Articles | Volume 15, issue 7
https://doi.org/10.5194/se-15-747-2024
https://doi.org/10.5194/se-15-747-2024
Research article
 | 
05 Jul 2024
Research article |  | 05 Jul 2024

Propagating rifts: the roles of crustal damage and ascending mantle fluids

Folarin Kolawole and Rasheed Ajala

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Short summary
We investigate the upper-crustal structure of the Rukwa–Tanganyika rift zone in East Africa, where the Tanganyika rift interacts with the Rukwa and Mweru-Wantipa rifts, coinciding with abundant seismicity at the rift tips. Seismic velocity structure and patterns of seismicity clustering reveal zones around 10 km deep with anomalously high Vp / Vs ratios at the rift tips, indicative of a localized mechanically weakened crust caused by mantle volatiles and damage associated with bending strain.