Preliminary results of CoQtz-N: A quartz reference material for terrestrial in situ cosmogenic 10Be and 26Al measurements

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:456

Article

Binnie, S. A.¹  Dewald, A.²  Heinze, S.²  Voronina, E.¹  Hein, A.³  Wittmann, H.⁴  von Blanckenburg, F.⁴  Hetzel, R.⁵  Christl, M.⁶  Schaller, M.⁷  Leanni, L.⁸  Hippe, K.⁶  Vockenhuber, C.⁶  Ivy-Ochs, S.⁶  Maden, C.⁹  Fulop, R-H^10,11  Fink, D.¹¹  Wilcken, K. M.¹¹  Fujioka, T.¹¹  Fabel, D.¹²  Freeman, S. P. H. T.¹²  Xu, S.¹²  Fifield, L. K.¹³  Akcar, N.¹⁴  Spiegel, C.¹⁵  Dunai, T. J.¹  Aumaitre, G.⁸ 

[1] Univ Cologne, Inst Geol & Mineral, Zulpicher Str 49b, D-50674 Cologne, Germany

[2] Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany

[3] Univ Edinburgh, Sch GeoSci, Drummond St, Edinburgh EH8 9XP, Midlothian, Scotland

[4] Helmholtz Ctr Potsdam, GFZ German Res Ctr Geosci, D-14473 Potsdam, Germany

[5] Westfalische Wilhelms Univ Munster, Inst Geol & Palaontol, Corrensstr 24, D-48149 Munster, Germany

[6] Swiss Fed Inst Technol, Lab Ion Beam Phys, CH-8093 Zurich, Switzerland

[7] Univ Tubingen, Dept Geosci, Wilhelmstr 56, D-72074 Tubingen, Germany

[8] Aix Marseille Univ, Coll France, CNRS, IRD,UM CEREGE 34, Technopole Environm Arbois Mediterranee,BP80, F-13545 Aix En Provence, France

[9] Swiss Fed Inst Technol, Inst Geochem & Petrol, CH-8092 Zurich, Switzerland

[10] Univ Wollongong, Sch Earth & Environm Sci, Wollongong, NSW 2522, Australia

[11] ANSTO, Lucas Heights, NSW 2234, Australia

[12] SUERC, East Kilbride G75 0QF, Scotland

[13] Australian Natl Univ, Res Sch Phys Sci & Engn, Dept Nucl Phys, Canberra, ACT 0200, Australia

[14] Univ Bern, Inst Geol Sci, Baltzerstr 1-3, Bern, Switzerland

[15] Univ Bremen, Geowissensch FB5, Postfach 330 440, D-28344 Bremen, Germany

关键词: Al-26;    Be-10;    CoQtz-N;    Cosmogenic nuclides;    Reference material;   

DOI  :  10.1016/j.nimb.2019.04.073

来源: Elsevier

【 摘 要 】

There is growing interest in geochronological applications of terrestrial in situ-produced cosmogenic nuclides, with the most commonly measured being Be-10 and Al-26 in quartz. To extract and then separate these radio-nuclides from quartz and prepare them in the oxide form suitable for accelerator mass spectrometry (AMS) requires extensive and careful laboratory processing. Here we discuss the suitability of a crushed, sieved and etched, sub-aerially exposed vein quartz specimen (CoQtz-N) to act as a reference material for chemical laboratory preparation and AMS measurements. Splits of CoQtz-N were distributed to eleven target preparation laboratories. The CoQtz-N Be-10 targets were then measured at seven different AMS facilities and five of the preparation laboratories had their Al-26 targets measured at four different AMS facilities. We show that CoQtz-N splits are sufficiently homogeneous with regard to nuclide concentrations, that it has been cleaned of any atmospheric derived (i.e. meteoric) Be-10 and that it has low concentrations of the major elements that can interfere with Be and Al extraction chemistry and AMS measurements. We derive preliminary concentrations for Be-10 and Al-26 in CoQtz-N as 2.53 +/- 0.09 x 10(6) at/g and 15.6 +/- 1.6 x 10(6) at/g, respectively, at the 95% confidence limit.

【 授权许可】

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