Journal ArticleDOI
Geochemistry and petrogenesis of mafic sills in the 1.1 Ga Umkondo large igneous province, southern Africa
Reads0
Chats0
TLDR
The Mesoproterozoic Post-Waterberg sills A (MPWA sills) are characteristically LREE enriched with relatively unfractionated HREEs, and with normalised incompatible element profiles similar to modern island arc andesites as mentioned in this paper.About:
This article is published in Lithos.The article was published on 2012-06-01. It has received 23 citations till now. The article focuses on the topics: Large igneous province & Craton.read more
Citations
More filters
Journal ArticleDOI
Dykes of the 1.11 Ga Umkondo LIP, Southern Africa: Clues to a complex plumbing system
Michiel O. de Kock,Richard E. Ernst,Ulf Söderlund,Ulf Söderlund,Fred Jourdan,Axel Hofmann,Bernard Le Gall,Hervé Bertrand,Benny C. Chisonga,N.J. Beukes,H.M. Rajesh,H.M. Rajesh,L.M. Moseki,R. Fuchs +13 more
TL;DR: In this paper, the authors reported six new similar to 1110 Ma U-Pb TIMS baddeleyite ages for various dolerite dykes, which, when coupled with geochemistry from some of the dykes suggest association with the Umkondo Large Igneous Province (LIP).
Journal ArticleDOI
Archaean and Proterozoic diamond growth from contrasting styles of large-scale magmatism.
TL;DR: It is shown that two suites of diamonds define two isochrons, showing the importance of dating individual inclusions, and that there was a major change in the magmatic processes responsible for harzburgitic diamond formation beneath Venetia from the Archaean to the Proterozoic.
Book ChapterDOI
Neoarchean-Mesoproterozoic Mafic Dyke Swarms of the Indian Shield Mapped Using Google Earth™ Images and ArcGIS™, and Links with Large Igneous Provinces
TL;DR: In this paper, dyke swarm maps generated using Google Earth images, ArcGIS, field data, and available geochronological ages of Neoarchean-Mesoproterozoic (ranging in age from ~2.80 to ~1.10 Ga) mafic dyke swarms and associated magmatic units of the different Archean cratons of the Indian shield which represent the plumbing system of Large Igneous Provinces (LIPs).
Journal ArticleDOI
Geochemical characterization of a reconstructed 1110 Ma Large Igneous Province
Babita Rani Choudhary,Richard E. Ernst,Richard E. Ernst,Yi-Gang Xu,David Evans,Michiel O. de Kock,Joseph G. Meert,Amarildo Salina Ruiz,Gabrielle Aparecida de Lima +8 more
TL;DR: In this article, the authors reconstructed a conjoined Kalahari-SF/Congo reconstruction of the large Igneous Province (LIP) with plume center in the NW part of the Kalaharis Craton.
Journal ArticleDOI
Geochronological evidence for an extension of the Northern Lobe of the Bushveld Complex, Limpopo Province, South Africa
TL;DR: In this paper, the first geochronological study of the ultramafic-mafic succession (the Waterberg Project) located in the Southern Marginal Zone of the Limpopo Belt north of the Northern Lobe of the Bushveld Complex using U/Pb dating was conducted.
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
The continental crust: Its composition and evolution
TL;DR: In this paper, the authors describe the composition of the present upper crust and deal with possible compositions for the total crust and the inferred composition of lower crust, and the question of the uniformity of crustal composition throughout geological time is discussed.
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 Guide to the Chemical Classification of the Common Volcanic Rocks
T. N. Irvine,W. R. A. Baragar +1 more
TL;DR: In this paper, a system was presented whereby volcanic rocks may be classified chemically as follows: Subalkaline Rocks:A.B. Tholeiitic basalt series:Tholeitic picrite-basalt; tholeiite, tholeitic andesite; dacite; rhyolite.
Related Papers (5)
Geochemical discrimination of different magma series and their differentiation products using immobile elements
Approximation of terrestrial lead isotope evolution by a two-stage model
J.S. Stacey,Jan Kramers +1 more