Archive for November, 2016

Deep water discovered towards Earth’s core

“This water is much deeper than ever found before, at a third of the way to the edge of Earth’s core”

“If it wasn’t down there, we would all be submerged,” says Steve Jacobsen at Northwestern University in Evanston, Illinois. Northwestern geophysicist Steve Jacobsen and his team made the discovery. “This implies a bigger reservoir of water on the planet than previously thought.” Scientists have found deep pockets of magma located about 400 miles beneath North America, a likely signature of the presence of water at these depths. It looks like water from the Earth’s surface can be driven to such great depths by plate tectonics, eventually causing partial melting of the rocks found deep in the mantle.

“Geological processes on the Earth’s surface, such as earthquakes or erupting volcanoes, are an expression of what is going on inside the Earth, out of our sight,” said Jacobsen. “I think we are finally seeing evidence for a whole-Earth water cycle, which may help explain the vast amount of liquid water on the surface of our habitable planet. Scientists have been looking for this missing deep water for decades.”

Read additionally “How we know what lies at Eath’s core” at BBC.