15. 火山岩の磁化曲線
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概要
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With the aid of ballistic method, the magnetic hysteresis curve of various volcanic rocks in the field of from 0 to 4000 Oe. was determined, the results being shown in Figs.2-13. Athough the intensity of saturation magnetization of various rocks is nearly proportional to the amount of Fe_3O_4 contained in them, their coersive force ranges from 60 to 465 Oe. It was further noticed that, as shown in Fig.16, the ratio of intensity of saturated thermo-remanent magnetization in the unit magnetic field to that of saturation magnetization is nearly proportional to the coersive force; in other words, a magnetically hard rock acquires large thermo-remanent magnetization.
- 東京帝国大学地震研究所,Earthquake Research Institute, Tokyo Imperial University,地震研究所の論文
- 1944-08-15
東京帝国大学地震研究所,Earthquake Research Institute, Tokyo Imperial University,地震研究所 | 論文
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