Item type |
デフォルトアイテムタイプ(フル)(1) |
公開日 |
2007-10-25 |
タイトル |
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タイトル |
FEM simulation of fold-and-thrust belts in the South Central High Andes of Chile and Argentina |
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言語 |
en |
作成者 |
Islam, Md. Rafiqul
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 |
FEM analysis for stress determination of fold-and-thrust belts of the South Central High Andes (SCRA) was carried out on Paleozoic to Quaternary rocks from the Coastal Cordillera to Precordillera regions of the Chile and Argentinean Andes, between 30^o and 33^o south latitudes. A two-dimensional vertical cross-section including 8 layers through the Andean crust up to Moho has been represented by a finite element model composed of an assembly of 2699 elements and 1456 nodes in a state of plane strain conditions. The model is assumed to be multilayered lithospheric crustal block undergoing convergence. and we choose to demonstrate our results by applying horizontal displacement rate (average velocity of 6.50 cm/yr) of descending Nazca plate. The failure of elements is defined by adopting the concept of Mohr-Coulomb failure criterion. The assigned rock rheology and physical properties of each layer in simulation make the model behavior as elastic body in which well defined failure location gives a hint of thrust development. Studies of lithospheric\ndeformation of the fold-and-thrust belts in this zone where structural style varies from thinskinned to thick-skinned fold-and-thrust belts have revealed various compressional states of stress. The maximum compressional stress (σ_1) was generally oriented in an E-W direction. Along the westernmost part of the Coastal Cordillera, the strain deformation is extensional in some elements. which can be explained by a co-seismic crustal bending readjustment. Overall study results imply that most of the basement-involved deep thrusts (about 20 km) and deformation. occurred within the upper crustal parts that lie in. Layers-4, 5 and 6, are more likely related to crustal anisotropy. |
内容記述 |
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内容記述タイプ |
Other |
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内容記述 |
紀要論文 |
出版者 |
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言語 |
ja |
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出版者 |
琉球大学理学部 |
言語 |
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言語 |
eng |
資源タイプ |
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資源タイプ |
departmental bulletin paper |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
出版タイプ |
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出版タイプ |
NA |
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出版タイプResource |
http://purl.org/coar/version/c_be7fb7dd8ff6fe43 |
識別子 |
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識別子 |
http://hdl.handle.net/20.500.12000/447 |
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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 |
ISSN |
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収録物識別子 |
0286-9640 |
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 |
AN00250774 |
収録物名 |
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言語 |
ja |
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収録物名 |
琉球大学理学部紀要 |
収録物名 |
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言語 |
en |
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収録物名 |
Bulletin of the College of Science. University of the Ryukyus |
書誌情報 |
号 83,
p. 29-60,
発行日 2007-03
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