C. Perinelli, P. Armienti and L. Dallai, “Thermal Evolu- tion of the Lithosphere in a Rift Environment as Inferred from the Geochemistry of Mantle Cumulates. Northern Victoria Land, Antarctica,” Journal of Petrology, Vol. 52, No. 4, 2011, pp. 665-690. doi:10.1093/petrology/egq099

has been cited by the following article:

• TITLE: Three-Dimensional Representation of Geochemical Data from a Multidimensional Compositional Space

  AUTHORS: Pietro Armienti, Placido Longo

  KEYWORDS: Principal Component Analysis, Phase Diagrams, Rendering, Geochemistry

  JOURNAL NAME: International Journal of Geosciences, Vol.2 No.3, August 19, 2011

  ABSTRACT: Systems described by a wide set of variables, like rock compositions, may be often modeled by a reduced set of components, like minerals, that can be represented in diagrams in two or three dimensions. This paper deals with an original algorithm that allows the representation of compositional data in tetrahedral diagrams, provided that they can be recast on the basis of four end members. The algorithm is based on the orthogonal projection of a given point belonging to Rn to the 3D-space through four Rn points representing the compositions of suitable end members. The algorithm is applied to the assessment of mass balance problems (in weight% or molar basis) as well as to the identification of the geochemical imprint revealed by isotope ratios in igneous rock suites. The fields of possible applications are by far wider, encompassing all problems of comprehensive data representation from a multidimensional space to a bi-dimensional plot.