Mapping fluids to subduction megathrust locking and slip behavior

Research output: Contribution to journalComment/debate

8 Citations (Scopus)

Abstract

In subduction zones, high fluid content and pore pressure are thought to promote aseismic creep, whereas well-drained conditions are thought to promote locking and failure in earthquakes. However, observations directly linking fluid content and seismic coupling remain elusive. Heise et al. (2017) use a magnetotelluric survey to image the electrical resistivity structure of the northern Hikurangi subduction thrust to ~30 km depth, as an indicator of interconnected fluid content. The authors document a clear correlation between high resistivity and a distinct geodetically locked patch and between conductive areas and weak coupling. Their study, together with other recent geophysical investigations, provides new evidence for the role of fluids in governing subduction thrust locking.

Original languageEnglish (US)
Pages (from-to)9337-9340
Number of pages4
JournalGeophysical Research Letters
Volume44
Issue number18
DOIs
StatePublished - Sep 28 2017

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locking
slip
subduction
fluid
fluids
thrust
electrical resistivity
pore pressure
creep
subduction zone
earthquakes
porosity
well
earthquake

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

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title = "Mapping fluids to subduction megathrust locking and slip behavior",
abstract = "In subduction zones, high fluid content and pore pressure are thought to promote aseismic creep, whereas well-drained conditions are thought to promote locking and failure in earthquakes. However, observations directly linking fluid content and seismic coupling remain elusive. Heise et al. (2017) use a magnetotelluric survey to image the electrical resistivity structure of the northern Hikurangi subduction thrust to ~30 km depth, as an indicator of interconnected fluid content. The authors document a clear correlation between high resistivity and a distinct geodetically locked patch and between conductive areas and weak coupling. Their study, together with other recent geophysical investigations, provides new evidence for the role of fluids in governing subduction thrust locking.",
author = "Demian Saffer",
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Mapping fluids to subduction megathrust locking and slip behavior. / Saffer, Demian.

In: Geophysical Research Letters, Vol. 44, No. 18, 28.09.2017, p. 9337-9340.

Research output: Contribution to journalComment/debate

TY - JOUR

T1 - Mapping fluids to subduction megathrust locking and slip behavior

AU - Saffer, Demian

PY - 2017/9/28

Y1 - 2017/9/28

N2 - In subduction zones, high fluid content and pore pressure are thought to promote aseismic creep, whereas well-drained conditions are thought to promote locking and failure in earthquakes. However, observations directly linking fluid content and seismic coupling remain elusive. Heise et al. (2017) use a magnetotelluric survey to image the electrical resistivity structure of the northern Hikurangi subduction thrust to ~30 km depth, as an indicator of interconnected fluid content. The authors document a clear correlation between high resistivity and a distinct geodetically locked patch and between conductive areas and weak coupling. Their study, together with other recent geophysical investigations, provides new evidence for the role of fluids in governing subduction thrust locking.

AB - In subduction zones, high fluid content and pore pressure are thought to promote aseismic creep, whereas well-drained conditions are thought to promote locking and failure in earthquakes. However, observations directly linking fluid content and seismic coupling remain elusive. Heise et al. (2017) use a magnetotelluric survey to image the electrical resistivity structure of the northern Hikurangi subduction thrust to ~30 km depth, as an indicator of interconnected fluid content. The authors document a clear correlation between high resistivity and a distinct geodetically locked patch and between conductive areas and weak coupling. Their study, together with other recent geophysical investigations, provides new evidence for the role of fluids in governing subduction thrust locking.

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JO - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

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