Thrust Tectonics - Mcclay, K. R.

. .

Résumé :
K.R. McClay Department of Geology, Royal Holloway and Bedford New College, University of London, Egham, Surrey, England TW20 OEX. Since the first Thrust and Nappe Tectonics Conference in London in 1979 (McClay & Price 1981), and the Toulouse Meeting on Thrusting and Deformation in 1984 (Platt et al. 1986) there have been considerable advances in the study of thrust systems incorporating new field observations, conceptual models, mechanical models, analogue and numerical simulations, together with geophysical studies of thrust belts. Thrust Tectonics 1990 was an International Conference convened by the editor and held at Royal Holloway and Bedford New College, University of London, Egham Surrey, from April 4th until April 7th 1990. There were one hundred and seventy participants from all continents except South America. The conference was generously sponsored by Brasoil U.K. Limited, BP Exploration, Chevron U.K. Limited, Clyde Petroleum, Enterprise Oil, Esso Exploration and Production UK Limited, and Shell U.K. Exploration and Production. One hundred and five contributions were presented at the meeting, - seventy six oral presentations (together with poster displays) and an additional twenty nine posters without oral presentation (McClay 1990, conference abstract volume).

Biographie:
..

Sommaire:
Erosional control of active compressional orogens.- Dynamic and kinematic growth and change of a Coulomb wedge.- A developmental stage of a foreland belt.- One-dimensional models for plane and non-plane power-law flow in shortening and elongating thrust zones.- Centrifuge modelling of the propagation of thrust faults.- Physical models of thrust wedges.- Generation of curved fold-thrust belts: Insight from simple physical and analytical models.- Thrust faults in inverted extensional basins.- Rates of folding and faulting determined from growth strata.- Role of shear in fault-propagation folding.- 2-D reconstruction of thrust evolution using the fault-bend fold method.- Kinematic models of deformation at an oblique ramp.- Stress controls on fold thrust style.- Kinematics of large-scale asymmetric buckle folds in overthrust shear: an example from the Helvetic nappes.- Forelimb deformation in some natural examples of fault-propagation folds.- The geometric evolution of foreland thrust systems.- Some geometric problems of ramp-flat thrust models.- The duplex model: Implications from a study of flexural-slip duplexes.- Palaeomagnetic techniques applied to thrust belts.- Evolution of crystalline thrust sheets in the internal parts of mountain chains.- Evolution of a continental collision belt: ECORS-Pyrenees crustal balanced cross-section.- Thrusting and foreland basin evolution in the Southern Pyrenees.- South Pyrenean fold-and-thrust belt: Role of foreland evaporitic levels in thrust geometry.- Contrasting rotations within thrust sheets and kinematics of thrust tectonics as derived from palaeomagnetic data: an example from the Southern Pyrenees.- The Alps - a transpressive pile of peels.- Structural evolution of the western Chartreuse fold and thrust system, NW French Subalpine Chains.- Kinematics of a transverse zone in the Southern Alps, Italy.- Hangingwall geometry of overthrusts emanating from ductile decollements.- The Venetian Alps thrust belt.- Thrust geometries, interferences and rotations in the Northwest Himalaya.- Balanced and retrodeformed geological cross-section from the frontal Sulaiman Lobe, Pakistan: Duplex development in thick strata along the western margin of the Indian Plate.- The Monashee decollement of the southern Canadian Cordillera: a crustal-scale shear zone linking the Rocky Mountain Foreland belt to lower crust beneath accreted terranes.- The Skeena fold belt: a link between the Coast Plutonic Complex, the Omineca belt and the Rocky Mountain fold and thrust belt.- Geometric evidence for synchronous thrusting in the southern Alberta and northwest Montana thrust belts.- The analysis of fracture systems in subsurface thrust structures from the Foothills of the Canadian Rockies.- Thrust tectonics and Cretaceous intracontinental shortening in southeast Alaska.