巻号一覧
4 巻 (1964 - 1965)
- 3-4 号 p. 99-
- 2 号 p. 50-
- 1 号 p. 3-
4 巻, 3-4 号
選択された号の論文の3件中1～3を表示しています
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青柳 宏一1965 年 4 巻 3-4 号 p. 99-112
発行日: 1965/08/01
公開日: 2011/09/20
ジャーナル フリーSince 1961, the writer has studied on the mineralogy of sedimentary rocks in the oil field areas of Japan and analyzed over a thousand rock samples mainly by X-ray diffraction method.
In this paper, the writer discuseed the influences of various gelogical factors upon the mineral compostions in sedimentary rocks. The results were concluded as follows:
1. The mineral compositions in sedimentary rocks have been influenced by the difference of parent materials which were brought at the first stage of sedimentation. For instance, the mineral compositions of tuffs or sand stones are differed considerably from those of mud stones.
2. These variations are also influenced by the difference of sedimentary environment. Namely, the sedimentary rocks formed in the marine environment contain such minerals as montmorillonite, illite and chlorite, as well as calcite especially in the bathyal environment. On the other hand, the sedimentary rocks formed in the littoral environment or lagoon contain such minerals as kaolin, illite and chlorite.
3. The hydrothermal actions caused by the intrusion of volcanic rocks have influenced strongly to the mineral compositions of sedimentary rocks. In these cases, hydrothermal minerals such as sericite, chlorite and feldspars are formed.
4. Even in the same basin, the lower formations are generally characterized by the much more contents of illite and chlorite than those of montmorillonite, because the formers are considered to be more stable minerals than the latter through the diagenesis. While it is also remarkable that secondary minerals such as calcite and quartz have been formed under the compression effect during the process of diagenesis.抄録全体を表示PDF形式でダウンロード (1331K) -
今井 直哉, 大塚 良平, 渡辺 晃二1965 年 4 巻 3-4 号 p. 113-126
発行日: 1965/08/01
公開日: 2011/09/20
ジャーナル フリーThe hematite deposits of the Akatani mine are of hydrothermal-metasomatic origin, connected genetically with soda-rhyorite of mid-Miocene in age. And the ore deposits are characterized by marked hydrothermal alteration of wallrocks, especially the presence of alteration products of skarn minerals is an outstanding feature.
Hypogene kaolin minerals (dickite and kaolinite) also occur in the ore deposits and their environs, associated with hematite, hydrous ferric oxide and siderite. Among the kaolin minerals, kaolinite was examined by means of microscopic observation, X-ray diffractometry, thermal study and electron microscopy.
The results clarified the kaolinite to be a well-crystallized one. The main purpose of this paper is to present some mineralogical data of the kaolinite and to discuss the meaning of its occurrence in relation to ore genesis.抄録全体を表示PDF形式でダウンロード (3688K) -
第一報粘土鉱物に対するリン酸の作用小橋 偕子1965 年 4 巻 3-4 号 p. 127-146
発行日: 1965/08/01
公開日: 2011/09/20
ジャーナル フリーThe mechanism of stabilization of clay soils with phosphoric acid was investigated by unconfined compressive strength, phosphrous fixation, x-ray diffraction analysis, infrared absorption analysis, differntial thermal analysis and others. As the result of phosphoric acid treatment of various clay minerals and soils, it was recognized that the degrees of improvement depend on the types and crystallinities of clay minerals. Chlorite minerals appeared to be most reactive of clay minerals even when the highly-crystalline samples. The poorly-crystalline kaolin minerals were much reactive, while the highly-crystalline samples were not so. Illite and montmorillonite were reactive when the degrees of their crystallinities were very poor. The phosphoric acid attacks the clay mineral structures and produce a gel with Al and Fe, which causes the cementation of soil particles. The DTA curves of clay minerals treated with phosphoric acids frequently showed the sharp exothermic peaks at the temperatures between the begining and the maximum of (OH) dehydration peaks. The X-ray diagrams of treated samples of kaolinite which have the exothermic peak of DTA curve show new peaks when samples were heated to the temperatures of the exothermic peaks, on the other hand, a gel which was isolated from the sample changes to the same crystalline structure even when heated at 105°C. This shows the presence of a bond between a gel and clay minerals.抄録全体を表示PDF形式でダウンロード (1328K)
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