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
More filters
Journal ArticleDOI
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
More filters
Journal ArticleDOI
Episodic spreading and rift propagation: New paleomagnetic and geochronologic data from the Afar Nascent passive margin
TL;DR: In this paper, the authors show that spreading and rift propagation in Afar are episodic and lead to alternate "effusive" and "tectonic" phases that may be of general significance for accreting plate boundaries.
Journal ArticleDOI
Isotopic constraints on the influence of the Icelandic plume
Rex N. Taylor,Rex N. Taylor,Matthew F. Thirlwall,Bramley J. Murton,David R. Hilton,M. A. Mary Gee +5 more
TL;DR: In this paper, the influence of the Iceland plume on the composition of lavas erupted on adjacent ridges remains a contentious issue, and the authors present evidence that the Sr, Nd and Pb isotope signature is in fact as widespread as its thermal and 3He anomalies.
Journal ArticleDOI
Propagation of an accreting plate boundary: a discussion of new aeromagnetic data in the Gulf of Tadjurah and southern Afar
TL;DR: In this paper, a detailed aeromagnetic survey of the Republic of Djibouti and immediate surroundings was performed in 1977 and two distinct magnetic styles are recognized: linear anomalies with both large amplitude and short wavelength, considered to be typical of oceanic lithosphere, contrast with areas of lower-amplitude longer-wavelength anomalies, which are found mostly in the northern part of the survey.
Journal ArticleDOI
Basaltic magmatism and the geodynamics of the East African Rift System
TL;DR: The major and trace element and radiogenic isotope compositions of basalts from throughout the East African rift system are reviewed in the context of constraints from previous geophysical studies in this paper, where the data indicate the presence of two mantle plumes, the east African and Afar plumes.
Journal ArticleDOI
Submarine basalts from the Red Sea: New Pb, Sr, and Nd isotopic data
TL;DR: In this paper, high-precision Pb isotope analyses are reported for Holocene basalts from the axial trough of the Red Sea in order to resolve the discrepancy between Pb data published in two recent papers.