Mathematics – Logic
Scientific paper
Sep 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20.1879t&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 17, p. 1879-1882.
Mathematics
Logic
20
Earth Crust, Magnetic Anomalies, Mid-Ocean Ridges, Ocean Bottom, Seismology, Geological Faults, Magnetic Field Configurations
Scientific paper
Marine magnetic anomalies are traditionally modeled using a constant thickness source layer, usually defined as the extrusive lavas associated with seismic layer 2A. Recent seismic studies reveal that the thickness of layer 2A can vary by more than a factor of two, an observation which has important implications for the' magnetic anomaly source layer. We model deep-tow magnetometer data fron3 the Endcavour Segment of the Northern Juan de Fuc,x Ridge, in combination with nearby seismic data and find a positive correlation between the thickness of the seismically-defined layer 2A and the magnetic anomaly source layer. This suggests that short-wavelength magnetic anomalies observed within individual magnetic polarity units can arise from variations in the thickness of the extrusives, rather than geomagnetic field variations or secondary magnetization.
Johnson Howard P.
Tivey Maurice A.
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