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Earth’s interior

Image of a thin section of peridotite, taken under a microscope, with the pinks, greens, purples, and blues of olivine crystals of various sizes mixed with other, less brightly colored minerals
Posted inNews

Million or Billion? Narrowing Down the Age of Mantle Processes in New Guinea

by Alka Tripathy-Lang 16 May 202216 May 2022

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.

An artist’s impression of planet formation: Close to the star, dust particles grow into planetesimals and Earth-like planets. Farther away, gas accretes on planetary cores to create Jupiter-like giants.
Posted inNews

Krypton Isotopes Provide New Clues to Planets’ Pasts

by Carolyn Wilke 4 May 20224 May 2022

To trace how crucial ingredients for life arrived at Earth, scientists track noble gases. Now, improved methods are drawing new clues from krypton, the most cryptic of noble gases.

A red rock tower in front of a backdrop of cloudy sky
Posted inFeatures

Is Earth’s Core Rusting?

by Jiuhua Chen and Shanece S. Esdaille 25 April 202225 April 2022

If subduction carries hydrous minerals deep into Earth’s mantle, they may “rust” the iron outer core, forming vast sinks of oxygen that can later be returned to the atmosphere.

A large hot spring bubbles and steams in the mountains of the Tibetan Plateau.
Posted inNews

Hot Springs Suggest How the Tibetan Plateau Became the Roof of the World

by Saima Sidik 20 April 202221 April 2022

Helium isotopes found in water samples provide a snapshot of what lies beneath the plateau and stimulate debate within the geosciences community.

Cubes of gray-black perovskite in a brown matrix
Posted inNews

How a Newly Discovered Mineral Might Explain Weird Mantle Behavior

by Alka Tripathy-Lang 19 April 202225 April 2022

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.

A magnified view of white minerals embedded in a gray crustal rock
Posted inNews

The Goldilocks Zone May Be Just Right for Migrating Metals

by Kate Wheeling 9 March 20225 May 2022

Researchers identified a gateway that allows metals critical for renewable energy technologies, like copper and gold, to make their way to the surface.

An image of a nodal seismometer
Posted inResearch Spotlights

Potential of Leaking Modes to Reveal Underground Structure

by JoAnna Wendel 7 March 20227 March 2022

Instead of waiting for earthquake waves to tell scientists about the structure of Earth’s interior, scientists can now use ambient noise from humans to “see” underground.

Artist’s rendering of a planet covered in magma
Posted inNews

Layered Zone Beneath Coral Sea Suggests Ancient Magma Ocean

by Alka Tripathy-Lang 4 February 202225 May 2022

Scientists studying South Pacific earthquakes suggest that an ultralow-velocity zone at the core-mantle boundary may be a remnant of a molten early Earth.

Researchers installing the reference station in a glacier forefield at the foot of the Matterhorn
Posted inNews

Mountains Sway to the Seismic Song of Earth

by Richard J. Sima 1 February 202221 March 2022

The Matterhorn in the Swiss Alps is in constant motion, gently swaying back and forth about once every 2 seconds.

Image of the diamond from Botswana containing davemaoite as an inclusion
Posted inNews

Diamond Discovery Unearths Secrets of the Deep

by Clarissa Wright 23 December 202121 March 2022

A diamond inclusion has revealed a new mineral, davemaoite, as well as hints about the workings of our planet’s interior.

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“Nationwide and Regional PM2.5-Related Air Quality Health Benefits from the Removal of Energy-Related Emissions in the United States”
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