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대한지질학회 지질학회지 지질학회지 제37권 제4호(통권 제149호)
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    초록·키워드

    Total magnetic field measurements were collected over two adjacent seamounts in the western Pacific, the Ita Mai Tai (12° 50′N, 156° 50′E) and OSM2 (13° 55′N, 157° 35′E), as a part of manganese crust survey in June, 2000 onboard R/V Onnuri. High-resolution multibeam bathymetric data and total magnetic field near the sea surface were obtained for both seamounts. The magnetic anomaly data were inverted for best-fitting, least-squares, uniform magnetization based on the method of Plouff (1976), and the paleomagnetic poles were estimated. Assuming that the anomaly was caused by remanent magnetization, the inclination and declination of Ita Mai Tai are -53.2°, 25.0°, respectively, and those of OSM2 are -26.1°, 13.0°, respectively. The corresponding paleomagnetic poles for Ita Mai Tai and OSM2 are (49° 27′W, 37° 38′N) and (47° 53′W, 59° 29′N), respectively. In general, the seamounts exhibit low goodness of fit ratios with large residual anomalies. This is attributed to varying long-term non-dipole magnetic field and inhomogeneity in magnetization of the seamounts.

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      UCI(KEPA) : I410-ECN-0101-2012-450-004404458