文摘
Review of petrologically plausible explanations for cratonic mantle discontinuities Melt at cratonic LAB depth (≥ 200 km) due to anomalous sublithospheric X-T, retarded drainage and/or resupply Conflicting seismic-petrologic LAB signatures due to thermochemical-mechanical erosion MLDs result mostly from past deposition of metasomes at mechanical boundary layers. Omnipresent metasomes documented by alkaline melts, underestimated due to non-representative sampling