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Solidus and liquidus temperatures and mineralogies for anhydrous garnet-lherzolite to 15 GPaStrong convergence is noted, in experimental data for systems pertaining to anhydrous fertile garnet-lherzolite in the 6.5-15 GPa range, either to a common temperature or to temperatures differing by only about 100 C. The major element composition of magmas generated by even minor degrees of partial melting may be similar to the composition of the primordial, bulk silicate earth in an upper mantle stratigraphic column more than 160 km deep. Whether or not the solidus and liquidus intersect, the liquidus mineralogy for undepleted garnet-lherzolite compositions is found to change from olivine, at low pressures, to pyroxene, garnet, or a solid solution of both, at pressures greater than 10-15 GPa.
Document ID
19830057480
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Herzberg, C. T.
(Rutgers University New Brunswick, NJ, United States)
Date Acquired
August 11, 2013
Publication Date
May 1, 1983
Publication Information
Publication: Physics of the Earth and Planetary Interiors
Volume: 32
ISSN: 0031-9201
Subject Category
Geophysics
Accession Number
83A38698
Funding Number(s)
CONTRACT_GRANT: NAGW-177
Distribution Limits
Public
Copyright
Other

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