Composition and petrology of fragment 24182
Abstract
A detailed study of sample 24182 from Mare Crisium indicates that it is made up of olivine with 22% fayalite, containing polymineral inclusions consisting of bronzite and microscopic amounts of amphibole and magnetite. It is suggested that the source of the sample is high-magnesium dunite or troctolite of deep origin. Recrystallization under conditions of high partial oxygen pressure led to the appearance of an association of bronzite, amphibole, and magnetite that is extraordinary for lunar rocks. A short-duration impact process led to the fragmentation of the sample and to the penetration of an ultrabasic melt into it. It is suggested that 24182 may have originated from an olivine achondrite.
- Publication:
-
Lunar Soil from Mare Crisium
- Pub Date:
- 1980
- Bibcode:
- 1980lsmc.book..147L
- Keywords:
-
- Lunar Composition;
- Lunar Geology;
- Lunar Rocks;
- Lunar Soil;
- Minerals;
- Petrology;
- Achondrites;
- Amphiboles;
- Dunite;
- Fayalite;
- Lunar Maria;
- Magnetite;
- Olivine;
- Recrystallization;
- Lunar and Planetary Exploration