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| 青海湖东岸的风沙堆积 | |
| 引用本文： | 徐叔鹰,徐德馥. 青海湖东岸的风沙堆积[J]. 中国沙漠, 1983, 3(3): 11-17 |
| 作者姓名： | 徐叔鹰 徐德馥 |
| 作者单位： | 兰州大学地质地理系 |
| 摘 要： | 风沙堆积和风成沙丘的发育在分布上服从于两条规律, 一条是地带性规律, 即绝大多数沙漠均分布于干旱地区, 或在副热带高压带及其产生的信风带, 或在温带干旱大陆中心, 另一条是非地带性规律, 即在某些非干旱区域如河流、海岸或湖泊的沙质滨岸地带, 只要有一定的风力条件也可形成风沙堆积。 |
| 收稿时间： | 1982-09-04 |
A primary Observation of Aeolian sand Deposits on Eastern Shore of the Qinghai Lake |
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| Xu Shuying,Xu Defu. A primary Observation of Aeolian sand Deposits on Eastern Shore of the Qinghai Lake[J]. ournal of Desert Research, 1983, 3(3): 11-17 | |
| Authors: | Xu Shuying Xu Defu |
| Abstract: | The sand dunes on the eastern shore of the Qinghai Lake are distributed over three areas,namely over riparian plain of the eastern of the lake, the Sand Island and the sand bank inside the lake as well as over the divide area of Daotang River, occupy approximately an area of 475 km. The dune types are mainly star dune and barchan and are characterized by dense distribution and big scale. The sand materials supply comes mainly from the alluvial-lacustrine deposits of the Recent epoch in valley-mouth delta in western and northern of the lake, and they are blown to accumulate on the eastern shore of the lake. The lake was in a condition of high lake surface during the Later pleistocene epoch and the aeolian sand deposits are formed since the Early Recent epoch along with the lake contracts. The aeolian sanb was occurred in two periods of dry and cold, i.e. cold period and neoglacial period in the Early Recent epoch. A period of warm and wet has been represented by the fossil soil bed between new and fossil dunes in both above-mentioned periods. It is found from the dating of C14 that the fossil soil bed was formed before 3960±100 years. |
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