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Geochemistry, Geophysics, Geosystems

Loading an instrument for clumped-isotope analysis
Posted inResearch Spotlights

Carbonate Standards Ensure Better Paleothermometers

by Jack Lee 1 June 20219 November 2021

A community effort finds that carbonate standards eliminate the interlaboratory differences plaguing carbonate clumped-isotope thermometry studies.

Rectangular to hexagonally shaped orange, blue, and white crystals on a black background. Crystals have concentric growth zones of varying colors.
Posted inNews

A New Tool May Make Geological Microscopy Data More Accessible

by Richard J. Sima 27 May 20214 January 2023

PiAutoStage can automatically digitize and send microscope samples to students and researchers on the cheap and from a distance.

Two plots comparing seasonal variability in mussel stable isotope values from the periostracum with measured suspended particulate organic matter, used to reconstruct the isotopic composition of suspended particulate organic matter.
Posted inEditors' Highlights

Tracking Excess Nitrogen with Freshwater Mussels

by B. Williams 30 April 202122 December 2021

Mussel shell periostracum and carbonate bound organic matter document seasonal variability in the isotopic composition of riverine suspended particulate organic matter.

The new heat-flow map of Antarctica.
Posted inEditors' Highlights

Taking the Temperature of Antarctica’s Crust

by Sergei Lebedev 15 March 202110 March 2022

How do you measure the geothermal heat flux in a continent covered by an ice-sheet? A new study uses correlations of diverse global observables and produces a heat flow map of the entire Antarctica.

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.

Researchers conduct magnetic measurements of a meteorite at the Smithsonian Museum Support Center.
Posted inNews

Measuring Massive Magnetic Meteorites

by Andrew J. Wight 4 November 202015 November 2022

A new tool to measure the magnetic signatures of big meteorites could not only aid NASA’s mission to Psyche; it could also help solve mysteries about how magnetic fields formed in our early solar system.

The Alaknanda River, seen from stream level, flows among mountains in northern India.
Posted inResearch Spotlights

Tracking Trace Elements in the Ganga River

by David Shultz 16 October 202016 February 2022

Levels of dissolved trace and heavy metals, which can be toxic, are highly variable across the river basin, concentrating in urban areas with high pollution but diluted by inflow from tributaries.

Deformed buildings, beached boats, and debris litter a coastline in Japan.
Posted inNews

What Controls Giant Subduction Earthquakes?

by P. Waldron 15 October 202016 March 2022

Subduction zones with a low dipping angle and thick sediments can produce giant earthquakes; this finding lets researchers estimate worst-case scenarios for coastlines around the world.

Schematic cross section across the Cordillera Blanca massif and conceptual model for structural controls on fluid circulation
Posted inEditors' Highlights

Structural Style Controls Crustal Fluid Circulation in Andes

by W. Behr 26 August 202028 January 2022

Variations in hot spring geochemistry from adjacent mountain ranges with different styles of faulting highlight the influence of crustal-scale structures on circulating fluids in the Peruvian Andes.

Interpretations of seismic reflection transects across a section of the Australia-Antarctic rift margin
Posted inEditors' Highlights

New Data from Earth’s Largest Non-Volcanic Rift Margin

by W. Behr 24 August 202027 January 2023

Seismic reflection images combined with petrological data provide new constraints on the nature of the basement in the enigmatic Australia-Antarctic oceanic-continent transition zone.

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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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