A high-resolution quartz OSL chronology of the Talede loess over the past ∼30 ka and its implications for dust accumulation in the Ili Basin, Central Asia

摘要: Abstract Similar to the loess deposits on Chinese Loess Plateau (CLP), a reliable chronology plays also an important role in revisiting past climate and environment changes recorded by Central Asia. Previously, few luminescence 14C ages, mainly covering last glacial, were obtained for several sections Asia, which are often controversial. Until now, there is still lack of high-resolution chronologies late Pleistocene, especially Holocene. Here, fine-grained (4–11 μm) quartz single-aliquot regenerative-dose (SAR) optically stimulated (OSL) dating protocol used establish detailed uppermost part (∼5 m) Talede Ili Basin Conventional tests SAR general characteristics indicate that this suitable loess. Finally, 15 closely-spaced OSL ranging from 0.72 ± 0.05 28.9 ± 2.12 ka with no reversals, obtained. Consistent previous studies Basin, two three ages show discrepancy when compared section. The constructed reveals dust accumulation rapid during marine isotope stage (MIS) 2, Last Glacial Maximum (LGM), continuous Holocene, rate exhibiting relatively low level increasing trend. Comparison at other sites indicates LGM not universal, slow Holocene probably true entire Basin. different grain sized Asian both consistency inconsistency, needs be further investigated.