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
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DOI - Digital Object Identifier
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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
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
DB - Geology and mineralogy
OECD FORD branch
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Result continuities
Project
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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
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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
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