Chemical and mineral composition of Fe and Mn deposits and basaltic rocks in the Tokoro Belt, Japan.

Chemical and mineral compositons of Fe and Mn deposits and basaltic rocks in the Tokoro Belt, Japan. The Tokoro Belt is the Jurassic to Cretaceous accretionary complex. Fe and Mn deposits were formed due to hydrothermal activity at mid-ocean ridge in the Callovian or earlier and oceanic island in the middle Barremian to the early Aptian, respectively. Basaltic rocks are classied into MORB and OIB.