Islandarcs form along an active boundary between two tectonic plates, with one being driven beneath the other (subduction).
岛弧形成于两个板块之间的活跃边界上，其中一块会被推挤到另一块的下方(称之为“消亡”)。
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The Japanese archipelago is located on the so-called Pacific Rim of Fire, a large active volcanic and tectonic zone ringing North and South America, Asia and islandarcs in Southeast Asia.
Fluid released during the high pressure and ultrahigh pressure metamorphism plays an important role in the evolution of subducted slab and may connect directly with igneous activity in islandarcs.