Figure 4
From: Synthesis of heavy hydrocarbons at the core-mantle boundary
Formation of unsaturated hydrocarbons marked as C-C and C-H bonds at the core-mantle boundary via reaction of C-O-H-bearing fluid/melt from subducting slab with Fe from the core.
An alternative source for C and H would be the metallic core itself. Green slices represent former oceanic crust. Pv – perovskite, PPv – post-perovskite-bearing layers in colder zones of the CMB.
