Applications of dynamic crystallization studies - Lunar olivine-normative basaltsDynamic crystallization studies were performed on two synthetic glasses similar in composition to the mare olivine-normative basalt samples 12009 and 15555. The effects of viscosity (primarily a function of FeO) and the initial temperature of cooling on mineral chemistry, texture, and temperature of appearance of phases were investigated. Olivine compositions seem to indicate that, for the two types of melt cooled at the same rate, there are no significant differences in the degree of undercooling at which olivine nucleates, but it is found that olivine-nucleated densities differ. The cooling rate of 15555 is estimated. Since the temperature at which cooling is initiated affects texture, mineral chemistry, and temperature of appearance of phases so greatly, caution is recommended in the application of experimental data to natural rock systems.
Document ID
19780057743
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Bianco, A. S. (Tennessee Univ. Knoxville, TN, United States)
Taylor, L. A. (Tennessee, University Knoxville, Tenn., United States)