Abstract:Chromium in pyroxene generally decreases as magmatic fractionation proceeds because of its large octahedral site preference energy. Nevertheless, an increase in Cr with progressive fractionation was found in the early formed proto-and orthopyroxenes from the Bonin Island boninite and augites from the Kasayama olivine andesite. This unusual increase in Cr can be interpreted by the early removal of Cr from magma with Cr-spinel crystallization and the later reaction relations of the crystallized spinels with magm… Show more
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.