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Loess deposits in the Tajik Basin, Central Asia: chronology, provenance and palaeoclimatic implications since the Last Glacial

文献类型：期刊论文

作者Tian, Shengchen1,2; Sun, Jimin1,2,4; Zhang, Zhiliang2; Abdulov, Sherzod1,2,3; Cao, Mengmeng1,2; Gadoev, Mustafo3; Oimahmadov, Ilhomjon3
刊名BOREAS
出版日期2020-10-27
页码20
ISSN号0300-9483
DOI10.1111/bor.12467
英文摘要The thick loess deposits in Tajikistan are important archives for palaeoclimatic reconstruction in Central Asia during the Quaternary. To date however, adequate high-resolution studies of chronology and climatic evolution of the Tajik loess have still not been carried out. In this paper, chronology, dust provenance, and palaeoclimatic significance of a loess section in the centre of the Tajik Basin has been studied. Optically stimulated luminescence (OSL) dating yields ages ranging from similar to 60.8 to 0.8 ka, indicating that this loess section accumulated during the Last Glacial period and the Holocene. The provenance of the Tajik loess includes dust transported by westerly winds from the upwind deserts in Turkmenistan, and minor proximal particles derived from alluvial sediments of the nearby mountains and fluvial/glacifluvial deposits on the river flood-plains. Multiple palaeoclimatic proxies including colour, particle size, environmental magnetic parameters, and element concentrations together with their correlation with the deep-sea delta O-18 record suggest that the Tajik loess accumulated during cold and dry stadial periods, while palaeosols formed during warm and moist interglacials or interstadials, which is similar to the Chinese Loess Plateau. Although the two regions have different dust provenances and wind systems, such similarity indicates that the palaeoclimatic variations in both regions might be forced by a common global factor, e.g. the global ice volume. Variations in global ice volume influenced the climate in Tajikistan and the Loess Plateau through affecting the westerlies and the East Asian Monsoon, respectively.
WOS关键词ARID CENTRAL-ASIA ; CHEMICAL-WEATHERING HISTORY ; CHINESE LOESS ; GRAIN-SIZE ; PALEOSOL SEQUENCE ; MAGNETIC-SUSCEPTIBILITY ; QUATERNARY CLIMATE ; LATE-PLEISTOCENE ; SOUTHERN TAJIKISTAN ; MOISTURE EVOLUTION
资助项目Strategic Priority Research Program of Chinese Academy of Sciences[XDA20070202] ; National Nature Science Foundation of China[41888101] ; National Nature Science Foundation of China[41672168]
WOS研究方向Physical Geography ; Geology
语种英语
WOS记录号WOS:000582543800001
出版者WILEY
资助机构Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Nature Science Foundation of China ; National Nature Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/98218]  
专题地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者Sun, Jimin
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Key Lab Cenozo Geol & Environm, Inst Geol & Geophys, Beijing 100029, Peoples R China
3.Acad Sci, Inst Geol Earthquake Engn & Seismol, Aijni Str 267, Dushanbe 734063, Tajikistan
4.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
推荐引用方式
GB/T 7714		 Tian, Shengchen,Sun, Jimin,Zhang, Zhiliang,et al. Loess deposits in the Tajik Basin, Central Asia: chronology, provenance and palaeoclimatic implications since the Last Glacial[J]. BOREAS,2020:20.
APA Tian, Shengchen.,Sun, Jimin.,Zhang, Zhiliang.,Abdulov, Sherzod.,Cao, Mengmeng.,...&Oimahmadov, Ilhomjon.(2020).Loess deposits in the Tajik Basin, Central Asia: chronology, provenance and palaeoclimatic implications since the Last Glacial.BOREAS,20.
MLA Tian, Shengchen,et al."Loess deposits in the Tajik Basin, Central Asia: chronology, provenance and palaeoclimatic implications since the Last Glacial".BOREAS (2020):20.

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来源：地质与地球物理研究所

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