Results 1 to 10 of about 3,644 (268)

Petrology of the Yubileynaya kimberlite pipe: application to the variation of kimberlites composition with the depth

open access: gold, 2020
<p>In this paper are summarized investigation results on the chemistry, petrography and mineralogy of kimberlitic rocks of the upper and deep levels of the Yubileynaya pipe. There are given original data on mineral phases contents in kimberlite ground mass,distribution of indicator minerals and olivine and its pseudomorphoses as ...
Zdislav Spetsius, A.V. Ivanov
  +4 more sources

Mineralogy of garnets from the Jubileinaya kimberlite pipe and Ottorzhenets kimberlite body

open access: yesРуды и металлы
The article presents results of a study of the chemical composition of garnet xenocrystals from a concentrate of the heavy fraction of kimberlites from the Yubileinaya pipe and Ottorzhenets kimberlite body.
Milaushkin M. V.   +4 more
doaj   +2 more sources

ALKALI-CONTAINING MINERALS WITHIN MELT INCLUSIONS IN OLIVINE OF MANTLE XENOLITHS FROM BULTFONTEIN KIMBERLITE PIPE (KAAPVAAL CRATON): EVIDENCE ON HIGH CONCENTRATIONS OF ALKALIS IN KIMBERLITE MELTS

open access: diamondГеодинамика и тектонофизика, 2022
The study reports the mineral assemblage of the crystallized secondary melt inclusions in the olivine of sheared peridotites xenoliths from Bultfontein kimberlite pipe (Kaapvaal Craton, South Africa).
A. A. Tarasov   +2 more
doaj   +3 more sources

Using perovskite to determine the pre-shallow level contamination magma characteristics of kimberlite [PDF]

open access: yesSouth African Journal of Geology, 2014
It remains difficult to obtain reliable geochemical signatures of uncontaminated kimberlite magma from bulk rock studies due to the combined effects of crustal assimilation and element mobility during post-emplacement alteration processes.
Hawkesworth, Chris J.   +2 more
core   +4 more sources

Pristine Early Eocene wood buried deeply in kimberlite from northern Canada. [PDF]

open access: yesPLoS ONE, 2012
We report exceptional preservation of fossil wood buried deeply in a kimberlite pipe that intruded northwestern Canada's Slave Province 53.3±0.6 million years ago (Ma), revealed during excavation of diamond source rock.
Alexander P Wolfe   +5 more
doaj   +2 more sources

Brines in deep horizons of the Udachnaya kimberlite pipe

open access: yesГеодинамика и тектонофизика, 2018
The study was focused on groundwaters sampled from boreholes drilled to deep horizons of the Udachnaya kimberlite pipe and the host sedimentary strata. Brines in the rocks significantly complicate underground mining.
S. V. Alekseev   +6 more
doaj   +3 more sources

The evolution of the crustal stress state of the Catoca kimberlite pipe area (northeastern Angola)

open access: diamondГеодинамика и тектонофизика, 2018
This paper presents the first results of the geostructural and tectonophysical studies of the crustal stress state in the Catoca kimberlite pipe area at the southwestern flank of the Kasai Shield in the northeasternAngola. In the evolution of the crustal
O. V. Lunina   +7 more
doaj   +3 more sources

Specific Internal Structure of Diamonds from Zarnitsa Kimberlite Pipe

open access: yesCrystals, 2017
The Zarnitsa kimberlite pipe is one of the largest pipes of the Yakutian diamondiferous province. Currently, some limited published data exists on the diamonds from this deposit.
A L Ragozin   +2 more
exaly   +3 more sources

Misconceptions in kimberlite pipe emplacement models

open access: bronzeInternational Kimberlite Conference Extended Abstracts: 2008, 2019
Volker Lorenz, Stephan Kurszlaukis
openalex   +3 more sources

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