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subduction

Two diagrams from the paper
Posted inEditors' Highlights

Fluid Release from Subducted Slabs Without Percolation Flow

by Nikolai Bagdassarov 28 September 202327 September 2023

A new study demonstrates the absorption mechanism of H2O release out of subducting slabs, making the previous hypothesis of dehydration embrittlement unnecessary.

Figure from the paper.
Posted inEditors' Highlights

Low-Frequency Quakes Have Modest Effect on Slow Earthquake Cycle

by Marcos Moreno 5 September 202331 August 2023

Slow slip phenomena on subdaily scales, captured by seismic and GNSS data, show that low-frequency earthquakes are incidental to larger magnitude slow earthquakes, in which aseismic slip dominates.

World map showing topography as well as bathymetry, or the depth of landforms below sea level
Posted inNews

A New, Underground Atlas of Subduction Zones

by J. Besl 28 August 202331 August 2023

Submap merges graphic design with geodynamics, providing a fast, free, and user-friendly resource to map subduction zones.

View overlooking part of Acapulco, Mexico, in the foreground with Acapulco Bay beyond
Posted inResearch Spotlights

Talc May Make Mexico’s Subduction Zone More Slippery

Aaron Sidder, freelance science writer by Aaron Sidder 23 August 202323 August 2023

Production of the weak, water-bearing mineral at the interface between the Cocos and North American Plates could contribute to the occurrence of poorly understood episodic tremor and slow slip.

Three-dimensional wireframe representation of Earth with a red spotted sphere in the center. The continents are shown in turquoise, and yellow lines radiate from a point on the bottom left continent.
Posted inNews

Mounds of Ancient Ocean Floor May Be Hiding Deep in Earth

Tim Hornyak, Science Writer by Tim Hornyak 13 June 20234 August 2023

A mysterious seismic feature at the bottom of Earth’s mantle is more widespread than previously thought.

Diagram from the paper.
Posted inEditors' Highlights

Are Low-Frequency Earthquakes Just Slow Slip?

by Marcos Moreno 5 June 202331 May 2023

Tests of seismic attenuation show fluid saturation and high pressure near a seismic source reduce high-frequency content, challenging the idea of slow slip as the cause of low-frequency earthquakes.

Researchers deploying an ARGO float.
Posted inEditors' Highlights

Bio-Argo Floats Reveal Phytoplankton Increase at Ocean Fronts

by Takeyoshi Nagai 20 March 202320 March 2023

Bio-Argo floats and satellite altimeter data reveal that upwelling caused by confluent flow on the warm side of ocean fronts increases phytoplankton carbon and chlorophyll.

Photo of the Apennine Mountains in Italy.
Posted inEditors' Highlights

Topography Along the Apennines Reflects Subduction Dynamics

by Duna Roda-Boluda 15 March 202313 March 2023

Topography and exhumation vary strongly along the Apennines, reflecting the geometry of the Moho and different geodynamic mechanisms.

Posted inEditors' Highlights

The Crust Travels to the Earth’s Core and Back in Record Time

by Vincent Salters 16 December 20228 February 2023

Subduction of continental crust around the Gondwana supercontinent may explain the mantle Dupal anomaly of the southern hemisphere.

diagram of a subduction zone
Posted inEditors' Highlights

Tracing Oxidizing Slab Fluids in Cold Volcanic Arcs

by Susanne Straub 28 October 202215 November 2022

Elevated copper isotope ratios in arc magmas from fluid-rich cold subduction zones support the role of oxidizing fluids from the subducted lithospheric serpentinite in the oxidization of arc magmas.

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