|
|
论文编号: |
20130017 |
论文题目: |
Magnetostratigraphic determination of the age of ancient Lake Qinghai, and record of the East Asian monsoon since 4.63 Ma |
英文论文题目: |
Magnetostratigraphic determination of the age of ancient Lake Qinghai, and record of the East Asian monsoon since 4.63 Ma |
第一作者: |
付超峰 |
英文第一作者: |
Fu, Chaofeng |
联系作者: |
|
英文联系作者: |
Fu CF |
外单位作者单位: |
|
英文外单位作者单位: |
|
发表年度: |
2013 |
卷: |
41 |
期: |
8 |
页码: |
875-878 |
摘要: |
|
英文摘要: |
Lake Qinghai, in North China, is the largest interior plateau lake in Central Asia, and is sensitive to climate change and the environmental effects of Tibetan Plateau uplift. We have obtained an almost continuous 626 m long sediment core from an in-filled part of the southern lake basin, which documents both the age of the origin of the lake and the evolution of the East Asian monsoon during the Late Cenozoic. High-resolution magnetostratigraphy provides a chronology back to ca. 5.1 Ma. Analysis of lithofacies and depositional environments reveal that the change from eolian to lacustrine facies occurred at ca. 4.63 Ma, corresponding to a shift from an arid or semi-arid to a more humid climate, which resulted in the origin of Lake Qinghai. Changes in sediment lithology and mean grain size indicate that the lake level fluctuated considerably, superimposed on a long-term trend from higher to lower levels in response to variations in the East Asian Monsoon. This archive is a significant additional source of information on regional and global environmental change, complementing the existing records from north China, which are mainly based on analysis of loess deposits. |
刊物名称: |
GEOLOGY |
英文刊物名称: |
GEOLOGY |
论文全文: |
|
英文论文全文: |
|
全文链接: |
|
其它备注: |
|
英文其它备注: |
|
学科: |
第四纪地质 |
英文学科: |
|
影响因子: |
4.087 |
第一作者所在部门: |
|
英文第一作者所在部门: |
|
论文出处: |
|
英文论文出处: |
|
论文类别: |
|
英文论文类别: |
|
参与作者: |
|
英文参与作者: |
|
|