Binnie S. A., Dewald A., Heinze S., Voronina E., Hein A., Wittmann H., von Blanckenburg F., Hetzel R., Christl M., Schaller M., Leanni Laetitia, Hippe K., Vockenhuber C., Ivy-Ochs S., Maden C., Fulop R. H., Fink D., Wilcken K. M., Fujioka T., Fabel D., Freeman Spht, Xu S., Fifield L. K., Akcar N., Spiegel C., Dunai T. J., Aumaitre G., Bourles D. L., Keddadouche K., Aster Team. (2019). Preliminary results of CoQtz-N : a quartz reference material for terrestrial in situ cosmogenic Be-10 and Al-26 measurements. Nuclear Instruments and Methods in Physics Research Section B : Beam Interactions with Materials and Atoms, 456, p. 203-212. ISSN 0168-583X.
Titre du document
Preliminary results of CoQtz-N : a quartz reference material for terrestrial in situ cosmogenic Be-10 and Al-26 measurements
Année de publication
2019
Auteurs
Binnie S. A., Dewald A., Heinze S., Voronina E., Hein A., Wittmann H., von Blanckenburg F., Hetzel R., Christl M., Schaller M., Leanni Laetitia, Hippe K., Vockenhuber C., Ivy-Ochs S., Maden C., Fulop R. H., Fink D., Wilcken K. M., Fujioka T., Fabel D., Freeman Spht, Xu S., Fifield L. K., Akcar N., Spiegel C., Dunai T. J., Aumaitre G., Bourles D. L., Keddadouche K., Aster Team
Source
Nuclear Instruments and Methods in Physics Research Section B : Beam Interactions with Materials and Atoms, 2019,
456, p. 203-212 ISSN 0168-583X
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.
Plan de classement
Sciences fondamentales / Techniques d'analyse et de recherche [020]
;
Géologie et formations superficielles [064]
Localisation
Fonds IRD [F B010076591]
Identifiant IRD
PAR00019761
