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Temporal variation in counterclockwise vertical-axis block rotations across a rift overlap zone, southwestern Ethiopia, East Africa

Temporal variation in counterclockwise vertical-axis block rotations across a rift overlap zone, southwestern Ethiopia, East Africa

This is a Preprint and has not been peer reviewed. The published version of this Preprint is available: https://doi.org/10.1016/j.tecto.2024.230599. This is version 1 of this Preprint.

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Authors

Asfaw Erbello , G. Dupont-Nivet, Tesfaye Kidane, Norbert Nowaczyk, Masafumi Sudo, Daniel Melnick, Bodo Bookhagen, ...  more

Abstract

The southward propagation of the southern Main Ethiopian Rift (sMER) and the northward propagation of the Kenya Rift have generated the Broadly Rifted Zone (BRZ), a ~40-km-wide region of extensional overlap between the Chew Bahir Basin-Gofa Province and the sMER. However, the tectonic interaction between these propagating rifts is not well-understood. We present new paleomagnetic and geochronologic data from Eo–Oligocene (45–35 Ma) and Miocene (18–11 Ma) volcanic and sedimentary rocks from the BRZ. Rock magnetic, alternating field and thermal demagnetization experiments indicate simple titanomagnetite mineralogies carrying a characteristic re...  more

DOI

https://doi.org/10.31223/X5ZX4X

Subjects

Tectonics and Structure

Keywords

Broadly Rifted Zone, Rift overlap zone, Vertical axis counterclockwis block rotatione block rotation, Temporal variation

Dates

Published: 2024-12-19 00:15

Last Updated: 2024-12-19 08:12

License

CC BY Attribution 4.0 International

Additional Metadata

Conflict of interest statement:
The authors declare that there are no conflict of interest

Data Availability (Reason not available):
All the data supporting this research are available in the text and supplementary materials. The supplementary materials can be found at https://doi.org/ 10.5281/zenodo.12247088. Additional data can be found upon request to the corresponding author.