Density crossovers in lunar picrites

Mathematics – Logic

Scientific paper

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Lunar Composition, Density Distribution, Glass, Basalt, Lunar Maria, Silicates, Pressure Effects, Temperature Effects, Melting

Scientific paper

We report experimental confirmation of crystal/liquid density crossovers in two 'pristine' lunar picritic glasses. Pristine lunar glasses are logical candidates for study of mare basalt petrogenesis because they seem to represent the most primitive mare basalt compositions available. The information gained from these experiments can also be used to elucidate the effect of pressure, temperature, and composition on silicate melt bulk modulus (K). Our evaluation of data on high-Ti lunar picrite (Apollo 14 black glass) suggests that dK/dT and dK/dP (K-prime) change significantly with temperature and pressure. Our analysis also indicates that K-prime may vary with melt composition.

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