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  1. 紀要論文
  2. 琉球大学理学部紀要
  3. 79号
  1. 部局別インデックス
  2. 理学部

Fault development in the Thakkhola half graben : insights from numerical simulation

http://hdl.handle.net/20.500.12000/2612
http://hdl.handle.net/20.500.12000/2612
b1bbe2f7-6660-4fdd-a4df-d4884156019c
名前 / ファイル ライセンス アクション
No79p57.pdf No79p57.pdf
Item type デフォルトアイテムタイプ(フル)(1)
公開日 2007-12-10
タイトル
タイトル Fault development in the Thakkhola half graben : insights from numerical simulation
言語 en
作成者 Chamlagain, Deepak

× Chamlagain, Deepak

en Chamlagain, Deepak

Hayashi, Daigoro

× Hayashi, Daigoro

en Hayashi, Daigoro

林, 大五郎

× 林, 大五郎

ja 林, 大五郎

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 Grabens of southern Tibet and the Himalaya represent the Cenozoic extensional tectonic phase, which has affected whole Tibet and northernmost part of the Himalaya. Thakkhola half graben, on the crest of the Himalaya, is one of the north trending grabens that define the Neogene structural pattern of the southern margin of the Tibetan Plateau and is seemingly enigmatic feature in a regionally contractional tectonic setting between the colliding plates. Two-dimensional, elastic, plane-strain, finite element models (FEMs) are generated to simulate the effects of geometry and rock properties on growth of graben faults and their configuration for the Thakkhola half graben evolution. The performed models have shown that the extensional graben faults form at the top of the overburden and propagate downward as we increased extensional displacement. Simulated models have clearly defined the graben bounding faults. Further they are able to suggest that natural grabens have multiple faults on each side rather than single fault. During progressive extensional displacement depth of faulting increases and deformation is mainly localized in downthrown block both in basement and syntectonic deposits. Syntectonic deposit is characterized by normal faulting in tensional tectonic stress field, which is a common feature of the small-scale graben at post rift deformation stage. The width and depth of graben are primarily controlled by the rheology of the upper elastic layer and syntectonic deposits. The applied rock layer properties are able to deduce the first order characteristics of the Thakkhola half graben. Therefore, this simulation constrains probable values for the rock layer properties controlling the Thakkhola half graben evolution. Assumption of the weak zone does not make significant difference on stress distribution and faulting. Thus it seems that the Thakkhola fault system only did not contribute to development of the half graben.
内容記述タイプ Other
内容記述 紀要論文
出版者
言語 ja
出版者 琉球大学理学部
言語
言語 eng
資源タイプ
資源タイプ departmental bulletin paper
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/20.500.12000/2612
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 0286-9640
収録物識別子タイプ NCID
収録物識別子 AN00250774
収録物名
言語 ja
収録物名 琉球大学理学部紀要
書誌情報
号 79, p. 57-90
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