Wave moment geodynamics

Abstract

Abstract:The geomedium block concept envisages that stresses in the medium composed of rotating blocks have torque and thus predetermine the medium's energy capacity (in terms of [Ponomarev, 2008]). The present paper describes the wave nature of the global geodynamic process taking place in the medium characterized by the existence of slow and fast rotation strain waves that are classified as a new type of waves. Movements may also occur as rheid, superplastic and/or superfluid motions and facilitate the formation of vortex geological structures in the geomedium.Our analysis of data on almost 800 strong volcanic eruptions shows that the magma chamber's thickness is generally small, about 0.5 km, and this value is constant, independent of the volcanic process and predetermined by properties of the crust. A new magma chamber model is based on the idea of 'thermal explosion'/'self-acceleration' manifested by intensive plastic movements along boundaries between the blocks in conditions of the low thermal conductivity of the geomedium. It is shown that if the solid rock in the magma chamber is overheated above its melting point, high stresses may occur in the surrounding area, and their elastic energy may amount to 10 15 joules per 1 km 3 of the overheated solid rock. In view of such stresses, it is possible to consider the interaction between volcano's magma chambers as the migration of volcanic activity along the volcanic arc and provide an explanation of the interaction between volcanic activity and seismicity within the adjacent parallel arcs.The thin overheated interlayer/magma chamber concept may be valid for the entire Earth's crust. In our hypothesis, properties of the Moho are determined by the phase transition from the block structure of the crust to the nonblock structure of the upper mantle.Key words: geodynamics, force moment, rotational waves, rheid flow, gravitational waves. Аннотация: В работе развивается концепция блоковой геосреды применительно к геодинамическому (сей-смическому и вулканическому) процессу. Работу, в целом, можно представить в виде четырех частей: введе-ния, шести разделов, кратко описывающих разработанную ранее автором ротационную модель сейсмотекто-нического процесса, трех разделов, посвященных развитию блоковой концепции применительно к вулкани-ческому процессу, и обсуждения результатов. Recommended by S.I. ShermanВо введении на примере анализа исследований, проводимых в течение последних десятилетий сотрудни-ками Института земной коры СО РАН, показывается, что концепция тектонофизического процесса Байкаль-ской рифтовой зоны, разрабатываемая в рамках разломной тектоники на региональном уровне, не позволяет видеть всю картину в целом. Региональные концепции существенным образом опираются на представления GEODYNAMICS & TECTONOPHYSICS P U B L I S H E D B Y T H E I N S T I T U T E O F T H E E A R T H ' S C R U S T S I B E R I A N B R A N C H O F R U S S I A N A C A D E M Y O F S C I E N C E S R e c e n t G e o d y n a m i c s 345А.V. Vikulin: Geodynamics as wave dynamics… о разломах, ...