活断層調査のためのγ線測定方法の再検討

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タイトル別名
  • Reexamination of the Method of γ-Ray Surveys to Investigate Active Faults
  • カツダンソウ チョウサ ノ タメ ノ ガンマセン ソクテイ ホウホウ ノ サイ
  • Reexamination of the Method of γ-Ray Surveys to Investigate Active Faults

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Although γ-ray surveys have often been carried out in order to research active faults, clear correspondence of γ-ray intensity to faults has not always been obtained. We examined over again the methods of γ-ray surveys and the following two points came up as important problems.<br>(a) The hole to set the senser of γ-ray survey meter must be bored in the same radius and depth at each survey point.<br>(b) Much attention must be payed to the difference of surface materials.<br>In order to confirm the usefulness of the method in which the above two points are taken into consideration, the γ-ray surveys were carried out along a line across the Himenoyu fault. This fault was formed at the time of North-Izu earthquake in 1930, and its traces are yet clearly found. A clear peak of γ-ray intensity was obtained at the position on the fault.<br>Next, this method was applied to the Ono fault whose precise position has not yet known, and we estimated the position of the fault by the results of γ-ray surveys.

収録刊行物

  • 地震　第２輯

    地震　第２輯 37 (4), 539-547, 1984

    公益社団法人 日本地震学会

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