| 从碱湖沉积和孢粉组合看内蒙古伊盟地区近5ka以来的古植被古气候变迁 |
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| 引用本文： | 王吉平,张淑霞,周建民,杨清堂,马秀莲.从碱湖沉积和孢粉组合看内蒙古伊盟地区近5ka以来的古植被古气候变迁[J].化工矿产地质,1996(4). |
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| 作者姓名： | 王吉平 张淑霞 周建民 杨清堂 马秀莲 |
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| 作者单位： | 化学工业部化学矿产地质研究院 |
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| 摘 要： | 内蒙古伊盟地区哈马尔太碱湖沉积特征和孢粉组合特征反映了该区近５ｋａ以来的古植被古气候变迁。研究表明，此期间该区植被由阔叶、灌木草原变为疏树灌木草原，最后变为荒漠草原。在这５ｋａ中存在两次暖期两次冷期，近１．６ｋａ以来以冷干为主。湿润气候只存在于４．５～５．５ｋａＢ．Ｐ．，气候总的趋势是由较湿润变干旱直至干燥。
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| 关 键 词： | 伊盟碱湖 沉积特征 孢粉组合 古植被 古气候 |
PALEOCLIMATIC AND PALEOVEGETATIONAL EVOLUTION OVER THE PAST 5000 YEARS IN THE REGION OF YIKEZHAO LEAGUE,INNER MONGOLIA WITH REFERENCE TO SPOROPOLLEN ASSOCIATION AND ALKALI DEPOSITION |
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| Wang Jiping,Zhang Shuxia,Zhou Jianmin,Yang Qingtang,Ma Xiulian.PALEOCLIMATIC AND PALEOVEGETATIONAL EVOLUTION OVER THE PAST 5000 YEARS IN THE REGION OF YIKEZHAO LEAGUE,INNER MONGOLIA WITH REFERENCE TO SPOROPOLLEN ASSOCIATION AND ALKALI DEPOSITION[J].Geology of Chemical Minerals,1996(4). |
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| Authors: | Wang Jiping Zhang Shuxia Zhou Jianmin Yang Qingtang Ma Xiulian |
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| Abstract: | The sporopollen association and alkali deposition in Hamaertai alkali lake in Yikezhao League, Inner Mongolia provide imformations about the paleoclimatic evolution of the recent 5ka span in the vast region around the lake. The time span saw the paleovegetational evolution from broadleaf tree and bush lush grassland through bush spotting grassland to desert grassland. Not just this, paleclimatic changes were striking as well, doing two cold stages and two warm stages in turn. The climate has been characteristic mainly of coldness and aridness since 1.6ka ago and wetness only since between 4.5ka and 5.5ka ago, a rough climatic trend from wet to arid even to dry. |
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| Keywords: | sporopollen association paleovegetation paleoclimate alkali lakes in Yikezhao League |
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