@article{fdi:010053140, title = {{D}eriving microstructure and fluid state within the {I}celandic crust from the inversion of tomography data}, author = {{A}delinet, {M}. and {D}orbath, {C}atherine and {L}e {R}avalec, {M}. and {F}ortin, {J}. and {G}ueguen, {Y}.}, editor = {}, language = {{ENG}}, abstract = {{T}he inversion of seismic data to infer rock microstructural properties and fluid flow patterns in the crust is a challenging issue. {I}n this paper, we develop an effective medium model for estimating velocities in porous media including both pores and cracks and use it to derive the distribution of crack density beneath the {R}eykjanes {P}eninsula from accurate tomography data. {O}utside the active hydrothermal areas, crack density is shown to decrease with depth. {T}here are two main reasons for this: the closure of cracks because of the increasing overburden and the secondary filling of cracks because of hydrothermal flows. {H}owever, crack density may locally increase with depth beneath the southwestern part of the {K}leifarvatn lake. {T}his is consistent with the presence of a deep reservoir with supercritical fluids under pressure, which may activate hydrofracturing processes. {W}e recognize that capturing the link between seismic data and the physical properties of crust is very difficult. {T}his study shows that a combination of mechanical concepts and effective medium theory contributes to improve our understanding of the phenomena occurring within the {I}celandic crust. {C}itation: {A}delinet, {M}., {C}. {D}orbath, {M}. {L}e {R}avalec, {J}. {F}ortin, and {Y}. {G}ueguen (2011), {D}eriving microstructure and fluid state within the {I}celandic crust from the inversion of tomography data, {G}eophys. {R}es. {L}ett., 38, {L}03305, doi:10.1029/2010{GL}046304.}, keywords = {{ISLANDE}}, booktitle = {}, journal = {{G}eophysical {R}esearch {L}etters}, volume = {38}, numero = {}, pages = {{L}03305}, ISSN = {0094-8276}, year = {2011}, DOI = {10.1029/2010gl046304}, URL = {https://www.documentation.ird.fr/hor/fdi:010053140}, }