Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Any of several intermediate igneous rocks constituting feldspar and ferromagnesium minerals that occur as dikes and minor intrusions.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An uncommon, small-volume ultrapotassic igneous rock primarily occurring as dikes, lopoliths, laccoliths, stocks and small intrusions.

from The Century Dictionary and Cyclopedia

  • n. The name given by Gümbel to rocks, considerably varied in lithological character, occurring in dikes in strata of Paleozoic age.

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

German Lamprophyr : Greek lampros, clear (from lampein, to shine) + French porphyre, porphyry (from Old French porfire; see porphyry).

from Wiktionary, Creative Commons Attribution/Share-Alike License

Ancient Greek λαµπρός (lamprós) = "bright" and φύρω (phýro) = "to mix".

Examples

  • The occurrence of low-volatile coal in certain coalfields in India is attributed to the carbonization of coal seams by the intrusion of mica lamprophyre which is a mica-rich ultrabasic rock containing altered olivine, calcite (or dolomite), bronze-coloured mica and apatite.

    4.1 Geological investigations

  • In Fergus County, Montana, they are mined from decomposed dikes of lamprophyre (a basic igneous rock).

    The Economic Aspect of Geology

  • This is strikingly similar to the Company's "Mockingbird" Gold Property geology, where the gold is also hosted in lower plate Precambrian gneiss, and is frequently associated spatially with lamprophyre dikes.

    Marketwire - Breaking News Releases

  • - A 9.3 kilogram sample of lamprophyre core from one of the drill holes contained 4 macro-diamonds, the largest being 1. 36mm by 1. 20mm by 1. 12mm, and 91 micro-diamonds.

    Marketwire - Breaking News Releases

  • - Moreover, a zone of lamprophyre dykes and lamprophyric breccias has been delineated within a

    Marketwire - Breaking News Releases

  • Exploration by IMMC has focused on only two of the more than 20 known lamprophyre zones.

    Marketwire - Breaking News Releases

  • Follow up work will focus on assessment of priority kimberlite targets and additional evaluation of the most prospective of the lamprophyre breccias.

    Marketwire - Breaking News Releases

  • - This diamond discovery was from a multi-phased xenolith-bearing lamprophyre dyke system, approximately 6 metres wide in its surface exposure.

    Marketwire - Breaking News Releases

  • The diamond-bearing lamprophyre breccia is coincident with a crudely circular magnetic low as defined by an airborne magnetic survey.

    Marketwire - Breaking News Releases

  • Drillholes LR-026 and LR-027 show the halo mineralization is concentrated at the intersection of northwest oriented lamprophyre dike and northeast trending fractured zone.

    Marketwire - Breaking News Releases

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