Imperial College London
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DrDylanRood

Faculty of Engineering, Department of Earth Science & Engineering

Senior Lecturer
 
 
 
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Contact

 

+44 (0)20 7594 7461d.rood

 
 
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Location

 

4.43Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Corbett:2022:10.1016/j.quageo.2022.101403,
author = {Corbett, LB and Bierman, PR and Brown, TA and Caffee, MW and Fink, D and Freeman, SPHT and Hidy, AJ and Rood, DH and Wilcken, KM and Woodruff, TE},
doi = {10.1016/j.quageo.2022.101403},
journal = {Quaternary Geochronology},
pages = {1--12},
title = {Clean quartz matters for cosmogenic nuclide analyses: An exploration of the importance of sample purity using the CRONUS-N reference material},
url = {http://dx.doi.org/10.1016/j.quageo.2022.101403},
volume = {73},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Reference materials are key for assessing inter-laboratory variability and measurement quality, and for placing analytical uncertainty bounds on sample analyses. Here, we investigate four years of data resulting from repeated processing of the CRONUS-N reference material for cosmogenic 10Be and 26Al analyses. At University of Vermont, we prepared a CRONUS-N aliquot with most of our sample batches from 2013 to 2017; these reference material samples were then distributed to four different accelerator mass spectrometry facilities, yielding 73 10Be analyses and 58 26Al analyses. We determine CRONUS-N 10Be concentrations of (2.26 ± 0.14) x 105 atoms g−1 (n = 73, mean, 1 SD) and 26Al concentrations of (1.00 ± 0.08) x 106 atoms g−1 (n = 58, mean, 1 SD). We find a reproducibility of 6.3% for 10Be and 7.7% for 26Al (relative standard deviations). We also document highly variable 27Al and Mg concentrations and a 10Be dispersion twice as large as the mean AMS analytic uncertainty. Analyses of the CRONUS-N material with and without density separation demonstrate that non-quartz minerals are present in the material and have a large impact on measured concentrations of 27Al, 10Be, and impurities; these non-quartz minerals represent only a very small portion of the total mass (0.6–0.8%) but have a disproportionally large effect on the resulting data. Our results highlight the importance of completely removing all non-quartz mineral phases from samples prior to Be/Al extraction for the determination of in situ cosmogenic 10Be and 26Al concentrations.
AU  - Corbett,LB
AU  - Bierman,PR
AU  - Brown,TA
AU  - Caffee,MW
AU  - Fink,D
AU  - Freeman,SPHT
AU  - Hidy,AJ
AU  - Rood,DH
AU  - Wilcken,KM
AU  - Woodruff,TE
DO  - 10.1016/j.quageo.2022.101403
EP  - 12
PY  - 2022///
SN  - 1871-1014
SP  - 1
TI  - Clean quartz matters for cosmogenic nuclide analyses: An exploration of the importance of sample purity using the CRONUS-N reference material
T2  - Quaternary Geochronology
UR  - http://dx.doi.org/10.1016/j.quageo.2022.101403
UR  - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000862985000001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
UR  - https://www.sciencedirect.com/science/article/pii/S1871101422001510?via%3Dihub
UR  - http://hdl.handle.net/10044/1/101623
VL  - 73
ER  -
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