Silva Guimarães, Ewerton da ; Delunel, Romain ; Schlunegger, Fritz ; Akçar, Naki ; Stutenbecker, Laura ; Christl, Marcus (2021)
Cosmogenic and geological evidence for the occurrence of a Ma-Long feedback between uplift and denudation, Chur Region, Swiss Alps.
In: Geosciences, 11 (8)
doi: 10.3390/geosciences11080339
Article, Bibliographie
This is the latest version of this item.
Abstract
We used concentrations of in situ cosmogenic 10Be from riverine sediment to quantify the basin-averaged denudation rates and sediment fluxes in the Plessur Basin, Eastern Swiss Alps, which is a tributary stream to the Alpine Rhine, one of the largest streams in Europe. We complement the cosmogenic dataset with the results of morphometric analyses, geomorphic mapping, and sediment fingerprinting techniques. The results reveal that the Plessur Basin is still adjusting to the landscape perturbation caused by the glacial carving during the Last Glacial Maximum c. 20,000 years ago. This adjustment has been most efficient in the downstream part where the bedrock comprises high erodibility North Penninic flysch and Bündnerschist, whereas glacial landforms are still prominently preserved in the upstream region, comprising low erodibility South Penninic and Austroalpine bedrock. This geomorphic observation is supported by the 10Be based denudation rate and sediment provenance analysis, which indicate a much faster sediment production in the flysch and schist lithologies. Interestingly, the reach of fast denudation has experienced the highest exhumation and rock uplift rates. This suggests that lithologic and glacial conditioning have substantially contributed to the local uplift and denudation as some of the driving forces of a positive feedback system.
| Item Type: | Article |
|---|---|
| Erschienen: | 2021 |
| Creators: | Silva Guimarães, Ewerton da ; Delunel, Romain ; Schlunegger, Fritz ; Akçar, Naki ; Stutenbecker, Laura ; Christl, Marcus |
| Type of entry: | Bibliographie |
| Title: | Cosmogenic and geological evidence for the occurrence of a Ma-Long feedback between uplift and denudation, Chur Region, Swiss Alps |
| Language: | English |
| Date: | 2021 |
| Place of Publication: | Basel |
| Publisher: | MDPI |
| Journal or Publication Title: | Geosciences |
| Volume of the journal: | 11 |
| Issue Number: | 8 |
| Collation: | 26 Seiten |
| DOI: | 10.3390/geosciences11080339 |
| Corresponding Links: | |
| Abstract: | We used concentrations of in situ cosmogenic 10Be from riverine sediment to quantify the basin-averaged denudation rates and sediment fluxes in the Plessur Basin, Eastern Swiss Alps, which is a tributary stream to the Alpine Rhine, one of the largest streams in Europe. We complement the cosmogenic dataset with the results of morphometric analyses, geomorphic mapping, and sediment fingerprinting techniques. The results reveal that the Plessur Basin is still adjusting to the landscape perturbation caused by the glacial carving during the Last Glacial Maximum c. 20,000 years ago. This adjustment has been most efficient in the downstream part where the bedrock comprises high erodibility North Penninic flysch and Bündnerschist, whereas glacial landforms are still prominently preserved in the upstream region, comprising low erodibility South Penninic and Austroalpine bedrock. This geomorphic observation is supported by the 10Be based denudation rate and sediment provenance analysis, which indicate a much faster sediment production in the flysch and schist lithologies. Interestingly, the reach of fast denudation has experienced the highest exhumation and rock uplift rates. This suggests that lithologic and glacial conditioning have substantially contributed to the local uplift and denudation as some of the driving forces of a positive feedback system. |
| Uncontrolled Keywords: | cosmogenic nuclides, sediment fingerprinting, geomorphometric analysis, positive feedback, Prättigau half-window |
| Additional Information: | This article belongs to the Special Issue Cutting Edge Earth Sciences: Three Decades of Cosmogenic Nuclides |
| Classification DDC: | 500 Science and mathematics > 550 Earth sciences and geology |
| Divisions: | 11 Department of Materials and Earth Sciences 11 Department of Materials and Earth Sciences > Earth Science 11 Department of Materials and Earth Sciences > Earth Science > Applied Sedimentary Geology |
| Date Deposited: | 17 Jan 2024 09:06 |
| Last Modified: | 17 Jan 2024 09:06 |
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| Suche nach Titel in: | TUfind oder in Google |
Available Versions of this Item
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Cosmogenic and Geological Evidence for the Occurrence of a Ma-Long Feedback between Uplift and Denudation, Chur Region, Swiss Alps. (deposited 16 Jan 2024 12:24)
- Cosmogenic and geological evidence for the occurrence of a Ma-Long feedback between uplift and denudation, Chur Region, Swiss Alps. (deposited 17 Jan 2024 09:06) [Currently Displayed]
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