巻号一覧
41 巻 (1987)
- 6 号 p. 297-
- 5 号 p. 253-
- 4 号 p. 205-
- 3 号 p. 151-
- 2 号 p. 81-
- 1 号 p. 1-
41 巻, 2 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
- >
- >|
-
長野県地学教師グループ原稿種別: 本文
1987 年 41 巻 2 号 p. 81-100
発行日: 1987/03/25
公開日: 2017/06/06
ジャーナル オープンアクセスSevere earthquake on September 14, 1984, which occurred 10 km southeast off Mt. Ontake, recorded seismic intensities VI in JMA scale in and around Otaki area. Immediately after the earthquake, the questionnaries were distributed to the persons living in all over Nagano Prefecture. Answers to the questionnaries were returned from about 9400 persons. Seismic micro-zoning maps were constructed on the basis of these data. The maps show that the shock was especially severe in the elevated block sourrounded by the four faults-the Sakaitoge fault, the Atera fault, the Kiso-dani fault group and the Azusagawa fault group. These local vibrations recorded seismic intensities V or more in Kawasumi's scale. The intensities in the center of the Matsumoto intra-mountain basin are, on an average, about IV in Kawasumi's scale less than those in the marginal part. It is the same in the Ina intra-deep basin. In the Nagano basin, the Ueda basin and Saku districts the shocks were recorded seismic intensities III in Kawasumi's scale. Seismic intensities in the districts of the River-Sai depend strongly on the geological structure of the Neogene System.抄録全体を表示PDF形式でダウンロード (3056K) -
特に早月川岩体の高Sr含有量について田中 忍, 大坪 友英原稿種別: 本文
1987 年 41 巻 2 号 p. 101-113
発行日: 1987/03/25
公開日: 2017/06/06
ジャーナル オープンアクセスTrace elements Sr, Rb, and Ba were analyzed by X-ray fluorescence spectrometric method for 268 samples of the Funatsu granitic rocks collected from main 7 intrusions of the Hayatsukigawa, Kekachidake, Yatsuo, Funatsu, Shimonomoto, Okumayama, and Utsubo, Hida Mountains. It is worthy of note that, among the intrusions, the Hayatsukigawa intrusion is characterized by high Sr contents (250-950 ppm). The Hayatsukigawa intrusion consists mainly of fine-grained hornblende-biotite granodiorite (SiO2=66-74%) and intrudes into the Okumayama intrusion with abundant mafic Minerals (SiO2=63-68%). No systematic changes in major element contents, trace element contents and mineral compositions are observed between the two intrusions. The initial 87Sr/86Sr ratio of the Hayatsukigawa intrusion is higher than that of the Okumayama intrusion. It seems to be unreasonable to consider that the two plutons were differentiated from a magma. Trace elements in the Hayatsukigawa intrusion are clarified to be zonally distributed and the zonation can be explained mainly as the results of in situ fractional crystallization, suggesting that the assimilation hardly took place during the crystallization. Moreover, the low Rb contents (42-116 ppm) in the Hayatsukigawa intrusion also do not favor the crustal assimilation hypothesis. Therefore, high Sr contents and high initial 87Sr/86Sr ratio in the Hayatsukigawa intrusion are probably attributed to the partial melting of the source material characterized by high Sr-isotopic ratio.抄録全体を表示PDF形式でダウンロード (1258K) -
中山 勝博原稿種別: 本文
1987 年 41 巻 2 号 p. 114-130
発行日: 1987/03/25
公開日: 2017/06/06
ジャーナル オープンアクセスThe Pliocene Seto group distributed around Mt. Sanage consists of loose sediments of gravel, sand, and clay. The stratigraphy of this group has been established by tracing the volcanic ash layers. The auther recognized the volcanic ash layers at five horizons of the Seto group in the surveyged area. They are Hirohata, Tamomi, Marune, Togo, and Nagakute in ascending order. The Seto group in this area is divided into the two formations, the lower part is the Seto Porcelain Clay formation, and the upper part is the Yadagawa formation. The later is subdivided into four members by facies and intercalated volcanic ash layers; it is subdivided into the Fujioka member of gravel, the Nissin member of alternated beds of sand, silt, and clay, the Takabari member of sand, silt, and gravel, and the Idaka member of gravel, in ascending order. The total thickness attains to 180 m. The terrace deposits unconforraably overlie the Seto group. They are divided into the Miyoshi formation, the Koromo formation, the Hekikai formation, and the Koshido formation in ascending order. The Sanage-Sakaigawa faults extend from northeastward to southwestward in this area. These faults are reverse and dip 45-90 NW. On these faults, the west side of the basement of the Yadagawa formation, Togo volcanic ash layer, and the Miyoshi formation were elevated 80-150 m, 50-90 m, and 30 m respectively. The tectonic movements of these faults have been continued from the deposition of the Seto group. The Hirohata fault extends parallel to the Sanage-Sakaigawa faults. The tectonic movenents of this fault had been continued throughout of the Seto group. The region has been subjected to stress of these two faults and gradually erecting from the deposition of the Seto group leading to the fault-block hill. It is called the Sanage-Chita uplift zone.抄録全体を表示PDF形式でダウンロード (1996K) -
井尻 正二原稿種別: 本文
1987 年 41 巻 2 号 p. 131-136
発行日: 1987/03/25
公開日: 2017/06/06
ジャーナル オープンアクセスDer Begriff "Negation" hat folgende drei Bedeutungen: (1) Negation im Sinne Spinozas-Bestimmen heißt Negieren-; (2) Negation im formal-logischen Sinne seit Aristoteles (eine bloße Negation); (3) Negation als Negation der Negation im Sinne Hegels. Diese drei Arten der Negation kann man nach der Redewendung der Hegelschen Dialektik jeweils als "Negation an sich", "Negation für sich" und "Negation an und für sich" bezeichnen. In der Hegelschen Dialektik wird die Negation im zweiten Sinne als eine "leere" Negation abgelehnt, während nur die Negation der Negation als die wahre Negation geschätzt wird, die allein eine Entwicklung hervorbringt. Dagegen hat der Autor anhand der Beispiele des Absterbens der Dinosaurier und des Gedeihens der Mammalia in der Erdgeschichte festgestellt, daß auch die bloße Negation im Entwicklungs-bzw. Evolutionsprozesse eine große Rolle spielt.抄録全体を表示PDF形式でダウンロード (731K) -
許 志琴, 張 巧大, 趙 民, 梁 一鴻, 島津 光夫原稿種別: 本文
1987 年 41 巻 2 号 p. 137-148
発行日: 1987/03/25
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 (1540K)
- |<
- <
- 1
- >
- >|