临夏盆地新生代沉积物岩石磁学记录与亚洲内陆干旱化

徐先海; 方小敏

临夏盆地新生代沉积物岩石磁学记录与亚洲内陆干旱化

徐先海¹,
方小敏^2,3

1 安徽省安庆师范学院资源环境系, 安庆 246011;
2 中国科学院青藏高原研究所, 北京 100085;
3 兰州大学西部环境教育部重点实验室, 兰州大学地理系, 兰州 730000

基金项目:

国家重点基础研究发展规划项目(2005CB42200)

国家自然科学基金重点基础项目(40334038)

详细信息

作者简介:
徐先海(1971-),男,博士,主要从事人类环境演化与对策研究,E-mail:xuxianhai5@163.com

中图分类号: P539.3
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出版历程
- 收稿日期: 2007-03-09
- 修回日期: 2007-06-06

ROCK MAGNETIC RECORD OF CENOZOIC LAKE SEDIMENTS FROM THE LINXIA BASIN AND THE ARIDIFICATION OF ASIAN INLAND

XU Xian-hai¹,
FANG Xiao-min^2,3

1 Anqing Teachers College, Anhui Anqing 246011, China;
2 Institute of Tibetan Plateau Research, CAS, Beijing 100085, China;
3 MOE Key Laboratory of West China's Environmental Systems, Lanzhou Universtiy, Lanzhou 730000, China

摘要

摘要: 临夏盆地毛沟剖面沉积物岩石磁学记录与石英砂颗粒电子扫描研究表明:13.07~8.6 Ma间盆地气候一直保持相对稳定,从8.6 Ma开始,盆地沉积物中流域外的风尘物质开始增加,并经过了6.4 Ma和5.3 Ma的两次加速过程,揭示了我国西北内陆干旱气候可能从8.6 Ma左右开始,且在6.4 Ma和5.3 Ma左右经过两次加强过程。
- 岩石磁学 /
- 干旱化 /
- 高原隆升 /
- 全球变冷 /
- 临夏盆地
Abstract: By means of high resolution research of rock magnetic records and quartz sands from Maogou section in the Linxia basin,we reveal that after a relative stable environment between 13.07 and 8.6 Ma, the basin was gradually influxed by eolian dusts at about 8.6 Ma, and the fluxes of eolian dusts got two rapid increases at about 6.4 Ma and 5.3 Ma respectively. The study suggests that the drying of northwest China began at 8.6 Ma and was strengthened rapidly at about 6.4 Ma and 5.3 Ma.
- rock magnetism /
- quartz sands /
- aridification /
- Linxia basin

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参考文献(22)

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