Variation of luminescence sensitivity of quartz grains from loess in eastern Tibetan Plateau and its provenance significance

The loess deposits widely distributed in the eastern Tibetan Plateau (ETP) are important archives for reconstructing paleoenvironmental changes and dust transportation history of Plateau. A lack sufficient investigations on source ETP has limited our understanding implications. Quartz luminescence sensitivity holds great potential tracing eolian sources. Numerous quartz have provided new insights into sources Chinese loess. However, studies its significance provenance scarce. In this work, we selected grains from different sites to investigate variation by testing 110°C thermoluminescence (TL) peak optically stimulated (OSL) sensitivities discussed implications based sensitivities. Our results show at locations were significantly ETP. values Machang (MC), Xiaojin (XJ), Wenchuan (WCH) sections much higher than those Xinshi (XS) Zhouqu (ZQ) sections. TL peaks OSL paleosol layers distinct differences. mainly influenced that identifying