HYBRIDIZATION OF MINGLING MAGMAS WITH DIFFERENT DENSITIES

Research areas:

• Intérieurs planétaires (2011 - 2016)

Year:

1994

Authors:

• Olivier Grasset
• F ALBAREDE

Journal:

EARTH AND PLANETARY SCIENCE LETTERS

Volume:

121

Number:

3-4

Pages:

327-332

Month:

February

ISSN:

0012-821X

BibTex:

@article{WOS:A1994MZ83600005, author = "Olivier Grasset and F ALBAREDE", abstract = "It is usually assumed that chemical exchange between mafic enclaves considered as blobs of mafic liquids and their host silicic melt proceeds through static diffusion. However, the chemical boundary layer should keep the interior of magmatic enclaves nearly pristine, a feature which is not observed. The surface layer of a mafic blob falling in a more silicic melt is likely to be continuously folded in with the inner part. A numerical model shows that buoyancy-driven forced convection is an efficient way of enhancing the rate at which melt inclusions become hydrous and hybridized by the host melt.", doi = "10.1016/0012-821X(94)90075-2", extra = "PICL", issn = "0012-821X", journal = "EARTH AND PLANETARY SCIENCE LETTERS", month = "FEB", number = "3-4", pages = "327-332", title = "{HYBRIDIZATION} {OF} {MINGLING} {MAGMAS} {WITH} {DIFFERENT} {DENSITIES}", volume = "121", year = "1994", }

Abstract:

It is usually assumed that chemical exchange between mafic enclaves
considered as blobs of mafic liquids and their host silicic melt
proceeds through static diffusion. However, the chemical boundary layer
should keep the interior of magmatic enclaves nearly pristine, a feature
which is not observed. The surface layer of a mafic blob falling in a
more silicic melt is likely to be continuously folded in with the inner
part. A numerical model shows that buoyancy-driven forced convection is
an efficient way of enhancing the rate at which melt inclusions become
hydrous and hybridized by the host melt.