始新世以来地球轨道偏心率的演化  

VARIATION OF ECCENTRICITY OF EARTH ORBIT SINCE THE EOCENE

作　　者：尹志强[1] 韩延本[1] 徐道一[2] 姚益民[3] 韩永刚[1] 

机构地区：[1]中国科学院国家天文台,北京100012 [2]中国地震局地质研究所,北京100029 [3]中石化胜利油田有限公司地质科学研究院,山东东营257015

出　　处：《地层学杂志》2007年第S2期443-448,共6页Journal of Stratigraphy

基　　金：国家自然科学基金项目(No10373017)资助

摘　　要：地球轨道要素的变化已作为确定地质年表的一种重要依据。应用地球轨道参数变化理论计算值来进行小波分析,结果清楚地展示出偏心率值约100ka、405ka、1Myr和2.3Myr等周期成份的随时间变化特征,100ka和405ka周期的振幅强度的变化成反相位关系,2.3Myr周期对100ka和405ka周期成份有调制作用。0—51Ma范围内变化较为稳定的地球轨道偏心率值的变化分析可以为地质年龄的划分和对比提供一定的参考。The orbital method has been taken as one of the important methods for establishing the new geological time scale. Based on the result of variation of eccentricity, which was calculated by Laskar et al. (2004), wavelet transformation method was used to give the temporal-variation characteristicis of about 100 ka, 405 ka, 1 Myr and 2.3 Myr periods of eccentricity, and some characteristics of eccentricity are exhibited, such as the extent variation of amplitude of 100 ka and 405 ka periods has opposite phase, 2.3 Myr period modulates the 100 ka and 405 ka periods, furthermore, the most important 405 ka period was discussed in detail. These results might be an appropriate reference for stratigraphic division and correlation.

关 键 词：地球轨道偏心率 小波分析 地质时代 古近纪 新近纪 第四纪 

分 类 号：P534.6[天文地球—古生物学与地层学]