| 塔里本盆地北部全新世地层中的孢粉组合与古环境 |
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| 引用本文： | 李志中,关有志,贾惠兰,孙忠.塔里本盆地北部全新世地层中的孢粉组合与古环境[J].干旱区资源与环境,1996(1). |
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| 作者姓名： | 李志中 关有志 贾惠兰 孙忠 |
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| 作者单位： | 新疆师范大学地理系，中国科学院兰州沙漠研究所 |
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| 基金项目： | 国家“八五”科技攻关项目 |
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| 摘 要： | 通过对塔里木盆地北部全新世地层中２７块样品的孢粉分析，根据其组合特征并结合表土花粉分析，本区全新世以来除了塔里木河中游隐域性植被成分随着河流改道变化频繁外，两侧显域性的早生、超旱生荒漠植被成分无明显变化，它们的生境反映了气候环境总的形势是持续干旱的。但全新世地层中孢粉种属和丰度的变化，蒿属、藜科和麻黄花粉相对数量的增减也说明了在干旱背景中本区气候有微弱的干湿波动，表现为全新世早期和晚期气候偏凉湿，中期气候干暖，但干暖期鼎盛阶段略湿。
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| 关 键 词： | 塔里木盆地北部，全新世，孢粉组合，气候环境 |
POLLEN COMPONENT IN THE HOLOCENE STRATUM AND PALAEOENVIRONMENT IN THE NORTHERN PART OF TARIM BASTN |
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| Li Zhizhong.POLLEN COMPONENT IN THE HOLOCENE STRATUM AND PALAEOENVIRONMENT IN THE NORTHERN PART OF TARIM BASTN[J].Journal of Arid Land Resources and Environment,1996(1). |
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| Authors: | Li Zhizhong |
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| Abstract: | Through pollen analysis of 27 samples collected from the Holocene stratum in the northern part of Tarim Basin, totally 3446 grains of pollens have been determined, of which, herb or bush pollens are 3136, tree pollens are 303, and pteridophyte pollens are 7,belong to 29 families. Based on the composition features of the stratum and the palynofloras of the surface soil, three assemblage zones are divided. Because there were obtuse change in the composition of dry and ultra -dry ecological desert vegetation zonary in this region, except that of regional vegetion of Tarim Rever Basin, we believed that the Holocene climate in this region had been dry as a whole. But there were also small change in quantity of pollen family and abundance, and in that of Artemisia, Chenopodiaceae and Ephedra pollens etc. in the stratum. It is indicated that there had been small wet and dry fluctuations under the background of dry climate. That is, the palaeoclimate in this region had experienced relatively cold and moist in the early and late stage, warm and dry in the middle stage during the Holocene Epoch. And, it might be a little wet at the Megathermal Maximum. |
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| Keywords: | Northern part of Tarim Basin Holocene Epoch Pollen component Climate environment |
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