudation rates for the entire western margin of the Peruvian Andes. Denudation rates range from c. 9 mm/ka to 190 mm/ka and are related neither to the subduction of the Nazca plate, nor to the current seismicity along the Pacific coast and the occurrence of raised Quaternary marine terraces. Therefore, we exclude a tectonic control on denudation on a millennial timescale. Instead, we explain >60% of the observed denudation rates with a model where erosion rates increase either with mean basin slope angles or with mean annual water discharge. These relationships suggest a strong environmental control on denudation.
Date Issued
2017
Publication Type
Article
Subject(s)
Language(s)
en
Additional Credits
Journal
Terra nova
Publisher
Blackwell Scientific Publications
ISSN
0954-4879
Access(Rights)
open.access