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火山弧

出自维基百科,自由个百科全书

火山弧为链状个火山群,形成拉隐没板块之上。成群个火山拉海上形成火山弧。通常,较重个板块隐没到另一个板块之下时喷出岩浆形成搭隐没带平行个火山群岛或山脉。隐没个板块饱含水、挥发物,因此能降低地幔个熔点。

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