Although the OSL signal sourced from quartz is expected to be more stable and bleached more rapidly than the IRSL signal sourced from feldspar in a general sense, the former is much less investigated than the latter for rock surface related luminescence dating. It is mainly due to the difficulty in isolating quartz-dominated OSL signals from rock slices, and the low sensitivity and non-fast component dominated OSL signals for quartz in most of rocks. In merit of the sub-conduction band transition of trapped electrons of feldspar under both green light stimulation and IR stimulation at elevated temperature (Jain and Ankjӕrgaard, 2011), it is expected that the contribution of feldspars to the green light stimulated luminescence could be substantially reduced by a prior IR stimulation at elevated temperature. Meanwhile, more fast-component dominated quartz OSL signal (if there is any) could be obtained by green light stimulation (Bailey et al., 2011). Therefore, in this study, we investigated the feasibility of using the post-IR pulsed green stimulation, which is performed at 25 °C (PGLSL₂₅) following two IR stimulations (IR₅₀IR₂₂₅), to isolate the quartz-dominated OSL signals from rock slices of granite cobbles for burial dating. The decay characteristics of stimulation curve, characteristic saturation dose and thermal stability of the pIR₅₀IR₂₂₅ PGLSL₂₅ signal suggest that this signal is quartz-dominated, but still not fast-component dominated. We tentatively validated the equivalent dose (D_e) measurement protocol by dose recovery experiment. The luminescence-depth profiles show that the bleaching depths of pIR₅₀IR₂₂₅ PGLSL₂₅ signals are slightly smaller than or close to that of the IR₅₀ signals, while they are much shallower for the pIR₅₀IR₂₂₅ signals. The pIR₅₀IR₂₂₅ PGLSL₂₅ procedure enables multiple D_e values determined from luminescence signals, with different bleachabilities and stabilities, from both feldspars and quartz in one measurement, which is of potential for buried age dating of cobbles.

虽然从一般意义上来说，来自石英的 OSL 信号预计比来自长石的 IRSL 信号更稳定和漂白更快，但对于岩石表面相关的发光测年，前者的研究比后者少得多。这主要是由于难以从岩石切片中分离出以石英为主的 OSL 信号，以及大多数岩石中石英的低灵敏度和非快速分量主导的 OSL 信号。由于在绿光刺激和高温下的红外刺激下长石被俘获电子的亚导带跃迁（Jain 和 Ankjӕrgaard，2011），预计长石对绿光激发发光的贡献可能会很大在升高的温度下通过先前的 IR 刺激而减少。同时，通过绿光刺激可以获得更多以快速分量为主的石英 OSL 信号（如果有的话）（Bailey et al., 2011）。因此，在本研究中，我们研究了使用在 25 °C 下进行的红外后脉冲绿光刺激的可行性（PGLSL₂₅ ) 在两次 IR 刺激 (IR ₅₀ IR ₂₂₅ ) 之后，从花岗岩鹅卵石的岩石切片中分离出以石英为主的 OSL 信号，以进行埋藏测年。_{pIR 50} IR ₂₂₅ PGLSL ₂₅信号的刺激曲线衰减特征、特征饱和剂量和热稳定性表明该信号以石英为主，但仍不是快分量为主。我们通过剂量恢复实验初步验证了等效剂量 (D _e ) 测量方案。发光深度曲线显示 pIR ₅₀ IR ₂₂₅ PGLSL _{25的漂白深度}信号略小于或接近 IR ₅₀信号，而 pIR ₅₀ IR ₂₂₅信号则要浅得多。pIR ₅₀ IR ₂₂₅ PGLSL ₂₅程序可以在一次测量中从长石和石英的发光信号中确定多个_De值，具有不同的漂白能力和稳定性，这有可能用于鹅卵石的埋藏年龄测年。