Mingling dike of the Ryoke metamorphic belt
Mingling dikes of mafic and felsic magmas are seen in the Ryoke metamorphic zone of central Honshu. They occur mostly in metamorphic rocks of the sillimanite zone, and the latest one is seen as diabasic dike in granitic rocks. Thus, these dikes were active in a long period of the Cretaceous time and brought up heat from the upper mantle. The photograph taken at southwest of Taguchi, Aichi Prefecture.
(Shunso Ishihara)
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