fr
Article scientifique
Accès libre
Anglais

Permo-Triassic stratigraphy of the pelagonian zone in central Evia Island (Greece)

Publié dansEclogae geologicae Helveticae, vol. 94, p. 289-311
Date de publication2001
Résumé

A new subdivision of the pre-Jurassic Pelagonian Units in central Evia island is proposed: these units are represented by syn- and post rift sequences, separated by a volcano-sedimentary episode. The syn-rift sequences comprise Permian siliciclastic sediments in Verrucano tectofacies. (Ano Mavropoulon Formation) and a small carbonate platform (Zigos Limestones) developed from the Permian to the Middle Anisian. The Ano Mavropoulon Fm. is subdivided into three members: - the lower member (Permian s.l. lying on the basement and characterised by medium-coarse clastic terrigenous sedimentation; - the middle member (Late Permian) Koprises limestones, made up of shallow-water limestones: - the upper member (Latest Permian-Early Triassic) comprising clastic terrigenous and minor reworked carbonate sediments. A regional unconformity (earliest Triassic) separates the Zigos Lm. from the top of the Ano Mavropoulon Fm. The peritidal carbonates belonging to the Zigos Lm. have been subdivided into three lithofacies ranging in age from Spathian to Pelsonian (late Early Triassic to Middle Anisian). The volcanic episode is well constrained in all the Pelagonian domain. In central Evia, it has been dated from Middle Anisian to Early Carnian. The sub-alkaline to alkaline basalts comprised in the volcano-sedimentary sequence (Volcano-sedimentary Complex) have a within-plate affinity. The volcanism occurs between the syn-rift and post-rift stages, and it is probably not linked to the passive margin evolution proper. The post-rift sequences are represented by the onset of the Pelagonian platform aggradation ("Pantokrator" Carnian to Middle-Late? Jurassic). The northern passive margin sequence of Pelagonia (palaeogeographic sense) is interpreted as related to the Maliak ocean opening during the Early Mesozoic.

Mots-clés
  • Greece
  • Permian
  • Triassic
  • Biostratigraphy
  • Passive margin sequences
  • Maliak ocean
  • Verrucano
Citation (format ISO)
DE BONO, Andréa et al. Permo-Triassic stratigraphy of the pelagonian zone in central Evia Island (Greece). In: Eclogae geologicae Helveticae, 2001, vol. 94, p. 289–311.
Fichiers principaux (1)
Article (Published version)
accessLevelPublic
Identifiants
  • PID : unige:40868
ISSN du journal0012-9402
854vues
264téléchargements

Informations techniques

Création11/10/2014 21:50:00
Première validation11/10/2014 21:50:00
Heure de mise à jour14/03/2023 21:50:50
Changement de statut14/03/2023 21:50:50
Dernière indexation16/01/2024 12:04:32
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack