Mantle rocks in Papua New Guinea contain curious geochemical signatures that scientists have traditionally interpreted as evidence of billions-year-old melting. New evidence suggests otherwise.
Earth's mantle
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How a Newly Discovered Mineral Might Explain Weird Mantle Behavior
Scientists not only synthesized davemaoite but deformed it at lower mantle conditions. They found its strength and viscosity to be substantially lower than those of other minerals that make up the lower mantle.
Posted inEditors' Highlights
Transient Mantle Flow Triggers Morphotectonic Activity in Asia
Changes in mantle dynamics following the Australian collision in southeast Asia triggered fast and intense morphotectonic activity at the surface.
Posted inResearch Spotlights
Recovering Mantle Memories from River Profiles
Researchers use a closed-loop modeling strategy to validate regional uplift patterns recorded in river profiles across the African continent.
Posted inEditors' Vox
Processes in Earth’s Mantle and Surface Connections
A new AGU book presents a multidisciplinary perspective on the dynamic processes occurring in Earth’s mantle.
Posted inEditors' Highlights
A Novel Thermobarometer to Infer Mantle Melting Conditions
The algorithm RevPET automatically reverses the complex multi-phase fractional crystallization path of oceanic basalts and offers new perspectives for advancing mantle thermobarometry.
Posted inResearch Spotlights
First Report of Seismicity That Initiated in the Lower Mantle
A 4D back-projection method revealed that aftershocks of the 2015 earthquake beneath the Ogasawara (Bonin) Islands occurred as deep as about 750 kilometers.
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Lava from Bali Volcanoes Offers Window into Earth’s Mantle
Lava from the Agung and Batur volcanoes provides a near-pristine picture of Earth’s mantle and raises questions about all volcanoes along the Indonesian Sunda Arc and beyond.
Posted inEditors' Highlights
Watering Down the Mantle
The cooling of planet Earth over time increased the water carrying capacity of the mantle and could have shrunk the oceans.
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Geologists to Shed Light on the Mantle with 3D Model
The model, which will incorporate 227 million surface wave measurements, could help with everything from earthquake characterization to neutrino geosciences.