Results 1 to 10 of about 2,911 (204)

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

Руды 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., Mal’kovets V. G., Gibsher A. A., Yakovlev I. V., Tychkov N. S.   +4 more
doaj   +2 more sources

KIMBERLITE SILLS AND DYKES ASSOCIATED WITH THE WESSELTON KIMBERLITE PIPE, KIMBERLEY, SOUTH AFRICA [PDF]

South African Journal of Geology, 2012
Field relations, petrography and bulk rock geochemistry constrain the emplacement mechanisms and petrogenesis of a kimberlite sill complex exposed in water tunnels at Wesselton Mine, Kimberley. The sill complex, together with associated dykes, is precursor to the main Wesselton pipe and contains: 1.
White, Jenny, Sparks, R. S. J., Bailey, K., Barnett, W. P., Field, M., Windsor, L.   +5 more
openaire   +4 more sources

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

PLoS 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, Adam Z Csank, Alberto V Reyes, Ryan C McKellar, Ralf Tappert, Karlis Muehlenbachs   +5 more
doaj   +2 more sources

THE “CLINOPYROXENE” PALEOGEOTHERM BENEATH THE OBNAZHENNAYA KIMBERLITE PIPE AND THIСKNESS OF LITHOSPHERE UNDER THE KUOYKA FIELD (SIBERIAN CRATON, YAKUTIA)

Геодинамика и тектонофизика, 2022
The mantle paleogeotherm under the Obnazhennaya kimberlite pipe (Kuoika field, Siberian craton) was reconstructed using the chemical composition of clinopyroxene xenocrystals and the FITPLOT program.
E. A. Muravjeva, A. M. Dymshits, I. S. Sharygin, A. V. Golovin, A. M. Logvinova, O. B. Oleinikov   +5 more
doaj   +2 more sources

Mantle xenoliths from Komsomolskaya kimberlite pipe, Yakutia: Multistage metasomatism

Geosystems and Geoenvironment
Minerals from > 200 mantle xenoliths from Komsomolskaya kimberlite pipe were studied by electron microprobe and LA-ICP-MS. They are metasomatised garnet and spinel peridotites containing phlogopite, amphibole and ilmenite with garnets (up to 12.5 wt ...
Igor V. Ashchepkov, Theodoros Ntaflos, Nikolai S. Medvedev, Nikolai V. Vladykin, Alla M. Logvinova, Denis S. Yudin, Hilary Downes, Igor V. Makovchuk, Ravil F. Salikhov   +8 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

Геодинамика 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, A. V. Golovin, I. S. Sharygin   +2 more
doaj   +1 more source

THE RELATIONSHIP BETWEEN KIMBERLITE AND BASALT MAGMATISM IN THE NAKYN FIELD OF THE YAKUTIAN KIMBERLITE PROVINCE BASED ON THE STUDY OF THE NYURBA PIPE

Геодинамика и тектонофизика, 2022
The paper touches upon the relationships between kimberlite and basalt magmatism in the Nakyn field of the Yakutian kimberlite province. It was established, that the source for melts of pre-kimberlite basite was the ancient enriched lithosphere mantle ...
S. M. Sablukov, L. I. Sablukova
doaj   +1 more source

Radon over Kimberlite Pipes: Surface Field Experiments and Calculations of Vertical Diffusion (Arkhangelsk Diamondiferous Province, NW Russia)

Applied Sciences, 2021
We present the results of field and experimental studies to assess the influence on the formation of the radon field over the kimberlite pipes of the Arkhangelsk diamondiferous province.
Evgeny Yakovlev, Andrey Puchkov
doaj   +1 more source

Radon over Kimberlite Pipes: Estimation of the Emanation Properties of Rocks (Lomonosov Diamond Deposit, NW Russia)

Applied Sciences, 2021
In this paper, using the example of the Lomonosov diamond deposit, experimental studies of rocks were carried out to assess the main radiation and physical factors affecting the formation of the radon field over the kimberlite pipes of the Arkhangelsk ...
Evgeny Yakovlev, Andrey Puchkov
doaj   +1 more source

Geotechnical Modelling for Kimberlite Pipes [PDF]

Proceedings of the First Southern Hemisphere International Rock Mechanics Symposium, 2008
EKATI Diamond Mine is located some 200 km south of the Arctic Circle and 300 km northeast of Yellowknife in the Northwest Territories of Canada. It is a remote fly-in-fly-out site with road access limited to the winter ice road season. The operation currently consists of two active open pits and two underground operations.
Duncan Tyler, S Godden
openaire   +1 more source