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
Reads0
Chats0
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
Calculation of cerium and lanthanum anomalies in geological and environmental samples
TL;DR: In this article , a database of rocks exhibiting no La and Ce anomalies was used to demonstrate that linear extrapolation can result in markedly different results depending on whether chondritic or shale values are used for normalization.
Dissertation
Characteristics and Genesis of Enkafela Manganese Deposit, Dallol Area, Northern Afar Depression
TL;DR: A Thesis Submitted to the Department of Accounting and Finance as discussed by the authors in Partial Fulfillment of the Requirements for the degree of Master of Science in Accounting and finance was submitted.
Journal ArticleDOI
The Riphean magmatism preceding the opening of Uralian paleoocean: geochemistry, isotopes, age, and geodynamic implications
TL;DR: In this article, the authors present the geochemical data on the Sr-, Nd-isotopes, zircon U-Pb (SHRIMP) ages for the MesoNeoproterozoic igneous rocks and associated ores from the Bashkir meganticlinorium (BMA) on the Urals western slope.
Book ChapterDOI
Alkaline and Ultra-Alkaline Rocks, Carbonatites, and Kimberlites
TL;DR: The petrology and origin of some rare rock types that have high to very high alkalis, including kimberlites to phonolites, are discussed in this chapter as mentioned in this paper.
Journal ArticleDOI
Temporal clustering of fissural eruption across multiple segments within the Ethiopian Rift
Melanie Siegburg,Thomas M. Gernon,Derek Keir,Jonathan M. Bull,G. N. Taylor,Emma Watts,Tim Greenfield,Ermias Filfilu Gebru +7 more
TL;DR: In this paper , radiocarbon dates of multiple charcoal samples from the base of the most recent fissural lava at the Boset Volcanic Complex indicate that it likely occurred between 1812 and 1919 CE.
References
More filters
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
Journal ArticleDOI
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.
Journal ArticleDOI
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.