Joint compositional calibration: a geochronological example


Joint compositional calibration: a geochronological example

Tolosana-Delgado, R.; van den Boogaart, K. G.; Fiserova, E.; Hron, K.; Dunkl, I.

This contribution explores several issues arising in the measurement of a (geo)chemical composition, specially in the case that the quantities of interest are linear functions of (log)-ratios. This is the case of multi-isotopic geochronological analyses, where an age of a geological material is inferred as a function of several logratios in the isotopic system (Hg202, Pb204, Pb206, Pb207, Pb208, Th232, U235, U238), by using several ratios (e.g., Pb208/Pb206, Pb206/Pb204, Hg202/Pb204, U238/U235), quantities that are scaling invariant and subcompositionally coherent, but which in general cannot be estimated without taking into account additive noise effects incompatible with a purely compositional approach. The proposed ways to a solution heavily build upon the multi- Poisson distribution, higlighting the counting nature of the readings delivered by these measuring machines.

  • Open Access Logo Contribution to proceedings
    6th International Workshop on Compositional Data Analysis, 01.-05.06.2015, L'Escala, Girona, Espana
    Proceedings of the 6th International Workshop on Compositional Data Analysis, 978-84-8458-451-3, 241-257

Permalink: https://www.hzdr.de/publications/Publ-22613
Publ.-Id: 22613