Search Results - "Ayalew, D"

Magma Evolution During Main‐Phase Continental Flood Basalt Volcanism: A Case for Recharge‐Evacuation‐Assimilation‐Fractional Crystallization in the Ethiopian Low‐Ti Province by Krans, S. R., Rooney, T. O., Kappelman, J. W., Yirgu, G., Ayalew, D.

“…Lavas erupted in Continental Flood Basalt (CFB) provinces are not primary magmas; they are differentiated products that result from large volumes of melt…”
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Unveiling hydrological dynamics in data-scarce regions: experiences from the Ethiopian Rift Valley Lakes Basin by Ayalew, Ayenew D, Wagner, Paul D, Sahlu, Dejene, Fohrer, Nicola

“…The hydrological system of the Rift Valley Lakes in Ethiopia has recently experienced changes over the past 2 decades. Potential causes for these changes…”
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Sulfur degassing at Erta Ale (Ethiopia) and Masaya (Nicaragua) volcanoes: Implications for degassing processes and oxygen fugacities of basaltic systems by J. M. deMoor, T. P. Fischer, Z. D. Sharp, P. L. King, M. Wilke, R. E. Botcharnikov, E. Cottrell, M. Zelenski, B. Marty, K. Klimm, C. Rivard, D. Ayalew, C. Ramirez, K. A. Kelley

“…We investigate the relationship between sulfur and oxygen fugacity at Erta Ale and Masaya volcanoes. Oxygen fugacity was assessed utilizing Fe3+/∑Fe and major…”
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From initiation to termination: a petrostratigraphic tour of the Ethiopian Low-Ti Flood Basalt Province by Krans, S. R., Rooney, T. O., Kappelman, J., Yirgu, G., Ayalew, D.

“…Continental flood basalts (CFBs), thought to preserve the magmatic record of an impinging mantle plume head, offer spatial and temporal insights into melt…”
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Identification of hydrologically homogenous watersheds and climate-vegetation dynamics in the Blue Nile Basin of Ethiopia by Mihret, Temesgen Tsehayeneh, Zemale, Fasikaw A., Worqlul, Abeyou W., Ayalew, Ayenew D., Fohrer, Nicola

“…Abstract Identification of hydrologically homogenous watersheds in the Upper Blue Nile Basin of Ethiopia is challenging due to the large number of watersheds…”
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Trace element systematics and Nd, Sr and Pb isotopes of Pliocene flood basalt magmas (Ethiopian rift): A case for Afar plume-lithosphere interaction by Ayalew, D., Jung, S., Romer, R.L., Garbe-Schönberg, D.

“…We present high-precision trace element and Sr-Nd-Pb isotope data for Pliocene flood basalts located at Sire (eastern rift wall) and Chefe Donsa (western rift…”
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Petrogenesis and origin of modern Ethiopian rift basalts: Constraints from isotope and trace element geochemistry by Ayalew, D., Jung, S., Romer, R.L., Kersten, F., Pfänder, J.A., Garbe-Schönberg, D.

“…The source of continental rift-related basalts and their relation to rifting processes is a continuous matter of debate. We present major and trace element and…”
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Relationships between Mafic and Peralkaline Silicic Magmatism in Continental Rift Settings: a Petrological, Geochemical and Isotopic Study of the Gedemsa Volcano, Central Ethiopian Rift by PECCERILLO, A., BARBERIO, M. R., YIRGU, G., AYALEW, D., BARBIERI, M., WU, T. W.

“…Petrological and geochemical data are reported for basalts and silicic peralkaline rocks from the Quaternary Gedemsa volcano, northern Ethiopian rift, with the…”
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The Red Beds series in the Erta Ale segment, North Afar. Evidence for a 6 Ma-old post-rift basin prior to continental rupturing by Le Gall, B., Leleu, S., Pik, R., Jourdan, F., Chazot, G., Ayalew, D., Yirgu, G., Cloquet, C., Chauvet, F.

“…The Erta Ale rift segment, North Afar, is regarded as the most mature rift part within the entire Afar rift system. Very little is known about its deformation…”
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Genesis and evolution of mafic and felsic magmas at Quaternary volcanoes within the Main Ethiopian Rift: Insights from Gedemsa and Fanta 'Ale complexes by Giordano, F., D'Antonio, M., Civetta, L., Tonarini, S., Orsi, G., Ayalew, D., Yirgu, G., Dell'Erba, F., Di Vito, M.A., Isaia, R.

“…This paper presents the results of an investigation carried out on young volcanic rocks from the Gedemsa and Fanta 'Ale complexes, located in the Main…”
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Magmatic cycles pace tectonic and morphological expression of rifting (Afar depression, Ethiopia) by Medynski, S., Pik, R., Burnard, P., Dumont, S., Grandin, R., Williams, A., Blard, P.-H., Schimmelpfennig, I., Vye-Brown, C., France, L., Ayalew, D., Benedetti, L., Yirgu, G.

“…The existence of narrow axial volcanic zones of mid-oceanic ridges testifies of the underlying concentration of both melt distribution and tectonic strain. As…”
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Quaternary faulting and volcanism in the Main Ethiopian Rift by Abebe, B., Acocella, V., Korme, T., Ayalew, D.

“…The Main Ethiopian Rift (MER) is associated with bimodal Quaternary magmatism. Field, remote sensing, and geochronology data are used to examine the…”
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Structure of the Ethiopian lithosphere: Xenolith evidence in the Main Ethiopian Rift by Rooney, Tyrone O., Furman, Tanya, Yirgu, Gezahegn, Ayalew, Dereje

“…The lithospheric and sublithospheric processes associated with the transition from continental to oceanic magmatism during continental rifting are poorly…”
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Cryptosporidium and Giardia infection and drinking water sources among children in Lege Dini, Ethiopia by Ayalew, D, Boelee, E, Endeshaw, T, Petros, B

“…We assessed the prevalence of Cryptosporidium and Giardia infections among children using protected and unprotected water sources in the Lege Dini watershed,…”
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Petrogenesis of silicic peralkaline rocks in the Ethiopian rift: Geochemical evidence and volcanological implications by Peccerillo, A., Donati, C., Santo, A.P., Orlando, A., Yirgu, G., Ayalew, D.

“…Major, trace element and isotopic data for mafic to peralkaline silicic volcanic rocks from the northern sector of the main Ethiopian rift are discussed with…”
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Land use change and climate dynamics in the Rift Valley Lake Basin, Ethiopia by Ayalew, Ayenew D., Wagner, Paul D., Sahlu, Dejene, Fohrer, Nicola

“…Land use and climate dynamics have a pronounced impact on water resources, biodiversity, land degradation, and productivity at all scales. Thus, in this study,…”
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Hydrological responses to land use and land cover change and climate dynamics in the Rift Valley Lakes Basin, Ethiopia by Ayalew, Ayenew D., Wagner, Paul D., Tigabu, Tibebe B., Sahlu, Dejene, Fohrer, Nicola

“…Abstract Due to the rapid socio-economic development in the Ethiopian Rift Valley basin, the pressures on water resources are increasing. To understand the…”
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Controls on magmatic cycles and development of rift topography of the Manda Hararo segment (Afar, Ethiopia): Insights from cosmogenic 3He investigation of landscape evolution by Medynski, S., Pik, R., Burnard, P., Williams, A., Vye-Brown, C., Ferguson, D., Blard, P.-H., France, L., Yirgu, G., Seid, J.I., Ayalew, D., Calvert, A.

“…Crustal extension at mature continental rifts and oceanic ridges occurs by a combination of normal faulting and magma injection, which interact to create rift…”
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Insight into the origin of gabbro-dioritic cumulophyric aggregates from silicic ignimbrites: Sr and Ba zoning profiles of plagioclase phenocrysts from Oligocene Ethiopian Plateau rhyolites by Barbey, Pierre, Ayalew, Dereje, Yirgu, Gezahegn

“…The Were Ilu ignimbrites are unlike other Oligocene rhyolites from the Ethiopian continental flood basalt province, in that they consist of plagioclase…”
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Petrology and Isotope Geochemistry of the Pan-African Negash Pluton, Northern Ethiopia: Mafic-Felsic Magma Interactions During the Construction of Shallow-level Calc-alkaline Plutons by Asrat, A, Barbey, P, Ludden, J N, Reisberg, L, Gleizes, G, Ayalew, D

“…The Negash pluton consists of monzogranites, granodiorites, hybrid quartz monzodiorites, quartz monzodiorites and pyroxene monzodiorites, emplaced at 608 ± 7…”
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