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| 乌鲁木齐东道海子剖面的孢粉分析及其反映的环境变化 | |
| 引用本文： | 阎顺,李树峰,孔昭宸,杨振京,倪健.乌鲁木齐东道海子剖面的孢粉分析及其反映的环境变化[J].第四纪研究,2004,24(4):463-468. |
| 作者姓名： | 阎顺 李树峰 孔昭宸 杨振京 倪健 |
| 作者单位： | 中国科学院新疆生态与地理研究所,乌鲁木齐,830011;中国科学院植物研究所植被数量生态学重点实验室,北京,100093;中国科学院植物研究所植被数量生态学重点实验室,北京,100093;中国地质科学院水文地质环境地质研究所,正定,050803 |
| 基金项目： | 中国科学院知识创新重大项目 (批准号 :KZCX1-10 -0 5 )，国家自然科学基金重点项目 (批准号 :NSFC90 10 2 0 0 9)，国家重点基础研究发展规划项目 (批准号 :G19990 43 5 0 2 )资助 |
| 摘 要： | 根据乌鲁木齐河尾闾湖泊东道海子剖面的高精度孢粉分析,结合磁化率、烧失量和粒度分析资料,以剖面中含泥炭灰黑色粘土质粉砂层做的8个14C测年数据为基础,讨论了天山北麓古尔班通古特沙漠南部边缘的环境演变。研究认为:4500aB.P.以来该区域的植被是以荒漠为主的,但是1170B.C.以来,气候出现6次较大波动,1170～460B.C.,250～640A.D.和680～1645A.D.时段,气候相对冷湿,出现过荒漠草原,在这3个时段植物种类较多,覆盖度高,也是东道海子的高湖面时期,与气候的冷期对应;相反,在460B.C.～250A.D.,640～680A.D.和1645A.D.以来时段,属荒漠阶段,湖泊的水位相对下降,属中湖面期,与气候的暖期对应 |
| 关 键 词： | 乌鲁木齐 东道海子 孢粉、植被与环境 |
| 文章编号： | 1001-7410(2004)04-463-07 |
| 收稿时间： | 2003-10-20 |
| 修稿时间： | 2003年10月20 |
THE POLLEN ANALYSES AND ENVIRONMENT CHANGES OF THE DONGDAOHAIZI AREA IN (U)R(U)MQI, XINJIANG |
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| Institution: | 1. Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Ürümqi 830011; 2. Laboratory of Quantitative Vegetation Ecology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093; 3. The Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Zhengding 050803 |
| Abstract: | High-precision polynological analysis was carried out on a section of the Dongdaohaizi Lake, a terminal lake of the rümqi river. On the basis of the data of the pollen analysis, the magnetic susceptibility, the loss on ignition, the grain size, and the 14C dating in the gray-black peat-bearing clayey silt layer, the evolution of environment in the south margin of Gurbantünggüt Desert was discussed. The results showed that desert vegetation was dominant in this area since 4 500aB.P. There were several climate fluctuations in this area since 1170B.C. During three periods (1170 ～ 460B.C., 250 ～ 640A.D. and 680 ～ 1645A.D.), climate was comparatively cold and humid and desert steppe prevailed over the area. There was preferable vegetation during this time intervals and the Dongdaohaizi Lake was at its high water level, corresponding to the cold periods. On the contrary, the periods of 460B.C. ～ 250A.D., and 640 ～ 680A.D. and 1645A.D. up to the present were dominated by desert vegetation, the water level was comparatively descended, corresponding to the warm climate periods. |
| Keywords: | a terminal lake of the rümqi river Dongdaohaizi pollen analysis vegetation and environment |
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