Blue ground

Blue ground

In reconnaissance for diamond mining, blue ground refers to a layer of nonoxidized kimberlite. Kimberlites are a class of mineral most commonly associated with diamond mining. Before the advent of modern geophysical probes, the ideal way to find a kimberlite pipe, a prime location for finding diamonds, was to search for "yellow ground", a layer of oxidized kimberlite which, perhaps not surprisingly, is a deep tawny yellow. "Blue ground" was regarded with scorn during the South African diamond rushes, and one of the central characters in the initial diamond rush, Barney Barnato, made his fortune by purchasing digs in which the "blue ground" was all that was remaining.


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  • Blue Ground —   [ bluː graʊnd; englisch »blauer Grund«] der, s, Petrologie: Kimberlit …   Universal-Lexikon

  • blue ground — noun Etymology: translation of Afrikaans blougrond : kimberlite * * * blue ground noun A greyish blue decomposed agglomerate in which diamonds are found • • • Main Entry: ↑blue * * * blue ground, the rock in which diamonds are found. It is… …   Useful english dictionary

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  • blue ground — /ˈblu graʊnd/ (say blooh grownd) noun a blue grey decomposed agglomerate which contains diamonds, found in the diamond pipes of South Africa and Brazil …  

  • blue ground — noun another term for kimberlite …   English new terms dictionary

  • ground — 1 /graUnd/ noun EARTH SURFACE 1 (U) the surface of the earth: The leaf slowly fluttered to the ground. | The air raids were followed by military action on the ground. | below/above ground: miners working 10 hour shifts below ground compare floor… …   Longman dictionary of contemporary English

  • blue — bluely, adv. blueness, n. /blooh/, n., adj., bluer, bluest, v., blued, bluing or blueing. n. 1. the pure color of a clear sky; the primary color between green and violet in the visible spectrum, an effect of light with a wavelength between 450… …   Universalium

  • blue — 1. adj., n., & v. adj. 1 having a colour like that of a clear sky. 2 sad, depressed; (of a state of affairs) gloomy, dismal (feel blue; blue times). 3 indecent, pornographic (a blue film). 4 with bluish skin through cold, fear, anger, etc. 5 Brit …   Useful english dictionary

  • Blue print — Print Print, n. [See {Print}, v., {Imprint}, n.] 1. A mark made by impression; a line, character, figure, or indentation, made by the pressure of one thing on another; as, the print of teeth or nails in flesh; the print of the foot in sand or… …   The Collaborative International Dictionary of English

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