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Petrology and geochemistry of Miocene igneous rocks on Rebun Island, northern Hokkaido, Japan
Journal of Mineralogical and Petrological Sciences
Stages I and II produced small intrusions of dolerite and dacite, respectively. During Stage III, basalt to andesite lavas erupted, while the magmatism of Stage IV formed large intrusions of dolerite, porphyrite, and andesite with dacitic veins. The large variations of major and trace element compositions of Stage III and IV rocks can be explained by considering the fractional crystallization of a basaltic melt; however, the proportion of phases fractionating is different for the two stages.doi:10.2465/jmps.070421 fatcat:jwh2i3aijrdnpgpnraqtih43yu