Measurement of the dose in quartz in the presence of feldspar contamination.
To allow the determination of the dose in quartz in the presence of feldspar contamination, the quartz-to-feldspar optically stimulated luminescence (OSL) ratio needs to be maximised. Experiments were carried out to find the optimum procedure to bleach the feldspar by exposure to infrared light, without seriously affecting the quartz OSL signal. A single-aliquot regenerative-dose protocol is proposed which, in our samples, allows accurate measurement of the dose in quartz in the presence of feldspar contamination. The protocol also has potential use for quartz dose determination in mixed-mineral samples.
Wallinga
J
J
Department of Earth Sciences, Aarhus University, Risø National Laboratory, Roskilde, Denmark. j.wallinga@IRI.TUDelft
Murray
A S
AS
Bøtter-Jensen
L
L
D000538:Aluminum Silicates / Q000032:analysis*; D017680:Potassium Compounds / Q000032:analysis*; D011791:Quartz / Q000737:chemistry*; D015203:Reproducibility of Results; D013819:Thermoluminescent Dosimetry / Q000295:instrumentation / Q000379:methods
D000538:Aluminum Silicates; D017680:Potassium Compounds; C016447:feldspar; D011791:Quartz