Sublithospheric loading and plate-boundary forces

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Authors:Bott, M. H. P.
Author Affiliations:Primary:
Univ. Durham, Dep. Geol. Sci., Durham, United Kingdom
Other:
Univ. Durham, United Kingdom
Univ. Liverpool, United Kingdom
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.83-93; 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. 18 refs.; illus. incl. sects.
Summary:This examines how sublithospheric loading produces tectonic stress in the strong upper lithosphere, and how such stress systems can give rise to plate-boundary forces. Models of such loading are studied by finite- element analysis. The maximum loading stress produced by a single load increases with its width towards the theoretical density-moment function value, but is almost independent of depth for a narrow load. If the lithospheric stress due to loading is crossed by a zone or plane of weakness, then plate-boundary tractions develop on adjacent plates due to the redistribution of stress. By modelling, ridge push, slab pull and trench suction can be explained in this way. [R.K.H.]
Subjects:Anomalies; Interpretation; Loading; Mechanics; Mechanism; Plate boundaries; Plate tectonics; Stress; Two-dimensional models
Abstract Numbers:92M/2329
Record ID:1992003415
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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