Tag: lower mantle
OIB: what is it?
The term OIB, for Ocean Island Basalt (Where basalt of an oceanic island), refers to basalts having the typical chemical composition of those formed at the level of hot spotsor…
When the waltz of the supercontinents impacts the structure of the deep mantle
How do the tectonic processes governing the Earth’s surface impact the dynamics of the deep mantle? A new study illustrates the importance of subduction zones during major tectonic cycles. You…
The formation of diamonds is linked to the fragmentation of supercontinents
Diamonds are formed in the bowels of the Earth, at very great depth and high temperature. They rise to the surface through volcanic eruptions. They are thus found prisoners of…
The formation of diamonds is linked to the great tectonic cycles
Diamonds are formed in the bowels of the Earth, at very great depth and high temperature. They rise to the surface through volcanic eruptions. They are thus found prisoners of…
The origin of terrestrial components revealed by the composition of the lower mantle
Where do the carbon, nitrogen, and water that made the Earth habitable come from? Even today, this question remains intensely debated. Yet one chemical element in particular could help solve…