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
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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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.
Journal ArticleDOI
Chemical and isotopic systematics of oceanic basalts. Implications for Mantle Composition and Processes
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Subcommission on geochronology: Convention on the use of decay constants in geo- and cosmochronology
R.H. Steiger,E. Jäger +1 more
TL;DR: The IUGS Subcommission on Geochronology (FOOTNOTE 4) as discussed by the authors recommended the adoption of a standard set of decay constants and isotopic abundances in isotope geology.
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A large-scale isotope anomaly in the Southern Hemisphere mantle
TL;DR: The authors showed that the isotopic mantle anomaly is globe-encircling in extent, centred on latitude 30° S. They also showed that this mantle anomaly has been in existence for billions of years and placed severe constraints on mantle convection models.
Journal ArticleDOI
Rare-earth abundances in chondritic meteorites
TL;DR: In this article, 15 chondrites, including eight carbonaceous chondites, were analyzed for rare earth element abundances by isotope dilution, and the persistence of anomalies in chondritic materials relatively removed from direct condensational processes implies that anomalous components were introduced at a late stage of chondrite formation.