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- W2082464232 abstract "Paleopoles derived from seamounts have been used to reconstruct the tectonic history of ocean basins; however, the interpretation of seamount magnetization models and the validity of seamount paleopoles may be affected by inhomogeneous magnetization. Multibeam bathymetric data, sea surface and deep‐tow magnetic field data, and paleomagnetic analyses of dredged samples were used to examine the origin of nonuniform magnetization within Jasper Seamount (30°27′N, 122°44′W). Models indicate that the seamount is predominantly reversely magnetized with local zones of normal polarity as corroborated by deep‐tow measurements. Lithologies likely to be volumetrically important in a seamount edifice show highly variable magnetic properties. Basalts have high intensities (0.5–27.0 A/m), high Koenigsberger ratios ( Q ) and low viscous remanence (VRM) acquisition. Low Q ratios and high VRM acquisition coefficients of coarse‐grained material and volcaniclastics suggest that they may have substantial viscous and induced components. Models for Jasper are characterized by low uniform intensities and far‐sided paleopoles. The shallow model inclinations may be attributed to nondipolar components in the time‐averaged geomagnetic field. The low intensities of the uniform models and the large nonuniform component in the seminorm solutions imply a complex distribution of magnetization sources within Jasper. This nonuniformity may result from either lithological variability or construction of the seamount spanning two or more polarity intervals." @default.
- W2082464232 created "2016-06-24" @default.
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- W2082464232 date "1988-10-10" @default.
- W2082464232 modified "2023-09-27" @default.
- W2082464232 title "Nonuniform magnetization of Jasper Seamount" @default.
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- W2082464232 doi "https://doi.org/10.1029/jb093ib10p12159" @default.
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