Environmental magnetic studies of sediment cores from Gonghai Lake: implications for monsoon evolution in North China during the late glacial and Holocene
文献类型：期刊论文
| 作者 | Chen, Fahu1; Liu, Jianbao1; Xu, Qinghai2; Li, Yuecong2; Chen, Jianhui1; Wei, Haitao1; Liu, Qingsong3; Wang, Zongli1; Cao, Xianyong2; Zhang, Shengrui2 |
| 刊名 | JOURNAL OF PALEOLIMNOLOGY
 |
| 出版日期 | 2013-03-01 |
| 卷号 | 49期号:3页码:447-464 |
| 关键词 | Last deglaciation Holocene Lake sediment Northern China Magnetic parameters Monsoon history |
| ISSN号 | 0921-2728 |
| DOI | 10.1007/s10933-012-9677-3 |
| 文献子类 | Article |
| 英文摘要 | Environmental magnetic studies were conducted on a 9.42-m-long sediment core from Gonghai Lake, North China. Radiocarbon dating indicates that the record spans the last 15,000 cal year BP. The principal magnetic mineral in the sediments is pseudo-single domain magnetite of detrital origin with minimal post-depositional alteration. Although the variations in the concentration of detrital magnetic minerals and their grain size throughout the core reflect inputs from both soil erosion and eolian dust, it is shown that their climatic and environmental significance changes with time. In the lowermost part of the core, similar to 15,000-11,500 cal year BP, the magnetic minerals were supplied mainly by bedrock erosion, soil erosion and dust input when climate ameliorated after the cold and dusty last glacial maximum. The increasing magnetic susceptibility (v) in this interval may indicate a combination of changes in the lake environment together with catchment-surface stabilization and a decreasing proportion of dust input. In the central part of the core, similar to 11,500-1,000 cal year BP, the detrital magnetic minerals mainly originated from dust inputs from outside the catchment when the lake catchment was covered by forest, and catchment-derived sediment supply (and thus the lake sediment accumulation rate) were minimal. The generally low concentration of magnetic minerals in this part of the core reflects the highest degree of soil stability and the strongest summer monsoon during the Holocene. In the uppermost part of the core, the last similar to 1,000 years, detrital magnetic minerals mainly originated from erosion of catchment soils when the vegetation cover was sparse and the sediment accumulation rates were high. Within this part of the core the high magnetic susceptibility reflects strong pedogenesis in the lake catchment, and thus a strong summer monsoon. This scenario is similar to that recorded in loess profiles. Overall, the results document three main stages of summer monsoon history with abrupt shifts from one stage to another: an increasing and variable summer monsoon during the last deglacial, a generally strong summer monsoon in the early and middle Holocene and a weak summer monsoon in the late Holocene. The results also suggest that different interpretational models may need to be applied to lake sediment magnetic mineral assemblages corresponding to different stages of environmental evolution. |
| WOS关键词 | ASIAN MONSOON ; HIGH-RESOLUTION ; BACTERIAL MAGNETITE ; HEMIPELAGIC SEDIMENTS ; HYSTERESIS PROPERTIES ; PALEOCLIMATIC RECORD ; LACUSTRINE SEDIMENTS ; MILLENNIAL-SCALE ; LATE PLEISTOCENE ; CLIMATIC CHANGES |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Marine & Freshwater Biology |
| 语种 | 英语 |
| WOS记录号 | WOS:000316886900010 |
| 出版者 | SPRINGER |
| 资助机构 | National Basic Research Program of China(2010CB950202) ; National Basic Research Program of China(2010CB950202) ; National Natural Science Foundation of China(40971056 ; National Natural Science Foundation of China(40971056 ; 111 Project(B06026) ; 111 Project(B06026) ; 41130102 ; 41130102 ; 41025013) ; 41025013) ; National Basic Research Program of China(2010CB950202) ; National Basic Research Program of China(2010CB950202) ; National Natural Science Foundation of China(40971056 ; National Natural Science Foundation of China(40971056 ; 111 Project(B06026) ; 111 Project(B06026) ; 41130102 ; 41130102 ; 41025013) ; 41025013) ; National Basic Research Program of China(2010CB950202) ; National Basic Research Program of China(2010CB950202) ; National Natural Science Foundation of China(40971056 ; National Natural Science Foundation of China(40971056 ; 111 Project(B06026) ; 111 Project(B06026) ; 41130102 ; 41130102 ; 41025013) ; 41025013) ; National Basic Research Program of China(2010CB950202) ; National Basic Research Program of China(2010CB950202) ; National Natural Science Foundation of China(40971056 ; National Natural Science Foundation of China(40971056 ; 111 Project(B06026) ; 111 Project(B06026) ; 41130102 ; 41130102 ; 41025013) ; 41025013) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/86722]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Chen, Fahu |
| 作者单位 | 1.Lanzhou Univ, MOE Key Lab West Chinas Environm Syst, Lanzhou 730000, Peoples R China 2.Hebei Normal Univ, Coll Resources & Environm, Shijiazhuang 050016, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Fahu,Liu, Jianbao,Xu, Qinghai,et al. Environmental magnetic studies of sediment cores from Gonghai Lake: implications for monsoon evolution in North China during the late glacial and Holocene[J]. JOURNAL OF PALEOLIMNOLOGY,2013,49(3):447-464. |
| APA | Chen, Fahu.,Liu, Jianbao.,Xu, Qinghai.,Li, Yuecong.,Chen, Jianhui.,...&Zhang, Shengrui.(2013).Environmental magnetic studies of sediment cores from Gonghai Lake: implications for monsoon evolution in North China during the late glacial and Holocene.JOURNAL OF PALEOLIMNOLOGY,49(3),447-464. |
| MLA | Chen, Fahu,et al."Environmental magnetic studies of sediment cores from Gonghai Lake: implications for monsoon evolution in North China during the late glacial and Holocene".JOURNAL OF PALEOLIMNOLOGY 49.3(2013):447-464. |
入库方式： OAI收割
来源：地质与地球物理研究所
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