Výsledky vyhledávání - "Atusi Ninomiya"

Spatial variations in 3He/4He ratios along a high strain rate zone, central Japan

Autor: Tomohiro Kusano, Atusi Ninomiya, Junichi Nakajima, Koji Umeda, Koichi Asamori

Publikováno v: Journal of Asian Earth Sciences. 73:95-102

A linear zone with high strain rates along the Japan Sea coast, the Niigata-Kobe Tectonic Zone (NKTZ), is considered to be associated with rheological heterogeneities in the lower crust and/or upper mantle. Helium isotope variations along the NKTZ re

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::585e46037a3cfc8035929f1f2da97191
https://doi.org/10.1016/j.jseaes.2013.04.016

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K-Ar age of high magnesium andesite dikes at the Toki River in Gifu Prefecture, central Japan

Autor: Hidehisa Mashima, Atsushi Tanase, Koji Umeda, Atusi Ninomiya, Teruki Oikawa

Publikováno v: The Journal of the Geological Society of Japan. 112:616-619

A high-magnesium andesite dike swarm intruding into the Jurassic melange of the Mino-Tamba Belt and the Cretaceous Toki Granite is exposed along the Toki River in central Japan. At the time of intrusion, the direction of the maximum horizontal compre

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2b3a72500cda3f6b7623deaf4f0dd324
https://doi.org/10.5575/geosoc.112.616

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Long-term changes in distribution and chemistry of middle Miocene to Quaternary volcanism in the Chokai-Kurikoma area across the Northeast Japan Arc

Autor: Atusi Ninomiya, Hirofumi Kondo, Kazuhiro Tanaka, Yukihiro Mizuochi

Publikováno v: The Island Arc. 13:18-46

To understand the characteristics of long-term spatial and temporal variation in volcanism within a volcanic arc undergoing constant subduction since the cessation of back-arc opening, a detailed investigation of middle Miocene to Quaternary volcanis

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d2328d1fb6bad013debbb3f2ee51789d
https://doi.org/10.1111/j.1440-1738.2003.00417.x

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Late Cenozoic volcanic activity in the Chugoku area, southwest Japan arc during back-arc basin opening and reinitiation of subduction

Autor: Takashi Kusano, Takashi Nagao, Shintaro Hayashi, Susumu Kakubuchi, Ryuhei Okada, Jun-Ichi Kimura, Norie Fujibayashi, Atsushi Tanase, Koji Umeda, Tomoyuki Kunikiyo, Shomei Okada, Isaku Osaka, Hisashi Murakami, Tsuneari Ishimaru, Atusi Ninomiya, Seiki Yamauchi

Publikováno v: The Island Arc. 12:22-45

Temporal–spatial variations in Late Cenozoic volcanic activity in the Chugoku area, southwest Japan, have been examined based on 108 newly obtained K–Ar ages. Lava samples were collected from eight Quaternary volcanic provinces (Daisen, Hiruzen,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::92dad66ea60924d9fba3b1741066e1ac
https://doi.org/10.1046/j.1440-1738.2003.00377.x

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Helium isotopes as a tool for detecting concealed active faults

Autor: Atusi Ninomiya, Koji Umeda

Publikováno v: Geochemistry, Geophysics, Geosystems. 10

[1] A magnitude (Mj) 7.3 crustal earthquake occurred in the western Tottori area, southwest Japan, on 6 October 2000. However, there was no obvious prefaulting indication at surface of a fault corresponding to the western Tottori earthquake in 2000.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0a93298b8bb5ef2008cac9f2f8269ccd
https://doi.org/10.1029/2009gc002501

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Heat source for an amagmatic hydrothermal system, Noto Peninsula, Central Japan

Autor: Tateyuki Negi, Atusi Ninomiya, Koji Umeda

Publikováno v: Journal of Geophysical Research: Solid Earth. 114

[1] Although there is no evidence of volcanism in the Noto Peninsula since the late Miocene, the peninsula has long been known to be unusual and atypical of non-volcanic regions, as indicated by high-temperature hot springs and a geothermal gradient

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e6a3c9b4c6bb559ebfeb895c4ecf926a
https://doi.org/10.1029/2008jb005812

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High3He emanations from the source regions of recent large earthquakes, central Japan

Autor: Glen F. McCrank, Atusi Ninomiya, Koji Umeda

Publikováno v: Geochemistry, Geophysics, Geosystems. 9

[1] Recently, two shallow MW 6.6 inland earthquakes, the 2004 mid-Niigata prefecture earthquake and the 2007 Niigataken Chuetsu-oki earthquake, occurred in the Niigata sedimentary basin near the boundary between the Eurasian and the North American Pl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::466a419484215d89858a5046b661ce54
https://doi.org/10.1029/2008gc002272

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Helium isotopes as geochemical indicators of a serpentinized fore-arc mantle wedge

Autor: Atusi Ninomiya, Glen F. McCrank, Koji Umeda

Publikováno v: Journal of Geophysical Research. 112

New helium isotope data from hot springs on eastern Kyushu Island were obtained in order to elucidate the geographic distribution of 3 He/ 4 He ratios in the fore-arc regions of southwest Japan. Systematic, regional variations in 3 He/ 4 He ratios ar

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6e017a423d7ce6c6c325cbabc7913f88
https://doi.org/10.1029/2007jb005031

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