Scientists have more accurately constrained the composition of the Earth’s core by performing sound-velocity measurements at double the pressure of previous ones. Building on a program started 15 years ago by Alfred Q. R. Baron in the RIKEN Materials Dynamics Laboratory, researchers have finally
Researchers at RIKEN have measured the sound velocity of pure iron at extreme pressures, shedding light on Earth’s core composition and enabling improved measurements for other materials.
Building on a program started 15 years ago by Alfred Q. R. Baron in the RIKEN Materials Dynamics Laboratory, researchers have finally been able to measure the sound velocity of pure iron at static pressures corresponding to those of the Earth’s inner core.
The work is interesting because it allows constraints to be placed on the composition of the Earth’s core. “We actually have amazingly little information about the center of the planet we live on,” says Baron.
France Dernières Nouvelles, France Actualités
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