The variable carbon isotopic composition of type 3 ordinary chondrites.

M. M. Grady, P. K. Swart, C. T. Pillinger

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25 Scopus citations


Bulk carbon abundances and 13C values for 10 LL, 7 L and 15 H chondrites of petrologic types 3-6 were obtained by combustion. Carbon in types 4-6 is isotopically lighter (in the range -25 to -30per mille) and less variable than in type 3 (-11 to -28per mille). There is no simple relationship between C concentration and its isotopic composition; several C phases of different isotopic composition may be present in variable proportions. Antarctic meteorites released heavier CO2 during H3PO4 treatment than non-Antarctic finds. The heavier isotopic composition of type 3 meteorites may be due in part to the presence of a graphite-magnetite phase. -B.M.

Original languageEnglish (US)
Pages (from-to)A289-A296
JournalJournal of Geophysical Research
Issue numberSupplement
StatePublished - Jan 1 1982
Externally publishedYes

ASJC Scopus subject areas

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology


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