巻号一覧
44 巻, 1 号
選択された号の論文の5件中1～5を表示しています
- |<
- <
- 1
- >
- >|
-
モード組成とその比較楠 利夫, 武蔵野 実原稿種別: 本文
1990 年 44 巻 1 号 p. 1-11
発行日: 1990/01/25
公開日: 2017/06/06
ジャーナル オープンアクセスPermo-Triassic sandstones from the Ultra-Tamba Zone and the Maizuru Belt, and sandstones with corresponding lithology from the Tamba Belt were analyzed for those modal compositions. In the Tamba Belt, some sandstones lying on the uppermost unit (TIIc) of the Tamba Group, are very similar to the Hikami Formation of the Ultra-Tamba Zone in those lithology and age. They compose a tectonic unit together with the Takashiroyama Formation, the Ajima Formation and the lower Cretaceous Sasayama Group. Sandstone of the Takashiroyama Formation closely resembles to that of upper Triassic Nabae Group in the Maizuru Belt. Thus, this distinctive unit belongs to the Triassic accretionary terranes rather than those of Jurassics. Another type of sandstones are also recognized in the synform regions of the Tamba Belt. They are accompanied with the sandy shales yielding the late Triassic fossil remains, and differentiated from the adjacent sandstone of the Type TIIc, early Jurassic in age. Therefore, this type of sandstone formation may constitute the Tlld unit of the Tamba Belt. As for the Ultra-Tamba Zone, the sandstone of the Oi Formation (Uppermost Permian) has intermediate composition between those of the Maizuru Group (upper Permian) and the Yakuno Group (lower Triassic) in the Maizuru Belt, and resembles to both of them. Sandstone of the Hikami Formation (upper Permian) is quiet different from those of the Oi Formation and the Maizuru Belt.抄録全体を表示PDF形式でダウンロード (1315K) -
田 景瑞原稿種別: 本文
1990 年 44 巻 1 号 p. 12-30
発行日: 1990/01/25
公開日: 2017/06/06
ジャーナル オープンアクセスSince the 18th century, many geologists have been working hard to research the geologic movements. They have conducted a great deal of exploration in the field and studied the manner of the tectonic moving mechanics. Their great contribution is the important crystal of geologic development made by mankind. But the manner of geologic movements and its dynamics are under exploration. We can't explain it completely. In this paper the writer will prove the force of moving magma which is an important source of the erogenic movement. The tectonic moving force are of many centres and are not unified. The tidal force, the rotation of the Earth, the continental drift and the plate tectonics etc. originated from the unified. The location of the magma generating may be confined by the quantity of radial materials, by the depth of radial material concentration and by the degree of the fault zone developing. Where the radial materials greatly concentrated is the area of high temperature and high pressure and of strong expanding force. Owing to this expanding force the Earth crust may uplift, but this strong pressure will be reduced if it goes through the fault zone and so the materials in this area may melt into magma. If the magma intrudes into the earth crust where there are not many faults, it may cause epeirogenesis, and on the contrary it may form orogenic zone-upheaval region that expands and compresses the surrounding parent rocks. Because the orogenic zone is the earthquake zone, the volcanic zone, the upheaval region of expanding and compressing the surrounding parent rock, we can conclude in one word: the orogenic zones are the swell scars in the earth crust. The above conclusion can be proved by all information we collected about the orogenic zones in China. Because the orogenic zones are upheaval regions with great bodies and with large heights, and involve many large igneous rock bodies, and are folded, faulted and metamorphosed strongly, and have many overthrusts or unsymmetric folds on its both sides, falling to the outside of orogenic zone, and further from the orogenic zone, these structures may weaken step by step.抄録全体を表示PDF形式でダウンロード (2510K) -
間島 信男, 三島 弘幸, 野中 義彦原稿種別: 本文
1990 年 44 巻 1 号 p. 31-35
発行日: 1990/01/25
公開日: 2017/06/06
ジャーナル オープンアクセスPDF形式でダウンロード (941K) -
大草 重康原稿種別: 本文
1990 年 44 巻 1 号 p. 36-43
発行日: 1990/01/25
公開日: 2017/06/06
ジャーナル オープンアクセスHenkel (1982) tailed as followings for engineering geology, "Engineering geologists have to answer three questions in their practice. What is the geological structure at a site ? How has its structure been formed in the geological history? What will happen as a result of the change in the environmental factors?" All these questions are closely concerned with field geology, structural geology, Quaternary geology, neotectonics, geomorphology and earth surface processes. It is impossible to answer the three questions without accumulated knowledge of these disciplines backgrounded by painstaking field observations. Without the interdisciplinary approach any geotechnical problems can not be correctly solved. On the basis of the present writer's personal experience in engineering geology, the importance of geological science is stressed in the successful achievement of civil engineering works. Every theory in engineering geology or geotechnical engineering has two facets, philosophical background and an analytical facet. Effective use of theories in engineering geology and geotechnical engineering is essential to reasoning, discovering and predicting skillfully earth surface behavior in civil engineering. Collaboration between geologists and geotechnical engineers with common words is the key to the successful practice and future development in geotechnical engineering. The common interest in geomorphology, neotechtonics and earth surface processes may be a useful link to enable both the geological and engineering skills to be mobilized (Henkel, 1982).抄録全体を表示PDF形式でダウンロード (1097K) -
原稿種別: 本文
1990 年 44 巻 1 号 p. 44-45
発行日: 1990/01/25
公開日: 2017/06/06
ジャーナル オープンアクセスPDF形式でダウンロード (330K)
- |<
- <
- 1
- >
- >|