[SIT26-P02] Quantitative evaluation of the geochemical correlation length within the single granitic body, toward the error estimation of geoneutrino flux from the Japanese crust
Keywords:Geoneutrino, Granite, Geochemical modeling
In this study, dense sampling was performed in a single granite body (Inada granite, Kasama City, Ibaraki prefecture) to quantitatively understand the spatial correlation of rock chemical composition. By analyzing the compositional differences between samples at various distances, the spatial correlation length of the compositions was evaluated. Based on the analysis, the "typical composition of a km-scale rock body," which excludes small (cm-m) spatial-scale composition variations, was estimated with an uncertainty. Under this proper correlation modeling, geoneutrino flux estimation errors from the Japan crust would be reduced. We also discuss the magmatic processes that derived the geochemical variations of granite, based on the differences in spatial correlation depending on the elemental species.