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Dike-fault interaction during the 2004 Dallol intrusion at the northern edge of the Erta Ale Ridge (Afar, Ethiopia)
| Content Provider | Semantic Scholar |
|---|---|
| Author | Nobile, Adriano Pagli, Carolina Keir, Derek Wright, Tim J. Ayele, Atalay Ruch, Joel Acocella, Valerio |
| Copyright Year | 2012 |
| Abstract | Received 17 July 2012; revised 29 August 2012; accepted 4 September 2012; published 12 October 2012. [1] During continental rifting the interaction between faulting and magmatic intrusions is not well understood. Using InSAR and seismicity, we show that a 0.06 km 3 dike was intruded along the Dallol segment, Ethiopia and was accompanied by a Mw 5.5 earthquake and associated fault slip along the western flank of the rift. The intrusion was fed by a previously unidentified magma chamber under Dallol. The total seismic moment release was 2.3 10 17 Nm, 10% of the geodetic moment. This is a higher proportion than during the 2005–2009 Dabbahu rifting episode, which ranged between 1–4% of the geodetic moment. A larger component of faulting occurs at Dallol than at Dabbahu segment, a feature we interpret to be related to the proximity (10 km) of the Dallol segment to the rift margin, where welldeveloped faults facilitate slip. Citation: Nobile, A., C. Pagli, D. Keir, T. J. Wright, A. Ayele, J. Ruch, and V. Acocella (2012), Dike-fault interaction during the 2004 Dallol intrusion at the northern edge of the Erta Ale Ridge (Afar, Ethiopia), Geophys. Res. Lett., 39, L19305, doi:10.1029/2012GL053152. |
| File Format | PDF HTM / HTML |
| DOI | 10.1029/2012GL053152 |
| Volume Number | 39 |
| Alternate Webpage(s) | http://www.see.leeds.ac.uk/afar/new-afar/results-publications/papers/Dike-fault.pdf |
| Alternate Webpage(s) | https://flore.unifi.it/retrieve/handle/2158/1110072/291374/Nobile_et_al-2012-Geophysical_Research_Letters.pdf |
| Alternate Webpage(s) | https://doi.org/10.1029/2012GL053152 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
