Synchronous Formation and Consistent Provenance Across Different Particle Sizes in Loess Deposits on the Chinese Loess Plateau
文献类型：期刊论文
| 作者 | Li, Le1,4,5; Li, Gen K.3; Li, Tao2; Li, Gaojun5 |
| 刊名 | GEOPHYSICAL RESEARCH LETTERS
 |
| 出版日期 | 2025-08-12 |
| 卷号 | 52期号:16页码:10 |
| 关键词 | Chinese Loess Plateau uranium isotope silt production provenance paleoclimate |
| ISSN号 | 0094-8276 |
| DOI | 10.1029/2025GL115748 |
| 通讯作者 | Li, Le(lile@qdio.ac.cn) |
| 英文摘要 | Loess deposits on the Chinese Loess Plateau (CLP) serve as key terrestrial archives of late-Cenozoic paleoclimate. However, the formation timing and origin of different-size fractions remain unclear. This study applies the (234U/238U) activity ratio to seven silt-size fractions (2-63 mu m) from the CLP loess to estimate the pre-deposition transport time and infer loess provenance. All fractions show a consistent decrease in (234U/238U) with depositional time, aligning well with uranium-comminution-age-model predictions. Results yield a relatively uniform transport time of similar to 222 +/- 25 kyr across all sizes, suggesting near-synchronous production of loess materials through mountainous processes. This timescale closely matches the transport duration of silts from the Alxa arid lands (AALs), suggesting that AALs likely served as the primary transit hub for silt-sized materials where they get mixed and collectively delivered to the CLP. These findings shed new light on loess transport dynamics and provide crucial constraints for interpreting CLP-based paleoclimate records. |
| WOS关键词 | TIBETAN PLATEAU ; NORTHERN CHINA ; DUST ; DESERT ; ND |
| 资助项目 | National Natural Science Foundation of China ; Taishan Scholar Program of Shandong[tsqn202408275] ; Natural Science Foundation of Shandong Province[ZR2024QD106] ; [42325302] ; [42473067] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001547591200001 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/202716]  |
| 专题 | 海洋研究所_海洋环流与波动重点实验室 |
| 通讯作者 | Li, Le |
| 作者单位 | 1.Qingdao Marine Sci & Technol Ctr, Lab Marine Geol, Qingdao, Peoples R China 2.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing, Peoples R China 3.Univ Calif Santa Barbara, Dept Earth Sci, Santa Barbara, CA USA 4.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Key Lab Ocean Observat & Forecasting, Qingdao, Peoples R China 5.Nanjing Univ, Frontiers Sci Ctr Crit Earth Mat Cycling, MOE, Key Lab Surficial Geochem, Nanjing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Le,Li, Gen K.,Li, Tao,et al. Synchronous Formation and Consistent Provenance Across Different Particle Sizes in Loess Deposits on the Chinese Loess Plateau[J]. GEOPHYSICAL RESEARCH LETTERS,2025,52(16):10. |
| APA | Li, Le,Li, Gen K.,Li, Tao,&Li, Gaojun.(2025).Synchronous Formation and Consistent Provenance Across Different Particle Sizes in Loess Deposits on the Chinese Loess Plateau.GEOPHYSICAL RESEARCH LETTERS,52(16),10. |
| MLA | Li, Le,et al."Synchronous Formation and Consistent Provenance Across Different Particle Sizes in Loess Deposits on the Chinese Loess Plateau".GEOPHYSICAL RESEARCH LETTERS 52.16(2025):10. |
入库方式： OAI收割
来源：海洋研究所
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