Metamorphic basement of the jiangnan Proterozoic Paleo - island arc mainly consists of low - grade metamorphic volcanic sedimentary rocks.

江南元古宙古岛弧的基底变质岩主要由浅变质的岛弧火山—沉积岩系组成.

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Elsewhere, two plates may shift toward each other and converge along a trench and island arc.

在别的地方, 两块板块又可能相向移动而沿着深海沟和岛弧逐渐聚合.

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Acid intrusions of Late Caledonian or Early Variscian Epoch result from island arc magmatism.

加里东晚期或华力西早期侵位的酸性侵入岩为岛弧环境产物.

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Pengxian deposit and the Masongling Formationformation are products of island arc volcanism in convergent plate boundary.

证据表明,马松岭组及其所赋存的铜矿床均为会聚性板块边界古火山岛弧的产物.

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