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Magma oceanography. I - Thermal evolutionFractional crystallization and flotation of cumulate plagioclase in a cooling 'magma ocean' provides the simplest explanation for early emplacement of a thick feldspar-rich lunar crust. The complementary mafic cumulates resulting from the differentiation of such a magma ocean have been identified as the ultimate source of mare basalt liquids on the basis or rare-earth abundance patterns and experimental petrology studies. A study is conducted concerning the thermal evolution of the early differentiation processes. A range of models of increasing sophistication are considered. The models developed contain the essence of the energetics and the time scale for magma ocean differentiation. Attention is given to constraints on a magma ocean, modeling procedures, single-component magma oceans, fractionating magma oceans, and evolving magma oceans.
Document ID
19780057679
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Solomon, S. C.
(Massachusetts Inst. of Tech. Cambridge, MA, United States)
Longhi, J.
(MIT Cambridge, Mass., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1977
Subject Category
Lunar And Planetary Exploration
Meeting Information
Meeting: Lunar Science Conference
Location: Houston, TX
Start Date: March 14, 1977
End Date: March 18, 1977
Accession Number
78A41588
Funding Number(s)
CONTRACT_GRANT: NSG-7081
CONTRACT_GRANT: NSG-7297
Distribution Limits
Public
Copyright
Other

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