Record details

Title
    Crystallization history of Oligocene ijolitic rocks from the Doupovské hory Volcanic Complex (Czech Republic)
Author
    Haloda, Jakub
    Halodová, Patricie
    Holub, František
    Rapprich, Vladislav
    Vaculovič, Tomáš
Language
    anglicky
Publication type
    článek v periodiku
Source title - serial
    Journal of Geosciences
Vol./nr.
    Roč. 55, č. 3
Pages
    19
Year
    2010
Thesaurus term
    crystallization modelling
    Doupovské hory Mts.
    fractional crystallization
    ijolite
    melteigite
    Nephelinolite
    Nephelinolite, melteigite, ijolite, crystallization modelling, fractional crystallization, Doupovské hory Mts.
Keyword
    Complex
    Crystallization
    Czech
    Doupovské
    History
    Hory
    Ijolitic
    Oligocene
    Republic
    Rocks
    Volcanic
Abstract (in english)
   Ijolitic rocks of the Flurbühl Composite Intrusion rank to the most primitive intrusive rocks found within the Doupovské hory Volcanic Complex. Studies of mineral chemistry together with crystallization modelling of melteigite and ijolite brought new information about the evolution of ijolitic magmas and their ascent. Melteigite crystallized by early equilibrium crystallization under pressure of approximately 4 kbar (estimated minimum cooling rate is ~0.02 °C/hr) and subsequent fractional crystallization under much lower pressure (~0.2 kbar). Ijolite originated by fractional crystallization of a slightly more evolved magma batch under lower pressures probably at the final emplacement level. The results of crystallization modelling and estimates of REE contents in parental melts suggest a close genetic relationship between both rock suites. The olivine-bearing melteigite was postulated as a possible parental magma composition for derivation of the olivine-free ijolite.

   Ijolitic rocks of the Flurbühl Composite Intrusion rank to the most primitive intrusive rocks found within the Doupovské hory Volcanic Complex. Studies of mineral chemistry together with crystallization modelling of melteigite and ijolite brought new information about the evolution of ijolitic magmas and their ascent. Melteigite crystallized by early equilibrium crystallization under pressure of approximately 4 kbar (estimated minimum cooling rate is ~0.02 °C/hr) and subsequent fractional crystallization under much lower pressure (~0.2 kbar). Ijolite originated by fractional crystallization of a slightly more evolved magma batch under lower pressures probably at the final emplacement level. The results of crystallization modelling and estimates of REE contents in parental melts suggest a close genetic relationship between both rock suites. The olivine-bearing melteigite was postulated as a possible parental magma composition for derivation of the olivine-free ijolite.
Contributor
    Česká geologická služba
    UK Praha, Přírodovědecká fakulta
Contributor code
    ČGS (RIV)
    UK, PřF
Source format
    R
Import date
    8. 8. 2012
    15. 10. 2014