Modelling mid-crustal migmatite terrains as feeder zones for granite plutons: the competing dynamics of melt transfer by bulk versus porous flow

Détails

ID Serval
serval:BIB_46E7AD536A40
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Modelling mid-crustal migmatite terrains as feeder zones for granite plutons: the competing dynamics of melt transfer by bulk versus porous flow
Périodique
Transactions of the Royal Society of Edinburgh: Earth Sciences
Auteur(s)
Olsen S. N., Marsh B. D., Baumgartner L. P.
ISSN
0263-5933
ISSN-L
1473-7116
Statut éditorial
Publié
Date de publication
03/2004
Peer-reviewed
Oui
Volume
95
Pages
49-58
Langue
anglais
Résumé
The common association of mid-crustal migmatites with an upper-level granite pluton could indicate that the migmatites are a feeder zone for the pluton. If magma from a deeper level pervasively intrudes a high temperature metamorphic complex, most of the intruded magma would not freeze because of the prevailing temperature. The interaction between the magma and country rocks, which could include partial melting and crystallisation of the magma passing through, would modify magma to a more granitic composition, as found in the higher-level pluton.
The physical aspect of the magma transport through such a hot feeder zone is modelled by introducing a dimensionless melt transport (MT) number, which is the ratio of the rate of melt movement caused by the bulk flow of the entire mass (melt+solid) to that of porous media flow of melt only through the solid framework. The MT number is strongly dependent on the melt content of the melt-rich zone (MRZ), the diameter of the MRZ and typical particle size in the MRZ.
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Création de la notice
16/07/2018 15:45
Dernière modification de la notice
08/12/2018 7:10
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