A5008832725- earthquake and tectonic studies
- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- Geochemistry and Geologic Mapping
- Geological formations and processes
- Seismic Imaging and Inversion Techniques
- Geological and Geophysical Studies
- Hydrocarbon exploration and reservoir analysis
- Geology and Paleoclimatology Research
- Hydraulic Fracturing and Reservoir Analysis
- Geological Modeling and Analysis
- Seismology and Earthquake Studies
- Geological Studies and Exploration
- Geological and Geophysical Studies Worldwide
- Geotechnical and Geomechanical Engineering
- Rock Mechanics and Modeling
- Drilling and Well Engineering
- Seismic Waves and Analysis
- Landslides and related hazards
- Paleontology and Stratigraphy of Fossils
- Methane Hydrates and Related Phenomena
- Tunneling and Rock Mechanics
- Earthquake Detection and Analysis
- Pleistocene-Era Hominins and Archaeology
- Mineral Processing and Grinding
Durham University
2016-2025
Geospatial Research (United Kingdom)
2017-2023
China University of Geosciences
2020
University of Hull
2020
Scottish Enterprise
2020
Scottish Universities Environmental Research Centre
2020
National Cancer Registry
2019
Kidney Health Australia
2019
Zhaotong University
2019
The University of Adelaide
2003
Abstract Transpression and transtension are strike-slip deformations that deviate from simple shear because of a component of, respectively, shortening or extension orthogonal to the deformation zone. These three-dimensional non-coaxial strains develop principally in response obliquely convergent divergent relative motions across plate boundary other crustal zones at various scales. The basic constant-volume strain model with vertical stretch can be modified allow for volume change, lateral...
In recent years conflicting models have been proposed for the late Caledonian closure of Iapetus ocean between Laurentia, Baltica and Avalonian terranes. Recently published structural stratigraphic evidence from Britain, Scandinavia, East Greenland Newfoundland is reviewed shows that Western Avalonia, Eastern Avalonia all docked sinistrally against Laurentia in Silurian. collided previously accreted Gander Dunnage arc terranes on Appalachian margin mid-Silurian time then shifted dextrally...
Reactivation involves the accommodation of geologically separable displacement events (intervals >1 Ma) along pre-existing structures. The definition a significant period quiescence is central to this phenomenological and duration interval chosen represents resolution limit reactivation criteria found in most ancient settings. In neotectonic environments, can be further defined as displacements structures that formed prior onset current tectonic regime. This mechanistic cannot always...
The development of affordable digital technologies that allow the collection and analysis georeferenced field data represents one most significant changes in field-based geoscientific study since invention geological map. Digital methods make it easier to re-use pre-existing (e.g. previous data, geophysical survey, satellite images) during renewed phases fieldwork. Increased spatial accuracy from laser positioning systems provides access geostatistical geospatial analyses can inform...
Abstract Intraplate strike-slip deformation belts are typically steeply-dipping structures that develop in both oceanic and continental lithosphere where they form some of the largest most spectacular discontinuities found on Earth. In modern ancient settings, intraplate strike slip major importance accommodating horizontal displacements additionally very persistent zones weakness substantially influence rheological behaviour over long time periods (up to 1 Ga or more). These provide a...
A seismically active low-angle normal fault is recognized at depth in the Northern Apennines, Italy, where recent exhumation has also exposed ancient examples surface, notably Zuccale on Elba. Field-based and microstructural studies of reveal that an initial phase pervasive cataclasis increased zone permeability, promoting influx CO 2 -rich hydrous fluids. This triggered low-grade alteration onset stress-induced dissolution–precipitation processes (e.g. pressure solution) as dominant...
Research Article| June 01, 2009 Development of interconnected talc networks and weakening continental low-angle normal faults Cristiano Collettini; Collettini 1Geologia Strutturale e Geofisica, Dipartimento di Scienze della Terra, Università degli Studi Perugia, Italy Search for other works by this author on: GSW Google Scholar Cecilia Viti; Viti 2Dipartimento Siena, Steven A.F. Smith; Smith 3Reactivation Group, Department Earth Sciences, University Durham, Durham DH13LE, UK *Current...
Earthquake nucleation is currently explained using rate and state stability analysis, which successfully models the behavior of laboratory simulated faults with constant thickness gouge layers. However, roughness widely observed on natural its influence earthquake little explored. Here we conduct frictional sliding experiments different granite samples at upper crustal conditions (30–200 MPa). We observe a wide range behaviors, from stable to stick slip, depending combination parameters...
Abstract The geological processes that create fluid storage capacity and connectivity in global fractured basement reservoirs are poorly understood compared to conventional hydrocarbon plays. Hosting potentially multibillion barrels of oil, the upfaulted Precambrian Rona Ridge, offshore west Shetland, UK, gives key insights into how such form. Oil presence is everywhere associated with sub-millimeter- meter-thickness mineralized fracture systems cutting both local preseal cover sequences....
Earthquakes are triggered when crustal deformation produces displacements along fault zones. The rock in these zones is found to be weaker than adjacent material, but what the mechanisms of this loss strength? In his Perspective, [Holdsworth][1] discusses how recent studies exposed ancient combined with laboratory analyses revealing that properties at grain scale can determine large behavior deformation. [1]: http://www.sciencemag.org/cgi/content/full/303/5655/181
The widely cited Sibson‐Scholz conceptual fault zone model suggests that seismically active, upper crustal brittle faults pass downward across a predominantly thermally controlled transition at 10–15 km depth into ductile shear zones in which deformation occurs by aseimic viscous creep. crustal‐scale Outer Hebrides Fault Zone (OHFZ) NW Scotland has been described as the type example of such continental zone. It cuts Precambrian basement gneisses and is deeply exhumed, allowing direct study...
Research Article| June 01, 1986 Caledonian ductile thrusting in a Precambrian metamorphic complex: The Moine of northwestern Scotland DAVID BARR; BARR 1British Geological Survey, 19 Grange Terrace, Edinburgh EH9 2LF, United Kingdom Search for other works by this author on: GSW Google Scholar ROBERT E. HOLDSWORTH; HOLDSWORTH 2Department Sciences, University Liverpool, Brownlow Street, Liverpool L69 3BX, ALAN M. ROBERTS Author and Article Information Publisher: Society America First Online: 01...