The loess record in southern Tajikistan and correlation with Chinese loess
文献类型：期刊论文
| 作者 | Ding, ZL; Ranov, V; Yang, SL; Finaev, A; Han, JM; Wang, GA |
| 刊名 | EARTH AND PLANETARY SCIENCE LETTERS
 |
| 出版日期 | 2002-06-30 |
| 卷号 | 200期号:3-4页码:387-400 |
| 关键词 | Central Asia loess eccentricity orbital forcing climate change Pleistocene paleoclimatology |
| ISSN号 | 0012-821X |
| 文献子类 | Article |
| 英文摘要 | In the present study, the Chashmanigar loess-soil sequence in southern Tajikistan is studied; this loess section has a paleomagnetic basal age of about 1.77 Myr. Magnetic susceptibility, color reflectance and grain size were systematically measured for closely spaced samples from the section. Paleosols consistently have a finer grain size distribution, higher magnetic susceptibility, redder color reflectance and lower dust sedimentation rate than loess horizons, suggesting a colder, drier and dustier environment during glacial periods than in interglacial periods. The grain size record was tuned to variations in obliquity and precession of the Earth's orbit. The resulting magnetic susceptibility, grain size and color reflectance time series all show well-expressed astronomical periodicities during the Pleistocene. The mid-Pleistocene climate transition, characterized by a shift of dominant climatic periods from 41 kyr to 100 kyr at about 1.0-0.8 Myr, is clearly documented in these proxy records. Comparison of the Chashmanigar loess record with the Lingtai loess section in China and the ODP site 677 delta(18)O record shows that during the entire Pleistocene, the climate cycles recorded by the Central Asian loess can be well correlated to the Chinese loess and deep-sea oxygen isotope records. It is suggested that alternations of loess and soil horizons both in Central Asia and China could be basically forced by global ice volume variations, although different wind systems have controlled the Pleistocene loess transport and sedimentation in the two areas. (C) 2002 Elsevier Science B.V. All rights reserved. |
| WOS关键词 | NORTH-CENTRAL CHINA ; EOLIAN DEPOSITION ; CLIMATE-CHANGE ; CENTRAL-ASIA ; DEEP-SEA ; PLATEAU ; STRATIGRAPHY ; HEMISPHERE ; TIMESCALE ; EVOLUTION |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000176374300011 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/77399]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Ding, ZL |
| 作者单位 | 1.CAS, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Tajik Acad Sci, Inst Geol, Dushanbe 734025, Tajikistan 3.Tajik Acad Sci, Inst Hist Archaeol & Ethnog, Dushanbe 734025, Tajikistan |
| 推荐引用方式 GB/T 7714 | Ding, ZL,Ranov, V,Yang, SL,et al. The loess record in southern Tajikistan and correlation with Chinese loess[J]. EARTH AND PLANETARY SCIENCE LETTERS,2002,200(3-4):387-400. |
| APA | Ding, ZL,Ranov, V,Yang, SL,Finaev, A,Han, JM,&Wang, GA.(2002).The loess record in southern Tajikistan and correlation with Chinese loess.EARTH AND PLANETARY SCIENCE LETTERS,200(3-4),387-400. |
| MLA | Ding, ZL,et al."The loess record in southern Tajikistan and correlation with Chinese loess".EARTH AND PLANETARY SCIENCE LETTERS 200.3-4(2002):387-400. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。