Low permeability fault rocks may develop due to a combination of processes including. (i) deformation induced by mixing of heterogeneously distributed fine-grained material (silt and clay) with framework grains, compaction and pressure solution, cataclasis, clay smear, and cementation.
With the aim of gaining in-depth understanding of the deformation mechanism responsible to the development of specific petrophysical properties of fault rocks, the activities carried out within this project include: (i) Optical microscopy and FESEM analyses; (ii) fluid inclusions analysis; (iii) mechanical and permeability analyses by using a completely automatic triaxial cell. Results of such a work are helpful for minimizing the risks associated with fault seal evaluation.
|Mechanical data for triaxial compression experiment,3D images obtained by synchrotron X-ray mCT andpermeability variations across strike-slip faults inporous rocks.|