Dike-induced contraction along oceanic and continental divergent plate boundaries
The axis of divergent plate boundaries shows extension fractures and normal faults at the surface. Here we present evidence of contraction along the axis of the oceanic ridge of Iceland and the continental Main Ethiopian Rift. Contraction is found at the base of the tilted hanging wall of dilational...
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Online Access: | http://hdl.handle.net/10754/347007 https://doi.org/10.1002/2014GL061570 |
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ftkingabdullahun:oai:repository.kaust.edu.sa:10754/347007 2023-12-31T10:08:19+01:00 Dike-induced contraction along oceanic and continental divergent plate boundaries Trippanera, D. Acocella, V. Ruch, Joel King Abdullah University of Science and Technology (KAUST) Physical Science and Engineering (PSE) Division Dipartimento di Scienze; Università Roma Tre; Rome Italy 2014-10-24 application/pdf http://hdl.handle.net/10754/347007 https://doi.org/10.1002/2014GL061570 unknown American Geophysical Union (AGU) http://doi.wiley.com/10.1002/2014GL061570 Dike-induced contraction along oceanic and continental divergent plate boundaries 2014, 41 (20):7098 Geophysical Research Letters doi:10.1002/2014GL061570 00948276 Geophysical Research Letters http://hdl.handle.net/10754/347007 Archived with thanks to Geophysical Research Letters. ©2014. American Geophysical Union. All Rights Reserved. Article 2014 ftkingabdullahun https://doi.org/10.1002/2014GL061570 2023-12-02T20:20:51Z The axis of divergent plate boundaries shows extension fractures and normal faults at the surface. Here we present evidence of contraction along the axis of the oceanic ridge of Iceland and the continental Main Ethiopian Rift. Contraction is found at the base of the tilted hanging wall of dilational normal faults, balancing part of their extension. Our experiments suggest that these structures result from dike emplacement. Multiple dike injection induces subsidence above and uplift to the sides of the dikes; the transition in between is accommodated by reverse faults and subsequent peripheral inward dipping normal faults. Our results suggest that contraction is a direct product of magma emplacement along divergent plate boundaries, at various scales, marking a precise evolutionary stage and initiating part of the extensional structures (extension fractures and normal faults). Key Points Contraction along divergent plate boundaries results from dike emplacementContraction generates extensional structures along divergent plate boundariesSurface deformation along divergent plate boundaries may be magma induced Article in Journal/Newspaper Iceland King Abdullah University of Science and Technology: KAUST Repository Geophysical Research Letters 41 20 7098 7104 |
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Open Polar |
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King Abdullah University of Science and Technology: KAUST Repository |
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ftkingabdullahun |
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description |
The axis of divergent plate boundaries shows extension fractures and normal faults at the surface. Here we present evidence of contraction along the axis of the oceanic ridge of Iceland and the continental Main Ethiopian Rift. Contraction is found at the base of the tilted hanging wall of dilational normal faults, balancing part of their extension. Our experiments suggest that these structures result from dike emplacement. Multiple dike injection induces subsidence above and uplift to the sides of the dikes; the transition in between is accommodated by reverse faults and subsequent peripheral inward dipping normal faults. Our results suggest that contraction is a direct product of magma emplacement along divergent plate boundaries, at various scales, marking a precise evolutionary stage and initiating part of the extensional structures (extension fractures and normal faults). Key Points Contraction along divergent plate boundaries results from dike emplacementContraction generates extensional structures along divergent plate boundariesSurface deformation along divergent plate boundaries may be magma induced |
author2 |
King Abdullah University of Science and Technology (KAUST) Physical Science and Engineering (PSE) Division Dipartimento di Scienze; Università Roma Tre; Rome Italy |
format |
Article in Journal/Newspaper |
author |
Trippanera, D. Acocella, V. Ruch, Joel |
spellingShingle |
Trippanera, D. Acocella, V. Ruch, Joel Dike-induced contraction along oceanic and continental divergent plate boundaries |
author_facet |
Trippanera, D. Acocella, V. Ruch, Joel |
author_sort |
Trippanera, D. |
title |
Dike-induced contraction along oceanic and continental divergent plate boundaries |
title_short |
Dike-induced contraction along oceanic and continental divergent plate boundaries |
title_full |
Dike-induced contraction along oceanic and continental divergent plate boundaries |
title_fullStr |
Dike-induced contraction along oceanic and continental divergent plate boundaries |
title_full_unstemmed |
Dike-induced contraction along oceanic and continental divergent plate boundaries |
title_sort |
dike-induced contraction along oceanic and continental divergent plate boundaries |
publisher |
American Geophysical Union (AGU) |
publishDate |
2014 |
url |
http://hdl.handle.net/10754/347007 https://doi.org/10.1002/2014GL061570 |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
http://doi.wiley.com/10.1002/2014GL061570 Dike-induced contraction along oceanic and continental divergent plate boundaries 2014, 41 (20):7098 Geophysical Research Letters doi:10.1002/2014GL061570 00948276 Geophysical Research Letters http://hdl.handle.net/10754/347007 |
op_rights |
Archived with thanks to Geophysical Research Letters. ©2014. American Geophysical Union. All Rights Reserved. |
op_doi |
https://doi.org/10.1002/2014GL061570 |
container_title |
Geophysical Research Letters |
container_volume |
41 |
container_issue |
20 |
container_start_page |
7098 |
op_container_end_page |
7104 |
_version_ |
1786840996521181184 |