Other
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001jgr...10610101w&link_type=abstract
Journal of Geophysical Research, Volume 106, Issue E5, p. 10101-10112
Other
14
Planetology: Solid Surface Planets, Planetology: Solar System Objects, Planetology: Solar System Objects: Meteorites And Tektites, Planetology: Solar System Objects: Moon
Scientific paper
Porosity has been directly measured for eight lunar meteorite breccias and calculated for two more on the basis of literature density measurements. Lunar meteorite regolith breccias display systematically low porosity in comparison to otherwise analogous Apollo regolith breccias. Among seven meteoritic regolith breccias, porosity ranges from 1 to 11% and averages 7.5+/-(1-σ)3.2%, whereas for 44 analogous Apollo samples (porosities mostly calculated from literature density data) the average is 25+/-(1-σ)7%. The origin of this disparity is enigmatic, but the trend probably reflects mainly a bias in favor of strong, compact breccias among fragments that manage to survive the violent process of launch to lunar escape velocity (2.38 km/s). In addition, compaction during launch may play an important role. The population of lunar meteorites is clearly not a random, unmodified sample of lithic materials near the surface of the parent body.
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