Models of fracture orientation at oblique spreading centres
Models of fracture orientation at oblique spreading centres
Three models are proposed for the orientation of extensional faults and dykes at mid-ocean ridges based on their relationship to the ridge axis and the relative plate separation vector. These models predict four ridge geometries allowing them to be tested by orientation data from 17 different sites within the Earth's oceans. A transtensional model is shown to be generally applicable to the structure of mid-ocean ridges, with special conditions required for a departure from it. Spreading rate influences ridge geometry with intermediate and fast spreading ridges more likely to have an orthogonal spreading geometry, which is an end member case of the transtensional model
Mid-ocean ridges, structural geology, transtension, spreading centres, faults
185-189
Tuckwell, G.W.
ec2916b2-105c-45a0-b894-844c7097e993
Bull, J.M.
974037fd-544b-458f-98cc-ce8eca89e3c8
Sanderson, D.J.
5653bc11-b905-4985-8c16-c655b2170ba9
April 1996
Tuckwell, G.W.
ec2916b2-105c-45a0-b894-844c7097e993
Bull, J.M.
974037fd-544b-458f-98cc-ce8eca89e3c8
Sanderson, D.J.
5653bc11-b905-4985-8c16-c655b2170ba9
Tuckwell, G.W., Bull, J.M. and Sanderson, D.J.
(1996)
Models of fracture orientation at oblique spreading centres.
Journal of the Geological Society, 153 (2), .
(doi:10.1144/gsjgs.153.2.0185).
Abstract
Three models are proposed for the orientation of extensional faults and dykes at mid-ocean ridges based on their relationship to the ridge axis and the relative plate separation vector. These models predict four ridge geometries allowing them to be tested by orientation data from 17 different sites within the Earth's oceans. A transtensional model is shown to be generally applicable to the structure of mid-ocean ridges, with special conditions required for a departure from it. Spreading rate influences ridge geometry with intermediate and fast spreading ridges more likely to have an orthogonal spreading geometry, which is an end member case of the transtensional model
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Published date: April 1996
Keywords:
Mid-ocean ridges, structural geology, transtension, spreading centres, faults
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Local EPrints ID: 76144
URI: http://eprints.soton.ac.uk/id/eprint/76144
ISSN: 0016-7649
PURE UUID: f38342c1-fad2-4acb-a429-69bdf7b6cf6a
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Date deposited: 11 Mar 2010
Last modified: 14 Mar 2024 02:53
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Author:
G.W. Tuckwell
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