Subducting volcaniclastic-rich upper crust supplies fluids for shallow megathrust and slow slip

AC Gase, NL Bangs, DM Saffer, S Han, PK Miller… - Science …, 2023 - science.org
Recurring slow slip along near-trench megathrust faults occurs at many subduction zones,
but for unknown reasons, this process is not universal. Fluid overpressures are implicated in …

Subduction earthquake cycles controlled by episodic fluid pressure cycling

L Dal Zilio, T Gerya - Lithos, 2022 - Elsevier
In subduction zones, fluids are often invoked to explain slip processes on the megathrust,
from great earthquakes to slow-slip events and tectonic tremors. However, it is unclear how …

Distribution of methane plumes on cascadia margin and implications for the landward limit of methane hydrate stability

SG Merle, RW Embley, HP Johnson, TK Lau… - Frontiers in Earth …, 2021 - frontiersin.org
Nearly 3,500 methane bubble streams, clustered into more than 1,300 methane emission
sites, have been identified along the US Cascadia margin, derived both from archived …

Crustal structure of the northern Hikurangi margin, New Zealand: variable accretion and overthrusting plate strength influenced by rough subduction

AC Gase, HJA Van Avendonk, NL Bangs… - Journal of …, 2021 - Wiley Online Library
Exploring the structure of convergent margins is key to understanding megathrust slip
behavior and tsunami generation. We present new wide‐angle and marine multichannel …

The evolution of pore pressure, stress, and physical properties during sediment accretion at subduction zones

MA Nikolinakou, PB Flemings, B Gao… - Journal of Geophysical …, 2023 - Wiley Online Library
We study stress, pressure, and rock properties in evolving accretionary wedges using
analytical formulations and geomechanical models. The evolution of the stress state from …

Heterogeneous sediment input at the Nankai Trough subduction zone: Implications for shallow slow earthquake localization

H Tilley, GF Moore, MB Underwood… - Geochemistry …, 2021 - Wiley Online Library
Subducted sediment plays a key role in modulating pore pressure and seismic behavior at
subduction zones. We investigated the seismic character of incoming sediments to test how …

Seamount and ridge subduction at the Java margin, Indonesia: Effects on structural geology and seismogenesis

Y Xia, H Kopp, D Klaeschen, J Geersen… - Journal of …, 2023 - oceanrep.geomar.de
The Java‐Lesser Sunda margin, which features multi‐scale subducting oceanic basement
relief, is classified as neutral (Lombok and Sumbawa) to erosional (Central Java to Bali) in …

Structural controls on megathrust slip behavior inferred from a 3D, crustal‐scale, P‐wave velocity model of the Alaska Peninsula subduction zone

T Acquisto, A Bécel, JP Canales… - Journal of Geophysical …, 2024 - Wiley Online Library
In subduction zones, along‐strike and downdip variations in megathrust slip behavior are
linked to changes in properties of the subducting and overriding plates. Although marine …

Two‐Staged Rupture of the 19 October 2020  7.6 Strike‐Slip Earthquake Illuminated the Boundary of Coupling Variation in the Shumagin Islands, Alaska

Z Wan, D Wang, J Zhang, Q Li… - Seismological …, 2023 - pubs.geoscienceworld.org
On 19 October 2020, an M w 7.6 earthquake occurred within the Shumagin Islands, Alaska,
which is the largest strike‐slip earthquake occurred in the shallow subducted plates with …

An electrical resistivity image of the Hikurangi subduction margin

W Heise, EA Bertrand, TG Caldwell… - Geophysical Journal …, 2023 - academic.oup.com
Along the Hikurangi subduction margin, on the east coast of New Zealand's North Island, the
interplate coupling changes from locked in the south to weakly coupled in the north. New …