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Scientists find ancient 250-million-year-old seafloor from the time of dinosaurs hidden in Earth’s mantle
In the process, they discovered a thickened section of the mantle transition zone, located about 410 to 660 kilometers below the Earth’s surface. This zone separates the upper and lower mantles ...
Seismic anisotropy in the deep mantle could partly be derived from the deformation of hydrous phase D
To investigate this, a team of researchers in Japan performed well-controlled deformation experiments on phase D aggregates ...
Deepest Earthquake Was Not A Seismic Record After All
A record-breaking deep earthquake registered in May 2015 offshore of Japan likely was not a tectonic event but triggered by a ...
University of Bristol2y
The fate of carbonate in oceanic crust subducted into earth's lower mantle
The melting curves of carbonated basalt at upper mantle and transition zone pressures are from (Kiseeva et al., 2013) (green curve) and (Andrew R Thomson et al., 2016; A.R. Thomson et al., ...
Claims for the world’s deepest earthquake challenged by new analysis
The magnitude 7.9 Bonin Islands earthquake sequence, which ruptured deep within the earth near the base of the upper mantle, did not include an aftershock that extended to record depths into the lower ...