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(Article of periodic en Français - 1978)

Document title

Subductions antérieures au charriage nord-sud de la croûte téthysienne: facteur de métamorphisme de séries sédimentaires et volcaniques liées aux assemblages ophiolitiques syro-turcs en schistes verts et amphibolites

Authors(s) and Affiliation(s)

PARROT J. F. ; WHITECHURCH H. ;

Abstract

The infra-ophiolitic metamorphic rocks occurring as tectonic slices under peridotites belong to the deep greenschists-amplibolites facies or to the blue schists facies. They would result from the transformation of oceanic supra-crustal volcano-sedimentary series, settled during expansion. The metamorphism would occur in an intra-oceanic subduction zone. The metamorphic conditions would vary with the subduction rate, giving from a similar material deep greenschists and amphibolites for a low speed and blue schists for a fast one. This genetical hypothesis leads the A. to present a model with consecutive and subparallel subduction minizones to explain particularities of the western Mediterranean ophiolitic assemblages. Those zones would be responsible for the general presence of deep greenschists and amphibolites at the base of three important ophiolitic belts crossing from West to East Turkey and North western Syria.

Source

Article of periodic

published at : Revue de géographie physique et de géologie dynamique Paris

Editor :

Millesime : 1978, vol. 20, no2 [pp. 153-211]

Language

Français

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