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Kimberlitic zircons ? A possible aid in prospecting for kimberlites
Mineralium Deposita, 1975Kimberlitic zircons from 16 intrusions in Lesotho, the Republic of South Africa, and Tanzania have been investigated. The following characteristics distinguish the kimberlitic zircons from the zircons derived from most other sources: 1. Rounded to subrounded grains predominate; euhedral zircons are very rare. 2.
P. Kresten, P. Fels, G. Berggren
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What is a Kimberlite? Petrology and Mineralogy of Hypabyssal Kimberlites
Elements, 2019Hypabyssal kimberlites are subvolcanic intrusive rocks crystallised from mantle-derived magmas poor in SiO2 and rich in CO2 and H2O. They are complex, hybrid rocks containing significant amounts of mantle-derived fragments, primarily olivine with rare diamonds, set in a matrix of essentially magmatic origin.
Mitchell, Roger H. +2 more
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Physics and Chemistry of the Earth, 1975
Abstract The model of a kimberlite pipe depicts a hypothetical pipe having a diameter of 300 m at a level equivalent to the post-erosional (present-day) surface of the major pipes in the Kimberley area. Below this reference level the pipe configuration and composition illustrate features typical of the Kimberley occurrences.
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Abstract The model of a kimberlite pipe depicts a hypothetical pipe having a diameter of 300 m at a level equivalent to the post-erosional (present-day) surface of the major pipes in the Kimberley area. Below this reference level the pipe configuration and composition illustrate features typical of the Kimberley occurrences.
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Mineralogical Magazine, 2013
AbstractA detailed mineralogical examination of representative material from the P2-West 'kimberlite' located in the Wajrakarur Kimberlite Field (India) demonstrates that significant differences exist between these rocks and archetypal hypabyssal kimberlite.
Gurmeet Kaur, R. H. Mitchell
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AbstractA detailed mineralogical examination of representative material from the P2-West 'kimberlite' located in the Wajrakarur Kimberlite Field (India) demonstrates that significant differences exist between these rocks and archetypal hypabyssal kimberlite.
Gurmeet Kaur, R. H. Mitchell
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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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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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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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