Carbonaceous chondrites. I - Characterization and significance of carbonaceous chondrite /CM/ xenoliths in the Jodzie howardite

Details Carbonaceous chondrites. I - Characterization and significance of carbonaceous chondrite /CM/ xenoliths in the Jodzie howardite Carbonaceous chondrites. I - Characterization and significance of carbonaceous chondrite /CM/ xenoliths in the Jodzie howardite

Nov 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979gecoa..43.1727b&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 43, Nov. 1979, p. 1727-1729, 1731-1742.

Mathematics

Logic

12

Abundance, Carbonaceous Chondrites, Chemical Analysis, Inclusions, Meteoritic Composition, Mineralogy, Rare Gases, Electron Microscopy, Isotopes, Light Elements, Olivine, Pyroxenes, Silicates, Spinel, Sulfides, Tables (Data), Volatility, Meteorites, Carbonaceous Chondrites, Characteristics, Howardites, Grains, Jodzie Meteorite, Xenoliths, Mineralogy, Chemistry, Textures, Isotopes, Inclusions, Comparisons, Classification, Photographs, Pyroxenes, Data, Sulfides, Olivines, Abundance, Matrix, Chondrules, Aggreg

Scientific paper

Mineralogical, chemical, textural, and isotopic studies of the abundant carbonaceous inclusions in the Jodzie howardite which are consistent with carbonaceous chondrite (CM) characteristics are examined. These CM xenoliths show regolith alteration comparable to the Murray and Murchison meteorites but less than Nogoya, flow-oriented development of phyllosilicates and 'poorly characterized phases', and partial oxidation of sulfides. Temperature-programmed pyrolysis mass spectrometry indicates that gas release patterns of volatiles and hydrocarbons, and N, C, and S contents are typical of CM meteorites. The fact that the Ne content is typical for 'solar' values and the isotopic structure of Xe is 'planetary' indicates that these gases were entrapped by different mechanisms, and cosmic ray exposure ages for the xenoliths agree with the reported exposure age for the eucritic host.

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