CE49 - Planétologie, structure et histoire de la Terre

Bay of Biscay: a keystone for plate kinematics – FirstMove

Submission summary

As two tectonic plates drift away, the movements prior to oceanic crust formation are ill-constrained. We are convinced that the kinematic models of plate movements could be significantly enhanced by focusing on the first ten million years of divergence. During this phase of transition several problems arise. Firstly, the classical interpretations of magnetic anomalies are not trustworthy (debated geometry and/or origin of anomalies). Secondly, the movements are more complex than in oceanic domain (polyphase deformation, obliquity, asymmetry). Those particularities occur especially if plate breakup happens in magma-poor conditions (in about 50% of instances). In the Bay of Biscay, the OPEN-BAY and BREOGHAM geophysical surveys and the GALINAUTE dives samples will allow to better constrain this magma-poor transition, and thus the movement between Europe and Iberia Plates. The consequent aim is to apply the new methodologies and tested concepts worldwide.

Project coordination

Julia Autin (Institut Terre Environnement Strasbourg)

The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.

Partner

ITES Institut Terre Environnement Strasbourg

Help of the ANR 412,339 euros
Beginning and duration of the scientific project: April 2022 - 48 Months

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