Paleomagnetic Study And Structural Mapping Of Dofan Magmatic Segment Of Northern Main Ethiopian Rift In Afar Ne Ethiopia

The paleomagnetic investigation was carried out on outcropping Dofan volcanic rocks, southern Afar, Main Ethiopian Rift. The aim of this paleomagnetic study was to quantify vertical axis crustal block rotation and identifying the potential magnetic minerals carrier the remanence of rock sampled. Structurally the area is characterized by intense Quaternary faulting and fracturing. Two sets of faults are mapped in the study area namely; NNE–SSW and N-S trending youngest rift faults and few NNW–SSE striking rift margin normal faults.rnA total of 26 paleomagnetic sites were sampled within the well exposed Dofan volcanic rocks (outcrop of basalt, ignimbrite and trachyte) for the first ever paleomagnetic investigations. After routine paleomagnetic sample collection and preparation procedures 170 specimens were subjected to stepwise progressive alternative field and thermal demagnetizations techniques. The careful directional analysis of individual specimens revealed one or two components of natural remanent magnetization (NRM) at the end of the demagnetization process as: 1) A pervasive overprint carried by low blocking temperature (

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