Geochemical composition of Tajikistan loess and its provenance implications
文献类型：期刊论文
| 作者 | Li, Jinchan5; Song, Yougui2; Li, Yue1,2,3; Chen, Xiuling5; Mamadjanov, Yunus4; Aminov, Jamshed4 |
| 刊名 | PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
 |
| 出版日期 | 2016-03-15 |
| 卷号 | 446期号:2016页码:186-194 |
| 关键词 | Tajikistan Loess Geochemical Elements Provenance |
| DOI | 10.1016/j.palaeo.2016.01.025 |
| 文献子类 | Article |
| 英文摘要 | The Tajikistan (TJ) loess has great significance for the study of Quaternary climate changes and dust source in Central Asia. In this paper, we investigate the geochemical composition and provenance of loess. Our results show that the major elements, in order from high to low average content, are SiO2 > Al2O3 > CaO > Fe2O3 > MgO > K2O > Na2O > TiO2 > P2O5 > MnO. Fe, Ti, P and Mn contents in loess are similar to those in the UCC, as is the case with Si, Al and Mg contents in paleosols. Ca is distinctly enriched in loess, and Si, Al and K are depleted. Na is depleted in both loess and paleosols, and P is depleted only in paleosols. In contrast to the UCC, paleosols show enrichments in all trace elements except for Ba, Sr and Zr, but in loess, some trace elements (e.g., Ba, Co, Ni and Zr) show depletion. The CIA value of TJ loess is lower than that of Kashmir loess, the latter being influenced by differences in the sorting and tectonic environment. There are no great changes about provenance during the formation of TJ loess, and the deposit areas have a shorter distance to the provenance. Geochemical data and atmospheric circulations demonstrate that the TJ loess was mainly transported by the near surface northerly or northwesterly winds, but there may be an additional and local source making a certain contribution to the formation of loess deposits in the south of Tianshan. (C) 2016 Elsevier B.V. All rights reserved. |
| WOS关键词 | CHEMICAL-WEATHERING HISTORY ; CENTRAL-ASIA ; CHINESE LOESS ; SOUTHERN TAJIKISTAN ; PALEOSOL SEQUENCE ; LAST GLACIATION ; HIMALAYA ; INDIA ; PLEISTOCENE ; EVOLUTION |
| WOS研究方向 | Physical Geography ; Geology ; Paleontology |
| 语种 | 英语 |
| WOS记录号 | WOS:000371553000017 |
| 源URL | [http://ir.ieecas.cn/handle/361006/5796]  |
| 专题 | 地球环境研究所_古环境研究室 |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecol & Environm Ctr Asia, Urumqi 830011, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, 97 Yanxiang Rd, Xian 710061, Peoples R China 3.Joint Ctr Global Change Studies, Beijing 100875, Peoples R China 4.Acad Sci Tajikistan, Inst Geol Earthquake Engn & Seismol, Dushanbe 734063, Tajikistan 5.Fujian Normal Univ, Sch Geog Sci, State Key Lab Breeding Base Humid Subtrop Mt Ecol, Fuzhou 350007, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Jinchan,Song, Yougui,Li, Yue,et al. Geochemical composition of Tajikistan loess and its provenance implications[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2016,446(2016):186-194. |
| APA | Li, Jinchan,Song, Yougui,Li, Yue,Chen, Xiuling,Mamadjanov, Yunus,&Aminov, Jamshed.(2016).Geochemical composition of Tajikistan loess and its provenance implications.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,446(2016),186-194. |
| MLA | Li, Jinchan,et al."Geochemical composition of Tajikistan loess and its provenance implications".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 446.2016(2016):186-194. |
入库方式： OAI收割
来源：地球环境研究所
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