“…Fragments of the previous subducting plate are naturally preserved during polarity reversal, which witnesses the whole process of subduction termination and (re)initiation and provides a favorable condition for revealing the dynamics of induced SI. Previous studies have shown that mantle avalanche (Pysklywec et al, 2003), arc-continent collision (Baes et al, 2011b;Chemenda et al, 2001;Clift et al, 2003;Johnson & Jaques, 1980;Konstantinovskaia, 2001;Ustaszewski et al, 2012;Zhang & Leng, 2021), and postsubduction accretion (Faccenda et al, 2008;Liu et al, 2021;Nair & Chacko, 2008;Simakin, 2014;Tao et al, 2020;Vogt & Gerya, 2014) can all induce subduction polarity reversal. Oceanic plateaus are widely distributed in the oceans (Figure S1).…”