| 浙东中新世Betula mioluminifera Hu et Chaney的发现及古气候重建 |
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| 引用本文： | 李明涛,孙柏年,肖良,任文秀,李相传,戴静.浙东中新世Betula mioluminifera Hu et Chaney的发现及古气候重建[J].地球科学进展,2008,23(6):651-658. |
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| 作者姓名： | 李明涛 孙柏年 肖良 任文秀 李相传 戴静 |
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| 作者单位： | 1. 兰州大学资源环境学院,甘肃,兰州,730000;现代古生物学与地层学国家重点实验室,中国科学院南京地质与古生物研究所,江苏,南京,210008
2. 兰州大学资源环境学院,甘肃,兰州,730000 |
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| 基金项目： | 国家自然科学基金
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中国科学院南京地质古生物研究所基金 |
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| 摘 要： | 随着古气候和古环境研究的日渐深入，“特有种气候分析法”成为新生代定量重建古气候研究的重要方法之一。使用这一方法分析了浙江东部天台中新统下南山组的古亮叶桦（Betula mioluminifera Hu et Chaney）压型化石，研究了其叶结构特征及表皮微细构造，定量推论浙江天台中新世时年平均温度为12.5～22.1℃，春季平均温度为13.0～23.1℃，较现在温暖。我国内蒙、吉林、山东、云南等地的新近系发现过古亮叶桦，分布的北界为42°N。其现存最近亲缘种亮叶桦（Betula luminifera）生活在101～119°E，23～34°N之间，海拔500～1800 m的山区，是我国特有树种。亮叶桦分布范围的缩小显示中新世一段时期我国气候逐渐变冷的趋势。
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| 关 键 词： | 中新世 古亮叶桦 特有种气候分析法 浙江 |
| 文章编号： | 1001-8166(2008)06-0651-08 |
| 收稿时间： | 2007-12-08 |
| 修稿时间： | 2007年12月8日 |
Discovery of Betula mioluminifera Hu et Chaney from the Miocene in Eastern Zhejiang and Reconstruction of Palaeoclimate |
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| LI Mingtao,SUN Bainian,XIAO Liang,REN Wenxiu,LI Xiangchuan,DAI Jing.Discovery of Betula mioluminifera Hu et Chaney from the Miocene in Eastern Zhejiang and Reconstruction of Palaeoclimate[J].Advance in Earth Sciences,2008,23(6):651-658. |
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| Authors: | LI Mingtao SUN Bainian XIAO Liang REN Wenxiu LI Xiangchuan DAI Jing |
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| Institution: | 1.College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000,China;2. State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China |
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| Abstract: | Along with the strengthening of the research of palaeoclimate and palaeoenvironment, the “climate analysis of endemic species” method has become one of efficient methods that can reconstruct palaeoclimate quantitatively. The compression of fossil Betula mioluminifera Hu et Chaney in the Xia' nanshan Formation of the Miocene in Tiantai, Zhejiang province, China, was analyzed by this method, and the leaf architecture and cuticular structure of the fossil were studied. The mean annual temperature 12.5～22.1℃ and the spring temperature 13.0～23.1℃ in the Miocene of Eastern Zhejiang were quantitatively reconstructed. As a result, the palaeoclimate of the Miocene was warmer than that of today. Fossil Betula mioluminifera had been found in the Neogene in Inner Mongolia, Jilin, Shandong and Yunnan Provinces in China, and the northern boundary of its natural distribution is 42°N. The living Betula luminifera is the nearest living relative species of fossil Betula mioluminifera and is also an endemic species in China. It grows from 500~1 800 m above sea level, within the geographic range from 101°E to 119°E and 23°N to 34°N. The decrease of distribution range of Betula luminifera shows a gradual cool climate trend gradually in some time of the Miocene. |
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| Keywords: | Miocene Betula mioluminifera Climate analysis of endemic species Zhejiang |
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