Accommodation of East African Rifting Across the Turkana Depression
Name
JGR Solid Earth - 2020 - Knappe - Accommodation of East African Rifting Across the Turkana Depression.pdf
Description
Published version
Size
6.28 MB
Format
Adobe PDF
Checksum (MD5)
9b8f7835c1c3c8ceb20c439a8b5446a5
Author(s)
Knappe, E
Bendick, R
Ebinger, C
Birhanu, Y
Lewi, E
Floyd, M
King, R
Kianji, G
Mariita, N
Temtime, T
Date Issued
February 12, 2020
Journal
Journal of Geophysical Research: Solid Earth
Publisher
American Geophysical Union
Citation
Knappe, E., Bendick, R., Ebinger, C., Birhanu, Y., Lewi, E., Floyd, M., et al. (2020). Accommodation of East African Rifting across the Turkana Depression. Journal of Geophysical Research: Solid Earth, 125, e2019JB018469.
Version
Final published version
Abstract
Geodetic observations in the Turkana Depression of southern Ethiopia and northern Kenya constrain the kinematic relay of extension from a single rift in Ethiopia to parallel rifts in Kenya and Uganda. Global Position System stations in the region record approximately 4.7 mm/year of total eastward extension, consistent with the ITRF14 Euler pole for Nubia‐Somalia angular velocity. Extension is partitioned into high strain rates on localized structures and lower strain rates in areas of elevated topography, as across the Ethiopian Plateau. Where high topography is absent, extension is relayed between the Main Ethiopian Rift and the Eastern Rift across the Turkana Depression exclusively through localized extension on and immediately east of Lake Turkana (up to 0.2 microstrain/year across Lake Turkana). The observed scaling and location of active extension in the Turkana Depression are inconsistent with mechanical models predicting distributed stretching due to either inherited lithospheric weakness or reactivated structures oblique to the present‐day extension direction.
MIT Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1029/2019jb018469
