Results 51 to 60 of about 146 (130)

Specific features of kimberlites of Mirny field (Sibirian platform)

Известия высших учебных заведений: Геология и разведка, 2019
Results of comparative complex investigation are provided for diamonds from primary bodies of Mirny kimberlite field, among which three groups are distinguished sharply differing by typomorphic features of crystals, related with three separated in time ...
N. N. Zinchuk, V. I. Koptil
doaj   +1 more source

Magnetic surface geometry inversion of Kimberlites in Botswana

Geophysical Prospecting, Volume 72, Issue 9, Page 3524-3546, November 2024.
Abstract Surface geometry inversion of geophysical data has recently been introduced as an effective approach for generating surface‐based geological models. The models obtained through surface geometry inversion clearly delineate the contacts between distinct rock units, making them easily interpretable by geologists.
Saeed Vatankhah, Peter G. Lelièvre, Kitso Matende, Kevin Mickus   +3 more
wiley   +1 more source

Confocal Raman spectroscopic study of melt inclusions from peridotite xenoliths in economic and barren kimberlites from Kaapvaal Craton

Journal of Raman Spectroscopy, Volume 55, Issue 10, Page 1090-1104, October 2024.
Olivine‐hosted secondary melt inclusions in xenoliths from five Kaapvaal craton kimberlites of variable diamond grade do not show difference in composition. The composition of 26 minerals identified in the daughter phases suggests carbonate melt rich in alkali, sulfur, chlorine, and phosphorus infiltrated the kimberlite xenoliths.
Sahroz Khan, Yana Fedortchouk, Monika Feichter, Tivadar M. Toth   +3 more
wiley   +1 more source

When a Plateau Suppresses a Plume: Disappearance of the Samoan Plume Under the Ontong Java Plateau

AGU Advances, Volume 5, Issue 4, August 2024.
Abstract The Samoan hotspot generated an age‐progressive volcanic track that can be traced back to 24 Ma at Alexa Bank, but the trace of the older portion (>24 Ma) of the hotspot track is unclear. We show that six seamounts located in and around the Magellan Seamount chain—north of the Ontong‐Java Plateau (OJP)—have ages (87–106 Ma), geochemistry, and ...
M. G. Jackson, V. A. Finlayson, Bernhard Steinberger, Kevin Konrad   +3 more
wiley   +1 more source

TO THE 100TH ANNIVERSARY OF MIKHAIL M. ODINTSOV, CORRESPONDING MEMBER OF THE USSR ACADEMY OF SCIENCES

Геодинамика и тектонофизика, 2015
This article provides basic information about Mikhail M. Odintsov (1911–2011), Corresponding Member of the USSR Academy of Sciences, and his scientific, organizational and social activities.
Dmitry P. Gladkochub, Raisa P. Dorofeeva, Konstantin N. Egorov   +2 more
doaj   +1 more source

Ancient Craton‐Wide Mid‐Lithosphere Discontinuity Controlled by Pargasite Channels

Geophysical Research Letters, Volume 51, Issue 9, 16 May 2024.
Abstract The mechanisms governing a commonly observed seismic velocity drop in the cratonic lithosphere, referred to as the mid‐lithospheric discontinuity (MLD), have been widely debated. To identify the composition and seismic structure of MLDs, we have analyzed Sp receiver functions (SRF) and mantle xenocrysts for six regions across Australia.
Z. J. Sudholz, P. Zhang, C. M. Eakin, G. M. Yaxley, A. L. Jaques, C. Frigo, K. Czarnota   +6 more
wiley   +1 more source

Crater formation and erosional truncation of Arkhangelskaya kimberlite pipe (Russia)

Известия высших учебных заведений: Геология и разведка, 2019
The Late Devonian kimberlite pipes Arkhangelskaya, Pionerskaya, named after Grib, as well as a number of other pipes, have full sections of crater tufogenic and terrigenous deposits in the Zimneberezhny diamondiferous region, the thickness of which is ...
A. V. Bolonin, P. A. Ignatov, A. V. Petrov   +2 more
doaj   +1 more source

PREDICTION OF THE PRIMARY SOURCES OF GIANT CLIPPIR DIAMONDS IN THE NORTH OF YAKUTIA BY THE METHOD OF MINERALOGICAL AND GEOCHEMICAL ANALOGY (METHOD 5E DIAGRAMS)

Геодинамика и тектонофизика
The finds of giant CLIPPIR-type diamonds in the placers hosted by the Ebelyakh River basin in the north of Yakutia suggest that similar diamonds can be found in the kimberlites of the Anabar region and the nearest northern deposits located within the ...
A. S. Ivanov, V. N. Zinchenko, I. V. Ashchepkov, S. A. Babushkina, O. B. Oleinikov, P. N. Shelkov   +5 more
doaj   +1 more source

Specific Internal Structure of Diamonds from Zarnitsa Kimberlite Pipe

Crystals, 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.
Alexey Ragozin, Dmitry Zedgenizov, Konstantin Kuper, Yuri Palyanov   +3 more
doaj   +1 more source

The Deep Structure of the Kimberlite Pipe Volchya in the Arkhangelsk Diamond Province and Controlling Faults Based on Passive Seismic and Radiological Methods (Northwest Russia)

Applied Sciences
The successful prospecting of kimberlite pipes is dependent upon a comprehensive understanding of the deep structures of the pipes and the host geological formation. This is a challenging task, given the complex nature of diamond deposits, the small size
Konstantin Danilov, Evgeny Yakovlev, Andrey Puchkov, Vladimir Bykov, Alexander Katorin   +4 more
doaj   +1 more source