Results 41 to 50 of about 10,376 (220)
Groundmass Chromospinellides from Kimberlites of Khompu-May Kimberlite Field
IOP Conference Series: Earth and Environmental Science, 2021 Abstract The current paper presents the results of studying chromites of kimberlite mesostasis forming the Manchary, Aprelskaya, Erel, Turakhskaya, and Artemova pipes within the Khompu-May kimberlite field (central Yakutia). Despite shared texture and structural characteristics and mineral composition of the kimberlites, chromospinellide
Nikolay Oparin, Oleg Oleynikov
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Titanium and water-rich metamorphic olivine in high-pressure serpentinites from the Voltri Massif (Ligurian Alps, Italy): evidence for deep subduction of high-field strength and fluid-mobile elements [PDF]
, 2014 Titanium- and water-rich metamorphic olivine (Fo 86-88) is reported from partially dehydrated serpentinites from the Voltri complex, Ligurian Alps. The rocks are composed of mostly antigorite and olivine in addition to magnetite, chlorite, clinopyroxene ...
De Hoog, Jan C. M. +3 more
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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 +6 more
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Criteries and prospects of diamonds of the Vitebsk granulite massif
Журнал Белорусского государственного университета: География, геология, 2021 The article describes the history of studying the diamond content of tectonic structures of the territory of Belarus. Based on the results of magnetometric, mineralogical, tectonic studies carried out by industrial geologists and scientists over the past
Victor S. Konishchev +1 more
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Yankuang ceshi, 2014 According to crystal mineralogy theory, under the diagenetic environments with different physical and chemical conditions, crystal structure and chemical composition of spinel group minerals in kimberlite will be obviously different.
CHI Guang-cheng, WU Yue
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Russian Journal of Earth Sciences, 2020 This paper addresses geochemical and petrological aspects of two outcropping kimberlites (5023 and 5119) of the Gooty cluster, emplaced in carbonate sediments of Vempalli Formation of lower Cuddapah basin at Krishtipadu, Anantapur district, Andhra ...
Phani P Ramesh Chandra +2 more
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The thermal equation of state of FeTiO_3 ilmenite based on in situ X-ray diffraction at high pressures and temperatures [PDF]
, 2010 We present in situ measurements of the unit-cell volume of a natural terrestrial ilmenite (Jagersfontein mine, South Africa) and a synthetic reduced ilmenite (FeTiO_3) at simultaneous high pressure and high temperature up to 16 GPa and 1273 K.
Chen, B. +10 more
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Material aspects of kimberlite rocks productivity
Мінеральні ресурси України, 2017 Most of investigated kimberlite diatremes of the Siberian platform represent multiphase pipes. Each magmatic phase of intrusion, formed inside diatremes, is composed by kimberlites with specific petrographic and petrochemical type possessing a number of ...
M. M. Zinchuk
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Sulfur Isotope Constraints on the Petrogenesis of the Kimberley Kimberlites
Geochemistry, Geophysics, Geosystems, 2021 Cretaceous kimberlites in southern Africa have been suggested to host deeply subducted material in their mantle sources based on radiogenic isotope systematics. However, potential subducted material contributions to the volatile budget, including sulfur,
Angus Fitzpayne +5 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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