Earth Science (Chikyu Kagaku)

Earth Science (Chikyu Kagaku)

Online ISSN : 2189-7212
Print ISSN : 0366-6611

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Volume 1957, Issue 32

Displaying 1-16 of 16 articles from this issue

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Scope of the Recent Researches(A SYMPOSIUM ON THE BASEMENT OF THE JAPANESE ISLANDS)

[in Japanese]

Article type: Article
1957 Volume 1957 Issue 32 Pages 1-3
Published: March 28, 1957
Released on J-STAGE: July 24, 2017

DOIhttps://doi.org/10.15080/agcjchikyukagaku.1957.32_1

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The Chichibu System, the Palaeozoic formations in Japan, is the chief and fundamental constituent of the Japanese Islands, being a thick series of geosynclinal deposits. The main part of the System is of Permian and Upper Carboniferous, and pre-Upper Carboniferous rocks are extremely rare. The oldest formations are of Silurian, and are known from several places in 3 provinces, i.e. 1) the South ern-Kitakami Mountainland, 2) the Hida Mountainland, and 3) the Chichibu Terrain of Southwestern-Japan (numerals 1〜13 in the figure on page 2). However, they always occur as small patches or blocks, and their relations to the basement rocks are unknown, except the case of Naradani area, where some geologists insist on an unconformable relation to the Hida Metamorphic Rocks. The Palaeozoic rocks, in some parts, have been changed into gneisses or crystalline schists, and they make the backbone of the Islands. There are, however, certain rocks which are expected by some geologists to be of pre-Silurian, but are regarded by others as merely metamorphic equivalents of the Chichibu System. Among them, the Hida Metamorphic Rocks occur in the Hida Mountainland as several isolated masses (in black in the figure) rather extensively, and the area is encircled by a tectonic line, called the Hida Zone, in which the fossiliferous Silurian rocks of this province are intermingled. The Terano Metamorphic Rocks, another one of them, occur in the Kurosegawa Zone, also an important tectonic line in Southwestern Japan, together with the Silurian rocks of this province. Here, the two kinds of rocks are found somewhat like xenoliths in or at the margin of small, lenticular granite masses. In both provinces, the differrence in grade of metamorphism between the metamorphic rocks and the Silurian is remarkable. The Editorial Committee of the present Journal asked some fifteen geologists and geophysicists, how they think of the basement of the Chichibu System. Certain special requirements were added, at the same time, for each person, according to his speciality in the field of study. Thus the Committee had eleven answers, which were reproduced on the preceding pages. The authors and the titles of these papers are as the following.

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Stratigraphic Considerations of the Hida Metamorphic Rocks(Opinions, Viewpoints and Materials,A SYMPOSIUM ON THE BASEMENT OF THE JAPANESE ISLANDS)

Haruyoshi FUJIMOTO

Article type: Article
1957 Volume 1957 Issue 32 Pages 4-7
Published: March 28, 1957
Released on J-STAGE: July 24, 2017

DOIhttps://doi.org/10.15080/agcjchikyukagaku.1957.32_4

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Silurian in the Hida Mountainland and the Problem of its Basement(Opinions, Viewpoints and Materials,A SYMPOSIUM ON THE BASEMENT OF THE JAPANESE ISLANDS)

Tadao KAMEI

Article type: Article
1957 Volume 1957 Issue 32 Pages 8-
Published: March 28, 1957
Released on J-STAGE: July 24, 2017

DOIhttps://doi.org/10.15080/agcjchikyukagaku.1957.32_8

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On the Age of the Graphite-bearing Parts of the Hida Metamorphic Rocks(Opinions, Viewpoints and Materials,A SYMPOSIUM ON THE BASEMENT OF THE JAPANESE ISLANDS)

Nobuo KOBATAKE

Article type: Article
1957 Volume 1957 Issue 32 Pages 9-10
Published: March 28, 1957
Released on J-STAGE: July 24, 2017

DOIhttps://doi.org/10.15080/agcjchikyukagaku.1957.32_9

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On the Basement Rocks of the Kitakami- and the OuｰMountainlands(Opinions, Viewpoints and Materials,A SYMPOSIUM ON THE BASEMENT OF THE JAPANESE ISLANDS)

Yoshio ONUKI

Article type: Article
1957 Volume 1957 Issue 32 Pages 11-12
Published: March 28, 1957
Released on J-STAGE: July 24, 2017

DOIhttps://doi.org/10.15080/agcjchikyukagaku.1957.32_11

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The Gotlandian Formation in the Kuraoka District, Miyazaki Prefecture(Opinions, Viewpoints and Materials,A SYMPOSIUM ON THE BASEMENT OF THE JAPANESE ISLANDS)

Masaji SAITO, Nobukazu KAMBE

Article type: Article
1957 Volume 1957 Issue 32 Pages 13-14
Published: March 28, 1957
Released on J-STAGE: July 24, 2017

DOIhttps://doi.org/10.15080/agcjchikyukagaku.1957.32_13

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Research on the Basement Rocks of the Japanese Islands in the Kurosegawa Zone(Opinions, Viewpoints and Materials,A SYMPOSIUM ON THE BASEMENT OF THE JAPANESE ISLANDS)

Noboru YAMASHITA

Article type: Article
1957 Volume 1957 Issue 32 Pages 15-
Published: March 28, 1957
Released on J-STAGE: July 24, 2017

DOIhttps://doi.org/10.15080/agcjchikyukagaku.1957.32_15

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Researches on the Basement of the Japanese Islands(Opinions, Viewpoints and Materials,A SYMPOSIUM ON THE BASEMENT OF THE JAPANESE ISLANDS)

Toru TOMITA

Article type: Article
1957 Volume 1957 Issue 32 Pages 16-17
Published: March 28, 1957
Released on J-STAGE: July 24, 2017

DOIhttps://doi.org/10.15080/agcjchikyukagaku.1957.32_16

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The Problems of the Basement of the Japanese Islands, and Some Xenoliths contained in Volcanic Rocks(Opinions, Viewpoints and Materials,A SYMPOSIUM ON THE BASEMENT OF THE JAPANESE ISLANDS)

A Historical Review of Research

Ryohei MORIMOTO

Article type: Article
1957 Volume 1957 Issue 32 Pages 18-19
Published: March 28, 1957
Released on J-STAGE: July 24, 2017

DOIhttps://doi.org/10.15080/agcjchikyukagaku.1957.32_18

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The Acid Volcanism in Gotlandian, and the Problems of the Basement of the Japanese Islands(Opinions, Viewpoints and Materials,A SYMPOSIUM ON THE BASEMENT OF THE JAPANESE ISLANDS)

Masao GORAI

Article type: Article
1957 Volume 1957 Issue 32 Pages 19-20
Published: March 28, 1957
Released on J-STAGE: July 24, 2017

DOIhttps://doi.org/10.15080/agcjchikyukagaku.1957.32_19

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A Presentation from the Seismologic Standpoint(Opinions, Viewpoints and Materials,A SYMPOSIUM ON THE BASEMENT OF THE JAPANESE ISLANDS)

On the Structure of the Shallower Earth's Crust of Japan

Ituo TAMAKI

Article type: Article
1957 Volume 1957 Issue 32 Pages 21-22
Published: March 28, 1957
Released on J-STAGE: July 24, 2017

DOIhttps://doi.org/10.15080/agcjchikyukagaku.1957.32_21

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On the Age Measurement of the Granites by Radio-active Minerals(Opinions, Viewpoints and Materials,A SYMPOSIUM ON THE BASEMENT OF THE JAPANESE ISLANDS)

Ichikazu HAYASE

Article type: Article
1957 Volume 1957 Issue 32 Pages 23-
Published: March 28, 1957
Released on J-STAGE: July 24, 2017

DOIhttps://doi.org/10.15080/agcjchikyukagaku.1957.32_23

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[title in Japanese]

Article type: Appendix
1957 Volume 1957 Issue 32 Pages 24-25
Published: March 28, 1957
Released on J-STAGE: July 24, 2017

DOIhttps://doi.org/10.15080/agcjchikyukagaku.1957.32_24

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[title in Japanese]

Article type: Bibliography
1957 Volume 1957 Issue 32 Pages 26-
Published: March 28, 1957
Released on J-STAGE: July 24, 2017

DOIhttps://doi.org/10.15080/agcjchikyukagaku.1957.32_26

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Characters of Natural Science and Idealism-2

Shoji IJIRI

Article type: Article
1957 Volume 1957 Issue 32 Pages 27-30
Published: March 28, 1957
Released on J-STAGE: July 24, 2017

DOIhttps://doi.org/10.15080/agcjchikyukagaku.1957.32_27

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Rocks of Mikura-shima

Yoshimasu KURODA, Hajime KOMATSU

Article type: Article
1957 Volume 1957 Issue 32 Pages 37-38
Published: March 28, 1957
Released on J-STAGE: July 24, 2017

DOIhttps://doi.org/10.15080/agcjchikyukagaku.1957.32_37

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