A revisit to the Yorii jadeite-quartz rock, the Kanto Mountains, central Japan: Implications for petrogenesis

Based on the available data, a few criteria, including texture, mineral inclusion, Th/U ratio and Ce anomaly of zircon, were proposed to categorize zircons in jadeitite into inherited, incompletely recrystallized and metasomatic ones. The results may be used to infer the formation mechanism of the hosting jadeitite. Some possible ambiguities in applying the proposed criteria were discussed. Following the proposition, it was shown that previous genetic conclusions for some jadeitites from various occurrences around the world would be subjected to question and should be re-examined by careful investigation of mineral inclusions in zircons, similar to this study, in the future.