摘要
重点讨论了米兰柯维奇理论地质定年若干问题的数学表达及其意义。结果表明:利用米兰柯维奇理论进行地质定年的理论依据是充分的;加强对沉积速率及其分布特征的统计和研究是改进米兰柯维奇理论地质定年效果的重要途径之一,另一重要途径则是提高被处理层段地质持续时间的确定精度;被处理井段所对应的地质持续时间,应不小于米兰柯维奇理论地质定年方法的分辨率;当被处理井段厚度较大时,应当注意米兰柯维奇旋回对应频率成分的能量大小,是否能保证旋回识别的有效性。该方法是一种新的定年方法,其数学表达式易于计算机运算的实现,为自动化定年提供了可能。
The mathematical representations and their significance are discussed in geological dating with Milankovitch theory. The results show that the theoretical basis is practicable for geological dating using Milankovitch theory. The study of the depositional velocities is an important way to improve the effect of the geological dating. Another important way is to determine the time interval of the strata to be processed accurately. The time interval must be longer than the largest Milankovitch cycle, which can be taken as the lower limit that can be recognized in geological dating. When the thickness is quite big, it should be payed attention to the effectiveness of the energy degree for the frequencies related to Milankovitch cycles. The Milankowitch theory dating method is a new method. Its mathematical representations can be used in the computer. This provide an automatic method for geological dating.
出处
《西北大学学报（自然科学版）》
CAS
CSCD
北大核心
2003年第5期599-602,共4页
Journal of Northwest University（Natural Science Edition）
基金
国家重点基础研究发展规划资助项目(G1998040801)
关键词
米兰柯维奇理论
地质定年方法
数学表达
Milankovitch theory
geological dating
mathematical representation
