Titre
Radiolarian ages for the sedimentary cover of sevan ophiolite (Armenia, Lesser Caucasus)
Type
article
Institution
Externe
Périodique
Ofioliti
Auteur(s)
Asatryan, G.
Auteure/Auteur
Danelian, T.
Auteure/Auteur
Sosson, M.
Auteure/Auteur
Sahakyan, L.
Auteure/Auteur
Person, A.
Auteure/Auteur
Avagyan, A.
Auteure/Auteur
Galoyan, G.
Auteure/Auteur
Liens vers les personnes
ISSN
0391-2612
Statut éditorial
Publié
Date de publication
2010
Volume
35
Première page
91
Dernière page/numéro d’article
101
Résumé
Age data of Armenian ophiolites are of great importance for understanding the palaeogeographic and geodynamic evolution of Tethys in the Caucasus area and for lateral correlations of Tethyan ophiolitic belts in the Middle East area. Moderately well-preserved radiolarian assemblages obtained during this study from the Sarinar section of eastern Armenia allow to investigate the sedimentary and volcanic history recorded in a ca. 30 m-thick radiolarite sequence associated with spilitic lavas of the Sevan ophiolitic suture zone.
The latest Bajocian-early Bathonian assemblage yielded from a sample situated close to the base of the studied sequence suggests that radiolarian ooze accumulation took place on oceanic crust of late Middle Jurassic age (probably Bajocian). Several tuffite levels are intercalated within the lower to middle part of the radiolarite sequence; a late Bathonian-early Oxfordian assemblage from a sample taken just below the uppermost tuffitic bed, suggests that during this time the oceanic domain of Sevan ophiolites was close to subaerial volcanic activity.
The latest Bajocian-early Bathonian assemblage yielded from a sample situated close to the base of the studied sequence suggests that radiolarian ooze accumulation took place on oceanic crust of late Middle Jurassic age (probably Bajocian). Several tuffite levels are intercalated within the lower to middle part of the radiolarite sequence; a late Bathonian-early Oxfordian assemblage from a sample taken just below the uppermost tuffitic bed, suggests that during this time the oceanic domain of Sevan ophiolites was close to subaerial volcanic activity.
PID Serval
serval:BIB_F6D29A29D0C1
Date de création
2012-10-18T18:48:01.683Z
Date de création dans IRIS
2025-05-21T06:11:24Z