Systematic variation in rare earth element patterns from a felsic granulite of the Jirisan complex, Yeongnam Massif, Korea

抄録

Rare Earth Elements (REEs) play an important role in interpretation of trace element behavior in geological systems. Changes in the shape of the normalized REE patterns measured from a suite of rocks can record fractionation or differentiation history of the magmatic source. In this paper, we report conjugate chondrite-normalized REE patterns from a felsic granulite in the Jirisan complex of southern Korea. Granulite bodies show systematic variation in REE patterns from north to the south. Rocks in the northern, middle and southern parts of the complex exhibit a range of REE patterns varying from weak, M-type tetrad patterns with a large, negative Eu anomaly to W-type patterns with a slightly positive Eu anomaly. Systematic variation in REE patterns supports a possibility for the interpretation of fractionation from granitic melts related to movement of metamorphic or magmatic fluids.