Computer Science
Scientific paper
Feb 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982e%26psl..57..336d&link_type=abstract
Earth and Planetary Science Letters, vol. 57, no. 2, Feb. 1982, p. 336-344.
Computer Science
7
Basalt, Granite, Lunar Rocks, Precipitation (Chemistry), Zirconium Oxides, Crystallization, Magma, Temperature Dependence, Moon, Basalts, Granites, Zircon, Saturation, Temperature, Magmas, Data, Trace Elements, Crystallization, Evolution, Experiments, Procedure, Analysis, Composition, Oxides, Petrology, Samples, Lunar, 12013, 14310, 15382, 70017, 60335, Concentrations, Solubility, Abundance, Models, Geochemistry
Scientific paper
The saturation surface for zircon in late-stage lunar basalts and granites has been determined over the temperature range 1400-1070 C. The saturation surface in the basalt shows a strong temperature dependence from 1400 to 1200 C. Below 1200 deg, the saturation surface turns down sharply and becomes nearly temperature independent. The saturation surface in the granitic composition is similar to the basaltic composition, although less Zr is required for saturation. At 1100 C, 9000 ppm Zr and 5000 ppm Zr are required for zircon saturation in the basalt and granite, repectively. If a magma with chondritic Zr content is assumed, then zircon saturation would not be reached until 99.96-99.92% crystallization. This precludes zircon crystallization playing a major role in the trace element evolution of lunar magmas.
Dickinson James E. Jr.
Hess Paul C.
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