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| 渭河谷地晚新生代地表环境巨变的孢粉记录 | |
| 引用本文： | 童国榜,吴锡浩.渭河谷地晚新生代地表环境巨变的孢粉记录[J].地质力学学报,2000,6(4):11-18. |
| 作者姓名： | 童国榜 吴锡浩 |
| 作者单位： | 1. 中国地质科学院水文地质环境地质研究所,河北,石家庄,050061;中国科学院湖泊沉积与环境开放研究实验室,江苏,南京,210008 2. 中国地质科学院地质力学研究所,北京,100081 3. 中国地质科学院水文地质环境地质研究所,河北,石家庄,050061 4. 中国科学院西安黄土与第四纪地质国家重点实验室,陕西,西安,710054 5. 河北省文物研究所,河北,石家庄,050031 |
| 基金项目： | 国土资源部科研项目，中国科学院重点实验室基金，950113，，， |
| 摘 要： | 本文在总结渭河谷地２０多个孢粉剖面的基础上，依据古地磁资料确定其时代，并在空间和时间上进行孢粉组合对比，从而建立了１０个区域孢粉组合带。由此提出３．５ＭａＢＰ以来孢粉植物群的演化经历了５个阶段：由阔叶林－－针叶林－－森林草原与草原－－森林草原与茺漠草原－－草原－－森林草原与草原。这５个阶段标志着地表环境系统发生巨大变革，变革时间为２．５ＭａＢＰ，２．０ＭａＢＰ，１．４／１．６ＭａＢＰ和０．８ＭａＢ |
| 关 键 词： | 渭河谷地 晚新生代 地表环境巨变 孢粉植物群 |
| 收稿时间： | 2000/10/7 0:00:00 |
PALYNOEVENTS SINCE LATE CENOZOIC IN WEIHE VALLEY AND CLIMATE CHANGES |
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| TONG Guo-bang,WU Xi-hao,CHEN Yun,ZHANG Jun-pai,WANG Shu-bing,LI Yue-cong,CAO Jia-dong.PALYNOEVENTS SINCE LATE CENOZOIC IN WEIHE VALLEY AND CLIMATE CHANGES[J].Journal of Geomechanics,2000,6(4):11-18. | |
| Authors: | TONG Guo-bang WU Xi-hao CHEN Yun ZHANG Jun-pai WANG Shu-bing LI Yue-cong CAO Jia-dong |
| Institution: | Institute of Geomechanics, CAGS, Beijing 100081, China;Institute of Geomechanics, CAGS, Beijing 100081, China,Open Laboratory of Lake Sediment and Environment, Chinese Academy of Sciences, Nanjing 210008, China;Open Laboratory of Lake Sediment and Environment, Chinese Academy of Sciences, Nanjing 210008, China,Institute of Geomechanics, CAGS, Beijing 100081, China,Institute of Geomechanics, CAGS, Beijing 100081, China,Open Laboratory of Lake Sediment and Environment, Chinese Academy of Sciences, Nanjing 210008, China,State Key Laboratory of Loess and Quaternary Geology, Chinese Academy of Sciences, Xi''an 710054, China and Institute of Geomechanics, CAGS, Beijing 100081, China |
| Abstract: | Weihe valley is one of the areas where the study on late Cenozoic palynology began very early,involving more than twenty sections. By comparing the temporal and spatial distribution of the sporollon assemblages coupled with paleo-geomagnetism dating,we have ten areal zones. Since 3.5MaBP,the palynoflora were found to have evolved go through five stages,i.e.broad-leaf trees stage,conifer trees stage,woody grassland and grassland stage,woody grassland and desert grassland stage,grassland stage,and lastly woody grassland and grassland. These stages mark the megaevolution of the surface''s environments beginning respectively from 2.5MaBP,2.0MaBP,1.4/1.6MaBP,and 0.8MaBP. |
| Keywords: | Weihe valley late Cenozoic surface''s environment megaevolution palynoflora |
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