Results 21 to 30 of about 6,833 (203)
Diamonds from low-grade kimberlite
Руды и металлы, 2022 Based on exploration and sampling work on the Siberian platform (SP) the uneven diamond content of various diatremes was established. During the exploration apart from the pipes with high or medium content of a useful component also the diatremes with ...
Nikolay N. Zinchuk +1 more
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A study of unusual diamonds from the George Creek K1 Kimberlite dyke, Colorado [PDF]
, 1995 Cathodoluminescence photomicrographs of diamonds from the George Creek Kl (section 28) kimberlite dyke in Colorado reveal complex intergrowth relationships between CO?-free and CO?-bearing diamond growth generations.
Chinn, Ingrid Lee
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Empirical evidence for the fractionation of carbon isotopes between diamond and iron carbide from the Earth’s mantle [PDF]
, 2014 S.M. would like to thank the Engineering and Physical Sciences Research Council, the Diamond Trading Company, and the Department of Physical Sciences, The Open University (UK) for financial support during his time as a PhD student at University College ...
Krispin, Catherine +16 more
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Primary Composition of Kimberlite Melt
, 2023 The compositions (mineralogy, major- and trace-element chemistry of rocks and minerals, and Sr-Nd-Hf isotope systematics) of two kimberlite bodies, the Obnazhennaya pipe and the Velikan dyke from the Kuoika field, Yakutian kimberlite province (YaKP ...
Jing Sun +6 more
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Physical characteristics of kimberlite and basaltic intraplate volcanism and implications of a biased kimberlite record [PDF]
, 2013 We assess bias in the record of kimberlite volcanism by using newly acquired size data on more than 900 kimberlite bodies from 12 kimberlite fields eroded to depths of between 0 m and >1200 m, and by a comparison with intraplate monogenetic basaltic ...
Brown, RJ, Valentine, GA
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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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Review of the spatial distribution of kimberlite pipes in the tectonic structures of the world
Geo&BioKimberlite 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
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Geosciences, 2022 Тhe task of searching for kimberlite pipes in covered areas of the Yakutia kimberlite province is very difficult due to the significant heterogeneity of the rocks overlying kimberlite pipes.
Alexander K. Saraev +2 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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Geochemistry and petrogenesis of kimberlite intrusions from the eastern lobe the Du Toitspan kimberlite pipe, South Africa [PDF]
, 2020 The Du Toitspan kimberlite pipe located on the outskirts of Kimberley South Africa, is one four Cretaceous aged major kimberlite pipes from the well-known Kimberley cluster, the type locality for archetypal group I kimberlites.
Ramokgaba, Lesego
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