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紀伊半島四万十累層群の上部白亜系竜神累層に挟まれる酸性凝灰岩のフィッション・トラック年代とその意義
http://hdl.handle.net/10091/12082
http://hdl.handle.net/10091/1208266dc3032-f187-4530-9048-26b7cfa3b453
名前 / ファイル | ライセンス | アクション |
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chishitsu_102_2-1.pdf (1.9 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2011-03-28 | |||||
タイトル | ||||||
言語 | ja | |||||
タイトル | 紀伊半島四万十累層群の上部白亜系竜神累層に挟まれる酸性凝灰岩のフィッション・トラック年代とその意義 | |||||
言語 | ||||||
言語 | jpn | |||||
キーワード | ||||||
主題 | fission-track, dating, zircon, Maastrichtian, Shimanto Belt, Ryujin Formation, acidic tuff, Nohi Ryolite | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
その他(別言語等)のタイトル | ||||||
その他のタイトル | Fission-track ages and their significance of acidic tuff in the Upper Cretaceous Ryujin Formation of the Shimanto Supergroup, Kii Peninsula, Southwest Japan | |||||
著者 |
木村, 克己
× 木村, 克己× 別所, 孝範× 坂本, 隆彦× 公文, 富士夫× 鈴木, 博之 |
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信州大学研究者総覧へのリンク | ||||||
氏名 | 公文, 富士夫 | |||||
URL | http://soar-rd.shinshu-u.ac.jp/profile/ja.ZUchOUkh.html | |||||
出版者 | ||||||
出版者 | 日本地質学会 | |||||
引用 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 地質学雑誌. 102(2):116-124 (1996) | |||||
書誌情報 |
地質学雑誌 巻 102, 号 2, p. 116-124, 発行日 1996-02-15 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Fission-track ages of zircon were determined with the grain-by-grain external detector (ED1) method for two samples of coarse acidic tuff (CH-1 and CH-2), which were collected from the Chibiki-yama acidic tuff unit in the lower Ryujin Formation of the Cretaceous Shimanto Supergroup, Kii Peninsula. The formation is of Late Campanian to Maastrichtian age based on the radiolarian fossil zone. CH-1 is a coarse pumiceous crystal tuff, and CH-2 is a coarse vitric crystal tuff. These specimens include three types of zircons; A group is characterized by euhedral form without abrasion, B group is euhedral but less abraded, and C group is much abraded and purplish. These characteristics of zircons indicate that A group is essential, while the others are detrital. A and B groups are major constituents and were selected for fission-track dating. The results demonstrate no significant difference in frequency distribution of grain age between both groups. Fission-track dating for essential zircons gave ages of 69.8±3.7 Ma (CH-1), and 67.5±3.4 Ma (CH-2). The FT ages of the tuff are within the age range of the radiolarian fossil zone of the Ryujin Formation, and indicate that the lower Ryujin Formation is of Late Maastrichtian age. The age constraint, in addition to previous geologic data, suggests that the coarse acidic tuff was derived from the simultaneous rhyolite pyroclastic rocks such as the Nohi Rhyolite and Suyama Pyroclastic Rocks distributed in the Chubu District of Southwest Japan. | |||||
資源タイプ(コンテンツの種類) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Article | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0016-7630 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AN00141768 | |||||
異版である | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | URI | |||||
関連識別子 | http://ci.nii.ac.jp/naid/110003022645/ | |||||
権利 | ||||||
権利情報 | 日本地質学会 | |||||
権利 | ||||||
権利情報 | 本文データは学協会の許諾に基づきCiNiiから複製したものである | |||||
出版タイプ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 |