All Outputs (2)

The Nusfjord exhumed earthquake source (Lofoten, Norway): deep crustal seismicity driven by bending of the lower plate during continental collision
Presentation / Conference Contribution
Menegon, L., Campbell, L., Fagereng, Å., & Pennacchioni, G. (2020, May). The Nusfjord exhumed earthquake source (Lofoten, Norway): deep crustal seismicity driven by bending of the lower plate during continental collision. Presented at European Geosciences Union (EGU) General Assembly 2020, Online

The origin of earthquakes in the lower crust at depth of 20-40 km, where dominantly ductile deformation is expected, is highly debated. Exhumed networks of lower crustal coeval pseudotachylytes (quenched frictional melt produced during seismic slip)... Read More about The Nusfjord exhumed earthquake source (Lofoten, Norway): deep crustal seismicity driven by bending of the lower plate during continental collision.

Pyroxene low-temperature plasticity and fragmentation as a record of seismic stress evolution in the lower crust
Presentation / Conference Contribution
Campbell, L., & Menegon, L. (2020, May). Pyroxene low-temperature plasticity and fragmentation as a record of seismic stress evolution in the lower crust. Presented at European Geosciences Union General Assembly 202, Online

Seismic rupture of the lower continental crust requires a high failure stress, given large lithostatic stresses and potentially strong rheologies. Several mechanisms have been proposed to generate high stresses at depth, including local amplification... Read More about Pyroxene low-temperature plasticity and fragmentation as a record of seismic stress evolution in the lower crust.