Global seismic imaging and deep source seismic data have revealed that some formerly subducted fragments (slabs ) seem to have continuously or intermittently sunk to the CMB and returned into the mantle plumes originated from the boundary.

• 全球地震成象和深源地震资料表明，某些破碎的早期俯冲板片可能连续或间断性地下沉到核-幔边界处，井返回到起源于该边界层的地幔羽中。