Physical Foundations of Recent Geodynamics

IF 0.9 4区地球科学 Q4 METEOROLOGY & ATMOSPHERIC SCIENCES Izvestiya Atmospheric and Oceanic Physics Pub Date : 2024-01-16 DOI:10.1134/s0001433823080078

Yu. O. Kuzmin

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Abstract

The physical (phenomenological) foundations of recent geodynamics are considered. The definitions of geodynamics and recent geodynamics are substantiated based on ideas about the primacy of movements in the event of strains. The main tasks of the study are formulated, as are the scheme of formation of the recent geodynamic state of the subsoil. The issues of identifying the movements of the Earth’s surface are discussed and a formula is proposed for estimating the relative bending strain. It is shown that the observed strains of the Earthʼs surface, obtained by geodetic (satellite and ground) methods, are relative in nature and depend on the specific kinematic scheme of motion of individual elements (blocks) of the medium. The results of long-term repeated geodetic observations of recent vertical and horizontal movements of the Earthʼs surface in seismically active (Kopetdag, Kamchatka) and aseismic, platform regions (Pripyat depression) are presented. It is shown that the average annual rate of regional relative strains varies in the range from 10^–8 to 10^–9 year^–1. Zonal and local strains vary in the range from 10^–4 to 10^–6 year^–1. The “paradoxes” of large and small strains in recent geodynamics are formulated and their explanation is given on the basis of the equations of hereditary mechanics of solids and ideas about the parametric induction of strain processes in fault zones by small natural and technogenic impacts.

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近代地球动力学的物理基础

摘要研究了近代地球动力学的物理（现象学）基础。根据在应变情况下运动至上的观点，对地球动力学和近代地球动力学的定义进行了论证。制定了研究的主要任务，以及底土近期地球动力学状态的形成方案。讨论了确定地球表面运动的问题，并提出了估算相对弯曲应变的公式。研究表明，通过大地测量（卫星和地面）方法获得的地球表面观测应变是相对的，取决于介质中各个元素（块）的具体运动方案。本文介绍了在地震活跃地区（堪察加半岛的科佩特达格）和无地震平台地区（普里皮亚季洼地）对近期地球表面垂直和水平运动进行长期重复大地测量观测的结果。结果表明，区域相对应变的年平均速率在 10-8 至 10-9 年-1 之间变化。区域和局部应变的变化范围为 10-4 至 10-6 年-1。提出了近期地球动力学中大应变和小应变的 "悖论"，并根据固体遗传力学方程和关于小的自然和技术影响对断层带应变过程的参数诱导的观点，对这些 "悖论 "做出了解释。

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来源期刊

Izvestiya Atmospheric and Oceanic Physics 地学-海洋学

CiteScore

1.40

自引率

28.60%

发文量

审稿时长

6-12 weeks

期刊介绍： Izvestiya, Atmospheric and Oceanic Physics is a journal that publishes original scientific research and review articles on vital issues in the physics of the Earth’s atmosphere and hydrosphere and climate theory. The journal presents results of recent studies of physical processes in the atmosphere and ocean that control climate, weather, and their changes. These studies have possible practical applications. The journal also gives room to the discussion of results obtained in theoretical and experimental studies in various fields of oceanic and atmospheric physics, such as the dynamics of gas and water media, interaction of the atmosphere with the ocean and land surfaces, turbulence theory, heat balance and radiation processes, remote sensing and optics of both media, natural and man-induced climate changes, and the state of the atmosphere and ocean. The journal publishes papers on research techniques used in both media, current scientific information on domestic and foreign events in the physics of the atmosphere and ocean.