Lithospheric strength and strain localization in continental extension from observations of the East African Rift

L. Kogan, S. Fisseha, R. Bendick, R. Reilinger, S. McClusky, R. King, T. Solomon

Research output: Contribution to journalArticlepeer-review

92 Scopus citations

Abstract

GPS observations along three profiles across the Ethiopian Rift and Afar triple junction record differences in the length scale over which extension is accommodated. In the Afar region, where the mantle lithosphere is nearly or entirely absent, measurable extension occurs over ∼175 km; in the northern Ethiopian Rift, where the mantle lithosphere is anomalously thin and hot, extensional strain occurs over ∼85 km, extending beyond the structural rift valley; in the southern Ethiopian Rift, where the mantle lithosphere approaches standard continental thickness, extensional strain occurs over <10 km. This trend of increasingly distributed deformation contrasts with the standard model where continental rifts become mid-ocean spreading centers through strain localization.

Original languageEnglish
Article numberB03402
JournalJournal of Geophysical Research: Solid Earth
Volume117
Issue number3
DOIs
StatePublished - Mar 1 2012

Fingerprint

Dive into the research topics of 'Lithospheric strength and strain localization in continental extension from observations of the East African Rift'. Together they form a unique fingerprint.

Cite this