SIGNIFICANCE OF IRON-RICH SILICATES IN THE MEZO-MADARAS CHONDRITE.
Environmental research papers,
AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS
Pagination or Media Count:
Several chondrules in the Mezo-Madaras chondrite contain the disequilibrium mineral assemblage ferrous olivine--magnesian pyroxene--merrihueite approximately K or Na2 Fe or Mg5 Si12O30 plus or minus metallic nickel-iron. The ferrous silicates in this assemblage were probably formed by introduction of FeO into an earlier igneous assemblage which consisted or enstatite or clinoenstatite, a magnesian analogue of merrihueite, and silica. Textural and chemical evidence indicate that this alteration of the chondrules took place before they were incorporated in the chondrite. Author
- Geology, Geochemistry and Mineralogy