Physical weathering of Gobi Desert sediments under different temperature and humidity conditions
文献类型：期刊论文
| 作者 | Wang, Xunming1,2; Zhu, Bingqi2; Wang, Zhenting3; Zhang, Caixia3; Geng, Xin2; Han, Likun2; Zheng, Yang2; Cai, Diwen2; Li, Danfeng2 |
| 刊名 | CATENA
 |
| 出版日期 | 2024 |
| 卷号 | 234页码:12 |
| ISSN号 | 0341-8162 |
| 关键词 | Physical weathering Temperature Moisture Grain size Gobi Desert |
| DOI | 10.1016/j.catena.2023.107597 |
| 通讯作者 | Li, Danfeng(lidf@igsnrr.ac.cn) |
| 英文摘要 | Physical weathering of the Gobi Desert surface sediments involves complex processes. However, our understanding of its main driving factors is still limited, and experimental observations on the weathering intensity of Gobi Desert surface sediments under changing environmental conditions are still insufficient. Surface samples were collected from the Gobi Desert, divided into 0.063-0.125 mm, 0.125-0.25 mm, 0.25-0.5 mm, 0.5-1 mm and 1-2 mm groups, and washed with deionized water. Physical weathering and salt weathering experiments of these groups were conducted under temperature (T) of -40 degrees C-40 degrees C and relative humidity (RH) of 20 %-100 %. Salt and mineral analyses, grain size distribution, and morphology analysis of each fraction group before and after the experiments were conducted. The results showed that mean grain sizes for the 0.063-0.125 mm, 0.125-0.25 mm, 0.25-0.5 mm, 0.5-1 mm, and 1-2 mm groups decreased by 0.49 +/- 1.09 %, -0.27 +/- 2.14 %, 0.41 +/- 3.14 %, 2.96 +/- 3.14 %, and 0.19 +/- 1.29 %, respectively. The mean size of each group decreased similar to 0.76 +/- 1.13 % /10 days, demonstrating a higher physical weathering intensity than the previous estimations. The d(0.1) size (i.e., the grain diameter for which 0.1 % of each grain group is smaller) was more sensitive to physical weathering, and the skewness was a good indicator of physical weathering for groups obeying a normal distribution. Physical weathering was still affected by salt weathering, and there was no regular pattern for physical weathering under variations in salt and mineral contents. At present, there are still difficulties in developing an accurate physical weathering intensity model. |
| WOS关键词 | CENTRAL NAMIB DESERT ; LABORATORY SIMULATION ; THERMAL-EXPANSION ; CARBONATE ROCKS ; SOIL PRODUCTION ; FREEZE-THAW ; MOISTURE ; RATES ; EVOLUTION ; PROPAGATION |
| 资助项目 | National Natural Science Foundation of China[41930640] ; Key Frontier Program of Chinese Academy of Sciences[QYZDJ-SSWDQC043] |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:001107941300001 |
| 资助机构 | National Natural Science Foundation of China ; Key Frontier Program of Chinese Academy of Sciences |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/200527]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Li, Danfeng |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 3.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Desert & Desertificat, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Xunming,Zhu, Bingqi,Wang, Zhenting,et al. Physical weathering of Gobi Desert sediments under different temperature and humidity conditions[J]. CATENA,2024,234:12. |
| APA | Wang, Xunming.,Zhu, Bingqi.,Wang, Zhenting.,Zhang, Caixia.,Geng, Xin.,...&Li, Danfeng.(2024).Physical weathering of Gobi Desert sediments under different temperature and humidity conditions.CATENA,234,12. |
| MLA | Wang, Xunming,et al."Physical weathering of Gobi Desert sediments under different temperature and humidity conditions".CATENA 234(2024):12. |
入库方式： OAI收割
来源：地理科学与资源研究所
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