Adaption of drainage and depositional systems to tectonic and climate forcing – New insights from terrestrial cosmogenic nuclide exposure dating in the hyperarid core of the Atacama Desert

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Title:Main Title: Adaption of drainage and depositional systems to tectonic and climate forcing – New insights from terrestrial cosmogenic nuclide exposure dating in the hyperarid core of the Atacama Desert
Description:Abstract: The timing and driver of the onset of (hyper)- aridity in the Atacama Desert is still controversial. Cosmogenic nuclides, from the hyperarid core (Coastal Cordillera between 21- 19S) indicate a Miocene age of aridity. The aridity and consequent low erosion rates result in the preservation of depositional surfaces (e.g. alluvial fans) and erosive fluvial features (e.g. inactive channels) that can be used as paleoclimate archives. Despite the long-term arid to hyperarid climate, wetter periods are recorded by fluvial features and sediment deposition of alluvial fans which can be dated with cosmogenic nuclides. The occurrence of meander systems (5km long) in the surrounding of the Huara batholith, are a clear indication that higher local run-off created by higher precipitation in small catchments led to the formation those fluvial systems/features. This study provides new ages for pluvial episodes in the Atacama Desert, including new insights about the interplay between climate and tectonic activity, creating and preserving these landscape features.
Responsible Party
Creators:Benedikt Ritter (Author), Julia Diederich (Author), Finlay Stuart (Author), Steven Binnie (Author), Andreas Bolten (Author), Tibor Dunai (Author)
Publisher:EGU General Assembly 2019
Publication Year:2019
Topic
CRC1211 Topic:Dating
Related Subproject:D1
Subjects:Keywords: Cosmogenic Nuclides, Geomorphology
File Details
Filename:EGU2019_Abstract_B.Ritter.pdf
Data Type:Text - Event Paper
File Size:35 KB
Date:Available: 07.04.2019
Mime Type:application/pdf
Language:English
Status:Completed
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Download Permission:Free
General Access and Use Conditions:According to the CRC1211DB data policy agreement.
Access Limitations:According to the CRC1211DB data policy agreement.
Licence:None
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Specific Information - Publication
Publication Status:Accepted
Review Status:Not peer reviewed
Publication Type:Event Paper
Number of Pages:1 (1 - 1)
Event:EGU General Assembly 2019
Event Type:Conference
Event Location:Vienna
Event Duration:7th of April, 2019 - 12th of April, 2019
Metadata Details
Metadata Creator:Benedikt Ritter
Metadata Created:26.06.2019
Metadata Last Updated:26.06.2019
Subproject:D1
Funding Phase:1
Metadata Language:English
Metadata Version:V50
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Dataset Downloads:4
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