Mantle Wedge Water Contents Estimated From Ultrasonic Laboratory Measurements of Olivine‐Antigorite Aggregates

While it is known that serpentinized peridotite acts as a water reservoir in the mantle wedge of subduction zone, spatial distribution and quantity stored these reservoirs, well acoustic velocity olivine-antigorite aggregates, are not constrained. Here, we report propagation seismic waves through synthetic olivine–antigorite which used proxies for various lithologies, by varying amount antigorite at pressures up to 8 GPa. Our results indicate strongly dependent on proportion sample somewhat pressure. We empirically explore relationship between degree serpentinization pressure map content wedge. estimations show among subducting slabs around Pacific Ocean 0.5-5.0wt%.