Results 171 to 180 of about 6,833 (203)
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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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International Geology Review, 1971
Inasmuch as kimberlites prove to be porphyritic rocks of effusive habit, upon review of published ideas and facts, the general classification of effusive rocks is fully applicable to kimberlites. Consequently superfluous adjectives such as “massive,” “igneous,” “basaltic,” etc., and use of the term “kimberlite” itself should be discouraged.
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Inasmuch as kimberlites prove to be porphyritic rocks of effusive habit, upon review of published ideas and facts, the general classification of effusive rocks is fully applicable to kimberlites. Consequently superfluous adjectives such as “massive,” “igneous,” “basaltic,” etc., and use of the term “kimberlite” itself should be discouraged.
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Kimberlites, Kimberlite Exploration, and the Geomorphic Evolution of Botswana
2022Andy Moore, Mike Roberts
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1986
The mineralogy of kimberlites is a result of crystallization of the parent magma over pressure and temperature conditions ranging from those of the upper mantle to those of the upper crust, and is complicated by the presence of the enigmatic megacryst suite and numerous mantle-derived xenocrysts.
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The mineralogy of kimberlites is a result of crystallization of the parent magma over pressure and temperature conditions ranging from those of the upper mantle to those of the upper crust, and is complicated by the presence of the enigmatic megacryst suite and numerous mantle-derived xenocrysts.
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Temperature changes in ascending kimberlite magma
Earth and Planetary Science Letters, 2009Steve Sparks
exaly