海沟岛弧

论海沟岛弧弧后盆地复合体系的形成机制

On the formation mechanism of trench arc back arc basic system

内蒙古温都尔庙白乃庙地区是早古生代中亚蒙古海洋板块与华北陆台之间的海沟岛弧体系。

The wenduermiao Bailaimiao region in Inner Mongolia formed the trench island is a system between the central Asian Mongolia oceanic plate of Early palaeozoic and the North China continental platform .

M面剧变（斜坡）带拗陷区（系）隆起带（区）配置的深部构造格架表现为挤压拉张式的地壳结构体制，并与西太平洋大陆边缘海沟岛弧弧后盆地体系相适应。

The deep structural configuration of steeply sloped Moho zone Mantle depression zone ( system ) mantle uplift zone ( region ) implies a crustal structural regime of compression extension type , which is in accord with the trench arc backarc basin system of the west Pacific continental margins .

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。

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

耦合弱的特点与俯冲板块年龄小、抗挠强度弱、俯冲角度大、海沟后撤、岛弧裂离和弧后拉张等特点是一致的。

The weak couplings are in agreement with such tectonic features as young subduction slab , weak flexure strength , large subduction angle , trench retreating , arc rifting and backarc extension .