Calculating lunar retreat rates using tidal rhythmites
Calculating lunar retreat rates using tidal rhythmites
复制标题
使用潮汐节律计算月球退缩率
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
A. Zawistoski
中科院分区：
文献类型：
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作者：
E. Kvale;Hollis W. Johnson;C. Sonett;A. W. Archer;A. Zawistoski
摘要潮汐韵律层是一种小尺度的沉积构造，它可以保存由天文学引起的潮汐周期的等级。它们还可以保存周期性非潮汐沉积的记录。如果正确的解释和理解，潮汐韵律可以是古天文学的一个重要组成部分，并可用于提取古代月球轨道动力学的信息，包括地质时期的地月距离变化。在这里，我们提出了可以用来计算古代地月距离的技术。这些技术中的每一种，当用于现代高潮数据集时，都会导致月球轨道周期和地月距离的计算估计值落在实际值的1%以内。现代潮汐数据的结果比较表明，古潮汐韵律数据短至4个月，可以提供适当的估计月球轨道周期，如果这些潮汐记录是完整的。基本潮汐理论的理解允许评估完整的古代潮汐记录来自潮汐韵律的分析。利用这里介绍的技术，从岩石记录来看，月球轨道后退在古生代中期的某个时候减慢了。
ABSTRACT Tidal rhythmites are small-scale sedimentary structures that can preserve a hierarchy of astronomically induced tidal periods. They can also preserve a record of periodic nontidal sedimentation. If properly interpreted and understood, tidal rhythmites can be an important component of paleoastronomy and can be used to extract information on ancient lunar orbital dynamics including changes in Earth-Moon distance through geologic time. Herein we present techniques that can be used to calculate ancient Earth-Moon distances. Each of these techniques, when used on a modern high-tide data set, results in calculated estimates of lunar orbital periods and an Earth-Moon distance that fall well within 1 percent of the actual values. Comparisons to results from modern tidal data indicate that ancient tidal rhythmite data as short as 4 months can provide suitable estimates of lunar orbital periods if these tidal records are complete. An understanding of basic tidal theory allows for the evaluation of completeness of the ancient tidal record as derived from an analysis of tidal rhythmites. Utilizing the techniques presented herein, it appears from the rock record that lunar orbital retreat slowed sometime during the mid-Paleozoic.