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Resolution experiments for NW Pacific subduction zone tomographyResults are reported from an investigation of the resolving power of ISC/NEIC P travel-time data in tomographic inversions for the geometry of the subduction zones in the NW Pacific. From thermal models for the Kurile, Janan, Izu-Bonin, Mariana, and Ryukyu slabs, three-dimensional synthetic velocity anomalies for subducting slabs are generated and projected onto a cell model for the uppermost 1400 km of the mantle. These synthetic models are used to compute synthetic delay times for ray paths corresponding to the source and receiver locations used for the actual data, add Gaussian noise, invert the synthetic data, and compare the resulting velocity structure to the initial synthetic models. This comparison is illustrated for sections through the Kuriles and the Mariana arcs. A variety of resolution artifacts are observed, which in many cases resemble features visible in the tomographic results obtained from inverting the actual ISC/NEIC data.
Document ID
19900036075
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Spakman, Wim
(Utrecht State Univ. Netherlands)
Van Der Hilst, Rob
(Utrecht State Univ. Netherlands)
Wortel, Rinus
(Utrecht Rijksuniversiteit, Netherlands)
Stein, Seth
(Northwestern University Evanston, IL, United States)
Date Acquired
August 14, 2013
Publication Date
October 1, 1989
Publication Information
Publication: Geophysical Research Letters
Volume: 16
ISSN: 0094-8276
Subject Category
Geophysics
Accession Number
90A23130
Funding Number(s)
CONTRACT_GRANT: NSF INT-86-10654
CONTRACT_GRANT: NAG5-1156
CONTRACT_GRANT: NSF EAR-86-18038
CONTRACT_GRANT: NATO-0910/87
Distribution Limits
Public
Copyright
Other

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