Journal articles
Strain accommodation by slow slip and dyking in a youthful continental rift, East Africa
Eric Calais
1, *
Nicolas d'Oreye
2
Julie Albaric
3
Anne Deschamps
4
Damien Delvaux
5
Jacques Déverchère
3
Cynthia Ebinger
6
Richard W. Ferdinand
7
Francois Kervyn
5
Athanas S. Macheyeki
8, 9
Anneleen Oyen
2, 10
Julie Perrot
3
Elifuraha Saria
11
Benoit Smets
5
D. Sarah Stamps
1
Christelle Wauthier
5, 12
*
Corresponding author
Eric Calais 1
Correspondent author
Nicolas d'Oreye 2
Author
Julie Albaric 3
Author
Anne Deschamps 4
Author IdHAL : anne-deschamps ORCID : https://orcid.org/0000-0002-6209-9814
Damien Delvaux 5
Author
Jacques Déverchère 3
Author IdHAL : jacques-deverchere ORCID : https://orcid.org/0000-0001-5138-7821
Cynthia Ebinger 6
Author
Richard W. Ferdinand 7
Author
Francois Kervyn 5
Author
Athanas S. Macheyeki 8, 9
Author
Anneleen Oyen 2, 10
Author
Julie Perrot 3
Author
Elifuraha Saria 11
Author
Benoit Smets 5
Author
D. Sarah Stamps 1
Author
Christelle Wauthier 5, 12
Author
1
Department of Earth and Atmospheric Sciences [West Lafayette] (550 Stadium Mall Drive, West Lafayette, IN 47907 - United States)
- Purdue University [West Lafayette] (Hovde Hall, 610 Purdue Mall, West Lafayette, IN 47907 - United States)
2
Department of Geophysics/Astrophysics (L-2160 - Luxembourg)
- National Museum of Natural History [Luxembourg] (24, rue Münster, L-2160 Luxembourg - Luxembourg)
3
LDO - Domaines Océaniques (Technopôle Brest-Iroise, Place Copernic, 29280 Plouzané - France)
- CNRS - Centre National de la Recherche Scientifique : UMR6538 (France)
- Institut d'écologie et environnement (France)
- Observatoire des Sciences de l'Univers (France)
- UBO - Université de Brest (Université de Bretagne Occidentale - 3 Rue des Archives 29238, Brest - France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
4
GEOAZUR 6526 - Géoazur (Bât 4, 250 rue Albert Einstein Les Lucioles 1, Sophia Antipolis 06560 VALBONNE - France)
- Observatoire de la Côte d'Azur (France)
- UCA - Université Côte d'Azur (Parc Valrose, 28 avenue Valrose 06108 Nice Cedex 2 - France)
- COMUE UCA - COMUE Université Côte d'Azur (2015 - 2019) (Parc Valrose, 28 avenue Valrose 06108 Nice Cedex 2 - France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- UNS - Université Nice Sophia Antipolis (... - 2019) (Parc Valrose - BP 2135 - 06103 Nice cedex 2 - France)
- COMUE UCA - COMUE Université Côte d'Azur (2015 - 2019) (Parc Valrose, 28 avenue Valrose 06108 Nice Cedex 2 - France)
- UPMC - Université Pierre et Marie Curie - Paris 6 (4 place Jussieu - 75005 Paris - France)
- IRD - Institut de Recherche pour le Développement : UR082 (Siège Le Sextant 44, bd de Dunkerque CS 90009 13572 Marseille cedex 02 - France)
- CNRS - Centre National de la Recherche Scientifique : UMR6526 (France)
5
RMCA - Royal Museum for Central Africa [Tervuren] (Leuvensesteenweg 13 - 3080 Tervuren - Belgium)
6
Department of Earth and Environmental Sciences [Rochester] (P.O. Box 270221 , Rochester, NY 14627 - United States)
- University of Rochester [USA] (Rochester, NY - United States)
7
Department of Geology (PO Box 35091 Dar Es Salaam - Tanzania)
- UDSM - University of Dar es Salaam (P.O. Box 35091 - Dar Es Salaam - Tanzania)
8
Department of Geology and Soil Science (Universteit Gent, Gent 9000 - Belgium)
- Renard Centre of Marine Geology (France)
9
Mineral Resource (Madini) Institute (PO Box 903 Dodoma - Tanzania)
- Mineral Resource (Madini) Institute (France)
10
TU Delft - Delft University of Technology (Postbus 5 2600 AA Delft - Netherlands)
12
Université de Liège (Place du 20-Août, 7 4000 Liège - Belgium)
Abstract : Continental rifts begin and develop through repeated episodes of faulting and magmatism, but strain partitioning between faulting and magmatism during discrete rifting episodes remains poorly documented. In highly evolved rifts, tensile stresses from far-field plate motions accumulate over decades before being released during relatively short time intervals by faulting and magmatic intrusions1, 2, 3. These rifting crises are rarely observed in thick lithosphere during the initial stages of rifting. Here we show that most of the strain during the July–August 2007 seismic crisis in the weakly extended Natron rift, Tanzania, was released aseismically. Deformation was achieved by slow slip on a normal fault that promoted subsequent dyke intrusion by stress unclamping. This event provides compelling evidence for strain accommodation by magma intrusion, in addition to slip along normal faults, during the initial stages of continental rifting and before significant crustal thinning.
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Journal articles
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https://hal-insu.archives-ouvertes.fr/insu-00346693
Contributor : Adminhal Univbrestbu Connect in order to contact the contributor
Submitted on : Friday, December 12, 2008 - 10:32:24 AM
Last modification on : Monday, October 11, 2021 - 2:22:46 PM
Contributor : Adminhal Univbrestbu Connect in order to contact the contributor
Submitted on : Friday, December 12, 2008 - 10:32:24 AM
Last modification on : Monday, October 11, 2021 - 2:22:46 PM
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- HAL Id : insu-00346693, version 1
- DOI : 10.1038/nature07478
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INSU | UNICE | CNRS | UNIV-BREST | GEOAZUR | OCA | UPMC | LGO | CMM | UNIV-COTEDAZUR | SORBONNE-UNIVERSITE | SU-TI
Citation
Eric Calais, Nicolas d'Oreye, Julie Albaric, Anne Deschamps, Damien Delvaux, et al.. Strain accommodation by slow slip and dyking in a youthful continental rift, East Africa. Nature, Nature Publishing Group, 2008, 456, pp.783-787. ⟨10.1038/nature07478⟩. ⟨insu-00346693⟩
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