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Constraining the hydration of the subducting Nazca plate beneath Northern Chile using subduction zone guided waves

Abstract:

Guided wave dispersion is observed from earthquakes at 180–280 km depth recorded at stations in the fore-arc of Northern Chile, where the 44 Ma Nazca plate subducts beneath South America. Characteristic P-wave dispersion is observed at several stations in the Chilean fore-arc with high frequency energy (>5 Hz) arriving up to 3 s after low frequency (<2 Hz) arrivals. This dispersion has been attributed to low velocity structure within the subducting Nazca plate which acts as a waveguide,...

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Publication status:
Published
Peer review status:
Peer reviewed
Version:
Publisher's version

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Publisher copy:
10.1016/j.epsl.2017.06.041

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Institution:
University of Oxford
Division:
MPLS Division
Department:
Earth Sciences
Role:
Author
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Grant:
VERCE project (project number 283543)
Publisher:
Elsevier Publisher's website
Journal:
Earth and Planetary Science Letters Journal website
Volume:
474
Pages:
237-247
Publication date:
2017-07-17
Acceptance date:
2017-06-25
DOI:
ISSN:
0012-821X
Pubs id:
pubs:742609
URN:
uri:a7415f65-f233-462e-b162-cec69e0f9ba4
UUID:
uuid:a7415f65-f233-462e-b162-cec69e0f9ba4
Local pid:
pubs:742609

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