Abstract—

The relationship between cyclic processes in the core and lithosphere in the Middle Jurassic–Paleogene (167–22 Ma) was investigated. The dynamics of cyclic processes was associated with paleointensity behavior and sea level. It is shown that variations in paleointensity and ocean level are two broadband oscillatory processes. The characteristic times of variations in geomagnetic and eustatic processes changed in different geologic ages. We discovered synchronization of variations in geomagnetic and eustatic processes that occurred in the Cretaceous–Early Paleogene (125–40 Ma) based on a spectral analysis of paleointensity and sea level data. The characteristic times of coherent variations in paleointensity and global ocean level ranged from 1 to 16 Ma. Possible reasons for the synchronization of geomagnetic and lithospheric processes have been identified. Features of geomagnetic and lithospheric processes in the interval of 125–40 Ma, expressed as sharp increases in the amplitudes of paleointensity variations and activation of magmatic effusive processes, are considered.

中文翻译：

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白垩纪-早期古近纪地磁场强度变化与欣喜循环和岩浆激增爆发的同步

摘要—

研究了中侏罗世-古近纪（167-22 Ma）核心与岩石圈的循环过程之间的关系。循环过程的动力学与古强度行为和海平面有关。结果表明，古强度和海平面的变化是两个宽带振荡过程。在不同的地质年代，地磁过程和欣喜过程的变化特征时间发生了变化。根据古强度和海平面数据的频谱分析，我们发现白垩纪-早古近纪（125-40 Ma）中发生的地磁过程和快乐过程的变化同步。古强度和全球海平面的连贯变化的特征时间在1到16 Ma之间。已经确定了地磁和岩石圈过程同步的可能原因。考虑了125-40 Ma间隔内的地磁和岩石圈过程的特征，表现为古强度变化幅度的急剧增加和岩浆喷发过程的激活。