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Porosities of lunar meteorites: Strength, porosity, and petrologic screening during the meteorite delivery process

Warren, Paul H.

Journal of Geophysical Research: Planets, 2001-05, Vol.106 (E5), p.10101-10111 [Periódico revisado por pares]

Washington, DC: Blackwell Publishing Ltd

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  • Título:
    Porosities of lunar meteorites: Strength, porosity, and petrologic screening during the meteorite delivery process
  • Autor: Warren, Paul H.
  • Assuntos: Cosmochemistry. Extraterrestrial geology ; Earth sciences ; Earth, ocean, space ; Exact sciences and technology ; Meteorites. Tectites. Impactites
  • É parte de: Journal of Geophysical Research: Planets, 2001-05, Vol.106 (E5), p.10101-10111
  • Notas: ArticleID:2000JE001283
    istex:4FA0CD7F51ADFEEEFB943034A02C1723A3A8EC82
    ark:/67375/WNG-74H6SN05-8
  • Descrição: 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.
  • Editor: Washington, DC: Blackwell Publishing Ltd
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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