Environmental controls on 10 Be-based catchment-averaged denudation rates along the western margin of the Peruvian Andes

Reber, Regina; Delunel, Romain; Schlunegger, Fritz; Litty, Camille; Madella, Andrea; Akçar, Naki; Christl, Marcus (2017). Environmental controls on 10 Be-based catchment-averaged denudation rates along the western margin of the Peruvian Andes. Terra nova, 29(5), pp. 282-293. Blackwell Scientific Publications 10.1111/ter.12274

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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.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Geological Sciences

UniBE Contributor:

Reber, Regina; Delunel, Romain; Schlunegger, Fritz; Litty, Camille; Madella, Andrea and Akçar, Naki

Subjects:

500 Science > 550 Earth sciences & geology

ISSN:

0954-4879

Publisher:

Blackwell Scientific Publications

Language:

English

Submitter:

Fritz Schlunegger

Date Deposited:

03 Aug 2017 10:29

Last Modified:

20 Sep 2017 01:31

Publisher DOI:

10.1111/ter.12274

BORIS DOI:

10.7892/boris.101155

URI:

https://boris.unibe.ch/id/eprint/101155

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