Computer Science
Scientific paper
Feb 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989gecoa..53..529n&link_type=abstract
Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 53, Feb. 1989, p. 529-541.
Computer Science
15
Kreep, Lunar Composition, Lunar Evolution, Magma, Petrology, Chemical Composition, Lithology, Lunar Geology, Selenology, Moon, Magma Ocean, Kreep, Origin, Formation, Composition, Petrogenesis, Enrichment, Models, Melting, Hypotheses, Parameters, Isotopes, Residue, Samples, Lunar, Silicate, Diagrams, Evolution, Fractionation, Rare Earth Elements, Potassium, Phosphorous
Scientific paper
The 'urKREEP' hypothesis of Warren and Wasson (1979) is extended by defining KREEP in terms of specific (i.e., constrained) lunar components. It is shown that, the presilicate liquid immiscibility (pre-SLI) composition can be obtained by recombining experimental data on KREEP basalt components, or by calculating from liquid-liquid Kd's. Both calculated urKREEP compositions were lower in MgO and Al2O3 and higher in FeO and P2O5 than reported low- and high-K KREEP compositions. The calculated REE abundances were higher and the REE profiles were slightly more LREE-enriched than the previously reported KREEP compositions.
Neal Chris R.
Taylor Lawrence A.
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