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| 甘肃通渭县黄土堆积区全新世环境变迁 | |
| 引用本文： | 付淑清,陈淑娥,魏明建,李英,李勇.甘肃通渭县黄土堆积区全新世环境变迁[J].地球科学与环境学报,2005,27(4):71-74,78. |
| 作者姓名： | 付淑清 陈淑娥 魏明建 李英 李勇 |
| 作者单位： | 1. 中国科学院,广州地球化学研究所,广州,510640 2. 长安大学,地球科学与国土资源学院,西安,710054 3. 首都师范大学,地理系,北京,100037 |
| 基金项目： | 国土资源部区域地质调查项目（I48C002003） |
| 摘 要： | 通过对甘肃通渭县四家庙全新世黄土剖面的粒度和磁化率分析。并依据前人研究成果对年均气温和年均降水量的相应恢复，揭示了该区全新世期间气候演化的特点和规律。分析认为，研究区全新世以来的环境变化是不稳定的，无论古土壤发育期还是黄土堆积期，气候都具有频繁的次级波动。尤其在全新世中期。两层古土壤间的黄土夹层，反映该区在全新世大暖期经历过一次历时千年之久的气候显著恶化事件。 |
| 关 键 词： | 粒度 磁化率 环境变迁 全新世 通渭 甘肃 气候 |
| 文章编号： | 1672-6561（2005）04-0071-04 |
| 收稿时间： | 2004-12-16 |
| 修稿时间： | 2004-12-16 |
Environmental Changes During Holocene Epoch in Loess Area in Tongwei County of Gansu Province |
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| FU Shu-qing,CHEN Shu-e,WEI Ming-jian,LI Ying,LI Yong.Environmental Changes During Holocene Epoch in Loess Area in Tongwei County of Gansu Province[J].Journal of Earth Sciences and Environment,2005,27(4):71-74,78. | |
| Authors: | FU Shu-qing CHEN Shu-e WEI Ming-jian LI Ying LI Yong |
| Abstract: | A Holocene loess profile in Tongwei County,Gansu Province,was studied by field investigation and laboratory(analysis) of grain-size(GZ) and measurement of magnetic susceptibility(MS).Meanwhile,based on the MS records,this paper estimated the mean annual temperature and rainfall since about 10 ka BP These records indicate that the climatic(environment) of Holocene in Tongwei county is unstable,especially during the middle Megathermal period,a cold and arid (event) occurred in the studied area,which is represented by loess Lx lying between S~1_0 and S~2_0. |
| Keywords: | Grain-size magnetic susceptibility change of climatic environment Holocene Tongwei County Gansu Province |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |