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Abstract: Three-dimensional thermoluminescence spectra are measured for different types of geological origin quartz from the Altay orogenic belt, northern Xinjiang, China. The results show striking differences which appear to be characteristic of their geological origin. Granitic quartz is dominated by emission bands at 420–430nm, 550–560nm, at a temperature of 170°C. Pegmatite quartz is characterized by an intense 480nm emission band at 170°C. Volcanic quartz has exclusive UV (340–360nm) and violet (410–430nm) emission bands. Hydrothermal quartz exhibits very different TL spectral characteristics because of different hydrothermal activity and mineralization. Only one TL peaks at 485nm/170°C was observed in sedimentary quartz. An intense 730nm emission band observed at 170°C considered generally to be characteristics of feldspar was observed in quartz from granite and hydrothermal Au-bearing quartz. This TL peak is probably related to the centre of [FeO4]0 on an Si site. All samples show an intense 990–1000nm emission band at 330°C. Identical types of quartz formed in different regions or different geological and tectonic settings can also exhibit striking differences in TL spectra. [Copyright &y& Elsevier]

Abstract: The single-aliquot regenerative-dose (SAR) protocol with optically stimulated luminenscence (OSL) was applied to measure the equivalent dose (ED) of ancient Chinese bricks ranging in age from 180 to 1600 years. In the protocol, sensitivity changes can be corrected by using OSL response to a fixed test dose during measurement. For comparative study between OSL and TL, thermoluminescence (TL) measurement procedures were also applied to determine the paleodose of the bricks. Both results of OSL and TL are in agreement with the known ages of the bricks, and the paleodose ratios(EDOSL/ EDTL) are between 0.96 and 1.21, mean value . The annual doses of the bricks, estimated by the paleodoses and the known ages, range from 5.07 to 6.79mGy/a, comparable with the measured annual dose values of the bricks. Therefore, it is concluded that the SAR protocol is a rapid and effective OSL technique to authenticate Chinese bricks. [Copyright &y& Elsevier]