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DOI10.1016/j.quageo.2018.03.013
Establishing a high-resolution luminescence chronology for the Zhenbeitai sand-loess section at Yulin, North-Central China
Wu, Jiang; Lu, Huayu; Yi, Shuangwen; Xu, Zhiwei; Gu, Yao; Liang, Chenghong; Cui, Mengchun; Sun, Xuefeng
发表日期2019
ISSN1871-1014
EISSN1878-0350
卷号49页码:78-84
英文摘要

Sand-loess sequences in the desert-loess transition zone are sensitive terrestrial archives for recording past climatic changes and atmospheric dust activities. However, a high-resolution chronology for relative long-term sand-loess sequences is still rare. In this study, we used quartz SAR OSL and K-feldspar pIRIR (pIRIR(290)) methods to date a 16.8 m sand-loess sequence at Zhenbeitai in Yulin (North-Central China). The quartz is sensitive, fast component dominated but saturates at similar to 150 Gy. The measured K-feldspar pIRIR(290) D-e showed no dependency on the first IR stimulation temperature between 50 degrees C and 260 degrees C. Dose recovery results were consistent with unity up to similar to 800 Gy for a test dose of approximately 30% of the equivalent dose to be measured. The resulting pIRIR(290) ages are consistent with the stratigraphy up to similar to 121 ka. Thus, a high-resolution chronology up to the last interglacial could be established for the Zhenbeitai sand-loess section. Derived mass accumulation rates show sedimentation rates of similar to 10-80 cm/ka for the upper loess (< 10 ka) and similar to 15-30 cm/ka for the loess deposits between 57 and 111 ka. Interbedded sands (similar to 10-65 cm/ka) suggest active dunes in the Mu Us desert during similar to 17-10 ka. We found a depositional hiatus of loess between similar to 47 ka and 17 ka. The Zhenbeitai sand loess sequence provides a sensitive record of regional climatic changes in this semiarid zone since last interglacial period.


WOS研究方向Physical Geography ; Geology
来源期刊QUATERNARY GEOCHRONOLOGY
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/93086
作者单位Nanjing Univ, Jiangsu Collaborat Innovat Ctr Climate Change, Sch Geog & Ocean Sci, Nanjing 210023, Jiangsu, Peoples R China
推荐引用方式
GB/T 7714
Wu, Jiang,Lu, Huayu,Yi, Shuangwen,et al. Establishing a high-resolution luminescence chronology for the Zhenbeitai sand-loess section at Yulin, North-Central China[J],2019,49:78-84.
APA Wu, Jiang.,Lu, Huayu.,Yi, Shuangwen.,Xu, Zhiwei.,Gu, Yao.,...&Sun, Xuefeng.(2019).Establishing a high-resolution luminescence chronology for the Zhenbeitai sand-loess section at Yulin, North-Central China.QUATERNARY GEOCHRONOLOGY,49,78-84.
MLA Wu, Jiang,et al."Establishing a high-resolution luminescence chronology for the Zhenbeitai sand-loess section at Yulin, North-Central China".QUATERNARY GEOCHRONOLOGY 49(2019):78-84.
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