| 甘肃窑街中侏罗世孢粉组合及其古环境意义 |
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| 引用本文： | 辛存林,孙柏年,韦利杰,肖良.甘肃窑街中侏罗世孢粉组合及其古环境意义[J].兰州大学学报(自然科学版),2006,42(3):8-13. |
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| 作者姓名： | 辛存林 孙柏年 韦利杰 肖良 |
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| 作者单位： | 1. 西北师范大学,地理与环境学院,甘肃,兰州,730070;兰州大学,资源环境学院,甘肃,兰州,730000
2. 兰州大学,资源环境学院,甘肃,兰州,730000 |
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| 基金项目： | 国家高技术研究发展计划(863计划)，教育部科学技术研究项目，国家自然科学基金，西北师范大学校科研和教改项目 |
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| 摘 要： | 分析了窑街盆地中侏罗世孢粉化石,建立了窑街盆地中侏罗世的孢粉组合.其基本特征为:组合中以裸子植物花粉占优势,约占64.3%～72.1%;蕨类植物孢子次之,占27.9%～35.7%,蕨类孢子以Cyathidites,Deltoidospora等为主;裸子植物花粉中双气囊的松柏类花粉最丰富.进一步明确了窑街组的地层时代,探讨了窑街盆地的古植被、古气候及古地理演化特征.
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| 关 键 词： | 孢粉组合 古环境 甘肃窑街 中侏罗世 |
| 文章编号： | 0455-2059（2006）03-0008-06 |
| 收稿时间： | 2005-02-27 |
| 修稿时间： | 2005-02-27 |
Sporo-pollen assemblage of the middle Jurassic period from Yaojie, Gansu and its paleoenvironmental significance |
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| XIN Cun-lin,SUN Bai-nian,WEI Li-jie,Xiao Liang.Sporo-pollen assemblage of the middle Jurassic period from Yaojie, Gansu and its paleoenvironmental significance[J].Journal of Lanzhou University(Natural Science),2006,42(3):8-13. |
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| Authors: | XIN Cun-lin SUN Bai-nian WEI Li-jie Xiao Liang |
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| Institution: | 1.School of Geography and Environment, Northwest Normal University, Lanzhou 730070, China; 2. School of Resources and Environment, Lanzhou University, Lanzhou 730000, China |
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| Abstract: | With primary analysis of middle Jurassic sporo-pollen assemblage from Yaojie Basin in Gansu Province, zone of Cyathidites-Neoraistrickia-Piceaepollenite/Quadraeculuna (CNP/Q) is constructed and its characters are as follows: The pollen of gymnosperm in which disaccate pollen of coniferales is most abundant is the dominant type in CNP assemblage zone (64.3%-72.1%). The spores of fern take the second place (27.9%-35.7%) which is mainly composed of Cyathidites and Deltoidospora et. of them, Cyathidites minor is the dominant type. The geological age of Yaojie formation is proved, and paleovegetation and paleoclimate of Yaojie Basin are also discussed. |
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| Keywords: | sporo-pollen assemblage paleoenvironment Yaojie middle Jurassic period |
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