晚新生代洛川典型风尘堆积序列的延伸

王先彦; 鹿化煜; 弋双文; 邓成龙

晚新生代洛川典型风尘堆积序列的延伸

王先彦^1,2,
鹿化煜^1,3,
弋双文^1,2,
邓成龙⁴

1 中国科学院地球环境研究所黄土与第四纪地质国家重点实验室, 西安 710075;
2 中国科学院研究生院, 北京 100039;
3 南京大学城市与资源学系, 南京 210093;
4 中国科学院地质与地球物理研究所, 北京 100029

基金项目:

国家自然科学基金项目(40121303,40325007)

详细信息

作者简介:
王先彦(1979-),男,博士生,从事第四纪地质与全球变化研究

中图分类号: P539.3
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- 文章访问数: 1675
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出版历程
- 收稿日期: 2005-05-30
- 修回日期: 2005-10-08

EXTENSION OF THE TYPICAL AEOLIAN SEQUENCES AT LUOCHUAN, CENTRAL CHINESE LOESS PLATEAU

1 SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China;
2 Graduate School of the Chinese Academy of Sciences, Beijing 100039, China;
3 Department of Geography, Nanjing University, Nanjing 210093, China;
4 Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China

摘要

摘要: 对中国黄土标准剖面——洛川黄土剖面之下的上新世红黏土进行了沉积特征和磁性地层学的研究,结果表明洛川红黏土堆积于约2.6~3.2 MaBP期间,从而确定世界惟一的黄土类地质公园的风尘开始堆积的年代约为3.2 MaBP。古气候替代性指标磁化率和粒度的分析表明,洛川风尘堆积序列记录了上新世到第四纪古气候的重大转型。
- 红黏土 /
- 风尘堆积 /
- 古气候 /
- 黄土国家地质公园
Abstract: In this work,the ‘Red Clay’ deposit underlying the typical loess-paleosol sequence at Luochuan,central Chinese Loess Plateau,is studied on magnetostratigraphy,grain size distribution and magnetic susceptibility.It shows that aeolian deposit of the late Cenozoic at Luochuan,the National Loess Park,started at least since 3.2 Ma before present.Proxy index of paleoclimate of this aeolian sequence such as grain size distribution and magnetic susceptibility indicates that the paleoclimate was relatively warmer and less varied during the late Pliocene than that of the loess deposit during the Quaternary period and there was a significant climate shifting that took place around 2.6 MaBP,the boundary of the Pliocene and Pleistocene in North China.
- Red Clay /
- National Loess Park /
- palaeoclimate /
- central Chinese Loess Plateau

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参考文献(18)

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