Article Dans Une Revue Solid Earth Année : 2024

ECOMAN: an open-source package for geodynamic and seismological modelling of mechanical anisotropy

Résumé

Abstract. Mechanical anisotropy related to rock fabrics is a proxy for constraining the Earth's deformation patterns. However, the forward and inverse modelling of mechanical anisotropy in 3D large-scale domains has been traditionally hampered by the intensive computational cost and the lack of a dedicated, open-source computational framework. Here we introduce ECOMAN (Exploring the COnsequences of Mechanical ANisotropy), a software package for modelling strain- and stress-induced rock fabrics and testing the effects of the resulting elastic and viscous anisotropy on seismic imaging and mantle convection patterns. Differently from existing analogous software, ECOMAN can model strain-induced fabrics across all mantle levels and is optimised to run efficiently on multiple CPUs. It also enables modelling of shape preferred orientation (SPO)-related structures that can be superimposed over lattice/crystallographic preferred orientation (LPO/CPO) fabrics, which allows the consideration of the mechanical effects of fluid-filled cracks, foliated and lineated grain-scale fabrics, and rock-scale layering. One of the most important innovations is the Platform for Seismic Imaging (PSI), a set of programs for performing forward and inverse seismic modelling in isotropic–anisotropic media using real or synthetic seismic datasets. The anisotropic inversion strategy is capable of recovering parameters describing a tilted transversely isotropic (TTI) medium, which is required to reconstruct 3D structures and mantle strain patterns and to validate geodynamic models.
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Dates et versions

hal-04960670 , version 1 (21-02-2025)

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Manuele Faccenda, Brandon Vanderbeek, Albert de Montserrat, Jianfeng Yang, Francesco Rappisi, et al.. ECOMAN: an open-source package for geodynamic and seismological modelling of mechanical anisotropy. Solid Earth, 2024, 15 (10), pp.1241-1264. ⟨10.5194/se-15-1241-2024⟩. ⟨hal-04960670⟩
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