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olivine

Close-up of green olivine sand grains
Posted inNews

Can These Rocks Help Rein in Climate Change?

by Tim Hornyak 27 September 202227 September 2022

Spreading olivine on beaches could accelerate ocean uptake of carbon dioxide and potentially limit climate change. The concept and execution still face some scrutiny from scientists.

A wide and flat rock sample with a gray exterior sits on a lighter gray background. Green crystals inside the rock are exposed on the side of the rock facing forward. The crystals are small and uniform in size and light green to dark green in shade.
Posted inNews

Good News: Rocks Crack Under Pressure from Mineral CO2 Storage

by Kimberly M. S. Cartier 3 February 202222 September 2022

When carbon mineralizes in stone, each new fracture exposes more surfaces that can react with and trap CO2, enhancing a rock’s storage capacity.

Image of orange and red smoke rising from behind the black banks of a lava channel at night
Posted inNews

Insights from the Depths of Hawaii’s Kīlauea Volcano

by Kate Wheeling 11 March 202122 September 2022

One of the world’s best monitored and most active volcanos still has secrets to yield, and researchers are turning to vapor bubbles trapped in melt inclusions to find them.

Scanning Electron Microscope images of deformed olivine micropillars
Posted inEditors' Highlights

Olivine Micropillars Reveal Shallow Lithosphere Rheology

by Y. Bernabé 24 July 202022 September 2022

Micrometer scale investigation of the rheological properties of olivine in pressure and temperature conditions corresponding to the shallow lithosphere.

Scientists take spectrometric readings at a rock outcrop in Western Australia
Posted inFeatures

Mars 2020 Team Using Australian Rocks in Search for Life on Mars

by A. J. Brown, C. E. Viviano and T. A. Goudge 2 July 202022 September 2022

Scientists are investigating evidence of ancient terrestrial microbes preserved in Australia as well as mineral maps derived from Mars orbiter data to shed light on how to search for life on Mars.

World map showing location of permanent geomagnetic observatories and their data availability for electromagnetic source characterization.
Posted inEditors' Highlights

Globally Variable Water Content in the Mantle Transition Zone

by S. D. Jacobsen 9 June 202022 September 2022

Using electromagnetic waves originating in the ionosphere and magnetosphere, conductivity profiles reaching the deep upper mantle show surprising variability in water content.

Mantle-derived peridotite xenolith from San Carlos, Arizona, showing green olivine crystals.
Posted inScience Updates

Understanding Electrical Signals from Below Earth’s Surface

by A. Pommier and J. Roberts 19 November 201822 September 2022

A new version of a free Web application (SIGMELTS 2.0) helps Earth scientists interpret electrical anomalies in Earth’s crust and mantle and track the sources of earthquakes and volcanic eruptions.

Harry Green II
Posted inNews

Harry W. Green II (1940–2017)

by P. C. Burnley, W.-P. Chen, L. F. Dobrzhinetskaya, Z.-M. Jin, H. Jung, R. Liebermann, M. Martins-Green, A. Schubnel, Y. Wang and J. Zhang 2 May 201822 September 2022

By keenly probing mantle rheology, interactions of deformations and phase transitions, and microscopic features, he made major contributions to petrology, mineralogy, and earthquake science.

Secondary electron microscope images showing microstructures of stressed grains.
Posted inResearch Spotlights

Probing the Grain-Scale Processes That Drive Plate Tectonics

by Terri Cook 8 December 201722 September 2022

New experimental data suggest that rock composition may play a critical role in forming and perpetuating shear zones.

Features from AGU Journals

RESEARCH SPOTLIGHTS
JGR: Solid Earth
“New Tectonic Plate Model Could Improve Earthquake Risk Assessment”
By Morgan Rehnberg

EDITORS' HIGHLIGHTS
AGU Advances
“Eminently Complex – Climate Science and the 2021 Nobel Prize”
By Ana Barros

EDITORS' VOX
Perspectives of Earth and Space Scientists
“New Directions for Perspectives of Earth and Space Scientists”
By Michael Wysession


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