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- W3022866477 abstract "Abstract The Afar region in East Africa represents a key location to study continental breakup. We present an integrated structural analysis of the Western Afar Margin (WAM) aiming to better understand rifted margin development and the role of plate rotation during rifting. New structural information from remote sensing, fieldwork, and earthquake data sets reveals that the N‐S striking WAM is still actively deforming and is characterized by NNW‐SSE normal faulting as well as a series of marginal grabens. Seismicity distribution analysis and the first‐ever borehole‐calibrated sections of this developing passive margin show recent slip concentrated along antithetic faults. Tectonic stress parameters derived from earthquake focal mechanisms reveal different extension directions along the WAM (82°N), in Afar (66°N) and in the Main Ethiopian Rift (108°N). Fault slip analysis along the WAM yields the same extension direction. Combined with GPS data, this shows that current tectonics in Afar is dominated by the local rotation of the Danakil Block, considered to have occurred since 11 Ma. Earlier stages of Afar development (since 31–25 Ma) were most likely related to the large‐scale rotation of the Arabian plate. Various authors have proposed scenarios for the evolution of the WAM. Any complete model should consider, among other factors, the multiphase tectonic history and antithetic fault activity of the margin. The findings of this study are not only relevant for a better understanding of the WAM but also provide insights into the role of multiphase rotational extension during rifting and passive margin formation in general." @default.
- W3022866477 created "2020-05-13" @default.
- W3022866477 creator A5010387302 @default.
- W3022866477 creator A5016678837 @default.
- W3022866477 creator A5038387955 @default.
- W3022866477 creator A5046422823 @default.
- W3022866477 creator A5049936873 @default.
- W3022866477 creator A5061053990 @default.
- W3022866477 creator A5084671680 @default.
- W3022866477 date "2020-07-01" @default.
- W3022866477 modified "2023-10-14" @default.
- W3022866477 title "Structural Analysis of the Western Afar Margin, East Africa: Evidence for Multiphase Rotational Rifting" @default.
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