Evolution of Geological Structure in Micro- and Macro- Scales

About this book

An invaluable reference to geology students and those specialising in structural geology, presenting an overview of new concepts and theories in the field.

Contents

Part One: Fractures, faults, nappes. Hydraulic fractures and their implications regarding the state of stress in a sedimentary sequence during burial. Geometry and development of normal faults. Normal faulting and exhumation of metamorphic rocks in mountain belts. Evolution of salients in a fold-and-thrust belt: the effects of sedimentary basin geometry. Plunging fault propagation folds: a case study from the Bhutan Himalayas. Thermal variations along Moine thrust zone from illite crystallinity. Overthrust shear in mountain building. Imbricate thrust spacing: experimental and theoretical analysis. Part Two: Ductile shear zones. Practical analysis of general shear zones using the porphyroclast hyperbolic distribution method: an example from the Scandinavian Caledonides. Shear zones in foliated rocks: geometry and kinematics. Development of compressional and extensional structures during progressive ductile shearing, main central thrust zone, Lesser himachal Himalaya. Deformed lineation in ductile shear zones: a case study from the Proterozoic fold belt of Singhbhum, eastern India. Construction and prospective use of displacement difference vectors (DDV) in vertical sections across shear belts: outline of a new method. Part Three: Fabric. Crystal rotation and growth during grain flow in a deforming crystal mush. Strain and crystallographic fabric pattern in a folded calcite vein: the dependence on initial fabric. Volume loss and slaty cleavage development. Contrasting fabrics in deformed dykes and host rocks: natural examples and a simplified model. Part Four: Folds and superposed folds. A fold classification scheme based on a polar plot of inverse layer thickness. Modelling deformation partitioning in folds. Simple shear modification of chevron folds: implications for facing interpretation, strain analysis and deformation history. Sense of fold asymmetry in single-phase and superposed folding. Interpretation of regional fold interference structures in South East Norway based on the comparison with model experiments. Continuous and discontinuous events in orogenic deformation. Part Five: Basement structures. the geometry of a deformed unconformity in the Caledonides of North West Scotland. Tectonic evolution of deep crustal structures in the mid Proterozoic Albany-Fraser Orogen, Western Australia. Cryptic structural trends in basement revealed by Patterson diagrams: examples from the Scottish and Irish Caledonian Orogen.

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