Iron Oxide (U–Th)/He Thermochronology: New Perspectives on Faults, Fluids, and Heat

Fault zones record the dynamic motion of Earth’s crust and are sites of heat exchange, fluid–rock interaction, and mineralization. Episodic or long-lived fluid flow, frictional heating, and/or deformation can induce open-system chemical behavior and make dating fault zone processes challenging. Iron oxides are common in a variety of geologic settings, including faults and fractures, and can grow at surface- to magmatic temperatures. Recently, iron oxide (U–Th)/He thermochronology, coupled with microtextural and trace element analyses, has enabled new avenues of research into the timing and nature of fluid–rock interactions and deformation. These constraints are important for understanding fault zone evolution in space and time.

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Black Lives Matter: Promoting Diversity, Equity, and Inclusion in Geochemistry

On 12 June 2020, the GS–EAG ran a town hall meeting called “Black Lives Matter – Promoting Diversity, Equity, and Inclusion in Geochemistry.” During the event, over 500 participants heard from community members on how to fight racism, increase diversity and equity in our discipline, and to make the GS, the EAG, and the Goldschmidt meeting safe and inclusive for all. We will follow this theme over the next few issues, beginning with the following opening statements from the four early career researchers on the town hall panel.

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