The role of plume-ridge decoupling on rapid plate motion

Ben Mather , Maria Seton, Simon Williams, Jo Whittaker, Rebecca Carey, Maëlis Arnould, Nicolas Coltice, Bob Duncan Iceland Ridge Plate motion driven by: Slab pull at subduction zones Plume push at mid-ocean ridges (MORs) Geometry and location of MORs are independent of lower mantle dynamics. But this fails to recognize the attraction between plumes and MORs. Zhang et al, 2018, Geosci . Frontiers LIPs repeatedly form at locations where plumes and ridges intersect. Ridge segments coupled to plumes migrate far less than adjacen t ridge segments. Whittaker et al. 2016, Nat Geo Slowly spreading MORs may jump towards mantle plumes Mittlestaedt et al. 2011, JGR May result in deviations in hotspot tracks predicted from plate motion Hawaiian-Emperor Chain Sun et al 2021, Science Bulletin

Jun 27, 2023 9:00 AM — 10:00 AM