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  4. 中国科学院新生代地质与环境重点实验室
Loess deposits in southern Tajikistan (Central Asia): Magnetic properties and paleoclimate

文献类型：期刊论文

作者Parviz, Nazarov2,3,4,6; Shen, Zhongshan4,5; Yunus, Mamadjanov1; Zulqarnain, Sajid6
刊名QUATERNARY GEOCHRONOLOGY
出版日期2020-10-01
卷号60页码:12
关键词Loess Paleomagnetism Pleistocene Paleoclimate Tajikistan Central Asia
ISSN号1871-1014
DOI10.1016/j.quageo.2020.101114
英文摘要The continental accumulation of dust during the Quaternary led to the formation of widespread loess deposits in southern Tajikistan. In this area, the accumulation of loess is commonly associated with the occurrence of dust storms and the widespread distribution of loess provides evidence of dust storms becoming more frequent in arid Central Asia at least since the Early Pleistocene. Southern Tajikistan represents one of the largest loess deposits in Central Asia. We conducted a thorough study on the magnetostratigraphy, grain size, and magnetic susceptibility of the Chashmanigar section to reconstruct the stratigraphy of loess deposits and paleoclimate of Tajikistan. Based on our new data, the lower boundary of the basal ages of the Olduvai and Reunion subchmns were established for the studied Chashmanigar section. Rock magnetic analyses showed that the predominant fernmagnetic minerals are large pseudo-single domain grains of magnetite, including limited maghemite. Standard demagnetization techniques yielded a characteristic component of natural remanent magnetization, which was used to obtain a well-defined magnetostratigraphy. In southern Tajikistan, paleosols consistently exhibit finer grain size distribution and higher magnetic susceptibility than loess horizons, suggesting that the environment of the Chashmanigar section was colder, drier, and dustier during glacial periods than during interglacial periods. Through correlation with astronomically tuned oxygen isotope records, sophisticated dating of the loess-paleosol sequence at Chashmanigar could be achieved, and the global significance of the recorded paleoclimatic variations could be revealed. The resulting grain size, magnetic susceptibility, and correlation with astronomically tuned oxygen isotope clearly provide information about the climatic pattern during the Early Pleistocene.
WOS关键词CHINESE LOESS ; GRAIN-SIZE ; NORTHERN CHINA ; ROCK MAGNETISM ; TIME-SCALE ; DEEP-SEA ; PLEISTOCENE ; HISTORY ; CLIMATE ; RECORD
资助项目National Natural Science Foundation of China[41725010] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB26000000] ; Key Research Program of the Institute of Geology and Geophysics, CAS[IGGCAS-201905] ; "CAS-TWAS President Fellowship Program" of the Chinese Academy of Sciences
WOS研究方向Physical Geography ; Geology
语种英语
WOS记录号WOS:000571010900002
出版者ELSEVIER SCI LTD
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; "CAS-TWAS President Fellowship Program" of the Chinese Academy of Sciences ; "CAS-TWAS President Fellowship Program" of the Chinese Academy of Sciences ; "CAS-TWAS President Fellowship Program" of the Chinese Academy of Sciences ; "CAS-TWAS President Fellowship Program" of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; "CAS-TWAS President Fellowship Program" of the Chinese Academy of Sciences ; "CAS-TWAS President Fellowship Program" of the Chinese Academy of Sciences ; "CAS-TWAS President Fellowship Program" of the Chinese Academy of Sciences ; "CAS-TWAS President Fellowship Program" of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; "CAS-TWAS President Fellowship Program" of the Chinese Academy of Sciences ; "CAS-TWAS President Fellowship Program" of the Chinese Academy of Sciences ; "CAS-TWAS President Fellowship Program" of the Chinese Academy of Sciences ; "CAS-TWAS President Fellowship Program" of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; "CAS-TWAS President Fellowship Program" of the Chinese Academy of Sciences ; "CAS-TWAS President Fellowship Program" of the Chinese Academy of Sciences ; "CAS-TWAS President Fellowship Program" of the Chinese Academy of Sciences ; "CAS-TWAS President Fellowship Program" of the Chinese Academy of Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/98265]  
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
地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Parviz, Nazarov
作者单位1.Acad Sci Republ Tajikis, Inst Geol Earthquake Engn & Seismol, Dushanbe 734063, Tajikistan
2.CAS Ctr Excellence Life & Paleoenvironm, Beijing 100044, Peoples R China
3.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100049, Peoples R China
6.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Parviz, Nazarov,Shen, Zhongshan,Yunus, Mamadjanov,et al. Loess deposits in southern Tajikistan (Central Asia): Magnetic properties and paleoclimate[J]. QUATERNARY GEOCHRONOLOGY,2020,60:12.
APA Parviz, Nazarov,Shen, Zhongshan,Yunus, Mamadjanov,&Zulqarnain, Sajid.(2020).Loess deposits in southern Tajikistan (Central Asia): Magnetic properties and paleoclimate.QUATERNARY GEOCHRONOLOGY,60,12.
MLA Parviz, Nazarov,et al."Loess deposits in southern Tajikistan (Central Asia): Magnetic properties and paleoclimate".QUATERNARY GEOCHRONOLOGY 60(2020):12.

入库方式： OAI收割

来源：地质与地球物理研究所

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