Abstract

Regularities in the distribution of extreme (burst) increases in paleointensities from 3000 Ma to the present have been studied. Paleointensity bursts that exceed several times its average values H_avg have been found to occur over the entire geomagnetic history. The data obtained from thermomagnetized rocks have made it possible to identify variations with characteristic times of 200 Ma in the spectrum of paleointensity variations. Wavelet analysis of sedimentary rock data revealed paleointensity variations with characteristic times of 5 Ma, 400 000 years, and 100 000 years. Until 40 Ma, the most significant burst increases in paleointensities with amplitudes of 8–9H_avg occurred with characteristic times of 5 Ma. Regardless of the burst increases in paleointensity, their durations did not exceed 100 000 years. After 40 Ma, there was a decrease in the amplitudes and characteristic times of paleointensity variations. Cyclic changes in paleointensity have the same length as the cycles of lithospheric and space–planetary processes.

中文翻译：

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地磁场史中的古强度爆发

摘要

已经研究了从3000 Ma到现在的古强度极端（爆发）分布的规律。已经发现在整个地磁历史上发生了超过其平均值H _avg几倍的古强度爆发。从热磁化岩石获得的数据使得能够识别古强度变化谱中特征时间为200 Ma的变化。对沉积岩数据的小波分析表明，古强度变化的特征时间为5 Ma，40万年和10万年。直到40 Ma，最显着的爆发以8–9 H _avg的振幅增加古强度发生特征时间为5 Ma。不管古强度突然增加，它们的持续时间都不会超过10万年。40 Ma后，古强度变化的幅度和特征时间减小。古强度的周期性变化与岩石圈和空间-行星过程的周期具有相同的长度。