| 西藏阿里札达盆地香孜剖面孢粉分析 |
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| 引用本文： | 韩建恩,余佳,孟庆伟,吕荣平,朱大岗,孟宪刚,邵兆刚,HAN Jian-en,YU Ji,MENG Qing-wei,Lü Rong-ping,ZHU Da-gang,MENG Xian-gang,Shao Zhao-gang.西藏阿里札达盆地香孜剖面孢粉分析[J].地质力学学报,2005,11(4):320-327. |
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| 作者姓名： | 韩建恩 余佳 孟庆伟 吕荣平 朱大岗 孟宪刚 邵兆刚 HAN Jian-en YU Ji MENG Qing-wei Lü Rong-ping ZHU Da-gang MENG Xian-gang Shao Zhao-gang |
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| 作者单位： | 中国地质科学院地质力学研究所,北京,100081 |
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| 基金项目： | 中国地质调查局资助项目;中国地质调查局资助项目 |
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| 摘 要： | 通过对西藏阿里札达盆地香孜剖面的孢粉分析,初步定出该地区新近纪和第四纪的界线,并得到更新世晚期以来该地区植被与环境发展的历史。约在2.68~2.45Ma期间,植被以乔木为主,主要为松、藜、蒿,属山地寒温气候;约在2.45~2.11Ma期间,草本植物迅速上升,气候变得干旱寒冷,显示出灌木草原气候特征;在2.11~1.49Ma期间,草本植物数量和种类达到之最,灌木相对增加,也显示气候进一步趋于干旱;在1.49~1.36Ma期间,草本植物有小幅下降,但蕨类植物增加幅度较大,显示了干冷草原气候特征。
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| 关 键 词： | 西藏 札达盆地 植被 香孜剖面 孢粉分析 |
| 文章编号： | 1006-6616(2005)04-0320-08 |
| 收稿时间： | 2005/7/11 0:00:00 |
| 修稿时间： | 2005年7月11日 |
PALYNOLOGICAL RECORDS IN THE QANGZ(E) SECTION OF THE ZANDA BASIN, NGARI, TIBET |
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| HAN Jian-en,YU Ji,MENG Qing-wei,ZHU Da-gang,MENG Xian-gang,Shao Zhao-gang.PALYNOLOGICAL RECORDS IN THE QANGZ(E) SECTION OF THE ZANDA BASIN, NGARI, TIBET[J].Journal of Geomechanics,2005,11(4):320-327. |
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| Authors: | HAN Jian-en YU Ji MENG Qing-wei ZHU Da-gang MENG Xian-gang Shao Zhao-gang |
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| Institution: | Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081,Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081,Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081,Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081,Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081,Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081 and Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081 |
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| Abstract: | Based on palynological records of the Qangzê section in Zanda basin,Ngari,Tibet,the authors have preliminarily defined the Neogene-Quaternary boundary in the area and revealed the vegetational and environmental history of the area since the late Pleistocene.During~2.68-2.45 Ma,the vegetation was dominated by arbores,mainly Pinus,Chenopodiaceae and Artemisia,indicating a cold warm climate in the mountain region.During~2.45-2.11 Ma,herbs increased rapidly and the climate became dry-cold,indicating the characteristic of the bushveld climate.During 2.11-1.49 Ma,the quantity and species of the herbs reached the culmination and the bush increased accordingly,showing that the climate became more and more arid.During 1.49-1.36 Ma,herbs declined slightly but pteridophytes increased relatively greatly,revealing a dry-cold grassland climate. |
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| Keywords: | Tibet Zanda basin paleovegetation Qangzê section environment palynological records |
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