Journal
EARTH AND PLANETARY SCIENCE LETTERS
Volume 307, Issue 1-2, Pages 173-179Publisher
ELSEVIER
DOI: 10.1016/j.epsl.2011.04.027
Keywords
Moon; magma ocean; water; KREEP; mare basalt; picritic glass
Categories
Funding
- NSF
- NASA LASER
- NASA [NNG06G167G]
- Lunar Institute
- Direct For Mathematical & Physical Scien
- Division Of Astronomical Sciences [0747154] Funding Source: National Science Foundation
Ask authors/readers for more resources
Measurements of hydroxyl or water in lunar materials are being used to suggest that melting source regions within the Moon contained tens to hundreds of ppm water. The compositions of magmatic source regions in the Moon can be calculated using magma ocean fractional solidification models, given an initial bulk composition. Our magma ocean models demonstrate that to make a source region with 10 to 200 ppm water, the bulk magma ocean must contain 100 to 1000 ppm water or more (and in a 1000-km deep lunar magma ocean, 1000 ppm water is equivalent to similar to 5% of an Earth ocean by weight). As solidification of the magma ocean continues water and other incompatible elements are progressively enriched in the evolving liquids. The final KREEP-like liquids would contain the greatest fraction of water. We suggest that a bulk magma ocean with over similar to 100 ppm water is prohibited by constraints on these KREEP-like final magma ocean liquids, and by the thermodynamic equilibrium requirement with metallic iron in mare basalts. We conclude that bulk lunar interior water contents must be at the low end of the range posited by recent observations (
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available