All Outputs (4)

Stress fields of ancient seismicity recorded in the dynamic geometry of pseudotachylyte in the Outer Hebrides Fault Zone, UK (2020)
Journal Article
Campbell, L., Lloyd, G., Phillips, R., Walcott, R., & Holdsworth, R. (2021). Stress fields of ancient seismicity recorded in the dynamic geometry of pseudotachylyte in the Outer Hebrides Fault Zone, UK. Journal of the Geological Society, 178(1), Article jgs2020-101. https://doi.org/10.1144/jgs2020-101

Heterogeneous sequences of exhumed fault rocks preserve a record of the long-term evolution of fault strength and deformation behaviour during prolonged tectonic activity. Along the Outer Hebrides Fault Zone (OHFZ) in NW Scotland, numerous pseudotach... Read More about Stress fields of ancient seismicity recorded in the dynamic geometry of pseudotachylyte in the Outer Hebrides Fault Zone, UK.

The Nusfjord exhumed earthquake source (Lofoten, Norway): deep crustal seismicity driven by bending of the lower plate during continental collision (2020)
Presentation / Conference Contribution
Menegon, L., Campbell, L., Fagereng, Å., & Pennacchioni, G. (2020). The Nusfjord exhumed earthquake source (Lofoten, Norway): deep crustal seismicity driven by bending of the lower plate during continental collision. In EGU General Assembly 2020. https://doi.org/10.5194/egusphere-egu2020-7129

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 (2020)
Presentation / Conference Contribution
Campbell, L., & Menegon, L. (2020). Pyroxene low-temperature plasticity and fragmentation as a record of seismic stress evolution in the lower crust. In EGU General Assembly 2020. https://doi.org/10.5194/egusphere-egu2020-7380

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.

Earthquake nucleation in the lower crust by local stress amplification (2020)
Journal Article
Campbell, L. R., Menegon, L., Fagereng, Å., & Pennacchioni, G. (2020). Earthquake nucleation in the lower crust by local stress amplification. Nature communications, 11(1), Article 1322. https://doi.org/10.1038/s41467-020-15150-x

Deep intracontinental earthquakes are poorly understood, despite their potential to cause significant destruction. Although lower crustal strength is currently a topic of debate, dry lower continental crust may be strong under high-grade conditions.... Read More about Earthquake nucleation in the lower crust by local stress amplification.