What tectonic plate is located west of a trench which reaches a maximum-known depth of 10994 m?
Mariana Trench The Mariana Trench or Marianas Trench is the deepest part of the world's oceans. It is located in the western Pacific Ocean, an average of 200 km to the east of the Mariana Islands, in the Western Pacific East of Philippines. It is a crescent-shaped scar in the Earth's crust, and measures about 2550 km long and 69 km wide on average. It reaches a maximum-known depth of 10994 m (± 40 m ) at a small slot-shaped valley in its floor known as the Challenger Deep, at its southern end, although some unrepeated measurements place the deepest portion at 11034 m . If Mount Everest were dropped into the trench at this point, its peak would still be over 1.6 km underwater. In 2009, Marianas Trench was established as a United States National Monument.
Large low-shear-velocity provinces Large low-shear-velocity provinces, LLSVPs, also called superplumes, are characteristic structures of parts of the lowermost mantle (the region surrounding the outer core) of the Earth. These provinces are characterized by slow shear wave velocities and were discovered by seismic tomography of the deep Earth. There are two main provinces: the African LLSVP and the Pacific LLSVP. Both extend laterally for thousands of kilometers and possibly up to 1000 km vertically from the core-mantle boundary. The Pacific LLSVP has specific dimensions of 3000 km across and 300 m higher than the surrounding ocean-floor, and is situated over four hotspots that suggest multiple mantle plumes underneath. These zones represent around 3% of the volume of the Earth. Other names for LLSVPs include "superwells", "thermo-chemical piles", or "hidden reservoirs". Some of these names, however, are more interpretive of their geodynamical or geochemical effects, while many questions remain about their nature.