Weathering histories of Chinese loess deposits based on uranium and thorium series nuclides and cosmogenic Be-10
文献类型：期刊论文
| 作者 | Gu, ZY; Lal, D; Liu, TS; Guo, ZT; Southon, J; Caffee, MW |
| 刊名 | GEOCHIMICA ET COSMOCHIMICA ACTA
 |
| 出版日期 | 1997-12-01 |
| 卷号 | 61期号:24页码:5221-5231 |
| ISSN号 | 0016-7037 |
| 文献子类 | Article |
| 英文摘要 | The long, continuous deposition of dust in the Chinese loess plateau (Liu et al., 1985; Kukia and An, 1989; Ding et al., 1991a) offers an unique opportunity to study the nature of soil weathering in a wide range of climatic conditions. In this paper we report on measurements of concentrations of U-and Th-series nuclides and of major cations in 150 loess and paleosol samples from five sites, going back 2.5 Ma. Using the results for Be-10 concentrations in these soils (Gu et al., 1996), we determined the absolute amounts of water added to several soil units and obtained: (1) first-order leaching constants for U and several cations and (2) the compositions of the soils contributing to the dust-source regions and of the dust at deposition. Further, based on analyses of Th-230 in soils deposited in the past ca. 140 ka, we determined when the soils weathered in the source regions. We conclude that most of the weathering in the dust-source regions may have occurred during the interglacials. Copyright (C) 1997 Elsevier Science Ltd. |
| WOS关键词 | MAGNETIC-SUSCEPTIBILITY ; CALIFORNIA ; RADIUM ; SOILS |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000071287900005 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/74908]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Gu, ZY |
| 作者单位 | 1.Scripps Inst Oceanog, Geosci Res Div, La Jolla, CA 92093 USA 2.Chinese Acad Sci, Inst Geol, Beijing, Peoples R China 3.Univ Calif Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94551 USA |
| 推荐引用方式 GB/T 7714 | Gu, ZY,Lal, D,Liu, TS,et al. Weathering histories of Chinese loess deposits based on uranium and thorium series nuclides and cosmogenic Be-10[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,1997,61(24):5221-5231. |
| APA | Gu, ZY,Lal, D,Liu, TS,Guo, ZT,Southon, J,&Caffee, MW.(1997).Weathering histories of Chinese loess deposits based on uranium and thorium series nuclides and cosmogenic Be-10.GEOCHIMICA ET COSMOCHIMICA ACTA,61(24),5221-5231. |
| MLA | Gu, ZY,et al."Weathering histories of Chinese loess deposits based on uranium and thorium series nuclides and cosmogenic Be-10".GEOCHIMICA ET COSMOCHIMICA ACTA 61.24(1997):5221-5231. |
入库方式： OAI收割
来源：地质与地球物理研究所
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