Results 221 to 230 of about 3,644 (268)

MANTLE XENOLITHS IN THE MATSOKU KIMBERLITE PIPE

Physics and Chemistry of the Earth, 1975
Abstract The chemical compositions of selected xenoliths from the Matsoku pipe and many constituent minerals are discussed. It is concluded that the xenoliths form a closely related suite of rocks of differing mineralogy and chemistry which could have been produced during a single igneous event in the mantle. It is likely that at solidus temperatures
J.J. Gurney, B. Harte, K.G. Cox
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Kimberlites of the Manchary pipe: a new kimberlite field in Central Yakutia

Russian Geology and Geophysics, 2010
Abstract This paper reports new petrographic and mineralogical data on the Manchary kimberlite pipe, which was discovered south of Yakutsk (Central Yakutia) in 2007–2008, 100 km. The pipe breaks through the Upper Cambrian carbonate deposits and is overlain by Jurassic terrigenous rock masses about 100 m thick.
A.P. Smelov, A.P. Andreev, Z.A. Altukhova, S.A. Babushkina, K.A. Bekrenev, A.I. Zaitsev, E.D. Izbekov, O.V. Koroleva, V.M. Mishnin, A.V. Okrugin, O.B. Oleinikov, A.A. Surnin   +11 more
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Geomechanical conditions of kimberlite extraction in terms of internatsionalnaya kimberlite pipe

Journal of Mining Science, 2009
The paper analyzes geomechanical conditions of slicing method application to extract a vertical ore body in terms of Internatsionalnaya kimberlite pipe. The authors assess stability of stopes at principal stages of horizon mining.
V. D. Baryshnikov, L. N. Gakhova
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Model of a kimberlite pipe

Physics and Chemistry of the Earth, 1975
Abstract The model of a kimberlite pipe depicts a hypothetical pipe having a diameter of 300 m at a level equivalent to the post-erosional (present-day) surface of the major pipes in the Kimberley area. Below this reference level the pipe configuration and composition illustrate features typical of the Kimberley occurrences.
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On the geological-prospecting types of kimberlite pipes

Proceedings of the Komi Science Centre of the Ural Division of the Russian Academy of Sciences, 2023
The conducted research on geological structure and material composition of the Siberian platform kimberlites indicated the complexity and diversity of geologic-tectonic and paleogeographic conditions which should be considered when performing the prediction-prospecting works for diamonds in every particular region.
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Unaltered kimberlite of Internationalnaya pipe (Mirny field)

Ores and metals, 2021
The porphyry kimberlite block (intrusive coherent kimberlite, after Scott-Smith, 2013) on the deep horizons of the Internationalnaya pipe is characterized by the lack of olivine macrocryst serpentinization, and the minimum degree of postmagmatic alteration in the matrix minerals.
Bogdan Pomazansky, Richard Monkhorov, Tat’yana Antonova, Vladimir Malkovets, Alexey Kulagin, Marina Shalkina, Viktoria Batyr, Alexey Sobakin   +7 more
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Seismic methods for the detection of kimberlite pipes

Exploration Geophysics, 1998
The results of a seismic experiment conducted in Northern Territory over known kimberlite pipes are shown.
Milovan Urosevic, Brian J. Evans
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Bitumens in the Mir Kimberlite Pipe (Yakutia)

Geochemistry International
Solid bitumen in the Mir kimberlite pipe form vein-like segregations several centimeters in size. They are distributed irregularly in the pipe body, regardless of the kimberlite breccia varieties distribution. Bitumen content in kimberlites ranges from 0.001 wt% to 0.12 wt%.
F. V. Kaminsky, I. V. Konopleva, V. L. Skvortsova, O. V. Kuznetsova   +3 more
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A Phreatomagmatic Kimberlite: The A418 Kimberlite Pipe, Northwest Territories, Canada

2013
The A418 kimberlite pipe, Northwest Territories, Canada, has a typical downward tapering morphology, has been explored to a depth of ~600 m where the pipe has a diameter of ~50 m, and is infilled by volcaniclastic deposits. The pipe-filling volcanic succession has a minimum volume of ~6 × 106 m3 and comprises structurally diverse deposits including ...
Lucy Anne Porritt, James Kelly Russell, Hayley McLean, Gus Fomradas, David Eichenberg   +4 more
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