Characterising fracture systems on the Isle of Lewis: An onshore analogue for the Clair Field
Exotic hydrocarbon reservoirs such as crystalline basement are increasingly a target for hydrocarbon exploration in the development of new and existing fields. The Clair field lies in the Faroe-Shetland basin with reservoirs in Devonian and Carboniferous sediments that overlie and onlap a basement high that was up-faulted during the Mesozoic. At Clair the basement is…
Read MoreInferring earthquake mechanics from exhumed faults
The spatial heterogeneity of fracture orientations in fault zones
The spatial heterogeneity of natural fracture networks in fault zones provides valuable information to understanding the evolution of fault systems. The damage zones and cores of many natural fault zones display complex geometric and kinematic patterns that are not easily explained by simple plane strain faulting models like those proposed by Anderson. In this presentation,…
Read MoreTo what extent do fracture arrays conform to Andersonian fault models?
Can we use lines of no finite elongation to predict the orientations of cataclastic deformation bands?
Cataclastic deformation bands typically form in high porosity sandstones adjacent to and ahead of through-going fault surfaces. As such, the orientations of cataclastic deformation bands may provide information about the geometry and magnitude of finite strains within the wall rocks surrounding larger faults. This information may in turn provide clues as to the geometry and…
Read MoreCharacterising Fracture Systems within the Lewisian Gneiss Complex, Northwest Scotland: an Onshore Analogue for the Clair Field?
Exotic hydrocarbon reservoirs such as crystalline basement are increasingly a target for hydrocarbon exploration in the development of new and existing fields. The Clair field lies in the Faroe-Shetland basin with reservoirs in Devonian and Carboniferous sediments that overlie and onlap a basement high that was up-faulted during the Mesozoic. At Clair the basement is…
Read MorePartitioned postseismic deformation associated with the 2009 Mw 6.3 L’Aquila earthquake surface rupture measured using a terrestrial laser scanner
Surface roughness of ancient seismic faults exhumed from seismogenic depths (Gole Larghe Fault, Italian Alps): a combined LIDAR and high-resolution photogrammetric analysis
Fault surface roughness is a principal factor influencing earthquake mechanics, however little data currently exists on fault surfaces at seismogenic depths. Here we investigate the roughness of slip surfaces from the seismogenic strike-slip Gole Larghe Fault Zone, exhumed from ca. 10 km depth and hosted in granitoid rocks of the Adamello batholith (Italian Alps). We…
Read MoreThe Structure of Seismogenic Faults in Crystalline Basement
Fault zone structure over a wide range of scales strongly influences earthquake mechanics, including the sites of earthquake nucleation and arrest, co-seismic strength and slip distribution, and the amount of energy expended during frictional heating and creation of wall-rock damage. The importance of multi-scale fault heterogeneity necessitates an integrated approach to understanding fault zone structure.…
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