Ultra-depleted peridotites, which refer to peridotites that have undergone high degrees of partial melting, are an important end-member component of Earth's mantle (e.g., Xu et al., 2021). Due to their refractory physiochemical characteristics, ultra-depleted peridotites have the potential to contribute to continent stabilization (Scott et al., 2019), lithospheric mantle processes during subduction initiation (Parkinson & Pearce, 1998) and craton formation (Pearson et al., 2021). The formation of ultra-depleted peridotites may play an important role in oceanic crust formation during the early stages of the subduction zone development. However, this mechanistic link between subduction initiation has mainly been reconstructed by studies on volcanic rocks, that is,