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100 _aWang, Leibin
_951930
245 _aOptical dating of Holocene paleosol development and climate changes in the Yili Basin, arid central Asia/
260 _bSage,
_c2019.
300 _aVol 29, issue 6, 2019 : (1068-1077 p.).
520 _aOptically stimulated luminescence (OSL) dating was conducted on the K-feldspar and quartz fractions of a Holocene loess-paleosol sequence in the Yili Basin, in the core area of arid central Asia (ACA). Age overestimation using the post-IR IR (pIR50IR170) signals from feldspar was observed for paleosols, because of poor bleaching prior to deposition. Therefore, a reliable age framework for the studied section was established using OSL dating of coarse-grained quartz, combined with a Bacon age model. A total of 18 OSL ages were obtained from a 2.5-m-loess/paleosol sequence with age range of 17.4–0.4 ka. Magnetic and grain-size proxies were used to reconstruct environmental changes during the studied interval, and the results indicate that paleosol development commenced at ~6 ka in the Yili Basin, which is consistent with previous studies in the Xinjiang region. Dust accumulation rates (DARs) and end-member analysis (EMA) of the grain-size frequency distributions were used to infer variations in the Westerlies during the Holocene, and the results suggest that the Westerlies were the main source of excess moisture in ACA during the studied interval.
650 _aArid central Asia,
_951931
650 _aK-feldspar pIRIR dating,
_951932
650 _a loess-paleosol sequence,
_951933
650 _a quartz optically stimulated luminescence dating
_951934
700 _aJia, Jia
_951935
700 _aZhao,Hui
_951834
700 _aLiu, Hao
_951936
700 _a Duan, Yanwu
_951937
700 _aXie, Haichao
_951938
700 _aZhang, David D
_951939
700 _aChen, Fahu
_951940
773 0 _012756
_916504
_dLondon: Sage Publication Ltd, 2019.
_tHolocene/
_x09596836
856 _uhttps://doi.org/10.1177/0959683619831432
942 _2ddc
_cART
999 _c12830
_d12830