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 MorePostseismic Deformation of the 2009 L’Aquila Earthquake (M6.3) Surface Rupture Measured Using Repeat Terrestrial Laser Scanning
The tectono-geomorphic features of Apennine fault scarps mapped using combined ground penetrating radar and terrestrial laser scanning
Greater knowledge of the geomorphological setting of faults and consequently, more accurate paleoseismological interpretations can provide the framework for more reliable assessments of the long term seismic hazards posed by normal faults in the Apennines. Using combined ground penetrating radar (GPR) and terrestrial laser scanning (TLS) datasets we present a study of the tectono-geomorphic expression…
Read MoreStructure and Damage Patterns of a Seismic Fault Zone
Fault zone structure over a wide range of scales strongly influences earthquake mechanics. We present results from an ongoing project that aims to quantify the structure and fracture network characteristics of the seismic Gole Larghe Fault Zone (GLFZ) in the Italian Alps, exhumed from 8-10km depth. The GLFZ is c.500m thick and accommodates a total…
Read MoreFieldtrip 7: Virtual outcrop models of the Moab fault to assess the impact of normal drag on across-fault juxtapositions
The content of this Virtual Fieldtrip is available for download from: https://www.geolsoc.org.uk/pgc-electronic http://www2.geolsoc.org.uk/PGC7/Field/ http://www2.geolsoc.org.uk/PGC7/Field/FieldTrip7Imber.mp4
Read MoreFieldtrip 6: Multi-scale structural analogues: Arkitsa Fault virtual field trip
The content of this Virtual Fieldtrip are available for download from: https://www.geolsoc.org.uk/pgc-electronic http://www2.geolsoc.org.uk/PGC7/Field/ http://www2.geolsoc.org.uk/PGC7/Field/FieldTrip6Jones.mp4
Read MoreVirtual fieldtrips for petroleum geoscientists
Significant advances in geosciences data acquisition, visualization and analysis now allow highly detailed outcrop models to be constructed for a range of petroleum industry purposes. From a given field locality, a virtual outcrop is created from a centimetre-scale digital elevation model and colour photographs with geological information overlaid as appropriate. In a visualization environment, these…
Read MoreSurface roughness of ancient seismic faults exhumed from 10 km depths (Gole Larghe Fault, Italian Alps) characterized over five orders of magnitude
Fault surface roughness is a principal factor influencing earthquake mechanics, and particularly rupture initiation, propagation, and arrest, 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. The fault exploited pre-existing joints…
Read MoreCharacterising Fault Networks in Three Dimensions in the Lewisian Gneiss Complex, NW Scotland: Implications for Petroleum Potential in the Clair Field Basement, Faroe-Shetland Basin
Fractured crystalline basement rocks are increasingly a target for hydrocarbon exploration in the development of existing fields. In the Clair field that lies 75km west of the Shetland Isles, the primary clastic reservoirs of Devonian and Carboniferous age overlie and onlap fractured Lewisian basement. Fractures in the basement are thought to play a significant role…
Read MoreQuantifying the structure of an exhumed seismogenic fault zone using Differential GPS and Terrestrial Laser-Scanning
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. Here, we present preliminary results from an ongoing project that aims to use digital methodologies…
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