近年来,一种新的海底扩张模式引起了广大科学家的重视.它与一般的岩浆型洋中脊扩张不同,属于一种非岩浆或贫岩浆的海底扩张方式,扩张作用主要通过拆离断层的滑移来实现.拆离断层使下盘的深部洋壳或上地幔岩石出露到海底,形成了大洋核杂岩,通常表面呈现龟背似的波瓦状穹隆,或称巨型窗棱构造.从拆离断层、大洋核杂岩等基本概念入手,综述这种新型海底扩张模式的特征,总结归纳大洋核杂岩的分布状况及识别手段,探讨其地质意义以及对海底热液活动、成矿的积极影响. In recent years, a new mode of seafloor expansion has aroused the attention of scientists.It is different from the general magmatic mid-oceanic ridge expansion and belongs to a non-magmatic or lean magmatic seabed expansion mode mainly through detachment of faults Slippage.The detachment of the fault exposes the deep oceanic crust or upper mantle rock of the footwall to the seafloor to form oceanic core complexes, usually with turtle-like wave-like domes or giant window-edge structures. Starting with the basic concepts of detachment faults and oceanic core complexes, the characteristics of this new type of seafloor expansion are summarized, and the distribution and identification of oceanic core complexes are summarized. The positive impact.