IMIS | Flanders Marine Institute
 

Flanders Marine Institute

Platform for marine research

IMIS

Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Printer-friendly version

Structure et volcanisme de la fosse de Valence (Méditerranée nord-occidentale)
Maillard, A.; Mauffret, A. (1993). Structure et volcanisme de la fosse de Valence (Méditerranée nord-occidentale). Bull. Soc. Géol. Fr. 164(3): 365-383
In: Bulletin de la Société Géologique de France. Société Géologique de France: Paris. ISSN 0037-9409, more
Peer reviewed article  

Available in  Authors 

Keywords
    Faults; Sedimentation; Seismic stratigraphy; Structural geology; Submarine features; Volcanism; MED, Spain, Valencia Trough [Marine Regions]; Marine

Authors  Top 
  • Maillard, A.
  • Mauffret, A.

Abstract
    The Valencia Trough is an aborted rift formed before the early Miocene opening of the Western Mediterranean sea. Its formation is linked to the opening of the Provencal basin, but also to the formation of the Betic-riff domain. We present a study of the structure and sedimentary history of the trough based on the VALSIS cruise seismic data, supplemented by several industrial lines, and the numerous wells of the Iberian margin. This structural study reveals an asymmetry of the margins, few superficial extensional features, the existence of several transverse structures trending N130 degree which segment the basin in different blocks, a widespread volcanism which conceals a part of the deep structures of the basin. This volcanism is differentiated into two types different in age and nature. The first one, characterized by calk-alkaline late Oligocene to middle Miocene volcanic rocks, is compared to the northwestern Mediterranean calk-alkaline volcanism. The second one is alkaline and recent. A schematic initial fit shows that the whole volcanism of the region is related to the formation of marginal basins behind an African subduction zone. A simple-shear model is presented.

All data in IMIS is subject to the VLIZ privacy policy Top | Authors