KMS Institute of Vertebrate Paleontology and Paleoanthropology
| Late Quaternary loess accumulation at the Rudak section in Uzbekistan, central Asia: Chronology and palaeoclimate implications | |
| Zhang, Jingran1,2; Zhou, Xinying3; Long, Hao2,4 | |
| 2020-06-01 | |
| 发表期刊 | PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
 |
| ISSN | 0031-0182 |
| 卷号 | 547期号:0页码:11 |
| 摘要 | Many studies have been carried out to understand the nature of the loess formation and its palaeoenvironmental significance in different parts of Eurasia, especially Europe and China. However, in spite of its key position, our knowledge about the loess deposits at the core of the Eurasian loess belt in central Asia is still limited, particularly in terms of absolute dating. This study presents a new luminescence chronology of a loess-palaeosol sequence (Rudak section) in the vicinity of the Gissar Range, Uzbekistan, using both quartz optically stimulated luminescence dating and polymineral post-IR IRSL dating techniques. The dating results suggested a loess accumulation history over the past 180 kyr at Rudak section, characterized by a great depositional hiatus during the entire last glacial period, likely owing to too harsh climate conditions for favouring dust accretion and loess preservation in the piedmont areas of central Asia. Hence, contrasting with the traditional concept of continuous (quasi-continuous) deposition of loess, the direct stratigraphical correlation might be problematic for climatic interpretation of loess-palaeosol sequence in this area. Furthermore, magnetic susceptibility of Rudak section demonstrated the moisture peaks in phase with ice-volume minima over the glacial and interglacial cycles, indicating moisture variation in the Westerlies-dominated central Asia was broadly consistent with that in monsoonal Asia on orbital timescales, but nearly contrasting picture with each other on the suborbital timescales, at least through the Holocene epoch. The Westerlies-dominated central Asia has generally experienced a dry first half and a wet second half of the Holocene, which has likely been driven by solar insolation gradients between mid-latitudes and high-latitudes as well as the melt-water flux. |
| 关键词 | Dust accumulation Luminescence dating Sedimentary hiatus Moisture variations Westerlies |
| DOI | 10.1016/j.palaeo.2020.109695 |
| 关键词[WOS] | ARID CENTRAL-ASIA ; HOLOCENE MOISTURE EVOLUTION ; CHINESE LOESS ; PALEOSOL SEQUENCE ; LATE PLEISTOCENE ; HIGH-RESOLUTION ; ILI BASIN ; MAGNETIC-PROPERTIES ; NORTHERN CHINA ; TIAN-SHAN |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | Strategic Priority Research Program of Chinese Academy of Sciences[XDB26000000] ; Youth Innovation Promotion Association CAS ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB40010200] ; National Natural Science Foundation of China[41701002] ; National Natural Science Foundation of China[41977381] |
| WOS研究方向 | Physical Geography ; Geology ; Paleontology |
| WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology |
| WOS记录号 | WOS:000528206600010 |
| 出版者 | ELSEVIER |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.205/handle/311034/17398 |
| 专题 | 中科院古脊椎所（2000年以后） |
| 通讯作者 | Long, Hao |
| 作者单位 | 1.Nanjing Normal Univ, Jiangsu Ctr Collaborat Innovat Geog Informat Reso, Sch Geog, Key Lab Virtual Geog Environm, Nanjing 210023, Peoples R China 2.Chinese Acad Sci NIGLAS, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing 210008, Peoples R China 3.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China 4.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Jingran,Zhou, Xinying,Long, Hao. Late Quaternary loess accumulation at the Rudak section in Uzbekistan, central Asia: Chronology and palaeoclimate implications[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2020,547(0):11. |
| APA | Zhang, Jingran,Zhou, Xinying,&Long, Hao.(2020).Late Quaternary loess accumulation at the Rudak section in Uzbekistan, central Asia: Chronology and palaeoclimate implications.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,547(0),11. |
| MLA | Zhang, Jingran,et al."Late Quaternary loess accumulation at the Rudak section in Uzbekistan, central Asia: Chronology and palaeoclimate implications".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 547.0(2020):11. |
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