| 渭北黄土台塬全新世地层高分辨率研究 |
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| 引用本文： | 黄萍,庞奖励,黄春长. 渭北黄土台塬全新世地层高分辨率研究[J]. 地层学杂志, 2001, 25(2): 107-110 |
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| 作者姓名： | 黄萍 庞奖励 黄春长 |
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| 作者单位： | 陕西师范大学旅游与环境学院;陕西师范大学旅游与环境学院;陕西师范大学旅游与环境学院 |
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| 基金项目： | 国家自然科学基金项目!(No.40 0 710 0 6 ),中国科学院黄土与第四纪地质国家开放实验室基金项目资助 |
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| 摘 要： | 在野外观测研究的基础上 ,对陕西扶风新店村全新世黄土剖面作了详细的地层划分。通过磁化率、粒度、TOC、全铁和碳酸盐含量测定分析 ,进一步揭示渭北黄土台塬全新世季风气候变化的规律。同时 ,阐明了“全新世大暖期”的气候有明显的波动变化 ,尤其是在 6 0 0 0— 5 0 0 0 a B.P.发生了一个干旱气候事件 ,形成黄土堆积 ,使得全新世古土壤分裂成为两层 ,表现为多周期土壤。从 3 10 0 a B.P.开始至今气候变得干旱 ,风尘堆积旺盛 ,形成了现代黄土和表土层
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| 关 键 词： | 全新世 第四纪 黄土 古土壤 气候变化 渭河流域 陕西 |
| 文章编号： | 0253-4959(2001)02-0107-04 |
| 修稿时间： | 1999-11-01 |
HIGH RESOLUTION STUDIES OF THE HOLOCENE LOESS STRATA OF THE LOESS TABLELAND IN THE WEIHE RIVER BASIN |
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| HUANG Ping,PANG Jiang li,and HUANG Chun chang. HIGH RESOLUTION STUDIES OF THE HOLOCENE LOESS STRATA OF THE LOESS TABLELAND IN THE WEIHE RIVER BASIN[J]. Journal of Stratigraphy, 2001, 25(2): 107-110 |
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| Authors: | HUANG Ping PANG Jiang li and HUANG Chun chang |
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| Abstract: | A Holocene loess palaeosol profile at Xingdiancun, Fufeng County in Shaanxi province was studied by field investigations and laboratory analysis. It indicates that the loess palaeosol sequence of the loess tableland in this region is rather complete and continuous. This renders a higher resolution study of the Holocene strata and climatic change. The results show that the warm and humid climate during the Holocene Megathermal (8 500—3 100a B.P.) was actually not constant and continuous. There was an arid phase between 6 000—5 000a B.P. represented by a loess bed (L x) between palaeosols S 1 0 and S 2 0. Climate become dryer since 3 100a B.P. and therefore, eolian loess accumulation became intensified and the topsoil deteriorated. |
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| Keywords: | Holocene loess palaeosol climatic change Weihe River Basin Shaanxi |
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