An example of high-pressure low-temperature metamorphic rocks from an island-arc: the Paikon Series (Innermost Hellenides, Greece) |
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| Authors: | F BAROZ J BEBIEN M IKENNE |
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| Institution: | Universitéde Nancy I, Laboratoire de Pétrologie, Boite Postale 239, 54506 Vandoeuvre-lès-Nancy Cedex, France |
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| Abstract: | Abstract The Paikon Series is considered to be a volcanic arc sequence with a mainly neritic sedimentary sequence and bimodal tholeiitic volcanism of early Mesozoic age. The metamorphic assemblages are syn- to post-kinematic with respect to a pre-Tithonian tectonic phase and range from the lawsonite-chlorite-albite facies through transitional Na-amphibole-greenschist facies to the chlorite sub-zone of the greenschist facies. The metamorphic imprint of the Paikon Series corresponds to a temperature range from less than 330° C to ± 450° C under a total pressure from 3 kbar to 6–7 kbar. The overprinting of these facies on an earlier blueschist assemblage, related either to a subduction zone or to a tectonic overpressure caused by thrusting, is suspected. |
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| Keywords: | Key-words: blueschist facies greenschist facies Hellenides Greece lawsonite |
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