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Intermediate-wavelength magnetic anomaly field of the North Pacific and posible source distributionsA technique that eliminates external field sources and the effects of strike aliasing was used to extract from marine survey data the intermediate wavelength magnetic anomaly field for (B) in the North Pacific. A strong correlation exists between this field and the Magsat field although a directional sensitivity in the Magsat field can be detected. The intermediate wavelength field is correlated to tectonic features. Island arcs appear as positive anomalies of induced origin likely due to variations in crustal thickness. Seamount chains and oceanic plateaus also are manifested by strong anomalies. The primary contribution to many of these anomalies appears to be due to a remanent magnetization. The source parameters for the remainder of these features are presently unidentified ambiguous. Results indicate that the sea surface field is a valuable source of information for secular variation analysis and the resolution of intermediate wavelength source parameters.
Document ID
19850044263
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Labrecque, J. L.
(Lamont-Doherty Geological Observatory Palisades, NY, United States)
Cande, S. C.
(Lamont-Doherty Geological Observatory Palisades, NY, United States)
Jarrard, R. D.
(Lamont-Doherty Geological Observatory Palisades, NY, United States)
Date Acquired
August 12, 2013
Publication Date
February 28, 1985
Publication Information
Publication: Journal of Geophysical Research
Volume: 90
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
85A26414
Funding Number(s)
CONTRACT_GRANT: NSF OCE-83-17174
CONTRACT_GRANT: NAS5-25891
Distribution Limits
Public
Copyright
Other

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