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Geochemistry of a dismembered metaophiolite complex, Letovice, Czechoslovakia

Published online by Cambridge University Press:  03 November 2011

E. Jelínek ,
M. Pačesová ,
Z. Mísař ,
P. Martinec  and
Z. Weiss
E. Jelínek
Affiliation:
Faculty of Science, Charles University, Albertov 6, 128 43 Prague 2, Czechoslovakia.
M. Pačesová
Affiliation:
Faculty of Science, Charles University, Albertov 6, 128 43 Prague 2, Czechoslovakia.
Z. Mísař
Affiliation:
Faculty of Science, Charles University, Albertov 6, 128 43 Prague 2, Czechoslovakia.
P. Martinec
Affiliation:
Coal Research Institute, 716 07 Ostrava-Radvanice, Czechoslovakia.
Z. Weiss
Affiliation:
Coal Research Institute, 716 07 Ostrava-Radvanice, Czechoslovakia.
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Abstract

The origin of a suite of ultrabasic and basic rocks from the Letovice crystalline complex in the eastern part of the Bohemian massif, Czechoslovakia, is discussed on the basis of new geological and geochemical data. Strongly serpentinised spinel peridotites, plagioclase peridotites and pyroxenites, together with metagabbros, amphibolites and minor dykes of metadolerite, make up about 70% of the complex; metasediments, mainly mica schists, make up the remaining 30%. The ultramafic and mafic rocks constitute parts of a dismembered ophiolite considered to have been formed in the Cadomian episode. They show effects of polyphase deformation and were variously metamorphosed under conditions of greenschist to garnet amphibolite fades at 400–600°C and 2–5 kb. Geochemical features of the ultrabasic suite are similar to those of other ophiolite complexes, such as those of Bay of Islands, Oman, Papua, Pindos, Sarmiento and Troodos and are likely to be products of a marginal sea environment.

Keywords

amphiboliteBohemian massifmetagabbrometamorphismocean-floor basaltperidotitepetrochemical plottectonismtholeiite.
Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 75 , Issue 1 , 1984 , pp. 37 - 48
Copyright
Copyright © Royal Society of Edinburgh 1984

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