Abyssal peridotites show through their isotopic composition a complex history. From differences we can infer the existence of ultra depleted mantle and an uneven contribution to ridge magmatism.
Earth’s interior
Posted inEditors' Highlights
4D Viscosity Constraints from Greenland
The mantle’s resistance to flow appears different for glacial and plate tectonic timescales but this behavior can be reconciled with new thermo-mechanical models of the asthenosphere.
Posted inNews
Crystals Track Magma Movement Beneath Iceland
Crystals from Fagradalsfjall’s eruption mark how mantle magma might have been moving years before geophysical indicators alerted scientists to unrest.
Posted inResearch Spotlights
Small-Scale Convection Shuffles the Oceanic Lithosphere
Seafloor spreading organized lithospheric minerals into a lattice, but small-scale convection jumbled up the innermost layer.
Posted inEditors' Highlights
The Crust Travels to the Earth’s Core and Back in Record Time
Subduction of continental crust around the Gondwana supercontinent may explain the mantle Dupal anomaly of the southern hemisphere.
Posted inEditors' Highlights
Can Anelastic Attenuation of Oceanic Mantle be Reliably Measured?
A new study demonstrates that robust anelastic attenuation measurements can be made across ocean bottom seismic arrays at different locations using surface wave array analysis.
Posted inNews
Billion-Year Rewind Tracks Supercontinents and Mantle Structures
Scientists have traced past pathways of tectonic plates back a billion years using computer models, with intriguing results. Incorporating geologic data as a check on model output, however, has proven tricky.
Posted inAGU News
Making Waves
Sources of tsunamis are undersea, underground, and under the microscope in our October issue.
Posted inEditors' Vox
Global Seismic Networks: Recording the Heartbeat of the Earth
Global broadband seismographic networks have provided the science community with 30 years of data which is being used to understand the Earth.