Multi-dimensional integrated geophysical-petrological modelling of the crust, and uppermost mantle for central Europe region by structural joint inversion
SASPRO 1497/03/01/ CRITHON3D
Investigators from institution:
Geophysical research, particularly using geoelectrical methods, significantly contributes to understanding and exploring processes related to strategic energy and mineral resources. The combination of different geophysical methods in a single inversion scheme reduces the non-uniqueness of inversion problems and the resulting models. Integrated geophysical and petrological modelling, together with inverse problems, represents some of the most interesting research topics for geophysical studies. In this project a petrologically driven approach with LitMod3D package, which models geophysical observables, constrained by topographic height and heat flow, will be extended by structurally coupled crustal model created by 3D joint inversion framework code for gravity, seismic and magnetotelluric data with the new name LitMod3Dic. The original LitMod package derives realistic temperature and pressure distributions within the upper mantle and characterizes mineral assemblages of given bulk chemical compositions as well as water content, which will allow us to define a bulk geophysical model of the upper mantle to derive corresponding predicted geophysical observables. The implementation of crustal inversion scheme will be done in two steps: a) the MT inversion code with geoelectrical crustal model will be included, because the MT 3D inversion code is most time consuming for numerical calculation and the necessary modifications of the MT inversion code will be essential; b) the 3D joint inversion framework approach will be included to add coupled crustal density and seismic velocities models. The final modified code LitMod3Dic will be used to undertake a multi-dimensional, petrologically-driven approach of combining MT, gravity and seismic data in inversion modelling of the upper-most mantle in the Carpatho-Pannonian region, followed by studies which will focus on the mapping of Neo-vulcanites and sub-basaltic crustal structures and thermal parameters in eastern and central Slovakia.