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Vapor-deposited digenite in Chang'e-5 lunar soil.
- Source :
-
Science Bulletin . Apr2023, Vol. 68 Issue 7, p723-729. 7p. - Publication Year :
- 2023
-
Abstract
- [Display omitted] Frequent impacts on the Moon have changed the physical and chemical properties of the lunar regolith, with new materials deposited from the impact-induced vapor phase. Here, we combined nanoscale chemical and structural analysis to identify the mineral digenite (4Cu 2 S·CuS) in Chang'e-5 lunar soil. This is the first report of digenite in a lunar sample. The surface-correlated digenite phase is undifferentiated in distribution and compositionally distinct from its hosts, suggesting that it originated from vapor-phase deposition. The presence of an Al-rich impact glass bead suggests that a thermal effect provided by impact ejecta is the main heat source for the evaporation of Cu-S components from a cupriferous troilite precursor, and the digenite condensed from these Cu-S vapors. A large pure metallic iron (Fe0) particle and high Cu content within the studied Cu-Fe-S grain suggest that this grain was most likely derived from a highly differentiated and reduced melt. [ABSTRACT FROM AUTHOR]
- Subjects :
- *LUNAR soil
*LUNAR craters
*VAPOR-plating
*GLASS beads
*COPPER
*CHEMICAL properties
Subjects
Details
- Language :
- English
- ISSN :
- 20959273
- Volume :
- 68
- Issue :
- 7
- Database :
- Academic Search Index
- Journal :
- Science Bulletin
- Publication Type :
- Academic Journal
- Accession number :
- 163165073
- Full Text :
- https://doi.org/10.1016/j.scib.2023.03.020