Journal article
Tectonothermal Evolution of the Broadly Rifted Zone, Ethiopian Rift
SC Boone, ML Balestrieri, BP Kohn, G Corti, AJW Gleadow, C Seiler
Tectonics | AMER GEOPHYSICAL UNION | Published : 2019
DOI: 10.1029/2018TC005210
Abstract
The Broadly Rifted Zone (BRZ) of southern Ethiopia is a long-lived and structurally complex segment of the East African Rift System. However, due to poor surface exposure of early synrift strata and a dearth of subsurface data, the evolution of the BRZ remains poorly understood. We present new apatite (U-Th-Sm)/He and augmented apatite fission track low-temperature thermochronology data from the Beto and Galana basin boundary fault systems to constrain the tectonothermal evolution of the western and eastern BRZ, respectively. Time-temperature reconstructions suggest that East African Rift System-related extension began concurrently across the BRZ in the early Miocene (20–17 Ma), at least 6 M..
View full abstractGrants
Awarded by Australian Research Council
Funding Acknowledgements
We note that there are no data sharing issues. All numerical information is provided in the tables. Funding for this research was provided through Australian Research Council grant DP130101610. S. C. B. received additional support from the MIFRS and MIRS scholarships and the Baragwanath Geology Research Scholarship awarded by the University of Melbourne. The University of Melbourne Thermochronology Lab receives infrastructure support under the AuScope program of the Australian National Collaborative Research Infrastructure Strategy (NCRIS). Technical assistance provided by Abaz Alimanovic for (U-Th)/He analyses are greatly appreciated. The article benefited from the suggestions provided by Peter van der Beek and Manfred Strecker and constructive reviews from John Geissman and Christopher Morley.