Scientists already knew that most of the gold on the planet — more than 99.95%, lies hidden in the molten core, along with other heavy elements such as platinum.
As meteorites bombarded one another in Earth’s early history, a reservoir of these precious metals developed when the core formed about 4.5 billion years ago.
But this study suggests that at least a tiny amount of that gold has escaped to the surface, raising the fascinating prospect that, if the leaking continues, more and more of this precious metal could travel from the center of Earth to the crust in the future.
“Our findings not only show that the Earth’s core is not as isolated as previously assumed.
We can now also prove that huge volumes of super-heated mantle material — several hundreds of quadrillion metric tonnes of rock — originate at the core-mantle boundary and rise to the Earth’s surface to form ocean islands like Hawaii.” (CNN)
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