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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 3
Displaying 1-10 of 10 articles from this issue
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Ikuo SuzukiArticle type: Article
1989 Volume 43 Issue 3 Pages ii-iii
Published: May 25, 1989
Released on J-STAGE: June 06, 2017
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Mesozoic of the Miyoshino district in Nara PrefectureYamato Omine Research GroupArticle type: Article
1989 Volume 43 Issue 3 Pages 119-128
Published: May 25, 1989
Released on J-STAGE: June 06, 2017
JOURNAL OPEN ACCESSLithologic characters and radiolarian fossil evidence suggest that the Miyoshino district is occupied by Cretaceous strata belonging to the Shimanto Belt, except for the B Formation (Chichibu Belt) which is distributed in the uppermost part of tectonic piles as a nappe. The formations (tentatively nominated) in this district and their ages are as follows. Akataki Formation; Turonian〜 Takahara Formation; Jurassic-Cretaceous Makio Formation; Coniacian-Santonian〜 Miyoshino Formation; Late Albian-Cenomanian〜 Heibara Formation; Jurassic-Cretaceous The strata of the Shimanto Belt are widely distributed in the central area of the Kii Mountains including the study district. It is possible that the Shimanto Belt is in fault contact with the Sambagawa Belt, lacking the Chichibu Belt.View full abstractDownload PDF (1607K) -
Masayuki Tashiro, Takeshi KozaiArticle type: Article
1989 Volume 43 Issue 3 Pages 129-139
Published: May 25, 1989
Released on J-STAGE: June 06, 2017
JOURNAL OPEN ACCESSIn Northeast Japan, the Lower Cretaceous strata, i. e., the Ofunato, Oshima and Miyako Groups and several strata which were correlated with the groups, are distributed sporadically in Kitakami and Abukuma Mountains. The Ofunato Group is undoubtedly correlated with the Monobegawa Group which is distributed at the northern Chichibu Belt in southwest Japan, because of the nearly same bivalve fauna and close resemblance of rock facies between them. This probably ranged the Monobegawa Group as a same Lower Cretaceous sedimental basin. The Oshima Group and the uppermost part of the Soma Group are also certainly correlated with the uppermost part of the Torinosu Group and basal part of the Nankai Group which were sporadically croping out at the Middle Chichibu Belt (Kurosegawa Tectonic Belt) in southwest Japan, by their very similar faunas and litho-facies. The Miyako Group is akin to the Yatsushiro and Kesado Formations of the Pre-Sotoizumi Group at Central Kyusyu and the upper part of the Nankai Group, e. g., the Ikuna Formation of Tokushima in Shikoku or the Ochiai Formation of Oita in Kyusyu, in the occurrence of many common species of bivalves. The faunal evidence is shown the relationship among Miyako, Oshima and Soma Groups. And in Early Cretaceous, the basin of the groups was probably located at lower paleogeographical latitude than that of the Ofunato Group. Some bivalve species from the Miyako Group are probably concerned with those from the Middle Yezo Group and the Goshonoura Group of the Upper Cretaceous of Japan as the species on same lineages or the derivatives from the former. The Upper Cretaceous System of northeast Japan are distributed at southern Pacific coast of Fukushima and Ibaraki Prefectures, and northern Pacific coast and Kitakami Mountains of Iwate Prefecture. The Kuji and Futaba Groups, and the several strata which were able to correlate with the groups, are known. They are composed of the shallow shelf sediments which were overflowed the Pre-Cretaceous basements by the Urakawan Transgression.View full abstractDownload PDF (1663K) -
Masahiro Shiba, Koichi Suzuki, Suruga Bay Collaborative Research GroupArticle type: Article
1989 Volume 43 Issue 3 Pages 140-156
Published: May 25, 1989
Released on J-STAGE: June 06, 2017
JOURNAL OPEN ACCESSThe Miocene Shizuoka Group is distributed in the southwestern Fuji River Valley which lies in the South Fossa-Magna, Central Japan. In this paper, the stratigraphy and geological structure of the Shizuoka Group in the northern part of Shizuoka and Shimizu City are described, and the formation mechanism of folding of the Shizuoka Group is discussed. The Shizuoka Group is divided into the Ohira and the Takayama Formations in ascending-order. The Ohira Formation attains more than 2,700m in thickness and can be subdivided into six members: the Nishizato sandstone Member, the Kouchi sandstone and mudstone Member, the Hohnokubo mudstone Member, the Ishizawagawa sandstone Member, the Jishyabatake mudstone Member, the Kaifushi sandstone Member, in ascending order. The Takayama Formation attains more than 5,200m in thickness and can be subdivided into six members: the Isabu sandstone and mudstone Member, the Yoshihara sandstone Member, the Kitadaki sandstone and mudstone Member, the Kashio sandstone Member, the Nagao sandstone and mudstone Member, the Hozumi mudstone Member, in ascending order. Although the Ohira Formation is in contact with the Takayama Formation by fault, the Kaifushi sandstone Member of the Ohira Formation is possible to correlate with the Kitadaki sandstone and mudstone Member of the Takayama Formation because of their similar lithology. The planktonic foraminiferal assemblege indicates that the geological age of the Shizuoka Group is assigned to the early Late Miocene (N16-17A of Blow's Number). This Group is correlated with the Minobu Formation of the Fujikawa Group in the northern Fuji River Valley. The geological structure of the Shizuoka Group is characterized by the N-S to NE-SW and E-W trending folds. The significant characteristics of these structures are that the eastern and southern wings of the anticlines are steeper than the western and northern ones, and that the thickness of a member on one wing of the anticline differs from that on the other wing. These facts suggest that the folds are developed due to the differential movement of the basement blocks during the depositional stage of the Shizuoka Group.View full abstractDownload PDF (2793K) -
Sedimentary and tectonic environmentToshio Kawamura, Makoto KawamuraArticle type: Article
1989 Volume 43 Issue 3 Pages 157-167
Published: May 25, 1989
Released on J-STAGE: June 06, 2017
JOURNAL OPEN ACCESSThe Carboniferous tectonic and sedimentary conditions of the South Kitakami Terrane are discussed on the basis of the petrochemistry of the volcanic rocks and carbonate sedimentology. The Carboniferous deposits of the terrane can be grouped into lower and upper facies from the lithological viewpoint. The lower facies is represented by siliciclastic rocks including an amount of volcanic rocks, while the upper is characterized by the dominance of carbonates. The volcanic rocks of the lower facies are composed of acid tuff, basaltic volcaniclastics and lava. Petrochemically, the basaltic rocks are totally subalkaline and include high-TiO2 tholeiites. The volcanic rocks apparently show the bimodal nature on SiO2 contents. The Early Carboniferous volcanism took place presumably in a volcanic arc to back-arc region. The carbonate rocks of the upper facies are classified into seventeen lithofacies types. They are grouped into five lithofacies assemblages, each of which individually reflects a depositional facies. The vertical and lateral distributions of these assemblages show a evolution of the sedimentary body from ramp type to rimmed-shelf type. During the Carboniferous time, the South Kitakami Terrane was situated in an active margin. The bimodal volcanism associated with differentiated basins apparent in the lower facies suggests a somewhat tentional tectonism in a volcanic arc to back-arc region during Tournaisian to Middle-Late Visean. The formation of carbonates at the Late Visean was initiated by the declining of the volcanism and global sea-level rise. Gradual subsidence of the basement led to the development of vast carbonate shelf with slope facies during Namurian to Early Westphalian.View full abstractDownload PDF (1353K) -
Ojiya Crustal Movement Research GroupArticle type: Article
1989 Volume 43 Issue 3 Pages 168-171
Published: May 25, 1989
Released on J-STAGE: June 06, 2017
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Masashi Takahashi, Akira OnoArticle type: Article
1989 Volume 43 Issue 3 Pages 172-175
Published: May 25, 1989
Released on J-STAGE: June 06, 2017
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Hisatada Akahane, Michiharu Goto, Shigeru YamamotoArticle type: Article
1989 Volume 43 Issue 3 Pages 176-179
Published: May 25, 1989
Released on J-STAGE: June 06, 2017
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Shinichi Tamura, Yutaka Kobayashi, Kenji ShutoArticle type: Article
1989 Volume 43 Issue 3 Pages 180-185
Published: May 25, 1989
Released on J-STAGE: June 06, 2017
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14C age of the Quarternary deposits in Japan (171)Yaeko Igarashi, Osamu Yamada, Katsuhide MatsushitaArticle type: Article
1989 Volume 43 Issue 3 Pages 186-188
Published: May 25, 1989
Released on J-STAGE: June 06, 2017
JOURNAL OPEN ACCESSDownload PDF (318K)
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