کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7451711 | 1484125 | 2015 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Late Pleistocene and Holocene loess sedimentation in central and western Qilian Shan (China) revealed by OSL dating
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Late Pleistocene and Holocene loess sedimentation in central and western Qilian Shan (China) revealed by OSL dating Late Pleistocene and Holocene loess sedimentation in central and western Qilian Shan (China) revealed by OSL dating](/preview/png/7451711.png)
چکیده انگلیسی
The knowledge of loess accumulation in the central and western Qilian Shan was restricted to the time span since 13-11Â ka until present. Loess deposits prior to this period have not yet been reported. In this study 23 loess samples from the northern piedmont of central and western Qilian Shan area have been dated using fine-grained quartz optically stimulated luminescence (OSL) dating technique to set up a chronological framework for the loess sedimentation in this region. Our results demonstrate that the deposition of dust was widespread since the last deglaciation (â¼13Â ka) until â¼3.6Â ka in the northern piedmont of the central and western Qilian Shan area. Furthermore, the chronology of the loess sedimentation has been extended back at least to â¼81Â ka, which is remarkably older than previously thought. The existence of suitable environmental conditions (e.g. vegetation cover) for loess accumulation can be deduced in the central and western Qilian Shan for the Holocene and late Pleistocene. However, the loess sedimentation has been revealed to be discontinuous before â¼13Â ka as indicated by its episodic occurrence.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Quaternary International - Volume 372, 22 June 2015, Pages 120-129
Journal: Quaternary International - Volume 372, 22 June 2015, Pages 120-129
نویسندگان
Jingran Zhang, Veit Nottebaum, Sumiko Tsukamoto, Frank Lehmkuhl, Manfred Frechen,