[102] - Neogene fluvial landscape evolution in the hyperarid core of the Atacama Desert

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Features
Citation
Ritter, B., 2018. Neogene fluvial landscape evolution in the hyperarid core of the Atacama Desert. Nature Scientific Reports, 1 - 16.
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Identification
Title(s):Main Title: Neogene fluvial landscape evolution in the hyperarid core of the Atacama Desert
Description(s):Abstract: Dating of extensive alluvial fan surfaces and fluvial features in the hyperarid core of the Atacama Desert, Chile, using cosmogenic nuclides provides unrivalled insights about the onset and variability of aridity. The predominantly hyperarid conditions help to preserve the traces of episodic climatic and/ or slow tectonic change. Utilizing single clast exposure dating with cosmogenic 10Be and 21Ne, we determine the termination of episodes of enhanced fluvial erosion and deposition occurring at ~19, ~14, ~9.5 Ma; large scale fluvial modification of the landscape had ceased by ~2–3 Ma. The presence of clasts that record pre-Miocene exposure ages (~28 Ma and ~34 Ma) require stagnant landscape development during the Oligocene. Our data implies an early onset of (hyper-) aridity in the core region of the Atacama Desert, interrupted by wetter but probably still arid periods. The apparent conflict with interpretation that favour a later onset of (hyper-) aridity can be reconciled when the climatic gradients within the Atacama Desert are considered.
Responsible Party
Creator(s):Author: Benedikt Ritter
Publisher:Nature Scientific Reports
Topic
CRC1211 Topic:Dating
Related Sub-project(s):D1, A2
Subject(s):CRC1211 Keywords: Cosmogenic Nuclides, Geochronology, Geomorphology, Tectonics
File Details
File Name:Ritter_et_al-2018b-Scientific_Reports.pdf
Data Type:Text
File Size:10181 kB (9.942 MB)
Date(s):Available: 2018-09-17
Mime Type:application/pdf
Language:English
Status:Completed
Constraints
Download Permission:Free
General Access and Use Conditions:According to the CRC1211DB data policy agreement.
Access Limitations:According to the CRC1211DB data policy agreement.
Geographic
North:-no map data
East:-
South:-
West:-
Measurement Region:Central focus area
Measurement Location:--Central focus area--
Specific Informations - Publication
Status:Accepted
Review:PeerReview
Year:2018
Type:Article
Article Type:Journal
Source:Nature Scientific Reports
Page Range:1 - 16
Metadata Details
Metadata Creator:Benedikt Ritter
Metadata Created:2019-06-20
Metadata Last Updated:2019-06-20
Subproject:D1
Funding Phase:1
Metadata Language:English
Metadata Version:V42
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