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The lamprophyre problem: Return to the roots

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F11%3APU97427" target="_blank" >RIV/00216305:26110/11:PU97427 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    The lamprophyre problem: Return to the roots

  • Original language description

    The term lamprophyre has been introduced in 1874 by Gümbel for Variscan mafic post-collisional dykes from the Bohemian Massif characterized by phenocrysts of mafic mica embedded in a feldspar groundmass (minette and kersantite type). In analogy to these, Rosenbusch in 1887 added the amphibole-bearing types such as vogesite and camptonite, from which spessartite was subsequently distinguished. Unfortunately, during the 20th century, petrologists enlarged this ill-understood group by incorporating different rocks containing mafic phenocrysts, such as kimberlites, lamproites, nepheline-, leucite- and melilite-bearing rocks. This resulted in a single large supergroup of polygenetic rocks termed the lamprophyre clan. In contrast, recent understanding of lamprophyres provides a sound basis for rejecting such a variable group of polygenetic origin. As true lamprophyres, we can now recognize five original types (endmembers) among which there are continuous transitions: minette, kersantite, vogesite, spessartite and partly camptonite (in the original sense). It is important to note, that not every rock labelled as a true lamprophyre falls into this group. For example a peralkaline minette is not a lamprophyre but very probably corresponds to a lamproite. Since the term camptonite is usually used for an alkaline lamprophyre variety (in fact volatile-rich basalt), I recommend not to use it in context with the true lamprophyres. Lamprophyre varieties containing kaersutitic amphibole can be easily described as titanospessartite or titanovogesite, respectively. Moreover, the last proposed variety fills the gap in the current nomenclature.

  • Czech name

  • Czech description

Classification

  • Type

    D - Article in proceedings

  • CEP classification

    DB - Geology and mineralogy

  • OECD FORD branch

Result continuities

  • Project

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2011

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Article name in the collection

    Goldschmidt Conference Abstracts

  • ISBN

    978-1-86239-207-6

  • ISSN

    0026-461X

  • e-ISSN

  • Number of pages

    1

  • Pages from-to

    1241-1241

  • Publisher name

    Mineralogical Society of Great Britain and Ireland

  • Place of publication

    Spojené království Velké Británie a Severního Ir

  • Event location

    Zlatibor

  • Event date

    Aug 14, 2011

  • Type of event by nationality

    EUR - Evropská akce

  • UT code for WoS article