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Experimental partitioning of rare earth elements and scandium among armalcolite, ilmenite, olivine and mare basalt liquidAn experimental study was carried out to measure partition coefficients for two rare-earth elements (Sm and Tm) and Sc among armalcolite, ilmenite, olivine and liquid coexisting in a system modeled on high-Ti mare basalt 74275. This 'primitive' sample was chosen for study because its major and trace element chemistry as well as its equilibrium phase relations at atmospheric pressure are known from previous studies. Beta-track analytical techniques were used so that partition coefficients could be measured in an environment whose bulk trace element composition is similar to that of the natural basalt. Partition coefficients for Cr and Mn were determined in the same experiments by microprobe analysis. The only equilibrium partial melting model appears to be one in which ilmenite is initially present in the source region but is consumed by melting before segregation of the high-Ti mare basalt liquid from the residue.
Document ID
19790055121
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Irving, A. J.
(Lunar and Planetary Inst. Houston, TX, United States)
Merrill, R. B.
(Lunar and Planetary Inst. Houston, TX, United States)
Singleton, D. E.
(Lunar and Planetary Institute Houston, Tex., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1978
Subject Category
Lunar And Planetary Exploration
Meeting Information
Meeting: Lunar and Planetary Science Conference
Location: Houston, TX
Start Date: March 13, 1978
End Date: March 17, 1978
Accession Number
79A39134
Funding Number(s)
CONTRACT_GRANT: NSR-09-051-001
Distribution Limits
Public
Copyright
Other

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