巻号一覧
24 巻 (1990)
- 2 号 p. 79-
- 1 号 p. 1-
24 巻, 2 号
選択された号の論文の7件中1～7を表示しています
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追悼
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松尾 禎士1991 年 24 巻 2 号 p. i-iii
発行日: 1991/03/20
公開日: 2016/12/06
ジャーナル フリーPDF形式でダウンロード (488K)
会長特別寄稿
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綿秡 邦彦1991 年 24 巻 2 号 p. 79-83
発行日: 1991/03/20
公開日: 2016/12/06
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報文
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永峰 康一郎1991 年 24 巻 2 号 p. 85-94
発行日: 1991/03/20
公開日: 2016/12/06
ジャーナル フリーMineral spring gas compositions at several sites in central Japan have been monitored with gas chromatography for more than ten years in order to find pre-seismic anomalies. These measurements proved that a gas chromatograph is the most suit able apparatus for the in situ observation because it is durable and easily handled. In this study, a computer-based system for this observation has been developed. This system includes several instruments such as a gas inlet apparatus, a digital integrator and meteorological sensors. They are directly controlled by a personal computer which has enough expansion capacity and compatibility with our laboratory's one. The analytical results of gas compositions and the meteorological data are recorded on floppy disks and transmitted to our laboratory. A simple BASIC program executes these many functions of the computer, and it can be easily drawn up and revised if necessary. The data at a site showed that atmospheric pressure and temperature affect the result of gas analysis, but calculation of concentration ratio between each component in sample gas makes to correct the meteorological effect possible. In view of cost and reliability, this monitoring system is applicable widely for continuous on-site measurements in seismo-geochemistry.抄録全体を表示PDF形式でダウンロード (789K) -
武藤 倫子, 松葉谷 治1991 年 24 巻 2 号 p. 95-104
発行日: 1991/03/20
公開日: 2016/12/06
ジャーナル フリーSecular variations in chemical composition, temperature and isotopic ratio in Zenikawa Hot Spring can be explained by changes in mixing ratios of three components, i. e. a Na-Cl type thermal water which is same as the thermal water flowing from Iwanoyu before later 1950's, a shallow ground water similar to cold water from the wells for prevention of land sliding, and a steam seperated from the Na-Cl type thermal water through boiling underground. The variations were caused by two successive changes in the mixing ratios. In the first change, the fraction of Na-Cl type thermal water was decreasing and inversely the fractions of shallow ground water and steam were increasing. This change is due to boiling of the Na-Cl type thermal water and mixing of the shallow ground water, which were caused by pressure decreasing of the thermal water underground. After 1975, the ratio of the thermal water and the steam became constant. The second change happened following a drastic change of discharge rate during 1979 to 1982. In this change, the fraction of Na-Cl type thermal water turned increasing. This suggests that the pressure decreasing of shallow ground water was more than that of the Na-Cl type thermal water.抄録全体を表示PDF形式でダウンロード (814K) -
伊藤 正義, 高田 秀重, 小倉 紀雄1991 年 24 巻 2 号 p. 105-114
発行日: 1991/03/20
公開日: 2016/12/06
ジャーナル フリーDuring a storm event (49mm/12hr), riverine suspended solid samples (Nogawa River) and street run-off samples were taken and analyzed for two micro organic pollutants, polycyclic aromatic hydrocarbons (PAHs) and linear alkylbenzenes (LABs). The former is mainly originated by combustion of fossil fuels and the later is supplied to rivers by domestic consumption of synthetic detergents. PAHs and LABs concentration in the river water was 10ng/l and 13ng/l before rising stage and 310ng/l and 210ng/l in rising stage, respectively. There were correlations between the flux of river water and the flux of PAHs and LABs. The total flux of PAHs and LABs during this storm event was 72 and 22 times greater than those for the normal river stage, indicating that vast amounts of pollutants are transported downstream by storm event. It is estimated that direct input of urban run-off waters and resuspended bottom sediments contribute to the increase in flux of PAHs at rising river stage. Although both contributions varied with time, the contribution of resuspended sediments to the total increase was predominant.抄録全体を表示PDF形式でダウンロード (926K) -
市橋 秀樹, 森田 秀芳, 本田 克久, 立川 涼1991 年 24 巻 2 号 p. 115-121
発行日: 1991/03/20
公開日: 2016/12/06
ジャーナル フリーNon-cultivated soils derived from various parent materials were collected from the western part of Shikoku Ialand, Japan, The samples were digested with a mixture of nitric, perchloric and sulphuric acids and REEs in the extracts were determined by inductively coupled plasma-atomic emission spectroscopy (ICP-AES). Results were as follows. 1) Among 16 REEs analysed, 3 REEs (Yb, Sc and Y) were found in all samples and La, Ce, Nd, Eu, Gd, Dy and Lu were also found in almost all samples. 2) Oddo-Harkins' law is satisfied in distribution pattern of REEs in the soils studied. 3) La, Ce and Nd were higher in the soils derived from acidic rocks than from basic rocks. On the other hand, Sc and Gd were higher in the soils derived from basic rocks. 4) Heavy REE concentrations in solis were not affected by silicate concentrations in parent meterials. 5) In many soils analysed, REE concentrations increased with the depth of the layer, suggesting that REEs are released with the advance of soil formation. 6) Light REEs (La, Ce) often accumulate in surface layer. They might have affinity to organisms. 7) Above mentioned results are useful for the investigation of REEs behavior in the soil-plant-animal system.抄録全体を表示PDF形式でダウンロード (707K) -
金井 豊, 坂巻 幸雄, 瀬尾 俊弘1991 年 24 巻 2 号 p. 123-132
発行日: 1991/03/20
公開日: 2016/12/06
ジャーナル フリーUranium series nuclides such as 238U, 234U, 226Ra and 222Rn, were measured in the groundwaters and surface waters around the Tono uranium mine and their geochemical behaviors and hydrogeochemical implications were investigated. 238U contents in the groundwaters were low because the groundwater was reducing and its pH was high. 226Ra contents were higher than the equilibrium amounts of 238U, which suggests that radium is easy to move than uranium. 222Rn was abundant in the groundwaters from several hundreds times to several ten thousands times than its precursor 226Ra, which inferred that much amount of radon was supplied by the rocks and ore body through micro paths. 234U/238U activity ratios of some groundwaters were high (about 6). It may be because the water is reducing and uranium is leached from the clay minerals that adsorb uranium relatively weakly. The waters from the Sublevel gallery of the Tono mine were low in radon content and 222Rn/226Ra activity ratios, which suggests that the water originated not in the deep groundwater, but in the shallow groundwater.抄録全体を表示PDF形式でダウンロード (1133K)
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