A big mantle wedge (BMW) is an important deep Earth structure that has implications for our understanding of geodynamic processes. The eastern and northeastern Asian BMWs have been extensively studied in the past two decades. This paper reviews evidence for the age, formation, spatial extent, and geodynamic effects of BMWs, with the aim of distinguishing between two BMWs. The eastern Asian BMW initially formed in the late Early Cretaceous and was active from 110 to 55 Ma due to rollback of the subducted Paleo-Pacific Plate and eastward-directed deep mantle flow. This BMW affected the entire eastern Asian continental margin and controlled the late Mesozoic–early Paleogene tectonic evolution of the margin, including destruction of the North China Craton and reworking of continental crust in South China. The northeastern Asian BMW has been active from 20 Ma to the present-day due to rollback of the subducted Pacific Plate and eastward mantle flow. It has mainly affected northeast Asia and resulted in different types of Cenozoic intraplate volcanism and occurrence of earthquakes with deep epicenters.

大地幔楔 (BMW) 是一种重要的地球深部结构，对我们理解地球动力学过程具有重要意义。在过去的二十年里，人们对东亚和东北亚的 BMW 进行了广泛的研究。本文回顾了 BMW 的年龄、形成、空间范围和地球动力学效应的证据，目的是区分两个 BMW。东亚 BMW 最初形成于早白垩世晚期，由于俯冲的古太平洋板块回滚和向东的深部地幔流动，活跃于 110 至 55 Ma。这个BMW影响了整个东亚大陆边缘，控制了晚中生代—古近纪早期的边缘构造演化，包括华北克拉通的破坏和华南大陆地壳的改造。由于俯冲太平洋板块回滚和东向地幔流，东北亚 BMW 从 20 Ma 到现在一直很活跃。它主要影响东北亚地区，导致不同类型的新生代板内火山活动和深震地震的发生。