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Examples oflamprophyres
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Thelamprophyresmay be classified as spessartites and minettes on the base of their mineralogy.
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All these suggest that thelamprophyreswere produced from differentiation of a parental magma, coupled with contamination by lower crust.
From theCambridge English Corpus
The chemical and isotopic data suggest that thelamprophyreswere derived from a metasomatized garnet peridotite.
From theCambridge English Corpus
To determine the proportions of crustal components in the source, we need to know the isotopic compositions of the magma that is parental to thelamprophyres.
From theCambridge English Corpus
The parental magma was derived from melting of a long-term enriched sub-continental lithospheric mantle source as is indicated by the highly enriched isotopic signatures of thelamprophyres.
From theCambridge English Corpus
For others, additional chemical, mineralogic, or textural criteria must be used, as forlamprophyres.
From
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This example is from Wikipedia and may be reused under a CC BY-SA license.While modern concepts see orangeites, lamproites and kimberlites as separate, a vast majority oflamprophyreshave similar origins to these other rock types.
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This example is from Wikipedia and may be reused under a CC BY-SA license.The clear-cut distinction of the microgranites and thelamprophyresfrom the other facies argues for the existence or the hybridisation of two separate magmas.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Kimberlites, lamproites and perhaps evenlamprophyresare known to contain diamond.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Signatures of the mantle are found in many large deposits, including melts from metasomatised mantle wedge as well aslamprophyres.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Lamprophyresare also known to be spatially and temporally associated with gold mineralisation.
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This example is from Wikipedia and may be reused under a CC BY-SA license.In manylamprophyresthe pale quartz and felspathic ingredients tend to occur in rounded spots, or ocelli, in which there has been progressive crystallization from the margins towards the center.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Lamprophyresoccur throughout all geologic eras.
FromThis example is from Wikipedia and may be reused under a CC BY-SA license.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Basalts, kimberlites, lamproites andlamprophyres, which have their source in the upper mantle, often contain fragments and crystals assumed to be a part of the originating mantle mineralogy.
FromThis example is from Wikipedia and may be reused under a CC BY-SA license.
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This example is from Wikipedia and may be reused under a CC BY-SA license.These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
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