中文摘要：

基于 3-D 地球模型，普通变换点阶段加权的栈(CCP-PWS ) 移植方法习惯于图象在东北中国下面的上面的披风断绝(经度 120 ° 132 °；纬度 38 °有 802 观察接收装置的 40 °) 工作。Teleseismic 记录从属于 CCDSN 和 19 个车站属于 PASSCAL 的 4 个车站被获得。低速度的层在 620 km 的深度被检测了。这低速度的层在学习区域结束的东方升起到 600 km 到潜水艇 ducted 平板。我们认为这低速度的层可能是从西方的和平的潜水艇 ducted 平板的积累的海洋的外壳的材料 delaminated。另外，我们检测被归因于在上面的披风和潜水艇 ducted 平板之间的相互作用的 660 km 断绝的明显的消沉。660 km 断绝的最大的深度接近 700 km，并且 660 km 断绝在学习区域的东北分成多重断绝。

英文摘要：

Based on the 3-D Earth model, the common convert points-phase weighted stacks （CCP-PWS） migration method is used to image the upper mantle discontinuities beneath Northeast China （longitude 120°―132°; latitude 38°―40°） with 802 observed receiver functions. Teleseismic records are obtained from 4 stations belonging to CCDSN and 19 stations belonging to PASSCAL. A low-velocity layer has been detected at the depth of 620 km. This low-velocity layer rises to 600 km in the east of the study region close to the subducted slab. We consider that this low-velocity layer might be the accumulated oceanic crustal material delaminated from the western Pacific subducted slab. Additionally, we detect the obvious depression of 660 km discontinuity which was attributed to the interaction between the upper mantle and subducted slab. The maximum depth of 660 km discontinuity approaches 700 km, and 660 km discontinuity splits into multiple discontinuities in the northeast of the study region.