| 青藏公路纳赤台地区融冻褶皱及其古气候意义 |
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| 引用本文： | 王绍令,边纯玉.青藏公路纳赤台地区融冻褶皱及其古气候意义[J].地理研究,1993,12(1):94-100. |
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| 作者姓名： | 王绍令 边纯玉 |
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| 作者单位： | 1. 中国科学院冰川冻土研究所;2. 地矿部九○六水文地质工程地质大队 |
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| 摘 要： | 昆仑河及其主要支流的Ⅳ—Ⅰ级阶地发育着融冻褶皱,其形成时代为两期:晚更新世末期(距今20725—14041年),全新世中期(距今约3000年)。它际志着本区在晚更新世末期为连续多年冻土区,年平均气候较今低5—6℃;在全新世新冰期时为岛状多年冻土区,年平均气温较今低2.5—3.0℃。
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| 关 键 词： | 融冻褶皱 分布 成因 古气候意义 |
| 收稿时间： | 1989-12-28 |
| 修稿时间： | 1991-03-18 |
THE INVOLUTONS AND THEIR PALAEOCLIMATIC SIGNIFICANCE IN THE NACHI TAI REGION ALONG,THE QINGHAI-XIZANG HIGHWAY |
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| Wang Shading.THE INVOLUTONS AND THEIR PALAEOCLIMATIC SIGNIFICANCE IN THE NACHI TAI REGION ALONG,THE QINGHAI-XIZANG HIGHWAY[J].Geographical Research,1993,12(1):94-100. |
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| Authors: | Wang Shading |
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| Institution: | 1. Lanzhou Jinstitute of Glaciology and Geoyology, Chinese Academy of Sciences;2. 906 Hydrogeological and Engineering Geologic Brigade, Ministry of geology and Minerals, China |
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| Abstract: | There are a lot of involutions in the IV-I terraces of the Kunlun River and its main branches. The time that formed involutions may he divided into two periods as follows:The latest period of Pleistocene (20725-14041Y.B.P.) and the middle period of Halocene (about 3000Y.B.P.). It means that continuous permafrost was developed at the latest period of Pleistocene and annual air temperature was 5-6℃ lower at that time than at present,and that isolated peemafrost was developed at the middle period of Holocene and annual air temperature was 2.5-3.9℃ lower at that time than at present in this region.The loess and blown sard accumulation continuously indicate that the climate was drier since the latest period of Pleistocene than at present in this region. |
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| Keywords: | involutions distribution formation palaeoclimatic significance |
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