4.6 Article

Thermodynamically consistent model for poroelastic rocks towards tectonic and volcanic processes and earthquakes

Journal

GEOPHYSICAL JOURNAL INTERNATIONAL
Volume 227, Issue 3, Pages 1893-1904

Publisher

OXFORD UNIV PRESS
DOI: 10.1093/gji/ggab317

Keywords

Fracture and flow; Plasticity; diffusion; and creep; Geomechanics; Non-linear differential equations; Dynamics of lithosphere and mantle; Magma genesis and partial melting

Funding

  1. MSMT CR (Ministry of Education of the Czech Republic) [CZ.02.1.01/0.0/0.0/15-003/0000493, RVO:61388998]

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The general-purpose model combines concepts from multiple fields and describes various geological phenomena while satisfying fundamental laws such as mass conservation and energy conservation.
A general-purpose model combining concepts from rational continuum mechanics, fracture and damage mechanics, plasticity and poromechanics is devised in Eulerian coordinates, involving objective time derivatives. The model complies with mass, momentum and energy conservation as well as entropy inequality and objectivity. It is devised to cover many diverse phenomena, specifically rupture of existing lithospheric faults, tectonic earthquakes, generation and propagation of seismic waves, birth of new tectonic faults, or volcanic activity, aseismic creep, folding of rocks, aging of rocks, long-distance saturated water transport and flow in poroelastic rocks, melting of rocks and formation of magma chambers, or solidification of magma.

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