Silicon isotope compositions of metaperidotites from the Franciscan Complex of California- implications for Si isotope fractionation during subduction dehydration

K isotopic fractionation in K-feldspar: Effects of mineral chemistry

“…Previous studies have demonstrated significant K isotopic fractionation during magmatic differentiation, primarily associated with the fractionation of K-rich minerals (Ding et al, 2023;Huang et al, 2023;Su et al, 2023;Wang et al, 2022). The potential impact of inter-mineral K isotopic fractionation on shaping K isotopic behavior is noteworthy.…”

“…Whereas available K isotopic data have been mainly derived from whole rock analyses, it is imperative to emphasize that K-rich minerals within rocks control the overall K isotopic variations, a facet that has yet to receive adequate attention. Notably, studies of igneous rocks have indicated that the fractional crystallization of K-rich phases such as mica and K-feldspar holds the potential for playing a pivotal role in driving K isotopic variation (Ding et al, 2023;Su et al, 2023). The isotopic data sourced from these K-rich minerals have the capacity to enrich our comprehension of geological processes when merged with other geochemical and petrological tools.…”