Alkali gabbronorite, ultra-KREEPy melt rock and the diverse suite of clasts in North Ray crater feldspathic fragmental breccia 67975

Conference · Thu Nov 15 04:00:00 EST 1984 · JGR, J. Geophys. Res., (Sect.) C:; (United States)

OSTI ID:5822599

Lindstrom, M M

Lunar breccia 67975 is a feldspathic fragmental breccia from North Ray crater, Apollo 16. It contains clasts of alkali gabbronorite and ultra-KREEPy mafic fragment-laden melt breccias, which are unique among Apollo 16 samples. Both are alkali- and iron-rich rocks with moderate to high REE concentrations. They more strongly resemble Apollo 14 gabbronorites and alkali anorthosites and KREEP-rich rocks than they do other Apollo 16 samples. The other clasts in 67975 are the ferroan anorthosites, feldspathic melt rocks, and magnesian granulites, which are typical of other feldspathic fragmental breccias. Examination of bulk and mineral compositions of other breccias and melt rocks suggests that alkali gabbronorite may be a minor component in other North Ray crater breccias and feldspathic melt rocks. This implies that alkali gabbronorite was a fairly early (4.0 b.y.) crustal component in the North Ray crater region.

• Research Organization: Washington University, St. Louis, MO
• OSTI ID: 5822599
• Report Number(s): CONF-840385-
• Conference Information: Journal Name: JGR, J. Geophys. Res., (Sect.) C:; (United States) Journal Volume: 89
• Country of Publication: United States
• Language: English

Related Subjects

640107* -- Astrophysics & Cosmology-- Planetary Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACTIVATION ANALYSIS
ALKALI METAL COMPOUNDS
APOLLO PROJECT
BARYON REACTIONS
CHEMICAL ANALYSIS
CHEMISTRY
CHONDRITES
CRYSTAL STRUCTURE
ELEMENTS
FELDSPARS
GEOCHEMISTRY
GEOLOGY
GRANULAR MATERIALS
HADRON REACTIONS
LUNAR MATERIALS
MATERIALS
METALS
METEORITES
MICROSTRUCTURE
MINERALS
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
PETROGRAPHY
PETROLOGY
RARE EARTHS
STONE METEORITES