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Volume 43 (1989)
- Issue 6 Pages 353-
- Issue 5 Pages 261-
- Issue 4 Pages 189-
- Issue 3 Pages 119-
- Issue 2 Pages 69-
- Issue 1 Pages 1-
Volume 43, Issue 2
Displaying 1-8 of 8 articles from this issue
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Shigeyuki WakabayashiArticle type: Article
1989 Volume 43 Issue 2 Pages ii-iii
Published: March 25, 1989
Released on J-STAGE: June 06, 2017
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Toshio KutsukakeArticle type: Article
1989 Volume 43 Issue 2 Pages 69-74
Published: March 25, 1989
Released on J-STAGE: June 06, 2017
JOURNAL OPEN ACCESSThe Ryoke plutonism took place at the eastern margin of the Eurasian Continent in Cretaceous, before the opening of the Japan Sea. It belongs to the Cretaceous to Paleogene felsic magmatism, extensively occurred in the Inner Zone of the Southwest Japan, which constitutes a segment of the long magmatic belt ranging from Sikhote-Alin, through the southeastern Korea to Fujian, China. The older Ryoke granitic rocks represent a magmatic arc, related to the subduction of the oceanic plate underneath the Eurasian plate in that time. The younger and post-Ryoke granites, however, are not typical volcanic arc magmatism.View full abstractDownload PDF (696K) -
Toshio Kusunoki, Makoto MusashinoArticle type: Article
1989 Volume 43 Issue 2 Pages 75-83
Published: March 25, 1989
Released on J-STAGE: June 06, 2017
JOURNAL OPEN ACCESSThe Tamba belt in the Inner Zone of Southwest Japan consists of two distinctive tectono-stratigraphic units, the Type I (Late Jurassic) and Type II (Late Triassic〜Middle Jurassic) suites. The latter is divided into three subunits, TIIa, TIIb and TIIc, according to differences of their age and lithology. These suites and subunits have a sort of upward-coarsening sequence of accretionary prism. Sandstone sequence of the Type I suite is composed of rather distal turbidites. On the contrary, that of the Type II suite exhibits more proximal feature. Petrography of sandstone in each suite and subunit was examined. Sandstone of the Type I suite is more quartzose than that of the Type II suite, and is assumed to be derived from a continental source area widely occupied by basement rocks. The sandstone composition of the Type II suite gradually change from lithic (TIIc) to feld-spathic (TIIa) as the age of deposition becomes younger. This alteration is due to the geologic change of the source area by some reason, for example, erosion.View full abstractDownload PDF (1991K) -
Summay of the stratigraphyToshio Kawamura, Makoto KawamuraArticle type: Article
1989 Volume 43 Issue 2 Pages 84-97
Published: March 25, 1989
Released on J-STAGE: June 06, 2017
JOURNAL OPEN ACCESSStratigraphy of the Carboniferous System in the South Kitakami Terrane is systematically described and synthesized. The Carboniferous deposits are distributed in the South Kitakami Terrane and "Hayachine Tectonic Belt". They are well and successively exposed in the following ten districts: Takozu, Yonesato, Ohasama, Tassobe, Omata, Setamai, Hikoroichi, Kamiarisu, Omatsu and Kogawa. Seventeen formations in the ten districts are established on the Carboniferous System. It unconformably (or locally conformably) overlies the Devonian, and is widely unconformably overlain by the Permian with the Late Carboniferous hiatus. Lithologically, the Carboniferous deposits can be grouped into lower and upper facies. The former, ranging from Tournaisian to Middle-Late Visean in age, is represented by siliciclastic rocks including an amount of volcanic rocks. It is widely variable on thickness and lithology from district to district. While, the upper facies, ranging from Late Visean to Early Namurian in age, is characterized by dominance of limestone in every district. It is assumed that the sedimentary basins of the lower facies were differentiated. Subsequently entire basins were homoginized to a carbonate depositional environment.View full abstractDownload PDF (1728K) -
Katsuhiro Nakayama, Tetsunobu NakaneArticle type: Article
1989 Volume 43 Issue 2 Pages 98-101
Published: March 25, 1989
Released on J-STAGE: June 06, 2017
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Keiichi Takahashi, Masahiro Nomura, Iwao KobayashiArticle type: Article
1989 Volume 43 Issue 2 Pages 102-105
Published: March 25, 1989
Released on J-STAGE: June 06, 2017
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Atsutoshi Nakayama, Tatsuya Ishigaki, Jiro Ishii, Tetsuyoshi YamazakiArticle type: Article
1989 Volume 43 Issue 2 Pages 106-111
Published: March 25, 1989
Released on J-STAGE: June 06, 2017
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Tokuhiko KameyamaArticle type: Article
1989 Volume 43 Issue 2 Pages 112-115
Published: March 25, 1989
Released on J-STAGE: June 06, 2017
JOURNAL OPEN ACCESSDownload PDF (491K)
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