Results 21 to 30 of about 366 (172)

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
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Attrition in the kimberlite system [PDF]

Mineralogy and Petrology, 2018
The sustained transportation of particles in a suspension commonly results in particle attrition leading to grain size reduction and shape modification. Particle attrition is a well-studied phenomenon that has mainly focussed on sediments produced in aeolian or fluvial environments. Here, we present analogue experiments designed to explore processes of
Jones, T.J., Russell, J.K.
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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
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Comparative characteristics of indicator minerals of kimberlites and new perspectives diamond of the Ygyatta diamondiferous region (Western Yakutia)

Известия высших учебных заведений: Геология и разведка, 2019
The new data on the composition of kimberlite indicator minerals (KIM) — pyropes and picroilmenites — of the first kimberlite body T-54-14, opened in 2015 in the Syuldyukar kimberlite field by the geologists of ALROSA PJSC, during the verification of the
T. S. Starkova, M. V. Maltsev, A. V. Tolstov   +2 more
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Oxygen fugacity of Alto Paranaíba kimberlites and diamond instability: Três Ranchos IV and Limeira I intrusions

Brazilian Journal of Geology, 2020
Oxygen fugacity (ƒO2) conditions were established for Três Ranchos IV (TR-IV, diamond-bearing) and Limeira I (LM-I, barren) kimberlite intrusions, in Alto Paranaíba Alkaline Province, to constrain a possible correlation between fO2 and diamond ...
Bruna Coldebella, Rogério Guitarrari Azzone, Luanna Chmyz, Excelso Ruberti, Darcy P. Svisero   +4 more
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Komatiites, kimberlites, and boninites [PDF]

Journal of Geophysical Research: Solid Earth, 2003
When the mantle melts, it produces ultramafic magma if the site of melting is unusually deep, the degree of melting is unusually high, or the source is refractory. For such melting to happen, the source must be unusually hot or very rich in volatiles. Differing conditions produce a spectrum of ultramafic magma types.
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MIKHAIL M. ODINTSOV’S CONTRIBUTION TO DEVELOPMENT OF THE MINERAL AND RAW MATERIALS COMPLEX OF THE EASTERN SIBERIA

Геодинамика и тектонофизика, 2015
The publication is devoted to the role of Mikhail M. Odintsov, Corresponding Member of the USSR Academy of Sciences, and his scientific school in solution of fundamental problems related to regularities of occurrence of endogenic mineral resources at ...
Konstantin N. Egorov
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GENESIS OF EXTREMELY MAGNESIAN DAUGHTER OLIVINE OF SECONDARY MELT INCLUSIONS FROM OLIVINE MACROCRYSTS IN KIMBERLITE FROM THE UDACHNAYA-EAST PIPE (SIBERIAN CRATON)

Геодинамика и тектонофизика
The paper presents the results of studies of daughter olivine within secondary melt inclusions marking healed cracks in olivine macrocrysts from unserpentinized kimberlite from the Udachnaya-East pipe.
A. A. Tarasov, A. V. Golovin
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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
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The principal morphogenetic characteristics of kimberlite indicator minerals

Руды и металлы
The article provides information on the morphology and morphogenesis of minerals from kimberlites and their scattering halos. The principal morphogenetic characteristics of the main kimberlite indicator minerals are discussed in detail.
Khmelkov A. M., Chuguevskaya E. A.
doaj   +1 more source