Past changes in sediment dynamics in the Himalayas inferred from uranium-series isotopes

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dc.contributor.authorDosseto, Aen_AU
dc.contributor.authorHesse, PPen_AU
dc.contributor.authorFink, Den_AU
dc.contributor.authorSrivastava, Pen_AU
dc.date.accessioned2022-11-10T01:50:37Zen_AU
dc.date.available2022-11-10T01:50:37Zen_AU
dc.date.issued2012-08-05en_AU
dc.date.statistics2022-01-31en_AU
dc.description.abstractClimate variability has been setting the rhythm of the Earth’s history, but how does the landscape, in particular rivers, adapt to these changes? One possible approach to tackle this question is to investigate how sedimentary deposits have recorded changes in fluvial dynamics. As a proxy for this dynamics, we use the sediment residence time, i.e. the time spent by sediments in a catchment before export (storage in soils + fluvial transport). Recently, it has been proposed that uranium-series isotopes can be used to quantify past variations in sediment residence time. In this study, this approach is applied to alluvial deposits from the upper Ganges River, the Yamuna River and the Dun valley in the foothills of the Himalayas. The age of these deposits has been previously constrained by optically-stimulated luminescence dating and range from 0 to 40 ka. Preliminary work using lithium isotopes has shown a strong link between monsoon activity and weathering intensity. Results from this study will investigate how hillslope erosion and fluvial transport may have responded to past climatic change.en_AU
dc.identifier.citationDosseto, A., Hesse, P. P., Fink, D., & Srivastava, P. (2012). Past changes in sediment dynamics in the Himalayas inferred from uranium-series isotopes. Paper presented to the 34th International Geological Congress 2012, "Unearthing our Past and Future - Resourcing Tomorrow", Brisbane, Australia, 5-10 August 2012. (pp. 724).en_AU
dc.identifier.conferenceenddate10 August 2012en_AU
dc.identifier.conferencename34th International Geological Congress 2012, 'Unearthing our Past and Future - Resourcing Tomorrow'en_AU
dc.identifier.conferenceplaceBrisbane, Australiaen_AU
dc.identifier.conferencestartdate5 August 2012en_AU
dc.identifier.otherGC124575en_AU
dc.identifier.pagination724en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/14015en_AU
dc.language.isoenen_AU
dc.publisherAustralian Geosciences Councilen_AU
dc.subjectSedimentsen_AU
dc.subjectHimalayasen_AU
dc.subjectMountainsen_AU
dc.subjectUranium isotopesen_AU
dc.subjectClimatic changeen_AU
dc.subjectSoilsen_AU
dc.subjectGeologic depositsen_AU
dc.subjectErosionen_AU
dc.titlePast changes in sediment dynamics in the Himalayas inferred from uranium-series isotopesen_AU
dc.typeConference Abstracten_AU
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