Výsledky vyhledávání - "Tomoaki Sumii"

Akademický článek

Zircon U-Pb ages of Miocene granitic rocks in the Koshikijima Islands: Implications for Neogene tectonics in the Kyushu region, southwest Japan.

Autor: Hironao Shinjoe¹ shinjoe@tku.ac.jp, Yuji Orihashi², Sota Niki³, Aki Sato², Minoru Sasaki², Tomoaki Sumii⁴, Takafumi Hirata³

Publikováno v: Island Arc. Jan-Dec2021, Vol. 30 Issue 1, p1-18. 18p.

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SHRIMP U-Pb age of SoriZ93 zircon from the Sori Granodiorite, Northeast Japan: a potential reference zircon of Late Cretaceous age

Autor: Mami Takehara, Tomoaki Sumii, Kenji Horie, Masafumi Sudo, Mayuko Fukuyama, Masatsugu Ogasawara

Publikováno v: Island Arc. 22:306-317

SoriZ93 zircon was separated from residual mineral fraction after the preparation of the SORI93 biotite standard from the Sori Granodiorite in the Ashio Mountains, Northeast Japan, and analyzed for its U–Pb age using a sensitive high resolution ion

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7c75b7ec714cdd75e31477795e65454d
https://doi.org/10.1111/iar.12041

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U-Pb zircon ages of syenitic and granitic rocks in the Ashizuri igneous complex, southwestern Shikoku: Constraint for the origin of forearc alkaline magmatism

Autor: Tomoaki Sumii, Yuji Orihashi, Hironao Shinjoe

Publikováno v: GEOCHEMICAL JOURNAL. 44:275-283

1989). The results range from 10 to 16Ma, which suggest that the igneous activities of theAshizuri complex were generally coeval with those of theOuter Zone Granitic Rocks. Relatively large scatter in thereported age, however, obscures the strict tem

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8cccceb0caaa1693c14a1003712b2ff5
https://doi.org/10.2343/geochemj.1.0070

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Chemical composition of whole-rocks samples and volcanic glasses of the Miocene Tamateyama and Sekibutsu Tuffs in the area surrounding the Nara Basin

Autor: Hironao Shinjoe, Hideki Iwano, Tomoaki Sumii, Tohru Danhara, Yutaka Wada, Yuji Orihashi

Publikováno v: The Journal of the Geological Society of Japan. 116:447-452

We used XRF and INAA methods to analyze the chemical composition of whole-rock and volcanic glass samples from the Tamateyama and Sekibutsu Tuffs in the area surrounding the Nara Basin. Both tuffs have rhyolitic compositions with SiO2=73.6-75.0 wt.%,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::52ee89b8d151beb3724c09bb61a208ac
https://doi.org/10.5575/geosoc.116.447

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Regional variation of whole rock chemistry of the Miocene felsic igneous rocks in the Kii Peninsula, southwest Japan

Autor: Yutaka Wada, Hironao Shinjoe, Shun'ichi Nakai, Yuji Orihashi, Tomoaki Sumii

Publikováno v: The Journal of the Geological Society of Japan. 113:310-325

紀伊半島の中新世珪長質火成岩について全岩主成分，微量元素組成を報告し，その広域的特徴について検討した．その結果，外帯花崗岩質岩には重希土類元素の枯渇が見られず瀬戸内火�

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::dd7060d36d238e47d27ba3e9830032aa
https://doi.org/10.5575/geosoc.113.310

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Correlation of the Muro Pyroclastic Flow Deposit and the adjacent tuffs in northern Kii Peninsula, southwest Japan, and their source: an approach from mode analysis using refractive index of light minerals

Autor: Tohru Yamashita, Hideki Iwano, Hiroyuki Hoshi, Hironao Shinjoe, Tomoaki Sumii, Tohru Danhara, Yutaka Wada, Yuu Kawakami

Publikováno v: The Journal of the Geological Society of Japan. 113:340-352

紀伊半島北部に分布する室生火砕流堆積物とその周辺の凝灰岩（石仏凝灰岩，古寺凝灰岩，玉手山凝灰岩）および外帯中新世珪長質岩類について，屈折率を用いた軽鉱物組合せモード分�

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bd0aafa86793fa245a662477df41fd6c
https://doi.org/10.5575/geosoc.113.340

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Magnesian igneous enclave in the Ohmine Granitic Rocks of Kii Peninsula

Autor: Gen Shimoda, Tomoaki Sumii, Hironao Shinjoe, Takaaki Fukuoka

Publikováno v: Japanese Magazine of Mineralogical and Petrological Sciences. 34:15-23

Magnesian igneous enclaves showing sub-angular shape and up to 2 m in the maximum dimension were found from granodiorite in the Dorogawa pluton, the northernmost pluton of the Ohmine granitic rocks in Kii peninsula, southwest Japan. Igneous enclaves

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0bb6f085d2b4c8eb1014b9349a58358e
https://doi.org/10.2465/gkk.34.15

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K-Ar ages of the Ohmine Granitic Rocks, south-west Japan

Autor: Tomoaki Sumii, Hironao Shinjoe

Publikováno v: Island Arc. 12:335-347

The Ohmine Granitic Rocks are a series of granitic rocks that are distributed in a chain stretching along the central axis of the Kii Peninsula. Their precise ages have not been determined, although precise ages have been reported for other geologica

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::116635e2ab53c761ae99dde140e66601
https://doi.org/10.1046/j.1440-1738.2003.00401.x

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