CW-OSL, LM-OSL and TL Dating of Bricks from Karakorum, Mongolia: Insights from TL Spectra

Solongo, Saran; Tengis, Saran; Wagner, Günther A.; Hüttel, Hans-Georg

doi:10.2478/geochr-2020-0003

Cited by 3 publications

(1 citation statement)

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“…For example, Fu et al (2010) found that the initial OSL signals of burnt clay from the Qujialing archaeological site in China were all dominated by the fast component, and their OSL ages were consistent with the independent 14 C ages. When Solongo et al (2021) dated the OSL ages of two Mongolian bricks, the initial OSL of one red brick was dominated by the fast component, and the age agreed with the historical age, while the medium component of another gray brick was significant, and the dating result was underestimated. Anderson and Feathers (2019) found two types of samples with different decay rates in the OSL dating of pottery from archaeological sites in the Arctic.…”

Section: Introductionmentioning

confidence: 94%

Luminescence dating of heated quartz extracted from burnt clay and pottery excavated from the Lingjiatan archaeological site, China

Wang

Zhang²,

Zhang³

et al. 2022

Front. Earth Sci.

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This study utilizes OSL-SAR, TL-SAR, and TL-MAAD methods to date heated quartz extracted from burnt clay and pottery samples from the Lingjiatan archaeological site, China. The OSL components of the heated quartz were determined by deconvoluting the CW-OSL curve, and the Fast Ratio value was used to distinguish whether the initial OSL signal was dominated by the fast component. The results show two types of quartz OSL characteristics in the initial signals: Type I is dominated by the fast component (Fast Ratio values > 10), while Type II is dominated by the medium and slow components (Fast Ratio values < 10). Type I samples show bright OSL signals, and a preheat plateau appears from a relatively low temperature. The recuperation is negligible, and reliable equivalent doses can be obtained using the conventional OSL-SAR measurement conditions. In contrast, the OSL signal of Type II samples is relatively dim, and the preheat plateau appears from a much higher temperature than in Type I samples. The recuperation of Type II samples increases significantly at higher preheat temperatures. Significant De underestimation of Type II samples was observed at lower preheat temperatures. It is noted that the thermal transfer effect can be attenuated by increasing the OSL stimulation temperature. Therefore, a modified OSL-SAR measurement condition, with higher preheat, cut-heat and stimulation temperatures, was used to date Type II samples. The OSL-SAR ages of most of these two types of samples agree well with the independent 14C ages, demonstrating that OSL-SAR can be used to date heated archaeological materials at high firing temperatures (∼900°C). The Lingjiatan archaeological site was determined to be approximately 5.4–5.8 ka BP 2022.

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Section: Introductionmentioning

confidence: 94%