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  1. 学術雑誌論文
  2. その他
  1. 部局別インデックス
  2. 理学部

花崗岩質岩の浮きあがり,非圧縮性Newton流体とみなして

http://hdl.handle.net/20.500.12000/2988
http://hdl.handle.net/20.500.12000/2988
7e6ef745-f5b7-40a0-b8f4-184bfd15e91f
名前 / ファイル ライセンス アクション
Hayashi_d-07.pdf Hayashi_d-07.pdf
Item type デフォルトアイテムタイプ(フル)(1)
公開日 2008-01-17
タイトル
タイトル 花崗岩質岩の浮きあがり,非圧縮性Newton流体とみなして
言語 ja
作成者 林, 大五郎

× 林, 大五郎

ja 林, 大五郎

Hayashi, Daigoro

× Hayashi, Daigoro

en Hayashi, Daigoro

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
内容記述
内容記述タイプ Other
内容記述 Geological phenomena have been quantitatively studied so far by BERNER et al. (1972), DIETERICH et al. (1969) and others, who have considered a rock body to be a viscous fluid. However, the "Variational Principles" used as their theoretical basis are imperfect. Strictly speaking, these are not variational principles.\nIn the present paper, using the exact variational principle for the incompressible Newtonian fluid, the writer analysed numerically the "rising of a granitic mass", which is one of the important phenomena at the later stage of orogenesis, by employing only the gravity as an external force. For this study, models were assumed on a vertical plane with a round mass of migmatite (density 2.76g/cm^3, viscosities 10^<21> poises and 10^<20> poises) 8km in diameter, located in the crust (density 3.04g/cm^3, viscosity 10^<22> poises) 10km below the ground surface (free surface). So the migmatite mass should move upward according to its buoyant force.\nThe results of the analysis using the models are concluded as follows: (1) The centre of the migmatite mass rises initially at the rate of 0.5-0.7mm/year, and thereafter the rate gradually decreases with the progress of the rise until it finally becomes zero when the centre reached the depth of approximately 3km. (2) The amount of the rise of the earth's surface is 100-150m in maximum. (3) The viscosity of a buoyant mass does not concern with the rate of the rising of a buoyant mass, but it affects the shape of the lower half of the mass. (4) The value of deviation stresses ranges from several to several tens of bars throughout the region in question, and the corresponding strain rates are 10^<-12>-10^<-16> sec^<1->.\nIt is apparent from the above results, especially the second one, that some other factors than gravity must be considered for the mountain-building process, otherwise the formation of mountains as high as several kilometers cannot be expected as the later stage of orogenesis.
内容記述タイプ Other
内容記述 論文
出版者
言語 ja
出版者 日本地質学会
言語
言語 jpn
資源タイプ
資源タイプ journal article
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
識別子
識別子 http://hdl.handle.net/20.500.12000/2988
識別子タイプ HDL
収録物識別子
収録物識別子タイプ ISSN
収録物識別子 0016-7630
収録物識別子タイプ NCID
収録物識別子 AN00141768
収録物名
言語 ja
収録物名 地質学雑誌
書誌情報
巻 81, 号 12, p. 769-782
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