dehydration

Schematic model showing serpentinite release of isotopically heavy Cu- and S-enriched oxidized fluids into the sub-arc mantle, resulting in fluid-flux melting and arc magmatism. Credit: IOCAS Serpentinite dehydration is essential for water recycling in subduction zones, the released fluids are considered to be a critical component in the oxidation of the sub-arc mantle. However, whether the serpentinite-derived fluids are…

People walk downtown as the temperature reached around 115 degrees in early June in Calexico, California.Photo: Sandy Huffaker (Getty Images)We’re only two weeks into summer, and heatwaves are already scorching the United States. Memphis, Tennessee hit a daily record high temperature of 100 degrees Fahrenheit (38 °C) on June 17. Three days later Houston, Texas hit a daily record of 102 degrees (39 °C). Multiple regions of the country have seen dangerous daytime and nighttime temperatures, while other countries including…

Figure 1: Tectonic map of the Alaska subduction zone.The thick blue solid line outlines the Yakutat terrane. The white circle indicates the epicentre of the low-frequency tectonic tremors, and the light blue dashed line shows the area where the tectonic tremors occurred, which is used in Figures 2 to 4. The area inside the pink dashed box is the model region used in this study, and the pink dashed line down the center of the box divides the model…