Article thumbnail


By 春男 高橋, 純 佐藤 and 和郎 佐藤


The environmental gamma radiation from basaltic lava flow units and the radon concentration in ground waters around the Fuji volcano were measured with a portable liquid scintillation counter newly developed for field survey. Gamma-ray spectrometry was carried out on some lava samples with a Ge(Li) spectrometer. The observed environmental radioactivites ranged from 88 to 170 cpm, being lower than the values of ordinary andesitic lavas, for example, 190-220 cpm for the Asama volcano. This is consistent with the Th- and U-series radio-activities and K contents of the lavas from the Fuji volcano which may be incorporated into the group of lower values among gamma-ray spectrometric results so far obtained for Japanese Quaternary volcanoes. The Th-series/K, the U-series/K and the Th-series/U-series ratios of the Fuji volcano are 1.9, 2.9 and 0.7, respectively, each falling within the range observed for the Izu-Mariana volcanic arc. The radon concentration in ground water around the Fuji volcano was in the range of 0.1-0.6 × 10-10Ci/l

Topics: 453
Publisher: 明治大学工学部
Year: 1982
OAI identifier:
Provided by: UT Repository
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • (external link)
  • Suggested articles

    To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.