Item type |
デフォルトアイテムタイプ(フル)(1) |
公開日 |
2008-01-18 |
タイトル |
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タイトル |
Numerical Modelling of Graben Faults with Special Reference to Thakkhola Half Graben, Central Nepal Himalaya |
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言語 |
en |
作成者 |
Chamlagain, Deepak
Hayashi, Daigoro
林, 大五郎
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アクセス権 |
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アクセス権 |
open access |
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アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
内容記述 |
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内容記述タイプ |
Other |
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内容記述 |
Thakkhola half graben is a product of Late Cenozoic extensional tectonics in the Himalaya-Tibetan region. A series of 2D finite element models are generated to simulate its first order characteristics using stress field and induced fault pattern as structural proxies. Extensional graben faults form in the upper weak layer and propagate downward with increasing extension. Clusters of failure elements at the two ends of the graben directly correspond to the graben bounding faults and the asymmetric feature is characterized by uneven development of faults therein. The syntectonic deposits are characterized by normal fauls in the tensional stress field, which is a common feature of the small-scale graben at post rift deformation stage. The proposed models suggest that depth of a graben growth fault is primarily controlled by the initial fault and density of the syntectonic deposits. Assumption of a weak zone (Thakkhola fault system) does not make significant difference in stress distribution and faulting. It is thus suggested that a weak zone only can not contribute to the development of a half graben. The spreading boundary condition could not simulate the existing fault configuration in the Thakkhola half graben. Our modelling results for the graben suggest gravitational collapse of the elevated plateau rather than mantle upwelling during spreading. |
内容記述 |
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内容記述タイプ |
Other |
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内容記述 |
論文 |
出版者 |
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出版者 |
Wadia Institute of Himalayan Geology |
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言語 |
en |
言語 |
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言語 |
eng |
資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
出版タイプ |
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出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
識別子 |
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識別子 |
http://hdl.handle.net/20.500.12000/3011 |
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識別子タイプ |
HDL |
収録物識別子 |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AA00213390 |
収録物名 |
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収録物名 |
Himalayan Geology |
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言語 |
en |
書誌情報 |
巻 27,
号 2,
p. 95-110
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