Thermally transferred luminescence in fine-grained quartz from Chinese loess: Basic observations

Potential and limits of OSL, TT-OSL, IRSL and pIRIR<sub>290</sub> dating methods applied on a Middle Pleistocene sediment record of Lake El'gygytgyn, Russia

“…The TT-OSL signal is measured after the depletion of the conventional OSL signal and a subsequent pre-heat, which is applied to induce the thermal transfer of charge. The TT-OSL signal has a saturation limit at least an order of magnitude higher than the fast component of the conventional OSL signal (Wang et al, 2007) but, in contrast to initial suggestions by Wang et al (2006), it is considerably less light sensitive than the fast bleaching OSL component (Tsukamoto et al, 2008;Jacobs et al, 2011). Infrared stimulated luminescence (IRSL) of potassium-rich feldspars has the potential to extend the datable age range because dose-response curves of K-rich feldspars or feldspar dominated luminescence emissions of polymineral fine grains show a much higher saturation dose compared to quartz.…”

“…However, the use of quartz for OSL dating is typically limited to the last 100-150 ka because of saturation effects of the quartz luminescence signal with increasing dose. Thermally transferred OSL (TT-OSL) was proposed by Wang et al (2006) to extend the age range of quartz and to provide quartz OSL dates for Middle Pleistocene sediments. The TT-OSL signal is measured after the depletion of the conventional OSL signal and a subsequent pre-heat, which is applied to induce the thermal transfer of charge.…”

An assessment of the luminescence sensitivity of Australian quartz with respect to sediment history

“…Highly sensitive samples are preferable for dating particularly young sediments with low accumulated doses (Pietsch, 2009), as well as older sediments (for example, using the proportionally dim thermally-transferred OSL signal; see Wang et al, 2006), provided they pass the criteria for the relevant dating protocols. It is therefore of benefit to understand potential causes of sensitisation of quartz within the natural system, and to identify to what degree source geology and crystal formation (Westaway, 2009) and sedimentary processes (Pietsch et al, 2008) influence sensitivity and can be used to predict the suitability of sediments for dating.…”

Mesopleistocene loess deposits in the Mamalyha 2 profile of Ukraine — interlaboratory comparison of the thermoluminescence dating results

“…7) Attempts at thermoluminescence dating of deposits older than 500 ka (both loess and aeolian sandy deposits) were made many times (among others: Fre-chen, 1999;Frechen et al, 1999;Huntley et al, 1994;Rhodes et al, 2006). In the last years the new technique (TT-OSL) has been tested for dating of very old loess deposits (Wang et al, 2006a;2006b). However, the first reliable results of thermoluminescence dating of loess up to 800 ka old from New Zealand were published by Berger et al (1992).…”