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米兰柯维奇地质定年方法的数学表达及其意义 被引量:2
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作者 陈清华 刘池阳 李琴 《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
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... 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。 展开更多
关键词 米兰柯维奇理论 地质定年方法 数学表达
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Review on Dating Methods:Numerical Dating in the Quaternary Geology of High Asia 被引量:2
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作者 Matthias Kuhle Sabine Kuhle 《Journal of Mountain Science》 SCIE CSCD 2010年第2期105-122,共18页
Over the past few years, OSL and TCN datings of glacial material from High Asia have come into fashion. To this day, however, these techniques do not permit safe calibration. The intensity of the cosmic ray flux is be... Over the past few years, OSL and TCN datings of glacial material from High Asia have come into fashion. To this day, however, these techniques do not permit safe calibration. The intensity of the cosmic ray flux is being modulated by the solar and terrestrial magnetic fields and their secular fluctuations in the past. So far, these variations cannot be converted into the respective local TCN production rates for High Asia. We have reason to believe that the ages that are being calculated despite these uneertainties are generally overestimated. This assessment is supported by eonventional radiocarbon dates and above" all by the glacial chronology developed independently on the basis of the Quaternary geological method. The strongly emerging evidence for a much more extensive LGM glaciation of High Asia is, however, either being ignored or rejected by many authors, solely on the basis of the above-mentioned uncalibrated datings. This self-conceit based on the "dating fallacy", as we call it, should be avoided since it goes decidedly against the standards of the scientific method established in Quaternary geology and makes a fundamental scientific discussion impossible. 展开更多
关键词 Calibration of numerical dating Geomagnetic field excursions Solar activity Interface problem Tibetan ice sheet Dating fallacy
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