A LREE-depleted component in the Afar plume; further evidence from Quaternary Djibouti basalts
Mohamed Ahmed Daoud,René C. Maury,Jean-Alix Barrat,Rex N. Taylor,Bernard Le Gall,Hervé Guillou,Joseph Cotten,Joël Rolet +7 more
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TLDR
In this paper, trace element and isotopic (Sr, Nd, Pb) data and unspiked K-Ar ages are presented for Quaternary (0.90-0.95 Ma old) basalts from the Hayyabley volcano, Djibouti.About:
This article is published in Lithos.The article was published on 2010-02-01 and is currently open access. It has received 22 citations till now. The article focuses on the topics: Basalt & Trace element.read more
Figures
Table 2 (continued).4 5 
Table 2 (continued).4 5 
Table 3 Click here to download Table: Hayy_Table 3nb.doc 
Table 1. Unspiked 40K-40Ar datings of Hayyabley basalts. See text for the analytical 1 procedures. 2 3 
Table 1.5 
Table 4. Sr, Nd and Pb isotopic compositions of Hayyabley basalts (B: bulk rock; R: residue 1 after leaching). See text for the analytical procedures. Δ7/4 and Δ 8/4 denote the deviation (in 2 0/00) of
Citations
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The size of plume heterogeneities constrained by Marquesas isotopic stripes
Catherine Chauvel,René C. Maury,Sylvain Blais,Eric Lewin,Hervé Guillou,Gérard Guille,Philippe Rossi,Marc-André Gutscher +7 more
TL;DR: In this paper, the authors present new Sr, Nd, Pb, Hf and Hf isotopes as well as trace element data on lavas from several Marquesas Islands and demonstrate that this archipelago consists of two adjacent and distinct rows of islands with significantly different isotopic compositions.
Journal ArticleDOI
Young rift kinematics in the Tadjoura rift, western Gulf of Aden, Republic of Djibouti
TL;DR: In this paper, the Tadjoura rift is interpreted as an asymmetrical south-facing half-gr aben, about 40 km wide, dominated by a large boundary fault zone to the north.
Journal ArticleDOI
The Cenozoic magmatism of East Africa: Part V – Magma sources and processes in the East African Rift
TL;DR: In this paper, the isotopic systematics of East African magmatism reveal significant complexity as to the specific reservoirs that may participate in the melting processes noted above, and the isotope characteristics of magma suites from throughout the region form arrays that broadly converge on the composition of the Afar Plume, despite some complexity where the plume material has formed a hybrid plume-lithosphere component.
Journal ArticleDOI
Palaeoproterozoic Continental MORB-type Tholeiites in the Karelian Craton: Petrology, Geochronology, and Tectonic Setting
A. V. Stepanova,A. V. Samsonov,E. B. Sal’nikova,Igor S. Puchtel,Yu. O. Larionova,A. N. Larionov,V. S. Stepanov,Y. B. Shapovalov,S. V. Egorova +8 more
TL;DR: In this paper, the authors used the results of U^Pb (zircon) and Sm^Nd internal isochron dating for MORB-type tholeiitic dikes in the Karelian Craton, eastern Fennoscandian Shield.
References
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Mantle Plumes and Entrainment: Isotopic Evidence
TL;DR: Many oceanic island basalts show sublinear subparallel arrays in Sr-Nd-Pb isotopic space, but the depleted upper mantle is rarely a mixing end-member of these arrays, as would be expected if mantle plumes originated at a 670-kilometer boundary layer and entrained upper mantle during ascent.
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Heterogeneous mantle domains: signatures, genesis and mixing chronologies
TL;DR: In this paper, the authors present a data set of over 300 oceanic basalts from 43 oceanic islands or island groups, including the DUPAL belt, and show that 95% of all basalts with a strong DUPAL signature lie between 0° and 50° south latitude.
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The O, Sr, Nd and Pb isotope geochemistry of MORB
TL;DR: In this paper, the authors report analyses of O, Sr, Nd and Pb isotope ratios in 52 fresh glasses of mid-ocean ridge basalt (MORB).
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Thermal and chemical structure of the Iceland plume
TL;DR: In this article, the authors used Nb, Zr and Y data to identify the mantle sources for Palaeocene and Eocene basaltic lavas erupted around the Atlantic margins in order to deduce the thermal and compositional structure of the head of the ancestral Iceland plume.
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Continental flood basalts
TL;DR: The Columbia River Basalt as discussed by the authors is a type of flood basalts and MORB: A Brief Discussion of Similarities and Differences in their Petrogenesis, and a brief discussion of the similarities and differences in their petrogenesis.