| Barraud,
J., Gardien, V., Allemand, P. and Grandjean, P. 2001. Strain-dependence
of the melt migration in partially molten crustal rocks. In: Ailleres,
L. and Rawling, T. 2001. Animations in Geology. Journal of the Virtual Explorer,
4. |
|
Joseph
Barraud, Véronique Gardien, Pascal Allemand, Philippe Grandjean
Laboratoire
Dynamique de la Lithosphere, UCB-ENS Lyon, France.
Abstract
Progressive horizontal shortening of a partially molten layer
of microcrystalline paraffin wax is shown under the form of a movie. During
the folding, the melt segregates into foliation-parallel veins. The distribution
of the melt becomes heterogeneous and varies at each increment of deformation
because veins may subsequently disappeared. A dilatancy-pumping mechanism
is clearly observable. It allows the pervasive horizontal migration of
the melt from the layer to the outside of the layer. The melt extraction
occurs by pulses in a periodic manner.
Index:
Introduction
Analog
materials and scaling of the experiment
Description
of the movie
Discussion
and conclusion
Acknowledgements
References
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