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garnets

Diagram from the study
Posted inEditors' Highlights

Piecing Together the Roots of the Ancient Australian Continent

by Paul Asimow 25 October 202326 October 2023

Mineral compositions from numerous volcanic rocks that sample the mantle keel beneath Western Australia’s Kimberley Craton reveal the temperature and mineralogy that explain its long-lived stability.

Map and graphs from the paper.
Posted inEditors' Highlights

Machine Learning Helps Constrain the Thickness of Ancient Crust

by Emily Chin 1 June 202331 May 2023

A machine learning model trained using data on the chemical composition of magmatic rocks yields comparable, if not better, results to previously developed geochemical proxies.

Close-up of an outcrop of an eclogite from the Monviso area of Italy showing a vug, or hole, containing red garnet crystals and green pyroxene crystals.
Posted inNews

Holey Eclogite!

by Alka Tripathy-Lang 1 July 202215 November 2022

Scientists have found holes filled with minerals that indicate fluid-filled pores exist many tens of kilometers below Earth’s surface. But no, The Core fans, you still can’t get amethyst-laden geodes in the mantle.

Ethan Baxter examining garnet samples on an island cliff in Sifnos, Greece
Posted inNews

Using Garnets to Explore Arc Magma Oxidation

Rachel Crowell, Science Writer by Rachel Crowell 26 November 20195 October 2022

Samples collected from Greece help researchers piece together a scientific puzzle.

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 20189 March 2023

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.

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