Abstract
The volcanic stratigraphy and petrography of compositionally bimodal volcanic rocks in the Mekane Selam area were characterized by detailed field investigation, spatial and systematic sampling, and petrographic analysis. Three successions of basaltic rocks with rhyolitic and trachytic rock units at the top with a substantial volume of felsic pyroclastic deposits were categorized as the typical lithological formations in the study area. Volcanic rock types present in the study area include plagioclase phyric basalt, plagioclase-pyroxene phyric basalt, pyroxene-plagioclase phyric basalt, pyroxene-olivine phyric basalt, pyroxene phyric basalt, olivine phyric basalt, rhyolite, and trachyte from bottom to top. The basaltic rocks are composed of plagioclase, clinopyroxene, and olivine phenocrysts with minor Fe-Ti oxides (ilmenite and magnetites). The common phenocrysts of trachyte rocks are sanidine, plagioclase, Fe-Ti oxides, and minor hornblende and green pyroxenes (aegirine). Rhyolites contain quartz and sanidine phenocrysts.
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26 April 2024
A Correction to this paper has been published: https://doi.org/10.1007/s00445-024-01737-5
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Acknowledgements
First, I want to pay homage to the minister of education, Mekdela Amba University, and the geology department. My deepest gratitude also extends to Bahir Dar University, the School of Earth Science and Department of Geology. My thanks and acknowledgment also goes to the Ethiopian Geological Survey (EGS), for preparing the polished thin sections of the selected analyzed samples. Next to this, I would like to acknowledge my advisor Dr. Minyahl Teferi Desta for his valuable guidance and constructive comments. Last but not the least, the community of Mekane Selam area is greatly acknowledged by the author, since they have given me unforgettable and memorable treatment and support during my field study.
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The first author (Mr. Habtamu Alemu) was responsible for the data curation, formal analysis, field survey and investigation, methodology specification, software manipulation, and writing the draft and final editing.
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Alehegn, H.A. Volcano-stratigraphy and petrography of bimodal volcanic rocks suites of Mekane Selam area, northwestern Ethiopian volcanic plateau. Bull Volcanol 86, 19 (2024). https://doi.org/10.1007/s00445-024-01705-z
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DOI: https://doi.org/10.1007/s00445-024-01705-z