Agpaicity revisited: pattern recognition in the chemistry of nepheline syenite rocks

Details Agpaicity revisited: pattern recognition in the chemistry of nepheline syenite rocks Agpaicity revisited: pattern recognition in the chemistry of nepheline syenite rocks

Nov 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975gecoa..39.1499d&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 39, Issue 11, pp.1499-1504

Mathematics

Logic

Scientific paper

An attempt is made to describe global variations in the geochemistry of major and minor elements within a population of nepheline syenite samples defined by mineralogical criteria. Using correspondence analysis, a new pattern recognition procedure, it is possible to define a few trends of common behaviour which reflect most of the initial dispersion. As Al and Na participate in the scattering along the two main trends, agpaicity is recorded by them. However, the traditional form of the coefficient which measures it is proved to be unsatisfactory as variations of K are not significant.

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