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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Journal ArticleDOI
Depleted mantle-plume geochemical signatures: No paradox for plume theories
TL;DR: In this paper, the authors propose that mantle plumes consist of a mixture of enriched or fusible streaks in a depleted, refractory matrix; preferential extraction of the enriched component occurs close to the plume axis.
Journal ArticleDOI
The differentiation of eucrites: The role of in situ crystallization
TL;DR: In this paper, major and trace element analyses of 17 eucrites, including three cumulate eucrite (Binda, Moore County, and Serra de MagC) are reported.
Journal ArticleDOI
Constraints on the Source Components of Lavas Forming the Hawaiian North Arch and Honolulu Volcanics
TL;DR: In contrast, the large range of published Os/Os data (0 134±0 176) reflects heterogeneity caused by various proportions of pyroxenite veins residing in a depleted peridotite matrix as mentioned in this paper.
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Osmium–oxygen isotopic evidence for a recycled and strongly depleted component in the Iceland mantle plume
TL;DR: In this article, the authors suggest that tapping of the refractory and depleted part of such a mantle plume (i.e., low 187 Os/ 188 Os and δ 18 O) is only possible due to the fortuitous location of the Iceland plume beneath a spreading ridge, which permits more extensive melting than would occur in an intraplate setting (e.g. Hawaii).
Journal ArticleDOI
Cross calibration of K-Ar standard minerals using an unspiked Ar measurement technique
TL;DR: In this article, an analytical procedure was developed to intercalibrate the 40 Ar content of 40 Ar / 39 Ar and 40 K / 40 Ar standard minerals, based on an unspiked volumetric standardisation method developed for K-Ar dating.