Variety of subduction and accretion processes in cretaceous to recent plate boundaries around Southwest and central Japan

摘要: Abstract The Shimanto and Miura-Boso terranes in southwest central Japan are analyzed for the understanding of variation subduction-accretion process convergent plate boundaries. is a Cretaceous to Recent Honshu accretionary prism 200 km width arc side made up melange, flysch olistostrome units. These repeated by many thrust faults local broad tight folds make Schuppen structures. Shallow marine olistostromal bodies overlie part structures unconformably or included within Normal subduction tectonics prevail formation but effects probable transform during late Oligocene early Miocene, considerable. region terrane newly accreted from Izu arc. This Miocene younger volcaniclastic sedimentary rocks, dismembered ophiolitic materials some rocks Supergroup. characterized transpressional associated with eduction sedimentation on highly oblique zone between Eurasia (later North America) Philippine Sea plates. Several cases emplacement basaltic other oceanic landward discussed account basic problem tectonics.