The forces driving the plates; constraints from kinematics and stress observations

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Authors:Jurdy, Donna M.; Stefanick, Michael
Author Affiliations:Primary:
Northwest. Univ., Dep. Geol. Sci., Evanston, IL, United States
Other:
Univ. Durham, United Kingdom
Univ. Liverpool, United Kingdom
Sci. Syst. and Appl., United States
Volume Title:Tectonic stress in the lithosphere
Volume Authors:Whitmarsh, R. B., editor; Bott, M. H. P.; Fairhead, J. D.; Kusznir, N. J.
Source:Philosophical Transactions of the Royal Society of London, Series A: Mathematical and Physical Sciences, 337(1645), p.127-139; A Royal Society discussion meeting ; Tectonic stress in the lithosphere, London, United Kingdom, Apr. 10-11, 1991, edited by R. B. Whitmarsh, M. H. P. Bott, J. D. Fairhead and N. J. Kusznir. Publisher: Royal Society of London, London, United Kingdom. ISSN: 0080-4614
Publication Date:1991
Note:In English. With discussion. 23 refs.; illus. incl. 1 table, sketch maps
Summary:Dynamical equilibrium for an oceanic plate determines the relative magnitudes of the active and responding forces, largely balancing drag against slab-pull. Continental plates have errors of approx 30% of the estimated motions. A torque balance model describes the evolution of plate dynamics over the Cainozoic era. Torques have been relatively stable over the past 64 m.y. Unlike kinematics, the stress field responds locally and can differentiate between models of forces acting on a plate. Stress models incorporating these forces are compared with stress orientations for the N and S American plates. [R.K.H.]
Subjects:Equations; Interpretation; Kinematics; Mechanics; Mechanism; Plate tectonics; Stress
Abstract Numbers:92M/2332
Record ID:1992003418
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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