Other formats:
BibTeX
LaTeX
RIS
@article{1168323,
author = {Ackerman, Lukáš and Špaček, Petr and Magna, Tomáš and Ulrych, Jaromír and Svojtka, Martin and Hegner, Ernst and Balogh, Kadosa},
article_location = {OXFORD},
article_number = {12},
doi = {http://dx.doi.org/10.1093/petrology/egt059},
keywords = {peridotite; metasomatism; subcontinental lithosphere; Sr-Nd-Li isotopes; microstructure},
language = {eng},
issn = {0022-3530},
journal = {Journal of Petrology},
title = {Alkaline and Carbonate-rich Melt Metasomatism and Melting of Subcontinental Lithospheric Mantle: Evidence from Mantle Xenoliths, NE Bavaria, Bohemian Massif},
volume = {54},
year = {2013}
}
TY - JOUR
ID - 1168323
AU - Ackerman, Lukáš - Špaček, Petr - Magna, Tomáš - Ulrych, Jaromír - Svojtka, Martin - Hegner, Ernst - Balogh, Kadosa
PY - 2013
TI - Alkaline and Carbonate-rich Melt Metasomatism and Melting of Subcontinental Lithospheric Mantle: Evidence from Mantle Xenoliths, NE Bavaria, Bohemian Massif
JF - Journal of Petrology
VL - 54
IS - 12
SP - 2597-2633
EP - 2597-2633
PB - Oxford University Press
SN - 00223530
KW - peridotite
KW - metasomatism
KW - subcontinental lithosphere
KW - Sr-Nd-Li isotopes
KW - microstructure
N2 - Peridotite xenoliths hosted by Cenozoic basanite lava flows (21 center dot 2-23 center dot 5 Ma) occur at several localities in the western continuation of the Ohre/Eger rift (Central European Volcanic Province) in NE Bavaria, Bohemian Massif. Detailed petrography, major and trace element compositions of whole-rock samples and selected mineral phases as well as Sr-Nd-Li isotopic compositions for a suite of mantle xenoliths from Zinst, Hirschentanz and Teichelberg document variable degrees of partial melting and metasomatism. Melting models based on whole-rock major element composition and Cr# of spinel indicate similar to 6-30% melting in the spinel stability field. Subsequent metasomatism by alkaline and carbonate-rich melts resulted in modal and cryptic metasomatism, expressed by the presence of carbonate-bearing silicate melt pockets with complex secondary mineral assemblages and by enrichment in light rare earth elements, Li, Rb, U, Pb, high field strength elements and P. The carbonate is most probably associated with fractionation of the Na-rich silicate melt. High P contents, variable but low to negative delta Li-7 values from +2 center dot 5 to -9 center dot 7 parts per thousand, coupled with Sr-87/Sr-86 ratios between similar to 0 center dot 7032 and similar to 0 center dot 7041 may reflect a significant contribution of recycled crustal material such as eclogite in the infiltrating melts responsible for metasomatism, although the Li isotope compositions may reflect kinetic modifications through diffusion. The trace element geochemistry of clinopyroxene, carbonate and melt pockets suggests that clinopyroxene plays a very important role in fractionation of the rare earth elements, high field strength elements and Sr, whereas carbonate does not host large quantities of incompatible trace elements except for Sr, Ba and, to a lesser extent, Th and U.
ER -
ACKERMAN, Lukáš, Petr ŠPAČEK, Tomáš MAGNA, Jaromír ULRYCH, Martin SVOJTKA, Ernst HEGNER and Kadosa BALOGH. Alkaline and Carbonate-rich Melt Metasomatism and Melting of Subcontinental Lithospheric Mantle: Evidence from Mantle Xenoliths, NE Bavaria, Bohemian Massif. \textit{Journal of Petrology}. OXFORD: Oxford University Press, 2013, vol.~54, No~12, p.~2597-2633. ISSN~0022-3530. Available from: https://dx.doi.org/10.1093/petrology/egt059.
|
