中文摘要：

蛇绿岩就位机制可以划分出4种：1）碰撞仰冲型：被动大陆边缘或岛弧与洋壳碰撞时，俯冲到一定深度的硅铝质物质在浮力作用下折返，并上驮相对完整的大洋岩石圈残片到达地表：2）增生底垫型：洋底、海沟沉积物及海底较高地形的上层物质从俯冲板块上刮削下来，持续底垫到上覆板块之下，使大洋岩石圈残片逐渐被动抬高；3）俯冲剥离型：断裂发育相对密集的洋中脊和转换断层等大洋岩石圈薄弱带，在滑脱断层的作用下大洋岩石圈上部层位的物质被剥离，在俯冲作用的驱动下被抬升；4）角流型：从俯冲板块上刮削下来的大洋岩石圈残片被带入狭窄型或宽阔型增生楔，以管道流的方式进入深部并遭受高压变质作用，由低密度物质裹挟带出并就位至增生楔浅部。变质底板可以限定蛇绿岩就位的开始时限，后就位沉积物可以确定蛇绿岩就位的结束时间。

英文摘要：

Based on different processes and characters,four mechanisms of ophiolite emplacement are mainly discussed： Collision-obduction type （obduction of forearc oceanic lithosphere onto a passive continental margin or arc during the attempted subduction of the passive margin or arc） ; Accretion-underplating type （ continued growth of the underlying accretionary complex by underplating gradually uplifts the overlying oceanic lithosphere） ; Subduction-flake type （ the upper part of the oceanic lithosphere be flaked from the mid-ocean spreading centers or transform faults, the lowest strength areas of the oceanic plate, and then be uplifted during the subduction） ; Corner flow type（dismembered oceanic lithosphere fragments are carried in the narrow/wide accretionary prism through a channel flow, after subjected the high-pressure metamorphism,they finally be carried out by the lower density materials）. The age of the metamorphic soles can constrain the beginning of ophiolite emplacement and, the formation of the post-emplacement sediments record the minimum age of emplacement of the ophiolite over the continent or arc.