Grain-size features of a Miocene loess-soil sequence at Qinan: Implications on its origin
文献类型：期刊论文
| 作者 | Qiao Yansong; Guo Zhengtang; Hao Qingzhen; Yin Qiuzhen; Yuan Baoyin; Liu Tungsheng |
| 刊名 | SCIENCE IN CHINA SERIES D-EARTH SCIENCES
 |
| 出版日期 | 2006-07-01 |
| 卷号 | 49期号:7页码:731-738 |
| 关键词 | Qinan Miocene Loess-soil Sequence Grain-size Eolian Origin |
| ISSN号 | 1006-9313 |
| DOI | 10.1007/s11430-006-0731-8 |
| 文献子类 | Article |
| 英文摘要 | In this study, grain-size of 507 bulk samples from the QA-I Miocene loess-soil sequence at Qinan were analyzed, and the grain-size features are compared with those of typical Quaternary loess and soil samples, representative lacustrine and fluvial samples. The results indicate that the grain-size distribution pattern of the Miocene loess is essentially similar to that of Quaternary loess, but greatly differs from the lacustrine and fluvial sediments. Loess layers are regularly coarser than soil layers, indicating cyclical climate changes. Median grain-size along the 253.1 m sequence varies from 6 to 13 mu m and the > 63 mu m fraction represents only 5.3% in maximum, 0.9% in average. Long-term grain-size variations are consistent with the loess accumulation rate at Qinan and with the eolian mass accumulation rate in the North Pacific. These features firmly indicate an eolian origin of the studied sequence, and also reveal a coeval changes between the long-term changes of eolian grain-size and continental aridity in the dust source regions. |
| WOS关键词 | RED-EARTH FORMATION ; PALEOCLIMATIC SIGNIFICANCE ; NORTHERN CHINA ; PLATEAU ; UPLIFT ; TIBET ; MAGNETOSTRATIGRAPHY ; DEPOSITS ; MONSOON ; CLIMATE |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000239944300006 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/66060]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Guo Zhengtang |
| 作者单位 | 1.Chinese Acad Sci, Inst Earth Environm, Xian 710075, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.Chinese Acad Geol Sci, Inst Geomech, Beijing 100081, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qiao Yansong,Guo Zhengtang,Hao Qingzhen,et al. Grain-size features of a Miocene loess-soil sequence at Qinan: Implications on its origin[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2006,49(7):731-738. |
| APA | Qiao Yansong,Guo Zhengtang,Hao Qingzhen,Yin Qiuzhen,Yuan Baoyin,&Liu Tungsheng.(2006).Grain-size features of a Miocene loess-soil sequence at Qinan: Implications on its origin.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,49(7),731-738. |
| MLA | Qiao Yansong,et al."Grain-size features of a Miocene loess-soil sequence at Qinan: Implications on its origin".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 49.7(2006):731-738. |
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。