巻号一覧
12 巻 (1972 - 1973)
- 4 号 p. 133-
- 3 号 p. 97-
- 2 号 p. 51-
- 1 号 p. 1-
12 巻, 4 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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金原 啓司, 下田 右1973 年 12 巻 4 号 p. 133-141
発行日: 1973/02/25
公開日: 2011/09/20
ジャーナル フリーSome ferro-magnesian clay minerals occur in amygdales of pillow lavas from the Sunakobuchi formation (Miocene), western part of the Taiheizan, Akita Prefecture, Japan. A brown-coloured material (sample A) occurs in amygdales in the inner part of the pillow lava. This material is indentified as an iron-rich saponite by X-ray and chemical analyses. A dark green-coloured material (sample B) occurs in amygdales in the outer part of the pillow lava. Mineralogical properties of the sample B differ from those of the sample A. The visual inspection method of X-ray diffraction patterns before and after treatments clearly shows that the sample B is a randomly interstratified mineral of chlorite (0.45) and saponite (0.55). A small amount of celadonite also occurs sporadically in amygdales associated with the interstratified mineral.抄録全体を表示PDF形式でダウンロード (965K) -
西山 勉, 石川 幸洋, 下田 右1973 年 12 巻 4 号 p. 142-150
発行日: 1973/02/25
公開日: 2011/09/20
ジャーナル フリーClay minerals are found associated with the Kuroko ores at the Shakanai mine as alteration products of tuffaceous sediments formed by submarine volcanic activities. Core samples from the Shakanai No.11 deposit contain illite and chlorite. The present investigation was undertaken to reveal the variation of the nature on illite and chlorite with depth and lithology of the Shakanai Formation at the Shakanai No.11 deposit and following results were obtained.
(1) On the basis of X-ray powder diffraction, infra-red analysis and electron micrograph, illite can be grouped into three types A, B, C in the core.
Type A is found with chlorite and has properties of a 1M polymorph. It shows characteristic elongated-tabular habit like needle. Its particle size measured by the Jones' method is 170-200A.
Type B is appeared in and/or near the Kuroko ore body and has properties of a 2M polymorph. Its morphorogy is very thin plate habit from irregular to hexagonal form and their aggregated parts are ambiguous under electron micrograph. This type clearly contains a small amount of expandable layers.
Type C is associated with calcite in the Kuroko ore body and shows a very strong (001) reflection in comparison to a (002) one and it is 1M polymorph. It shows very fine (0.1-0.5 micron) regular hexagonal thin plate.
(2) Fe content in chlorite gradually decreases in the structure with depth of the core, but Al value of the replacement of Si is not changed in the core. Therefore, the chlorite is changed from pycnochlorite to clinochlorite with depth of the core. Fe in chlorite is occupied selectively its structural position in the silicate layer rather than in the brucite layer. But chlorite in the tuff of the bottom of the core contained more Fe in the brucite layer than in the silicate layer.抄録全体を表示PDF形式でダウンロード (14934K) -
ハイドロサルファイトによる還元処理大津賀 望, 林 剛, 素木 洋一1973 年 12 巻 4 号 p. 151-159
発行日: 1973/02/25
公開日: 2011/09/20
ジャーナル フリーThe effect of atmosphere on the removal of iron oxide from “Ohata clay”, mainly composed of kaolin minerals, was studied by using sodium dithionite-sulfuric acid system.
The removal treatment of iron oxide from clays is commonly carried out in air, while in this case, sodium dithionite is reacted not only with iron oxide in clay but with the oxygen dissolved in clay suspension and the air mingled into clay suspension during agitation. Therefore the efficiency of reducing agent for the reduction of iron oxide is lowered.
In this experiment the reaction chamber was operated in three different atmospheric conditions, that is, in air, under inert gas and under deaired condition and the influence of those conditions on the extraction of iron oxide from clay was examined.
Under deaired condition, it was found that reducing agent was the most effective in the extraction of iron oxide from clay, with the solution of pH values from 2 to 3.
The amount of the iron oxide extracted by the treatment was about 60 percent and sulfur produced was very small in amount after the removal treatment of iron oxide.
Using the reducing agent enclosed by geratin capsule, the operation was simplified and the reduction efficency was increased.抄録全体を表示PDF形式でダウンロード (3022K) -
須藤 俊男1973 年 12 巻 4 号 p. 160-162
発行日: 1973/02/25
公開日: 2011/09/20
ジャーナル フリーPDF形式でダウンロード (263K)
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