| 长江三角洲地区晚更新世晚期的孢粉特征及古环境 |
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| 引用本文： | 张玉兰.长江三角洲地区晚更新世晚期的孢粉特征及古环境[J].同济大学学报(自然科学版),2005,33(9):1201-1205. |
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| 作者姓名： | 张玉兰 |
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| 作者单位： | 同济大学,海洋与地球科学学院,上海,200092 |
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| 基金项目： | 国家自然科学基金资助项目（40276021,40146024）;国家海洋局海底科学重点实验室基金资助项目（2003-1）;华东师范大学河口海岸重点实验室基金资助项目（200501） |
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| 摘 要： | 通过对长江三角洲地区晚第四纪沉积10多口钻井的孢粉、藻类资料分析研究，在以往较少见到化石的晚更新世晚期的硬粘土沉积中找到了能明确指示古环境的孢粉、藻类化石，发现了两种不同的孢粉组合，一种是以环纹藻Concentricystes占优势的孢粉组合，另一种是以陆生植物Pinus-Cupressaceae-Picea-Abies-Quercus（deciduous）-Grarnineae占优势的孢粉组合，证实了该层硬粘土形成期间曾经历滞水和水退的环境交替．也为探讨硬粘土成因、沉积环境提供了可靠的生物化石依据．
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| 关 键 词： | 长江三角洲 晚更新世 孢粉组合 |
| 文章编号： | 0253-374X（2005）09-1201-05 |
| 收稿时间： | 06 20 2005 12:00AM |
| 修稿时间： | 2005-06-20 |
Characteristics of Palynological Assemblage of Late Stage of Late Pleistocene in Changjiang River Delta Area and Paleoenvironment |
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| ZHANG Yu-lan.Characteristics of Palynological Assemblage of Late Stage of Late Pleistocene in Changjiang River Delta Area and Paleoenvironment[J].Journal of Tongji University(Natural Science),2005,33(9):1201-1205. |
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| Authors: | ZHANG Yu-lan |
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| Institution: | School of Ocean and Earth Science, Tongji University, Shanghai 200092, China |
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| Abstract: | The sporo-pollen and algae fossils indicating paleoenvironment were found in the hard clay of the pollen and algae from over ten holes in Changjiang River delta area,where hardly any fossil was found before.There are two different palynological assemblages.One is dominated by Concentricystes,another by Pinus-Cupressaceae-Picea-Abies-Quercus(deciduous)-Gramineae.All of them prove that the hard clay was formed during the advance of retreat of water,which supplied reliable fossil evidence for the origin of the hard clay and sediment and environment. |
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| Keywords: | Changjiang River delta Late Pleistocene palynological assemblage |
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