Journal ArticleDOI
Isotopic and trace element signatures of Ethiopian flood basalts: evidence for plume–lithosphere interactions
TLDR
In this article, trace element and radiogenic isotope data have been measured on Oligocene flood basalts from the northwestern Ethiopian plateau to investigate and identify the nature of mantle and crustal sources involved in the genesis of this huge volume of prerift basalts to constrain the interaction between the Afar mantle plume and the lithosphere at the onset of continental break-up.About:
This article is published in Geochimica et Cosmochimica Acta.The article was published on 1999-08-01. It has received 280 citations till now. The article focuses on the topics: Mantle plume & Flood basalt.read more
Citations
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U-Pb zircon geochronology, geochemistry and Nd isotopic study of Neoproterozoic bimodal volcanic rocks in the Kangdian Rift of South China : Implications for the initial rifting of Rodinia
TL;DR: In this article, the SHRIMP U-Pb zircon age, geochemical and Nd isotopic data are reported for the Neoproterozoic Suxiong volcanic rocks in the Kangdian Rift, western South China.
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Distinct mantle sources of low-Ti and high-Ti basalts from the western Emeishan large igneous province, SW China: implications for plume–lithosphere interaction
TL;DR: In this article, the best-exposed lava succession in the western ELIP is studied in order to further constrain their petrogenesis and plume-lithosphere interaction.
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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
TL;DR: Petrological and geochemical data are reported for basalts and silicic peralkaline rocks from the Quaternary Gedemsa volcano, northern Ethiopian rift, with the aim of discussing the petrogenesis of peralkal magmas and the significance of the Daly Gap occurring at local and regional scales as mentioned in this paper.
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Flood and shield basalts from Ethiopia: Magmas from the African superswell
Bruno Kieffer,Nicholas Arndt,Henriette Lapierre,Florence Bastien,Delphine Bosch,Arnaud Pêcher,Gezahegn Yirgu,Dereje Ayalew,Dominique Weis,Dougal A. Jerram,Francine Keller,Claudine Meugniot +11 more
TL;DR: The Ethiopian plateau is made up of several distinct volcanic centres of different ages and magmatic affinities as discussed by the authors, and the three main types of magma have very different major and trace element characteristics ranging from compositions low in incompatible elements in the tholeiites [e.g. 10 ppm La at 7 wt % MgO (=La7), La/εb = 4.2], moderate in the alkali basalts (La7 = 24, La/β = 9.2), and very high in the magnesian alkaline magmas (
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Late Mesoproterozoic to earliest Neoproterozoic basin record of the Sibao orogenesis in western South China and relationship to the assembly of Rodinia
TL;DR: The Laowushan Formation has a geochemical signature similar to basalts found in modern intracontinental rifts, with a uniform Nd isotopic character (−087 to +084) as mentioned in this paper.
References
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Chemical and isotopic systematics of oceanic basalt : implications for mantle composition and processes
TL;DR: In this article, trace-element data for mid-ocean ridge basalts and ocean island basalts are used to formulate chemical systematics for oceanic basalts, interpreted in terms of partial-melting conditions, variations in residual mineralogy, involvement of subducted sediment, recycling of oceanic lithosphere and processes within the low velocity zone.
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Chemical and isotopic systematics of oceanic basalts. Implications for Mantle Composition and Processes
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Magmatism at rift zones: The generation of volcanic continental margins and flood basalts
Robert S. White,Dan McKenzie +1 more
TL;DR: In this paper, the authors show that the production of magmatically active rifted margins and the effusion of flood basalts onto the adjacent continents can be explained by a simple model of rifting above a thermal anomaly in the underlying mantle.
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Flood Basalts and Hot-Spot Tracks: Plume Heads and Tails
TL;DR: Continental flood basalt eruptions have resulted in sudden and massive accumulations of basaltic lavas in excess of any contemporary volcanic processes, thought to result from deep mantle plumes.