Counterclockwise rotation of Northeast Japan: Paleomagnetic evidence for regional extent and timing of rotation

Otofuji, Yo–ichiro; Kambara, Ayumi; Matsuda, T.; Nohda, Susumu

doi:10.1016/0012-821x(94)90087-6

Cited by 115 publications

(84 citation statements)

References 37 publications

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“…Continued rifting of the Shikoku Basin during the Miocene led to eastward migration of the Philippine Sea plate, bringing the Izu-Bonin Arc into contact with central Honshu, with which it collided after c. 17 Ma (Sako and Hoshi, 2014). The spreading that formed the Japan Sea produced a 30°-40° anti-clockwise rotation of Northeast Japan (Hoshi and Takahashi, 1999) and clockwise rotation of Southwest Japan by ~45° to its present position at ~15 Ma, consistent with a 'double-door' model for the opening of the Japan Sea (Otofuji et al 1994). Between these two blocks of the Japanese Islands, a large basin structure (Fossa Magna) developed, which was filled by a thick sequence of Neogene sediments and volcaniclastics.…”

Section: Brief Geological History Of the Japanese Islandssupporting

confidence: 69%

Identification of prospective geosites that show features of the active continental margin in eastern Kii Peninsula, Southwest Japan

Suzuki

Takahashi

2017

Acta Geoturistica

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The eastern Kii Peninsula exhibits a variety of rock outcrops, fossils, and other geological features that illustrate the formation history of the Japanese Islands. This work aims to describe the geotourism potential of the region based on the significant rock exposures, and sets out the basis for establishing geosites in this region in the future. Geologically important sites have been selected, together with places of unique history and culture within the northern part of the eastern Kii Peninsula, including the Ise and Toba areas. The results of this study include a detailed description of the geology and history of the region, together with an evaluation of the relative value of each selected locality as a geosite. Proper development and promotion of the proposed sites would make the sites available for education and tourism, and provide opportunities for suitable development and the popularization of geological knowledge.

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Section: Brief Geological History Of the Japanese Islandssupporting

confidence: 69%

Identification of prospective geosites that show features of the active continental margin in eastern Kii Peninsula, Southwest Japan

Suzuki

Takahashi

2017

Acta Geoturistica

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“…6) (Otofuji and Matsuda, 1983;Otofuji et al, 1985;Otofuji and Matsuda, 1987). Recent paleomagnetic studies for Sikhote Alin and the Japanese Islands certify reliability of this reconstruction (Otofuji et al, 1994(Otofuji et al, , 1995. On the basis of the reconstruction, the ESVB likely continued to the San'in belt in Southwest Japan.…”

Section: An Attempt Of Reconstruction Of Far East Asia Before Openingmentioning

confidence: 75%

Fission–track Ages and Magnetic Susceptibility of Cretaceous to Paleogene Volcanic Rocks in Southeastern Sikhote Alin, Far East Russia

Matsuda¹,

Sakiyama²,

Enami

et al. 1998

Resource Geology

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Seven zircon fission-track ages and 30 magnetic susceptibilities were measured on welded pyroclastic rocks from the Bogopol and Sijanov Groups of the Cretaceous to Paleogene volcanic rocks in the southeastern part of the eastern Sikhote Alin volcano-plutonic belt, Far East Russia. The fission-track ages range from 42.7 Ma to 64.0 Ma which indicate that both the groups are of Early Paleogene time. Two thirds of the samples from the Bogopol Group have high magnetic susceptibility values, more than 3 × 10 -3 SI unit, which imply that they are of the magnetite-series, whereas the samples from the Sijanov Group show 3 × 10 -3 to 8 × 10 -5 SI unit which suggest this group of probably the ilmenite-series.The Paleogene age and high magnetic susceptibility of the Bogopol Group are quite similar to the Paleogene igneous rocks of the San'in belt, Southwest Japan. This suggests, taking accounts of the opening of the Japan Sea, that the eastern Sikhote Alin volcano-plutonic belt continued to the San'in Belt, and that the Paleogene igneous rocks along the Japan Sea coast of Northeast Japan were situated along the volcanic front of the eastern Sikhote Alin volcano-plutonic belt.

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“…Orbulina datum Blow, 1969 N.9/ N.8 Saito, 1963;, 1975 Kbi N. Otofuji et al, 1991Otofuji et al, , 1994Hoshi andYokoyama, 2001 , 2002;, 1992, 1992 2 Aramaki, S. and Hada, S. , 1965, …”

Section: Kn-1 2007a B Kbimentioning

confidence: 99%

新潟堆積盆七谷層中に見つかった中期中新世広域テフラ：Kbiテフラと紀伊半島室生火砕流堆積物の対比

Kudo¹,

Danhara²,

Iwano³

et al. 2011

Jour. Geol. Soc. Japan

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The Komadegawa-biotite (Kbi) tephra is a crystal-rich coarse tuff layer ( cm thick) intercalated in the upper part of the Middle Miocene Nanatani Formation in the eastern area of the Niigata sedimentary basin, northeast Japan. The Kbi tephra contains plagioclase (oligoclase to labradorite in composition), quartz, sanidine, biotite, trace amounts of garnet, and reddish and colorless zircons. The Kbi tephra is intercalated in the N. planktonic foraminiferal zone and the CN calcareous nannofossil zone, corresponding to an age of . -. Ma, which is consistent with a newly determined fission track age of .. Ma ( σ). On the basis of the petrography, fission track age and biostratigraphy, the Kbi tephra is correlated to the Muro Pyroclastic Flow Deposit in Kii Peninsula and the Kn-tephra in Boso Peninsula. These tephras are considered as a widespread tephra layer associated with the formation of the Kumano Acidic Rocks in Kii Peninsula. This tephra is expected to be found across large parts of Japan and provides a stratigraphic marker in various sedimentary basins.

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Counterclockwise rotation of Northeast Japan: Paleomagnetic evidence for regional extent and timing of rotation

Cited by 115 publications

References 37 publications

Identification of prospective geosites that show features of the active continental margin in eastern Kii Peninsula, Southwest Japan

Identification of prospective geosites that show features of the active continental margin in eastern Kii Peninsula, Southwest Japan

Fission–track Ages and Magnetic Susceptibility of Cretaceous to Paleogene Volcanic Rocks in Southeastern Sikhote Alin, Far East Russia

新潟堆積盆七谷層中に見つかった中期中新世広域テフラ：Kbiテフラと紀伊半島室生火砕流堆積物の対比

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