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Detrital cosmogenic 21Ne records decoupling of source-to-sink signals by sediment storage and recycling in Miocene to present rivers of the Great Plains, Nebraska, USA

2018; Geological Society of America; Volume: 47; Issue: 1 Linguagem: Inglês

10.1130/g45391.1

1943-2682

Hugh D. Sinclair, Finlay M. Stuart, Simon M. Mudd, Louise McCann, Zhu Tao,

Hydrology and Sediment Transport Processes

Research Article| November 16, 2018 Detrital cosmogenic 21Ne records decoupling of source-to-sink signals by sediment storage and recycling in Miocene to present rivers of the Great Plains, Nebraska, USA H.D. Sinclair; H.D. Sinclair 1School of GeoSciences, University of Edinburgh, Edinburgh EH8 9XP, UK Search for other works by this author on: GSW Google Scholar F.M. Stuart; F.M. Stuart 2Isotope Geosciences Unit, Scottish Universities Environmental Research Centre, East Kilbride G75 0QF, UK Search for other works by this author on: GSW Google Scholar S.M. Mudd; S.M. Mudd 1School of GeoSciences, University of Edinburgh, Edinburgh EH8 9XP, UK Search for other works by this author on: GSW Google Scholar L. McCann; L. McCann 1School of GeoSciences, University of Edinburgh, Edinburgh EH8 9XP, UK2Isotope Geosciences Unit, Scottish Universities Environmental Research Centre, East Kilbride G75 0QF, UK Search for other works by this author on: GSW Google Scholar Z. Tao Z. Tao 1School of GeoSciences, University of Edinburgh, Edinburgh EH8 9XP, UK2Isotope Geosciences Unit, Scottish Universities Environmental Research Centre, East Kilbride G75 0QF, UK Search for other works by this author on: GSW Google Scholar Author and Article Information H.D. Sinclair 1School of GeoSciences, University of Edinburgh, Edinburgh EH8 9XP, UK F.M. Stuart 2Isotope Geosciences Unit, Scottish Universities Environmental Research Centre, East Kilbride G75 0QF, UK S.M. Mudd 1School of GeoSciences, University of Edinburgh, Edinburgh EH8 9XP, UK L. McCann 1School of GeoSciences, University of Edinburgh, Edinburgh EH8 9XP, UK2Isotope Geosciences Unit, Scottish Universities Environmental Research Centre, East Kilbride G75 0QF, UK Z. Tao 1School of GeoSciences, University of Edinburgh, Edinburgh EH8 9XP, UK2Isotope Geosciences Unit, Scottish Universities Environmental Research Centre, East Kilbride G75 0QF, UK Publisher: Geological Society of America Received: 17 Jul 2018 Revision Received: 04 Oct 2018 Accepted: 04 Oct 2018 First Online: 16 Nov 2018 Online Issn: 1943-2682 Print Issn: 0091-7613 © 2018 Geological Society of America Geology (2019) 47 (1): 3–6. https://doi.org/10.1130/G45391.1 Article history Received: 17 Jul 2018 Revision Received: 04 Oct 2018 Accepted: 04 Oct 2018 First Online: 16 Nov 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation H.D. Sinclair, F.M. Stuart, S.M. Mudd, L. McCann, Z. Tao; Detrital cosmogenic 21Ne records decoupling of source-to-sink signals by sediment storage and recycling in Miocene to present rivers of the Great Plains, Nebraska, USA. Geology 2018;; 47 (1): 3–6. doi: https://doi.org/10.1130/G45391.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract The preservation of conglomerates far from mountainous sources is commonly interpreted in terms of tectonic or climatic forcing. To relate a depositional signal to changing conditions in source areas, the process and duration of sediment routing from source to sink need to be determined. For the first time, we quantified sediment transport histories using cosmogenic 21Ne in quartzite pebbles from modern river gravels and Neogene conglomerates from the modern and ancient North Platte River of the Great Plains of Nebraska, United States. We demonstrate that at ∼400 km distance from the Front Ranges of the Rocky Mountains, the majority of pebbles were stored in older channel deposits for up to several millions of years before being recycled; this was enabled by very slow to zero basin subsidence rates. This implies that upstream tectonic or climatic controls on surface processes were decoupled from the downstream depositional record—a result supported by the similarities in cosmogenic 21Ne values among Miocene, Pliocene, and modern river channel pebbles despite known changes in tectonic and climatic forcing. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.