UMR 5672

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Looking for solidified magma reservoirs on the terrestrial planets using a model of elastic-plated gravity currents

Chloé Michaut (Laboratoire de Géologie de Lyon)
Looking for solidified magma reservoirs on the terrestrial planets using a model of elastic-plated gravity currents

Valentine dome on the Moon, that probably results from a shallow magma intrusion

When Mar 12, 2018
from 11:00 AM to 12:00 PM
Where Amphi. Schrödinger
Attendees Chloé Michaut
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On terrestrial planets, volcanism is a ubiquitous process leading to the formation of edifices and lava flows at the surface that can be gigantic. However, many flows, if not most of them, occur within the crust. On Earth, it is estimated that the volume of magma emplaced within the crust as “intrusions” is about ten times greater than the volume of lava emitted on the surface.

Magmatism results in specific surface structures and deformations. A model for the flow of viscous magma under an elastic plate and on a rigid substrate is developed and used to study the process of magmatism on the terrestrial planets. The flow is weakly dependent on the conditions of the front. The different flow regimes result in specific shapes for the flow and induced surface deformation.

This model is used to detect solidified magma reservoirs in the subsurface of planets and to constrain the geological evolution of their crusts.

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