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首页> 外文期刊>Earth, planets and space: EPS >Paleomagnetism of seamounts in the West Philippine Sea as inferred from correlation analysis of magnetic anomalies
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Paleomagnetism of seamounts in the West Philippine Sea as inferred from correlation analysis of magnetic anomalies

机译：从磁异常的相关分析推论西菲律宾海海山的古磁性

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摘要

Magnetization vectors of seamounts and edifices in the West Philippine Sea were determined with a direct searching method in the space domain using the topography and magnetic anomaly data at the sea surface. The data analyzed were surveyed by the Hydrographic and Oceanographic Department of Japan since the 1980s. Several seamounts in the eastern part of the Minami Daito Basin are magnetized in the N70degreesW to N80degreesW directions with negative shallow inclinations, whereas edifices of the Kyushu-Palau Ridge have directions of N30degreesW with downward inclinations. The paleolatitude of the Oki-Daito Ridge as a whole is 4.4degreesS +/- 11.0degrees and that of the Amami Plateau and the Daito Ridge, 15.1degreesN +/- 4.6degrees and 20.1degreesS +/- 8.2degrees, respectively. These results are inconsistent with the proposed clockwise rotation of the West Philippine Sea exceeding 80degrees. Furthermore, the results also suggest that the Oki Daito Ridge was generated in the Southern Hemisphere and then migrated northward. The large shortening between the Oki-Daito Ridge and the Amami-Daito Ridge regions may suggest the convergence boundary between them.
机译：利用海面地形和磁异常数据，通过直接搜索方法在空间域中确定了西菲律宾海海山和建筑物的磁化矢量。自1980年代以来，所分析的数据已由日本水文海洋学部调查。南大东盆地东部的一些海山在N70度到N80度的方向上被磁化，并具有浅的负倾角，而九州-帕劳岭的建筑物的北倾方向则为N30度。 Oki-Daito山脊的古纬度整体为4.4度S +/- 11.0度，Plate美高原和Daito山脊的古纬度分别为15.1度N +/- 4.6度和20.1度S +/- 8.2度。这些结果与西菲律宾海的顺时针旋转超过80度的提议不一致。此外，结果还表明，冲木大岭在南半球产生，然后向北迁移。 Oki-Daito山脊和Amami-Daito山脊区域之间的大幅缩短可能暗示了它们之间的收敛边界。

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