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駿河トラフ収束境界域の第四紀地史についての新知見 : 収束境界火山群とその年代について
https://doi.org/10.14945/00000357
https://doi.org/10.14945/00000357c522d053-4e0b-4185-a9a5-84e6fbe43fb1
名前 / ファイル | ライセンス | アクション |
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KJ00000102439.pdf (2.6 MB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||||
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公開日 | 2008-01-25 | |||||||
タイトル | ||||||||
タイトル | 駿河トラフ収束境界域の第四紀地史についての新知見 : 収束境界火山群とその年代について | |||||||
言語 | ||||||||
言語 | jpn | |||||||
キーワード | ||||||||
主題Scheme | Other | |||||||
主題 | volcanic activity | |||||||
キーワード | ||||||||
主題Scheme | Other | |||||||
主題 | convergent plate boundary | |||||||
キーワード | ||||||||
主題Scheme | Other | |||||||
主題 | Suruga Trough | |||||||
キーワード | ||||||||
主題Scheme | Other | |||||||
主題 | Iwabuchi pyroclatic rocks | |||||||
キーワード | ||||||||
主題Scheme | Other | |||||||
主題 | Quaternarygeological history | |||||||
キーワード | ||||||||
主題Scheme | Other | |||||||
主題 | Fossa-Magna | |||||||
キーワード | ||||||||
主題Scheme | Other | |||||||
主題 | accretion | |||||||
資源タイプ | ||||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||
資源タイプ | departmental bulletin paper | |||||||
ID登録 | ||||||||
ID登録 | 10.14945/00000357 | |||||||
ID登録タイプ | JaLC | |||||||
タイトル(別言語) | ||||||||
その他のタイトル | Quaternary volcanic activity chain active circa 0.7〜0.92Ma at a convergent plate boundary of Suruga Trough | |||||||
著者 |
大塚, 謙一
× 大塚, 謙一
WEKO
162
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書誌情報 |
静岡大学地球科学研究報告 巻 26, p. 17-27, 発行日 1999-07 |
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出版者 | ||||||||
出版者 | 静岡大学地球科学教室 | |||||||
NDC | ||||||||
主題Scheme | NDC | |||||||
主題 | 452 | |||||||
抄録 | ||||||||
内容記述タイプ | Abstract | |||||||
内容記述 | Volcanic rocks were found at Eurasian side slope of Suruga Trough convergent plate boundary by dive 708 of the "Shinkai 2000". These volcanic rocks crop out at the eastern lower slope of the Senoumi North Bank at a water depth of 1,500 m. Two types of phyric andesite rocks, hypersthene-augite-andesite and hornblende-augite-andesite, were noticed, both containing distinctly large phenocrysts. These volcanic rocks overlie the conglomerate layers that date from 0.91 to 0.82 Ma within nanno fossil biostratigraphic horizon CN 14 a, so the age of igneous activity may be a little yonger than the nanno fossil age. The volcanic rocks have strong similarities with regard to the rock types, geological situation, and stratigraphic relations to the rocks of the "Iwabuchi pyroclastic rocks and Iwabuchi volcanoes group". These rocks cover Kambara Conglomerates at Kambara Hills 45 km to the north of this site. Nanno fossil age obtained from a muddy layer intercalated in "Iwabuchi pyroclastic rocks" is 0.92-0.46Ma, and the "Iwabuchi pyroclastic rocks" indicate paleomagnetic reversed polarity. So the volcanoes in the Suruga Trough area would be active in the later part of the Matuyama reversed magnetic polarity chronozone and also be younger than the Jaramillo sub chronozone of 0.92 Ma. The rock samples of hornblende-augite-andesite are conspicuously reddish-purple due to hematite micro crystals scattered through the groundmass and also replacing the phenocrysts, and hornblende phenocrysts are severely opacitized oxyhornblende. These facts suggest that the volcanic activity happened under an oxidizing environment, so the eruption might be aerial or in very shallow sea. The tectonic situation and geological environment would be very different from the persent, and more than one thousand and several hundred meters depression has occurred since then. Further research about convergent boundary volcanic activity is necessary not only for local geological interest but also for solving fundamentally important problems of tectonic history of the whole Suruga-Nankai Trough region and tectono-magmatic phenomena. | |||||||
ISSN | ||||||||
収録物識別子タイプ | ISSN | |||||||
収録物識別子 | 03886298 | |||||||
NII論文ID | ||||||||
関連タイプ | isIdenticalTo | |||||||
識別子タイプ | NAID | |||||||
関連識別子 | 110000413387 | |||||||
NII書誌ID | ||||||||
収録物識別子タイプ | NCID | |||||||
収録物識別子 | AN00103190 | |||||||
フォーマット | ||||||||
内容記述タイプ | Other | |||||||
内容記述 | application/pdf | |||||||
著者版フラグ | ||||||||
出版タイプ | VoR | |||||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 |