Tag: earthly mantle
Hot spots that are too cold and a geodynamic model of the Earth’s mantle to be reviewed
A new study questions the deep origin of some hot spots thanks to an analysis of their temperature: they are colder than we thought. You will also be interested [EN…
Recent lava from the Hawaii hotspot is believed to result from intense chemical interactions in the Earth’s mantle
The lavas produced in the volcanoes of certain hot spots have a particularity: they are rich in CO2 and carbonates. The rocks resulting from these magmas are what are called…
Fractional crystallization: what is it?
The magmatic rocks that make up the majority of the Earth’s crust come from the crystallization of liquids magmatic, at the surface or at depth. Surface crystallization leads to the…
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…
What drives plate tectonics?
The outer part of the Earth is divided into different rigid units called lithospheric plates. These plates have the ability to move above the asthenosphere. They can thus fragment, move…