globalchange  > 气候减缓与适应
DOI: 10.1016/j.quageo.2018.03.013
WOS记录号: WOS:000454376300014
论文题名:
Establishing a high-resolution luminescence chronology for the Zhenbeitai sand-loess section at Yulin, North-Central China
作者: Wu, Jiang; Lu, Huayu; Yi, Shuangwen; Xu, Zhiwei; Gu, Yao; Liang, Chenghong; Cui, Mengchun; Sun, Xuefeng
通讯作者: Lu, Huayu
刊名: QUATERNARY GEOCHRONOLOGY
ISSN: 1871-1014
EISSN: 1878-0350
出版年: 2019
卷: 49, 页码:78-84
语种: 英语
英文关键词: Sand-loess sequence ; Quartz SAR OSL ; K-feldspar post-IR IRSL ; Last interglacial period ; Depositional hiatus ; North-Central China
WOS关键词: MU US DESERT ; OPTICALLY STIMULATED LUMINESCENCE ; SINGLE-ALIQUOT ; K-FELDSPAR ; QUARTZ ; SEDIMENTS ; DEPOSITS ; SITE ; PROTOCOL ; SIGNALS
WOS学科分类: Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向: Physical Geography ; Geology
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.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/129415
Appears in Collections:气候减缓与适应

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作者单位: Nanjing Univ, Jiangsu Collaborat Innovat Ctr Climate Change, Sch Geog & Ocean Sci, Nanjing 210023, Jiangsu, Peoples R China

Recommended Citation:
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]. QUATERNARY GEOCHRONOLOGY,2019-01-01,49:78-84
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