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(Article of periodic en Anglais - 2007)

Document title

Alpine ocean seafloor spreading and onset of pelagic sedimentation : new radiolarian data from the Chenaillet-Montgenèvre ophiolite (French-Italian Alps)

Authors(s) and Affiliation(s)

CORDEY F. ; BAILLY A. ;

Abstract

Radiolarians of Middle Jurassic age provide the first direct age determination from oceanic sediments associated with the Chenaillet-Montgenèvre ophiolite (Piemonte zone). This datum obtained from radiolarites of the Lago Nero-Replatte thrust sheet is older than those previously established on ophiolite sedimentary covers from this segment of the western Alps. This chronological relationship implies either a late seafloor spreading-related magmatic activity in places younger than adjacent initial pelagic sedimentation, or more likely that the Lago Nero-Replatte and the Chenaillet s.s. thrust sheets are distinct and distant pieces of lithosphere. These results strengthen the Bathonian correlation of widespread seafloor spreading in both western Tethys and the central Atlantic ocean

Source

Article of periodic

published at : Geodinamica acta / ISSN 0985-3111

Editor : Taylor & Francis, Abingdon - ROYAUME-UNI (1987)

Millesime : 2007, vol. 20, no3 [pp. 131-138]

Bibliographic references : 35 ref.

Collation : Illustration ;

Language

Anglais

INIST-CNRS, Cote INIST : 21088

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2007.
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