Results 131 to 140 of about 366 (172)
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Polymineralic inclusions in kimberlite-hosted megacrysts: Implications for kimberlite melt evolution
Lithos, 2019Abstract Megacrysts are large (cm to >20 cm in size) mantle-derived crystals, which are commonly entrained by kimberlite magmas, comprising of olivine, orthopyroxene, clinopyroxene, phlogopite, garnet, ilmenite and zircon as common phases. Numerous studies have shown megacrysts to contain polymineralic inclusions, which have been interpreted to ...
Adam Abersteiner +7 more
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Geological Journal
ABSTRACT The Wajrakarur Kimberlite Field (WKF) in Anantapur, Andhra Pradesh, India, stands as a pivotal region for kimberlite exploration in the South Indian Kimberlite Province. It features distinct gravity highs and lows, sandwiched between Closepet Granite (CG) and Cuddapah Basin (CB), with notable gold‐mineralized Ramagiri ...
Raghu Vansh Bhushan Singh +2 more
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ABSTRACT The Wajrakarur Kimberlite Field (WKF) in Anantapur, Andhra Pradesh, India, stands as a pivotal region for kimberlite exploration in the South Indian Kimberlite Province. It features distinct gravity highs and lows, sandwiched between Closepet Granite (CG) and Cuddapah Basin (CB), with notable gold‐mineralized Ramagiri ...
Raghu Vansh Bhushan Singh +2 more
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Geology Today
Kimberlites, while relatively rare, are perhaps the most interesting of igneous rocks and have accordingly attracted attention disproportionate to their abundance. They are the source of most diamonds and bring us direct sampling of Earth’s mantle (otherwise only available indirectly by geophysical methods).
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Kimberlites, while relatively rare, are perhaps the most interesting of igneous rocks and have accordingly attracted attention disproportionate to their abundance. They are the source of most diamonds and bring us direct sampling of Earth’s mantle (otherwise only available indirectly by geophysical methods).
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Kimberlite Magmatism and Textural Genetic Classifications of Kimberlite
1986Initial studies of kimberlites (Wagner 1914) demonstrated that they occur as carrot-shaped vertical intrusions termed pipes or diatremes and as tabular dikes (fissure kimberlites).
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Lithos, 1970
Abstract Kimberlites are ultramafic rocks in which H 2 O, CO 2 and the residual elements K, Rb, Cs, Sr, Ba, U, Th, Nb, etc., are strongly concentrated. It is proposed that their restriction to continental shield areas is genetically significant in that these are the areas with the lowest geothermal gradients. In this environment, magmas form at very
Peter G. Harris, Eric A.K. Middlemost
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Abstract Kimberlites are ultramafic rocks in which H 2 O, CO 2 and the residual elements K, Rb, Cs, Sr, Ba, U, Th, Nb, etc., are strongly concentrated. It is proposed that their restriction to continental shield areas is genetically significant in that these are the areas with the lowest geothermal gradients. In this environment, magmas form at very
Peter G. Harris, Eric A.K. Middlemost
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THE KIMBERLITE FACTORY: THE VOLCANIC NATURE OF KIMBERLITES
Geological Society of America Abstracts with Programs, 2019Graham D.M. Andrews +3 more
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Kimberlites, Kimberlite Exploration, and the Geomorphic Evolution of Botswana
2022Andy Moore, Mike Roberts
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1986
Investigation of the geochemistry of kimberlite is hampered by problems inherent in the intrusive styles characteristic of this volatile-rich magma; by the hybrid nature of the rocks formed from magmas which carry a high proportion of crystalline phases at their time of emplacement; and by the high probability of contamination of some facies by crustal
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Investigation of the geochemistry of kimberlite is hampered by problems inherent in the intrusive styles characteristic of this volatile-rich magma; by the hybrid nature of the rocks formed from magmas which carry a high proportion of crystalline phases at their time of emplacement; and by the high probability of contamination of some facies by crustal
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Trace Elements in Chromian Spinels from Four Siberian Kimberlites
Minerals (Basel, Switzerland), 2022Gianluca Turco +2 more
exaly