| 桦甸盆地始新世孢粉特征及其古气候指示意义 |
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| 引用本文： | 孟庆涛,郑国栋,刘招君,胡菲,孙平昌,周人杰.桦甸盆地始新世孢粉特征及其古气候指示意义[J].世界地质,2016,35(1):1-8. |
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| 作者姓名： | 孟庆涛 郑国栋 刘招君 胡菲 孙平昌 周人杰 |
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| 作者单位： | 1. 吉林大学 地球科学学院，长春 130061; 2. 吉林省油页岩与共生能源矿产重点实验室，长春 130061; 3. 东北亚生物演化与环境教育部重点实验室，长春 130026; 4. 多伦多大学 地质系，多伦多 M5S 3B1，加拿大 |
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| 摘 要： | 系统研究了桦甸盆地始新世植物孢粉的特征,并采用共存因子分析法定量重建该区始新世气候变化。通过详细鉴定和统计,桦甸盆地始新世桦甸组共鉴定出孢粉85属100种,以被子植物花粉占绝对优势,其中栎粉、椴粉、桤木粉和榆粉含量较高,裸子植物花粉和蕨类植物孢子含量较低,孢粉组合中热带-亚热带分子较多,但含量低于温带及亚热带,属北亚热带温暖湿润气候。通过共存分析获得的桦甸盆地始新世气候参数:年均温为13.6℃~18.4℃、最热月均温23.6℃~27.9℃、最冷月均温5.5℃~7.8℃、年降雨量887~1 206 mm、最湿月降雨量187~236 mm、最干月降雨量16~41mm、最温暖月降雨量45~143 mm。相比较于吉林东部珲春盆地始新世的孢粉植物群和古气候,差异不大,均属典型的温暖湿润的气候环境。
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| 关 键 词： | 始新世 孢粉 古气候重建 共存因子分析 桦甸盆地 |
Palynofloral characteristics and indications for Eocene climate in Huadian Basin |
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| MENG Qing-Tao,ZHENG Guo-Dong,LIU Zhao-Jun,HU Fei,SUN Ping-Chang,ZHOU Ren-Jie.Palynofloral characteristics and indications for Eocene climate in Huadian Basin[J].World Geology,2016,35(1):1-8. |
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| Authors: | MENG Qing-Tao ZHENG Guo-Dong LIU Zhao-Jun HU Fei SUN Ping-Chang ZHOU Ren-Jie |
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| Institution: | 1. College of Earth Sciences，Jilin University，Changchun 130061，China; 2. Key- Lab for Oil Shale and Coexistent Energy Minerals of Jilin Province，Changchun 130061，China; 3. Key- Lab of Evolution of Past Life and Environment in NE Asia，MOE (Jilin University)，Changchun 130026，China; 4. Department of Geology，University of Toronto，Toronto M5S 3B1，Canada |
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| Abstract: | This paper systematically studies the Eocene palynological characteristics in Huadian Basin，and quantitatively reconstructs the Eocene climatic change，adopting method of the Coexistence Approach (CA)． 85 genera and 100 species are identified in the Eocene Huadian Formation，which indicates that the palynoflora is characterized by the dominance of angiosperm pollen，and Quercoidites，Alnipollenites，Ulmipollenites and Tiliaepol- lenites are overwhelmingly predominant among the angiosperm pollen． The contents of gymnosperm pollen and fern spores are lower． The palynological assemblages show that the tropical- subtropical taxa are some abundant，while lower than temperate and subtropical taxa in contents，which indicates a northern subtropical warm and humid cli- mate． The Eocene climate of Huadian Basin is quantitatively reconstructed by the Coexistence Approach，in which the MAT (13. 6 ～18. 4℃)，MWMT (23. 6℃ ～27. 9℃)，MCMT (5. 5℃ ～7. 8℃)，MAP (887 ～1 206 mm)， HMP (187 ～236 mm)，LMP (16 ～ 41 mm) and WMP (45 ～ 143 mm) are estimated． The comparison of pa- lynofloras and palaeoclimates between the Huadian and Hunchun basins in eastern Jilin Province suggests that the Eocene climates of the two basins are very similar，i． e． both are warm and humid． |
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| Keywords: | Eocene pollen quantitively reconstruction on palaoclimate coexistence approach Huadian Basin |
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