Hosted on MSN6mon
Mysterious Mineral from Earth's Mantle Discovered in South African Diamond
The intense pressure and heat in the upper mantle transform humble carbon deposits into sparkling diamonds; the rocks trap other mantle minerals in their structures and can be pushed to the planet ...
Hosted on MSN5mon
Mantle Rocks From ‘Lost City’ May Give Clues to Origin of Life
But in 2023, a crack formed in the Earth’s crust on the mid-Atlantic Ridge, giving access to the upper mantle ... the composition of the mantle, especially its minerals. Harzburgite — a ...
Phys.org on MSN10d
Water stored in the mantle for millions of years may be linked to continental volcanism
The mantle transition zone (MTZ), which occurs 410–670 kilometers below Earth's surface, may store several oceans' worth of water. This water, which is carried to such depths by subducting tectonic ...
EurekAlert!23d
Advanced seismic imaging deciphers mantle dynamics beneath Tonga subduction zone
(b) Schematic diagram of the upper mantle structure beneath the ... variations in seismic wave speeds caused by aligned mineral fabrics in mantle rocks—to construct a high-resolution 3D velocity ...
Phys.org1y
New proof that Earth's plate tectonics recently underwent a fundamental change
The transition between the upper and lower mantle occurs at about 660 km below Earth's surface. At this depth certain minerals undergo a phase transition. Deng and colleagues believe that this ...