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  1. 広島大学博士論文
  2. 2012年度以前

西南日本,広島県と島根県下に分布する花崗岩中に見られる粘土細脈と粘土鉱物

https://hiroshima.repo.nii.ac.jp/records/2005276
https://hiroshima.repo.nii.ac.jp/records/2005276
3fe2cd53-13e7-40f4-b00f-6b3abb5a5977
名前 / ファイル ライセンス アクション
diss_otsu1408.pdf diss_otsu1408.pdf (5.1 MB)
Item type デフォルトアイテムタイプ_(フル)(1)
公開日 2023-03-18
タイトル
タイトル Clay Veins and Clay Minerals in the Granitic Rocks in Hiroshima and Shimane Prefectures, Southwest Japan : Effect of the hydrothermal activities on the decomposition of the granitic rocks
言語 en
タイトル
タイトル 西南日本,広島県と島根県下に分布する花崗岩中に見られる粘土細脈と粘土鉱物
言語 ja
作成者 北川, 隆司

× 北川, 隆司

ja 北川, 隆司

en Kitagawa, Ryuji

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アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
権利情報
権利情報 Copyright(c) by Author
主題
主題Scheme NDC
主題 450
内容記述
内容記述 This paper deals with the clay minerals found in the granitic rocks distributed in Hiroshima and Shimane Prefectures with special reference to the effects of hydrothermal activities on the decomposition process of the granitic rocks. Many clay veins and hydrothermal clay deposits are commonly developed in the granitic rocks and their mode of occurrences were investigated in detail. the preferred orientations of the clay veins and microcracks found in the constituent minerals of granitic rocks were examined. The constituent clay minerals and their mineralogical characteristics of clay veins, clay deposits and alteration products of plagioclase in granitic rocks were investigated by means of X-ray diffraction, optical microscope, electron microscope(TEM and SEM), hydrogen isotope ratio and so on. The major results obtained are as follows. 1)The preferred orientations of microcracks within granitic rocks are very similar to those of clay veins which have been formed under the regional compression stress field. 2)Theconstituent clay mnerals of clay veins, clay deposits and alteration peoducts from plagioclase and theie mineralogical characteristics are almost identical with each other. 3)Mineral sequence found in the vertical direction of a clay vein and altered granitic rocks resemble to that ovserved in some present geothermal areas. 4)Mineralogical characteristics of the clay minerals indicate that the clay minerals were formed by hydrothermal solution subsequent to the post granitic activity. The temperature of hydrothermal solution ranges about 50゜-300゜ C and originated from meteoric water. Some clay minerals seem tobe directly precipitated from the hydrothemal solution. Based on the results mentioned above, it is considered that granitic rocks distributed in the investigated areas have been strongly fractured and characterized by remarkable alteration to clay minerals at hydrothermal stage before the weathering stage.
言語 en
内容記述
内容記述タイプ Other
内容記述 Journal of Science of the Hiroshima University, Series C, Vol.9, No.1 (1986) pp. 47-80
言語
言語 eng
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_db06
資源タイプ doctoral thesis
収録物識別子
収録物識別子タイプ ISSN
収録物識別子 0075-4374
収録物識別子
収録物識別子タイプ NCID
収録物識別子 AA00706718
開始ページ
開始ページ 47
書誌情報
巻 9, 号 1, p. 47-80
学位授与番号
学位授与番号 乙第1408号
学位名
言語 ja
学位名 博士(理学)
学位名
言語 en
学位名 Physical Science
学位授与年月日
学位授与年月日 1986-02-24
学位授与機関
学位授与機関識別子Scheme kakenhi
学位授与機関識別子 15401
言語 ja
学位授与機関名 広島大学
学位授与機関
言語 en
学位授与機関名 Hiroshima University
旧ID 20974
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