Pristine highland clasts in consortium breccia 14305 Petrology and geochemistry

Details Pristine highland clasts in consortium breccia 14305 Petrology and geochemistry Pristine highland clasts in consortium breccia 14305 Petrology and geochemistry

Nov 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984lpsc...15...25s&link_type=abstract

(Lunar and Planetary Institute, NASA, American Geophysical Union, et al., Lunar and Planetary Science Conference, 15th, Houston,

Physics

12

Breccia, Geochemistry, Highlands, Lunar Composition, Lunar Crust, Petrology, Abundance, Apollo 14 Flight, Apollo 16 Flight, Basalt, Electron Probes, Microstructure, Rare Earth Elements, Moon, Highlands, Clasts, Breccias, Apollo 14, 14305, Samples, Lunar, Petrology, Geochemistry, Comparisons, Crust, Alkali, Anorthosite, Compositon, Mineralogy, Trace Elements, Abundance, Fractionation, Magma, Formation, Parent Material, Source, Mixing, Kreep

Scientific paper

Data are presented on the petrography and mineral chemistry of six pristine highland clasts chipped from the polymict lunar breccia 14305. Major and trace elements in the clasts were determined by instrumental neutron activation analysis, and mineral analyses were performed by electron microprobe. Mg-suite clasts have 'eastern' geochemical affinities, reaffirming the importance of local variations in geochemistry. These local variations are superimposed on the moon-wide, longitudinal variations noted by Warren and Wasson (1980). Alkali anorthosites and Mg-suite troctolites and anorthosites are not comagmatic, and cannot be related to a single parent magma by either fractional crystallization or variable assimilation of KREEP. Both magma suites may have assimilated varied amounts of KREEP into distinct parent magmas. Alternatively, alkali anorthosites may have crystallized directly from a KREEP-basalt parent magma. A thick crust of ferroan anorthosite probably never existed on the western lunar nearside, or was removed by basin-forming impacts prior to intrusion of later plutonic suites.

Affiliated with

Also associated with

No associations

Rating

Pristine highland clasts in consortium breccia 14305 Petrology and geochemistry does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Pristine highland clasts in consortium breccia 14305 Petrology and geochemistry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pristine highland clasts in consortium breccia 14305 Petrology and geochemistry will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1755242