Processes and subdivisions in diogenites, a multivariate statistical analysis

Details Processes and subdivisions in diogenites, a multivariate statistical analysis Processes and subdivisions in diogenites, a multivariate statistical analysis

Mar 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984metic..19...15h&link_type=abstract

Meteoritics (ISSN 0026-1114), vol. 19, March 31, 1984, p. 15-23.

Other

8

Achondrites, Meteoritic Composition, Multivariate Statistical Analysis, Petrology, Pyroxenes, Chemical Fractionation, Cluster Analysis, Factor Analysis, Igneous Rocks, Iron Meteorites, Meteorites, Diogenites, Statistical Analysis, Classification, Analyses, Orthopyroxene, Garland, Peckelsheim, Comparisons, Composition, Fractionation, Mixing, Techniques, Procedure

Scientific paper

Multivariate statistical techniques used on diogenite orthopyroxene analyses show the relationships that occur within diogenites and the two orthopyroxenite components (class I and II) in the polymict diogenite Garland. Cluster analysis shows that only Peckelsheim is similar to Garland class I (Fe-rich) and the other diogenites resemble Garland class II. The unique diogenite Y 75032 may be related to type I by fractionation. Factor analysis confirms the subdivision and shows that Fe does not correlate with the weakly incompatible elements across the entire pyroxene composition range, indicating that igneous fractionation is not the process controlling total diogenite composition variation. The occurrence of two groups of diogenites is interpreted as the result of sampling or mixing of two main sequences of orthopyroxene cumulates with slightly different compositions.

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