Universität zu Köln

Vermeesch, Pieter ORCID: 0000-0003-3404-1209, Balco, Greg, Blard, Pierre-Henri ORCID: 0000-0002-8455-8014, Dunai, Tibor J., Kober, Florian, Niedermann, Samuel ORCID: 0000-0003-1626-5284, Shuster, David L., Strasky, Stefan, Stuart, Finlay M., Wieler, Rainer ORCID: 0000-0001-5666-7494 and Zimmermann, Laurent (2015). Interlaboratory comparison of cosmogenic Ne-21 in quartz. Quat. Geochronol., 26. S. 20 - 29. OXFORD: ELSEVIER SCI LTD. ISSN 1878-0350

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Abstract

We performed an interlaboratory comparison study with the aim to determine the accuracy of cosmogenic Ne-21 measurements in quartz. CREU-1 is a natural quartz standard prepared from amalgamated vein clasts which were crushed, thoroughly mixed, and sieved into 125-250 mu m and 250-500 mu m size fractions. 50 aliquots of CREU-1 were analyzed by five laboratories employing six different noble gas mass spectrometers. The released gas contained a mixture of 16-30% atmospheric and 70-84% nonatmospheric (predominantly cosmogenic) Ne-21, defining a linear array on the Ne-22/Ne-20-Ne-21/Ne-20 three isotope diagram with a slope of 1.108 +/- 0.014. The internal reproducibility of the measurements is 21 in good agreement with the formal analytical precision for all participating labs. The external reproducibility of the Ne-21 concentrations between labs, however, is significantly overdispersed with respect to the reported analytical precision. We report an average reference concentration for CREU-1 of 348 +/- 10 x 10(6) at [Ne-21]/g[SiO2], and suggest that the 7.1% (2 sigma) overdispersion of our measurements may be representative of the current accuracy of cosmogenic Ne-21 in quartz. CREU-1 was tied to CRONUS-A, which is a second reference material prepared from a sample of Antarctic sandstone. We propose a reference value of 320 +/- 11 x 10(6) at/g for CRONUS-A. The CREU-1 and CRONUS-A intercalibration materials may be used to improve the consistency of cosmogenic Ne-21 to the level of the analytical precision. (C) 2012 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Vermeesch, Pieter UNSPECIFIED orcid.org/0000-0003-3404-1209 UNSPECIFIED Balco, Greg UNSPECIFIED UNSPECIFIED UNSPECIFIED Blard, Pierre-Henri UNSPECIFIED orcid.org/0000-0002-8455-8014 UNSPECIFIED Dunai, Tibor J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kober, Florian UNSPECIFIED UNSPECIFIED UNSPECIFIED Niedermann, Samuel UNSPECIFIED orcid.org/0000-0003-1626-5284 UNSPECIFIED Shuster, David L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Strasky, Stefan UNSPECIFIED UNSPECIFIED UNSPECIFIED Stuart, Finlay M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wieler, Rainer UNSPECIFIED orcid.org/0000-0001-5666-7494 UNSPECIFIED Zimmermann, Laurent UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-414216
DOI:	10.1016/j.quageo.2012.11.009
Journal or Publication Title:	Quat. Geochronol.
Volume:	26
Page Range:	S. 20 - 29
Date:	2015
Publisher:	ELSEVIER SCI LTD
Place of Publication:	OXFORD
ISSN:	1878-0350
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language TERRESTRIAL ROCKS; DRY VALLEYS; NOBLE-GAS; NEON; EROSION; HE-3; LANDSCAPE Multiple languages Geography, Physical; Geosciences, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/41421