Geothermometers for olivine-melt and pyroxene-melt equilibria in lunar basalts
Abstract
Data on the distribution of petrogenic elements between the Fe-Mg-silicates in lunar basalt melts were used to derive equilibrium equations for olivine-melt, augite-melt, and pigeonite-melt. Using these equations as geothermometers, it was possible to calculate temperatures of crystallization of lunar olivines and pyroxenes with an accuracy of + or - 10 C. The contents of femic phases could be calculated with an accuracy of 1-2 mol pct Fo. New augite-melt and pigeonite-melt geothermometers for terrestrial basalts are proposed.
- Publication:
-
Geokhimiia
- Pub Date:
- October 1989
- Bibcode:
- 1989Geokh.....1418A
- Keywords:
-
- Crystallization;
- Lunar Rocks;
- Melts (Crystal Growth);
- Olivine;
- Pyroxenes;
- Temperature Distribution;
- Chemical Equilibrium;
- Mineralogy;
- Regression Analysis;
- Selenology;
- Temperature Dependence;
- Titanium Compounds;
- Lunar and Planetary Exploration