SUERC AMS ion detection

Maden, C.; Anastasi, P.A.F.; Dougans, A.; Freeman, Stewart P.H.T.; Kitchen, R.L.; Klody, G.M.; Schnabel, Christoph; Sundquist, M. L.; Vanner, K.; Xu, Sheng

doi:10.1016/j.nimb.2007.01.151

Cited by 57 publications

(48 citation statements)

References 6 publications

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“…The measurements are described in detail by Maden et al (2007), Freeman et al (2007), Schnabel et al (2007), and Xu et al (2010 ). To make all subsequent calculations consistent with the updated 10 Be half-life of 1.387 ± 0.012 Myr (Chmeleff et al, 2010;Korschinek et al, 2010), the 10 Be data were re-normalised to the 2007 KNSTD standard .…”

Section: Methods and Datamentioning

confidence: 99%

Discordance between cosmogenic nuclide concentrations in amalgamated sands and individual fluvial pebbles in an arid zone catchment

Codilean

Fenton

Fabel

et al. 2014

Quaternary Geochronology

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Based on cosmogenic 10 Be and , and an associated mean denudation rate of 9.6 ± 1.1 m.Myr originating from all quartz-bearing rocks in all parts of the catchment. Thus, the cosmogenic nuclide inventories of these sands record the overall average lowering rate of the landscape. The pebbles originate from quartz vein outcrops throughout the catchment, and the episodic erosion of the latter means that the pebbles will have higher nuclide inventories than the surrounding bedrock and soil, and therefore also higher than the amalgamated sand grains. The order-of-magnitude grain size bias observed in the Gaub has important implications for using cosmogenic nuclide abundances in depositional surfaces because in arid environments, akin to our study catchment, pebble-sized clasts yield substantially underestimated palaeo-denudation rates. Our results highlight the importance of carefully considering geomorphology and grain size when interpreting cosmogenic nuclide data in depositional surfaces.

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Section: Methods and Datamentioning

confidence: 99%

Discordance between cosmogenic nuclide concentrations in amalgamated sands and individual fluvial pebbles in an arid zone catchment

Codilean

Fenton

Fabel

et al. 2014

Quaternary Geochronology

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“…Beryllium extraction was done in the Glasgow Cosmogenic Isotope Laboratories using standard methods (Kohl and Nishiizumi, 1992;Child et al, 2000). Beryllium isotope ratios in the samples and six procedural 10 Be blanks were measured at the Scottish Universities Environmental Research Centre Accelerator Mass Spectrometry Laboratory (Freeman et al, 2004;Maden et al, 2007).…”

Section: Methodsmentioning

confidence: 99%

Investigating the glacial history of the northern sector of the Cordilleran Ice Sheet with cosmogenic 10Be concentrations in quartz

Stroeven

Fabel

Codilean

et al. 2010

Quaternary Science Reviews

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“…The sample preparation and 10 Be/ 26 Al measurement procedures used in this study are described in detail in by both Wilson et al (2008) and Ballantyne et al (2009 The measurement procedures at the NERC AMS laboratory are described in detail in Maden et al (2007) and Roberts et al (2008). 10 Be/ 9 Be and 26 Al/ 27 Al ratios were measured with the 5MV NEC Pelletron accelerator mass spectrometer at the SUERC, as part of a routine Be and Al runs.…”

Section: Terrestrial Cosmogenic Nuclide Sample Preparationmentioning

confidence: 99%

Controls upon the Last Glacial Maximum deglaciation of the northern Uummannaq Ice Stream System, West Greenland

Lane

Roberts

Rea

et al. 2014

Quaternary Science Reviews

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Citation for published item:vneD FF nd oertsD hFrF nd eD fFF nd ¡ y gofighD gF nd ieliD eF nd od¡ esD eF @PHIRA 9gontrols upon the vst qlil wximum deglition of the northern ummnnq se trem ystemD est qreenlndF9D uternry siene reviewsFD WP F ppF QPREQRRF Further information on publisher's website: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. AbstractThe Uummannaq ice stream system (UISS) was a convergent cross-shelf ice stream system that operated in West Greenland during the Last Glacial Maximum (LGM). This paper presents new evidence constraining the geometry and evolution of the northern sector of the UISS and considers the factors controlling its dynamic behaviour. Geomorphological mapping, 21 new terrestrial cosmogenic nuclide (TCN) exposure ages, and radiocarbon dating constrain LGM warm-based ice stream activity in the north of the system up to 1400 m a.s.l. Intervening plateaux areas either remained ice free, or were covered by cold-based icefields. Beyond the inner fjords, topography and bathymetry forced ice flow southwards into the Uummannaq Trough, where it coalesced with ice from the south, and formed the trunk zone of the UISS.Deglaciation of the UISS began at 14.9 cal. kyr BP. Rapid retreat from the LGM limit was forced by an increase in air temperatures and rising sea level, enhanced by the bathymetric over- Greenland, which suggest ice had retreated beyond its present margin by 9-7 kyr. This demonstrates the potential importance of topographic control on calving margin stability, and its ability to override climatic forcing.

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SUERC AMS ion detection

Cited by 57 publications

References 6 publications

Discordance between cosmogenic nuclide concentrations in amalgamated sands and individual fluvial pebbles in an arid zone catchment

Discordance between cosmogenic nuclide concentrations in amalgamated sands and individual fluvial pebbles in an arid zone catchment

Investigating the glacial history of the northern sector of the Cordilleran Ice Sheet with cosmogenic 10Be concentrations in quartz

Controls upon the Last Glacial Maximum deglaciation of the northern Uummannaq Ice Stream System, West Greenland

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