Results 21 to 30 of about 2,508 (202)

The origin of kimberlite [PDF]

, 1980
A new diapiric model for kimberlite genesis takes into account recent interpretations of peridotite-CO_2-H_2O melting relationships. A minor thermal perturbation at depth might trigger release of reduced vapors with major components C-H-O.
Wyllie, Peter J.
core   +1 more source

Oxide minerals of Kaavi kimberlites (Finland)

Известия высших учебных заведений: Геология и разведка, 2019
The mineralogical and petrogeochemical features of the Neoproterozoic kimberlite rocks of the Lahtojoki and Niilonsuo pipes of the Kaavi cluster (Kaavi-Kuopio, Finland) have been studied, differences in their petrogeochemical composition, quantitative ...
N. S. Azarova, A. V. Bovkun, V. K. Garanin, D. A. Varlamov, H. L. Hong   +4 more
doaj   +1 more source

Review of the spatial distribution of kimberlite pipes in the tectonic structures of the world

Geo&Bio
Kimberlite pipes are vertical or inclined cylindrical or cone-shaped bodies filled with kimberlite, an ultramafic igneous rock. The diameter of kimberlite pipes can vary from a few metres to 1.5 km, and their depth reaches several kilometres.
Andrii Luniachek
doaj   +1 more source

STRUCTURAL-COMPOSITIONAL MODEL OF THE NYURBINSKAYA KIMBERLITE PIPE FORMATION (SREDNE-MARKHA AREA OF THE YAKUTIAN DIAMONDIFEROUS PROVINCE)

Геодинамика и тектонофизика, 2016
The paper presents the results of comprehensive study of the primary diamond deposit of the Nyurbinskaya pipe in the Yakutian diamondiferous province. It is established, that the pipe is confined to the fault junction of four directions and is composed ...
A. S. Gladkov, D. A. Koshkarev, A. V. Cheremnykh, F. João, M. A. Karpenko, M. V. Marchuk, I. A. Potekhina   +6 more
doaj   +1 more source

Abundance and Partitioning of OH in a High-pressure Magmatic System: Megacrysts from the Monastery Kimberlite, South Africa [PDF]

, 2004
Concentrations of OH, and major and trace elements were determined in a suite of mantle-derived megacrysts that represent the crystallization products of a kimberlite-like magma at ~5 GPa and ~1400–1100°C.
Bell, David R., Moore, Rory O., Rossman, George R.   +2 more
core   +1 more source

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
openaire   +2 more sources

A contribution to aeromagnetic deculturing in populated areas [PDF]

, 2016
Modern regional airborne magnetic data sets when acquired in populated areas are inevitably degraded by cultural interference. In the UK context, the spatial densities of interfering structures and their complex spatial form severely limit our ability to
Beamish, David
core   +1 more source

Interaction between protokimberlite melts and mantle lithosphere: evidence from mantle xenoliths from the Dalnyaya kimberlite pipe, Yakutia (Russia) [PDF]

, 2017
The Dalnyaya kimberlite pipe (Yakutia, Russia) contains mantle peridotite xenoliths (mostly lherzolites and harzburgites) that show both sheared porphyroclastic (deformed) and coarse granular textures, together with ilmenite and clinopyroxene megacrysts.
Afanasiev, Agashev, Agashev, Amshinsky, Arndt, Ashchepkov, Ashchepkov, Ashchepkov, Ashchepkov, Ashchepkov, Ashchepkov, Ashchepkov, Ashchepkov, Ashchepkov, Bedard, Blundy, Boyd, Boyd, Brett, Brey, Burgess, Bussweiler, Bussweiler, Cas, DePaolo, Doucet, Evans, Finnerty, Fulmer, Genshaft, Gibson, Girnis, Giuliani, Goncharov, Green, Gregoire, Haggerty, Hart, Harte, Hauri, Howarth, Höfer, Imai, Ionov, Ionov, Ionov, Ishimaru, Karato, Kargin, Katayama, Kennedy, Klein-Ben David, Klemme, Kohler, Konzett, Kopylova, Kostrovitsky, Krogh, Kuzyura, Lavrent'ev, Lazarov, Logvinova, McCammon, McCammon, McDonough, McGregor, Mitchell, Moore, Moore, Nickel, Nickel, Nimis, O'Neill, O'Neill, Pearson, Peslier, Pokhilenko, Pokhilenko, Pokhilenko, Pokhilenko, Rodionov, Rodionov, Rodionov, Rudnick, Sazonova, Smelov, Sobolev, Sobolev, Sobolev, Sobolev, Sobolev, Sobolev, Solov'eva, Spetsius, Spetsius, Stagno, Stagno, Taylor, Tuff, Wells, Wu, Zack   +101 more
core   +2 more sources

Comparative characteristics of diamonds from areas with a high density of kimberlite bodies

Известия высших учебных заведений: Геология и разведка, 2023
Background. This paper presents a comparative study into diamonds from kimberlite bodies of the Verkhnemunsky field (Zapolyarnaya, Novinka, Komsomolskaya-Magnitnaya and Poiskovaya), the results of which allow these minerals to be distinguished from those
N. N. Zinchuk, V. I. Koptil
doaj   +1 more source

Tunguska Dark Matter Ball

, 2015
It is suggested that the Tunguska event in June 1908 cm-large was due to a cm-large ball of a condensate of bound states of 6 top and 6 anti-top quarks containing highly compressed ordinary matter. Such balls are supposed to make up the dark matter as we
Froggatt, C. D., Nielsen, H. B.
core   +1 more source