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Palaeoclimatic and hydrological environments inferred by moisture indexes from the S-4 palaeosol section in the Xi'an region, China | |
Zhao, JB (Zhao, Jing-Bo)[ 1,2 ]; Ma, YD (Ma, Yan-Dong)[ 2,3 ]; Lui, R (Lui, Rui)[ 4 ]; Luo, XQ (Luo, Xiao-Qing)[ 1 ]; Shao, TJ (Shao, Tian-Jie)[ 1 ] | |
通讯作者 | Ma, Yan-Dong(mayandongemail@snnu.edu.cn) |
2018-11-10 | |
发表期刊 | QUATERNARY INTERNATIONAL |
ISSN | 1040-6182 |
卷号 | 493页码:127-136 |
文章类型 | 期刊论文 |
摘要 | We used indexes of soil moisture content to reconstruct water balance and vegetation type during the development of the palaeosol S4 of the loess-palaeosol sequence in the Xi'an area of China. Goethite–Fe-Mn concretions were found within S4 from field survey and laboratory analyses, and their presence is used as an indicator of soil moisture content and the depth distribution of groundwater. From a comparison of the goethite–Fe-Mn concretions, weathered-leached loess layer, and the vertical migration distance of CaCO3 between various sections in the Xi'an region, we infer a subtropical climate with annual average temperature 15–16 °C and annual average precipitation of 900–1000 mm during the development of S4. At that time, unlike today, the Qinling Mountains were not the boundary between subtropical and temperate climatic regions. Our results show that the depth distribution of soil gravitational water in the Xi'an region reached 3.3 m; the average soil moisture content within the 0–3.3 m depth range was ∼25%, after water consumption by evapotranspiration; and the soil moisture content within the goethite–Fe-Mn concretion layer was close to saturation, at ∼48%. Soil moisture was abundant and the water balance was positive and a large amount of moisture was supplied to the groundwater each year, which was conducive for the development of forest vegetation. |
关键词 | S4 Palaeosol Goethite–fe-mn Concretion Palaeo-moisture Content Indexes Palaeowater Circulation Water Balance |
DOI | 10.1016/j.quaint.2018.06.015 |
关键词[WOS] | LOESS PLATEAU ; MAGNETIC-SUSCEPTIBILITY ; NORTH-ATLANTIC ; NEW-ZEALAND ; SEQUENCE ; LUOCHUAN ; DEPOSITS ; BASIN ; IRON |
收录类别 | SCI |
语种 | 英语 |
资助项目 | Project of National Natural Science Foundation of China[41210002] ; Project of Xi'an Geological Survey Center of China Geological Survey[[2016]4] ; Project of State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences[SKLLQG1626] ; Project of State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences[SKLLQG1713] |
WOS研究方向 | Physical Geography ; Geology |
项目资助者 | Project of National Natural Science Foundation of China ; Project of Xi'an Geological Survey Center of China Geological Survey ; Project of State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences |
WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
WOS记录号 | WOS:000447489200013 |
出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ieecas.cn/handle/361006/9580 |
专题 | 黄土与第四纪地质国家重点实验室(2010~) |
通讯作者 | Ma, YD (Ma, Yan-Dong)[ 2,3 ] |
作者单位 | 1.School of Geography and Tourism, Shaanxi Normal University, Xi'an 710062, China; 2.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China; 3.Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region (Chang'an University), Ministry of Education, Xi'an 710054, China; 4.Department of Basic, Engineering University of PAP, Xi'an 710076, China |
推荐引用方式 GB/T 7714 | Zhao, JB ,Ma, YD ,Lui, R ,et al. Palaeoclimatic and hydrological environments inferred by moisture indexes from the S-4 palaeosol section in the Xi'an region, China[J]. QUATERNARY INTERNATIONAL,2018,493:127-136. |
APA | Zhao, JB ,Ma, YD ,Lui, R ,Luo, XQ ,&Shao, TJ .(2018).Palaeoclimatic and hydrological environments inferred by moisture indexes from the S-4 palaeosol section in the Xi'an region, China.QUATERNARY INTERNATIONAL,493,127-136. |
MLA | Zhao, JB ,et al."Palaeoclimatic and hydrological environments inferred by moisture indexes from the S-4 palaeosol section in the Xi'an region, China".QUATERNARY INTERNATIONAL 493(2018):127-136. |
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