• Home
  • Fault slip behaviour controlled by incremental lithification in carbonates

Fault slip behaviour controlled by incremental lithification in carbonates

Evening Lecture

Fault slip behaviour controlled by incremental lithification in carbonates

Presenter – Helen Lacey, University of Leeds

The spectrum of fault slip behaviour ranges from aseismic ‘fault creep’ to ‘slow – slip’, where a fault slips over weeks to months, to seismic ‘stick – slip’, associated with destructive earthquakes. Despite their high societal and economic importance, the physical conditions that pre-dispose a fault to slip in these different ways are still poorly understood. Results from our hold – slide experiments on saturated carbonate gouges at different temperatures suggest that, within carbonate – rich zones, these different behaviours can be attributed to the stage of lithification achieved within the fault zone. SEM analyses show decreasing porosity, the production of carbonate nanograins, apparent crystal growth, and incremental grain aggregation associated with a transition from creep to long – duration instabilities to stick – slip type behaviour with increasing temperature. Such changes attributed to thermally – driven cementation and compaction leading to lithification of sediment could have significant implications for slow earthquakes.

Speakers

Helen Lacey

Tuesday, 17th October
6:30pm, The Geological Society

FREE ENTRY
Wine & Savouries included

Venue

The Geological Society
Burlington House
Piccadilly
London W1J 0BG

Our Sponsors

BP
Shell
Nexen
Gaia
Baker Hughes
Halliburton
Schlumberger
Tullow Oil
OPC
GE Oil & Gas
Weatherford Labs

Contacting LPS

External Relations

Brian Moss
VP External Liaison

Newsletters

Jenny Rastogi
VP Newsletter

Seminars

Joanne Tudge
VP Seminars

Technology

Dawn Houliston
VP Technology