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| 莱洲湾南岸咸水入侵区晚更新世以来的古环境演变 | |
| 引用本文： | 张祖陆,刘恩峰,张艳,辛良杰.莱洲湾南岸咸水入侵区晚更新世以来的古环境演变[J].地理学报(英文版),2008,18(1):37-45. |
| 作者姓名： | 张祖陆 刘恩峰 张艳 辛良杰 |
| 作者单位： | [1]Geography Department of Shandong Normal University, Jinan 250014, China [2]Nanjing Institute of Geography ＆ Limnology, CAS, Nanjing 210008, China [3]Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China |
| 基金项目： | National Natural Science Foundation of China, No.40471122 |
| 摘 要： | The south coastal plain of Laizhou Bay is one of the typical salt-water intrusion areas in China, the occurrence and development of which was closely related with the palaeoenvironment evolution. Systematic analyses of pollen, foraminifera and grain size composition based on ^14C and luminescence dating from two sediment cores were performed for the purpose of understanding the salt-water intrusion in the coastal plain of Laizhou Bay from the perspective of environmental evolution since late Pleistocene. It could be classified into seven evolution stages since 120 kaBP： 120-85 kaBP was a transition period from cold to warm; 85-76 kaBP was a period with warm and wet climate having swamp lakes developed in the lower reaches of the Weihe River, south coastal plain of Laizhou Bay; 76-50 kaBP was characterized by grassland vegetation and coarse sediments in terrestrial environment, which was the early stage of Dali Ice-Age; 50-24 kaBP was a period with alternate sea deposition in the south coastal plain of Laizhou Bay; 24-10 kaBP was the late stage of Dali Ice-Age with coldest period of Quaternary, the south coastal plain of Laizhou Bay was dry grassland and loess deposition environment; 10-4 kaBP was another warm and wet climate period, sea level was high and regressed at 4 kaBP; and has been the modern sedimentary environment since 4 kaBP. Among the three warm stages, including 85-76 kaBP, 50-24 kaBP and 10-4 kaBP, corresponded to late Yangkou, Guangrao and Kenli seawater transgression respectively. The duration of the latter one in south coastal plain of Laizhou Bay was longer than that in west coast of Bohai Sea and east coast of Laizhou Bay. The three periods of seawater transgression formed the foundation of salt-water intrusion in this area. |
| 关 键 词： | 莱洲湾南岸 咸水入侵区 晚更新世 古环境演变 |
| 收稿时间： | 2007-06-29 |
| 修稿时间： | 2007-09-15 |
Environmental evolution in the salt-water intrusion area south of Laizhou Bay since late Pleistocene |
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| Zulu?Zhang,Enfeng?Liu,Yan?Zhang,Liangjie?Xin.Environmental evolution in the salt-water intrusion area south of Laizhou Bay since late Pleistocene[J].Journal of Geographical Sciences,2008,18(1):37-45. | |
| Authors: | Zulu Zhang Enfeng Liu Yan Zhang Liangjie Xin |
| Institution: | 1. Geography Department of Shandong Normal University, Jinan 250014, China 2. Nanjing Institute of Geography & Limnology, CAS, Nanjing 210008, China 3. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China |
| Abstract: | The south coastal plain of Laizhou Bay is one of the typical salt-water intrusion areas in China, the occurrence and development of which was closely related with the palaeoenvironment evolution. Systematic analyses of pollen, foraminifera and grain size com-position based on 14C and luminescence dating from two sediment cores were performed for the purpose of understanding the salt-water intrusion in the coastal plain of Laizhou Bay from the perspective of environmental evolution since late Pleistocene. It could be classified into seven evolution stages since 120 kaBP: 120-85 kaBP was a transition period from cold to warm; 85-76 kaBP was a period with warm and wet climate having swamp lakes developed in the lower reaches of the Weihe River, south coastal plain of Laizhou Bay; 76-50 kaBP was characterized by grassland vegetation and coarse sediments in terrestrial environment, which was the early stage of Dali Ice-Age; 50-24 kaBP was a period with alternate sea deposition in the south coastal plain of Laizhou Bay; 24-10 kaBP was the late stage of Dali Ice-Age with coldest period of Quaternary, the south coastal plain of Laizhou Bay was dry grassland and loess deposition environment; 10-4 kaBP was another warm and wet climate period, sea level was high and regressed at 4 kaBP; and has been the modern sedimentary environment since 4 kaBP. Among the three warm stages, including 85-76 kaBP, 50-24 kaBP and 10-4 kaBP, corresponded to late Yangkou, Guangrao and Kenli seawater transgression respectively. The duration of the latter one in south coastal plain of Laizhou Bay was longer than that in west coast of Bohai Sea and east coast of Laizhou Bay. The three periods of seawater transgression formed the foundation of salt-water intrusion in this area. Foundation: National Natural Science Foundation of China, No.40471122 Author: Zhang Zulu (1949–), Professor, specialized in environmental geoscience and environmental change. |
| Keywords: | environmental evolution salt-water intrusion late Pleistocene south coastal plain of Laizhou Bay China |
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