kimberlite
IPA: kˈɪmbɝɫaɪt
noun
- (geology) A variety of peridotite containing a high proportion of carbon dioxide; often contains diamonds.
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Examples of "kimberlite" in Sentences
- Meanwhile, the machines used to dig diamonds out of kimberlite ore can have hefty carbon footprints.
- The diamonds at Kimberley are found in a blue earth, technically known as kimberlite and commonly called "blue ground."
- These are deep, vertical shafts, usually filled with a mixture of rock types, including the diamond-bearing rock called kimberlite (Figure 1).
- He found half a dozen, but like 98 percent of the kimberlite formations in the world, they didn't contain diamonds in commercially viable quantities.
- (In kimberlite pipes that have gem-quality stones in commercial quantities, a concentration of 1 carat — 0.2 grams — per 100 tons can be profitable.)
- But Fipke and Blusson surmised that the indicators De Beers found had in fact been dragged far from the kimberlite pipe eons ago by a passing glacier.
- Most diamonds are found near the place where deep Earth processes blasted them to the surface in special rock material called kimberlite (named for Kimberley, South Africa).
- A combination of UG bulk sampling and LDD mini-bulk sampling is required to rigorously evaluate such a large kimberlite, which is buried under some 100 metres of glacial overburden.
- It was 1991, and he had found a kimberlite pipe (buried under 30 feet of glaciated sediment) with a concentration of 68 carats per 100 tons — the first Canadian diamonds ever found.
- He used an electron microprobe to analyze geological structures called kimberlite pipes — the places you occasionally (but not often) find diamonds — and discovered that the presence of chromite, ilmenite, and high-chrome, low-calcium garnet did indeed predict a rich strike.
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