Publication:
Link between concentrations of sediment flux and deep crustal processes beneath the European Alps

cris.virtual.author-orcid0000-0002-6171-1258
cris.virtualsource.author-orcidcdfc4ec0-07f6-442e-8bcc-599cb6bae439
cris.virtualsource.author-orcid2bf4a792-d450-47cc-a149-b84a1e99a4cd
dc.contributor.authorGarefalakis, Philippos Erich
dc.contributor.authorSchlunegger, Fritz
dc.date.accessioned2024-10-25T13:27:48Z
dc.date.available2024-10-25T13:27:48Z
dc.date.issued2018-01-09
dc.description.abstractLarge sediment fluxes from mountain belts have the potential to cause megafans to prograde into the neighbouring sedimentary basins. These mechanisms have been documented based from numerical modelling and stratigraphic records. However, little attention has been focused on inferring temporal changes in the concentrations of supplied sediment from coarse-grained deposits. Here, we extract changes of this variable in the field from a Late Oligocene, c. 4 km-thick suite of fluvial conglomerates situated in the North Alpine foreland basin, which evolved in response to the tectonic and erosional history of the Alps. We measure a decrease in channel depths from >2 m to <1 m and an increase in the largest grain sizes from <15 cm to >20 cm from the base to the top of the suite. These constraints are used to calculate an increase in fan surface slopes from <0.3° to >1.0° based on the Shields criteria for sediment entrainment. We combine slope and bulk grain size data with the Bagnold equation for sediment transport to infer higher concentrations of the supplied sediment. We use these shifts to propose a change towards faster erosion and a steeper landscape in the Alpine hinterland, driven by mantle-scale processes beneath the Alps.
dc.description.sponsorshipInstitut für Geologie
dc.identifier.doi10.7892/boris.108819
dc.identifier.publisherDOI10.1038/s41598-017-17182-8
dc.identifier.urihttps://boris-portal.unibe.ch/handle/20.500.12422/156755
dc.language.isoen
dc.publisherNature Publishing Group
dc.relation.ispartofScientific Reports
dc.relation.issn2045-2322
dc.relation.organizationDCD5A442C18FE17DE0405C82790C4DE2
dc.subject.ddc500 - Science::550 - Earth sciences & geology
dc.titleLink between concentrations of sediment flux and deep crustal processes beneath the European Alps
dc.typearticle
dspace.entity.typePublication
dspace.file.typetext
oaire.citation.issue1
oaire.citation.volume8
oairecerif.author.affiliationInstitut für Geologie
oairecerif.author.affiliationInstitut für Geologie
unibe.contributor.rolecreator
unibe.contributor.rolecreator
unibe.date.licenseChanged2019-10-29 04:03:33
unibe.description.ispublishedpub
unibe.eprints.legacyId108819
unibe.journal.abbrevTitleSci Rep
unibe.refereedTRUE
unibe.subtype.articlejournal

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