巻号一覧
20 巻 (1980)
- 4 号 p. 99-
- 3 号 p. 67-
- 2 号 p. 37-
- 1 号 p. 1-
20 巻, 1 号
選択された号の論文の4件中1～4を表示しています
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青柳 宏一1980 年 20 巻 1 号 p. 1-10
発行日: 1980/03/25
公開日: 2011/09/20
ジャーナル フリーDiagenesis is defined as the process involving physical and chemical changes in sediment after deposition that convert it to consolidated rock. In the paper, the physical and chemical factors controlling diagenesis and the stage of diagenesis in sediments were reviewed. Especially, diagenetic changes of pores, pore-fluids and mineral grains in the Neogene argillaceous sediments of Japan were reported in detail. On the other hand, latest theories on the generation and migration of petroleum by many investigators in Japan and elsewhere were also reviewed.抄録全体を表示PDF形式でダウンロード (1350K) -
笹木 敏1980 年 20 巻 1 号 p. 10-21
発行日: 1980/03/25
公開日: 2011/09/20
ジャーナル フリーIntraformational foldings exist in the banded clay bed at the upper part of the Sangoku Formation (upper Pleistocene) around Daisetu Lake, Hokkaido, Japan. These foldings were studied on the basis of geological and soil mechanical examinations. The forces which caused the intraformational foldings in this area and the origin of these foldings are discussed in this paper.
The results of studies are as follows 1) The banded clay bed is considered to be of the late Wurm glacial stage. 2) The intraformational foldings have the same direction of inclination, and it also coincides the direction of the force received. 3) The clay around the intraformational foldings is over consolidation clay, but the other clay is normal consolidation clay. 4) The place where the force was received and the zone influenced by the force can be assumed from analysis of the former maximum pressure. 5) Three geologic columns of different outcrops can be correlated on the basis of the presence of the intraformational foldings. From the columns it is suggested that the banded clay have suffered from heavy pressure 7-10 times.
From these results the following conclusions may be drawn. The banded clay was deposited in Paleo Lake Daisetu in the late Wurm glacial stages. Masses of ice and snow sometimes flowed into the lake from the east slope of the Daisetu Mountains. Therefore this clay was dragged by the masses of ice and snow, and then the intraformational foldings were formed in the banded clay bed. Hight of the masses of ice and snow can be estimated to be 60-65 m.抄録全体を表示PDF形式でダウンロード (7157K) -
林 剛, 宋 宗澤, 西田 明生, 後藤 誠史, 大門 正機, 近藤 連一, 杉森 健一郎1980 年 20 巻 1 号 p. 21-30
発行日: 1980/03/25
公開日: 2011/09/20
ジャーナル フリーSynthetic mica, NaMg2.5 (Si4O10) F2 (Na-TSM), was treated with HCl solution and the correlations between the dissolutions of chemical components and the changes ofspecific surface area caused by the collapse of crystal structure were investigated.
3.00g of Na-TSM was dispersed in 300ml of 0.1N HCl at 60°C. The replacement of Na2+ ion in the interlayer space and of Mg2+ ion dissolved from octahedral layer by H+ ion took place fast. The dissolution of Mg2+ ion facilitated the dissolution of Fion accompanied with Si4+ ion coordinated in tetrahedral layer and then resulted in making mica particles fine. Meanwhile, MgF2 would first presipitate from the liquid phase and then the decrease of F- ion concentration in the liquid resulted in the precipitation of silica gel.
The maximum values of specific surface area of 1 hour treated Na-TSM obtained by N2 adsorption method and ethyleneglycol monoethyl ether adsorption method were 210 m2/g and 1100 m2/g respectively. Na-TSM decomposed completely to MgF2 and silica gel within 24 hours. The measurement of pore size distribution of 1 hour treated Na-TSM showed the existence of many micro pores with radii less than 40Å.
Na-montmorillonite was also similarly treated with HCl solution. The rate of ion dissolution from Na-montmorillonite was found to be slower than that from Na-TSM.
The maximum values of specific surface area obtained by N2 adsorption method and ethyleneglycol monoethyl ether adsorption method were 50 m2/g for 4 hours treated Namontmorillonite and 880m2/g for 1 hour treated Na-montmorillonite respectively.抄録全体を表示PDF形式でダウンロード (3785K) -
金岡 繁人, 加藤 悦三1980 年 20 巻 1 号 p. 31-36
発行日: 1980/03/25
公開日: 2011/09/20
ジャーナル フリーHunyu clay from Hunyu, Tochigi Prefecture was investigated mineralogically. X-rayanalysis shows the clay to be a regularly interstratified micasmectite mineral. It gives the basal reflection at 25Å, and its higher orders. After treated with ethylene glycol, glycerol and water, the 25Å basal spacing changes to 26.6, 27.4 and 28.4Å respectively. Chemical composition is analysed as SiO2 46.62%, TiO2 0.20%, Al2O3 33.32%, Fe2O3 0.76%, CaO 1.81%, MgO 0.27%, K2O 2.22%, Na2O 1.92%, H2O (-) 7.30% and H2O (+) 6.37%. The composition is close to that of rectorite. IR spectrum in the OH region shows two absorption bands at 3640 and 3400 cm-1. The band at 3400 cm-1 almost disappears at 500°C. The 3640 cm-1 band weakens at 600°C and weak shoulders appear at 3680 and 3630 cm-1. The specimen heated at 800°C shows two weak absorp-tion bands at 3650 and 3470 cm-1 and they change to 3640 and 3440 cm-1 keeping in air for a week.抄録全体を表示PDF形式でダウンロード (643K)
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