Journal ArticleDOI
Geochemistry of the Uintjiesberg kimberlite, South Africa: petrogenesis of an off-craton, group I, kimberlite
TLDR
The Uintjiesberg kimberlite diatreme as mentioned in this paper is a group I, calcite kimbersite that has an emplacement age of ∼100 Ma.About:
This article is published in Lithos.The article was published on 2004-06-01. It has received 86 citations till now. The article focuses on the topics: Kimberlite & Xenolith.read more
Citations
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Journal ArticleDOI
Geochemistry of South African On- and Off-craton, Group I and Group II Kimberlites: Petrogenesis and Source Region Evolution
Megan Becker,Anton P. le Roex +1 more
TL;DR: In this paper, the authors used bulk-rock geochemical compositions of hypabyssal kimberlites, emplaced through the Archaean Kaapvaal craton and Proterozoic Namaqua-Natal belt, to estimate close-to-primary magma compositions of Group I kimbers.
Journal ArticleDOI
Dynamical constraints on kimberlite volcanism
TL;DR: In this article, the authors proposed a four-stage model for kimberlite eruptions to explain the main geological relationships of kimbersites, where the early flow exit conditions are overpressured with choked flow conditions; an exit velocity of ∼200m/s is estimated as representative.
Journal ArticleDOI
Geochemistry of hypabyssal kimberlites from Lac de Gras, Canada: Comparisons to a global database and applications to the parent magma problem
TL;DR: In this paper, the Lac de Gras parent magma compositions are compared to those calculated from other localities in Canada, Greenland, South Africa and Russia, and the calculated parent magmas define a range, albeit limited, of viable, yet distinct, kimberlite parent Magma compositions.
Journal ArticleDOI
Sr, Nd, and Pb isotope evidence for a mantle origin of alkali chlorides and carbonates in the Udachnaya kimberlite, Siberia
TL;DR: In this paper, the authors present new isotopic data that confirm a mantle origin for these kimberlitic chlorides and carbonates, and constrain the emplacement age as ca. 347 Ma.
Journal ArticleDOI
Kimberlite-hosted diamond deposits of southern Africa: A review
TL;DR: Kimberlite-hosted diamond deposits are a long-lived and complex series of processes that first involved the growth of diamonds in the mantle, and later their removal and transport to the earth's surface by kimbllite magmas.
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.
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Chemical and isotopic systematics of oceanic basalts. Implications for Mantle Composition and Processes
Journal ArticleDOI
Chemical differentiation of the Earth: the relationship between mantle, continental crust, and oceanic crust
TL;DR: In this paper, the average chemical compositions of the continental crust and the oceanic crust (represented by MORB), normalized to primitive mantle values and plotted as functions of the apparent bulk partition coefficient of each element, form surprisingly simple, complementary concentration patterns.
Journal ArticleDOI
Nature and composition of the continental crust: A lower crustal perspective
TL;DR: In this article, a three-layer crust consisting of upper, middle, and lower crust is divided into type sections associated with different tectonic provinces, in which P wave velocities increase progressively with depth and there is a large variation in average P wave velocity of the lower crust between different type sections.
Related Papers (5)
Petrogenesis of Group I Kimberlites from Kimberley, South Africa: Evidence from Bulk-rock Geochemistry
Geochemistry of South African On- and Off-craton, Group I and Group II Kimberlites: Petrogenesis and Source Region Evolution
Megan Becker,Anton P. le Roex +1 more