Determining the K-content of single-grains of feldspar for luminescence dating

R. K. Smedley*, G. A. T. Duller, N. J. G. Pearce, H. M. Roberts

*Awdur cyfatebol y gwaith hwn

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

71 Dyfyniadau (Scopus)

Crynodeb

Feldspars form a solid-solution series whereby the K-content may range from 0 to 14%. LA-ICP-MS measurements for density-separated single-grains of feldspar yielded realistic concentrations of K within the range of those naturally occurring, and also highlighted the difficulty in isolating the pure end members during density-separation. No direct relationship was found between the thermal stability of the infrared-stimulated luminescence (IRSL) signal and measured K-content of individual grains. However, the brightest IRSL and post-IR IRSL signals originated from grains with ∼12% K-content. All grains giving a measurable signal had K-content between 6 and 13%, therefore it is suggested that an internal K-content of 10 ± 2% can be assumed for routine single-grain dating of density-separated K-feldspars.

Iaith wreiddiolSaesneg
Tudalennau (o-i)790-796
Nifer y tudalennau7
CyfnodolynRadiation Measurements
Cyfrol47
Rhif cyhoeddi9
Dyddiad ar-lein cynnar02 Chwef 2012
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - Medi 2012
DigwyddiadProceedings of the 13th International Conference on Luminescence and Electron Spin - Toruń, Gwlad Pŵyl
Hyd: 10 Gorff 201114 Gorff 2011

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