THE ROLE OF MECHANICAL STRATIGRAPHY IN CONTROLLING THE NUCLEATION AND PROPAGATION OF BRITTLE STRU...
The project aims at investigating how the remarkable mechanical stratigraphy typical of lithologically heterogeneous turbiditic sequences affects the nucleation and propagation of brittle features such as faults and fractures. The study will focus on the Marnoso Arernacea formation of the northern Apennines, a turbiditic package characterized by dramatic competence contrasts reflecting the sandy and marly/clayish nature of the beds forming the rock. Preliminary field work shows a spectacular refraction of the fracture and fault planes across bed-bed interfaces, wherein faults have a much steeper planar attitude when crossing the sandy beds and are entirely dilational and much flatter planar attitude and exhibit a shear character when they cross the clay-rich beds.
The study will be integrated with rock mechanics experiments aimed at determining the physical properties of the affected lithologies and by numerical modelling to better constrain the processes at play.
This job comes from a partnership with Science Magazine and