Seismic refraction experiment at the amami plateau

Azusa Nishizawa, Kiyoshi Suyehiro, Hiroshi Shimizu

研究成果: Contribution to journalArticle査読

4 被引用数 (Scopus)

抄録

Seismic refraction profiles were shot at the Amami Plateau, an anomalous bathymetric high among many in the West Philippine Basin. A model of the crustal structure beneath the Amami Plateau consisting of materials with compressional wavespeeds 2.0, 2.8-3.8, 5.4-5.6, and 6.7 km/sec, with thicknesses 0.3-0.7, 1.0-2.0, and 3.0-4.0 km, layered from the top, was obtained. This indicates that the 5.4-5.6 km/sec layer characterizes the structure of the plateau and implies that a wavespeed of less than 5.6 km/sec occupies more than half the crust. It is suggested, therefore, that the crustal structure is different from that of normal oceanic. The sedimentary shear wavespeed was found to be 0.39 km/sec and Poisson's ratio 0.48 from P-PS delay time produced by phase conversion at the base of the sediment.

本文言語英語
ページ(範囲)159-171
ページ数13
ジャーナルjournal of physics of the earth
31
3
DOI
出版ステータス出版済み - 1 1983
外部発表はい

All Science Journal Classification (ASJC) codes

  • 地球惑星科学(全般)

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