EGU General Assembly 2007
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Tectonics and Structural Geology
Earthquake Phenomena
Ductile Deformation and Metamorphism
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Structural Inheritance and Reactivation
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  Information - TS9.1 The influence of pre-existing structures upon the development and evolution of geological architectures

Event Information
The global distribution of earthquakes shows that the Earth’s crust is dynamic and commonly deforms in broad, but diffuse tectonic plate margins, especially – but not exclusively – in the continents. The deformation/strain produced by tectonic processes is manifest in geological architectures, from rift basins and mountain belts to faults and folds, features that span at least 12 orders of magnitude length scale. These architectures play host to hydrocarbon accumulations, control the geometry of potential repositories for carbon and radioactive materials, and are a key component in a range of geological hazards that pose a significant threat to populated areas.
It is generally agreed that the generation and evolution of most geological architectures are primarily controlled by plate movement vectors and mechanical stratigraphy. However, it is also widely believed that previous geohistory and the presence of pre-existing mechanical heterogeneities are important secondary controls, especially in the brittle/ shallow crust. Such ‘structural inheritance’ is frequently invoked to explain complex architectures, but our understanding of the processes leading to reactivation and its influence over the kinematic and dynamic evolution of geological architectures at different scales is still very limited. This session brings together geophysicists, structural geologists, and modellers in order to develop a more integrated understanding of how structural inheritance influences the evolution of geological architectures in crustal deformation zones across a range of scales and tectonic environments. Studies from both surface and sub-surface settings are welcome and the enthusiastic participation of geoscientists from the petroleum industry is encouraged.

Convenors: Bob Holdsworth, Ken McCaffrey, Robert Wilson (Durham University), Amy Clifton (Nordic Volcanological Centre, Iceland) & Steffen Berg (University of Tromso)

Preliminary List of Solicited Speakers


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