Geochemical characteristics and petrogenesis of phonolites and trachytic rocks from the České Středohoří Volcanic Complex, the Ohře Rift, Bohemian Massif

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F15%3A00443083" target="_blank" >RIV/61389005:_____/15:00443083 - isvavai.cz</a>
Alternative codes found
RIV/67985831:_____/15:00443083
Result on the web
<a href="http://dx.doi.org/10.1016/j.lithos.2015.03.014" target="_blank" >http://dx.doi.org/10.1016/j.lithos.2015.03.014</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.lithos.2015.03.014" target="_blank" >10.1016/j.lithos.2015.03.014</a>

Result language
angličtina
Original language name
Geochemical characteristics and petrogenesis of phonolites and trachytic rocks from the České Středohoří Volcanic Complex, the Ohře Rift, Bohemian Massif
Original language description
Trachyandesites, trachytes and phonolites represent the most evolved rock types within the České Středohoří Volcanic Complex (CSVC) in the Ohře/Eger Rift. The K?Ar ages of the suite range from ca 33.8 to ca 25.8 Ma. Major and trace element variation in the basanite ? trachybasalt ? trachyandesite series can be explained by several stages of modification of parental magmas by assimilation-fractional crystallization (AFC) involving fractionation of olivine, clinopyroxene, apatite, amphibole and Ti-oxide and bulk continental crust (BCC) as an assimilate. Two types of phonolites (type A and B phonolite) can be distinguished on the basis of overall REE patterns, Gd/Gd* ratios and Ba and Sr contents. Type B phonolites are depleted in Ba, Sr and MREE as a result of extensive alkali feldspar, plagioclase and amphibole fractionation. The Sr?Nd isotopic compositions in the samples can be explained with the assimilation of continental crust by such parental magmas. The highly radiogenic 87Sr/86Sr
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DD - Geochemistry
OECD FORD branch
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Project
<a href="/en/project/IAA3048201" target="_blank" >IAA3048201: Geochemistry of phonolitic-trachytic magmas: their sources and fractionation trends (examples from the Bohemian Massif)</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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