Cohesive strength and seismogenic stress pattern along the active basement faults of the Precordillera-Sierras Pampeanas ranges, western Argentina: An experimental analysis by means of numerical model
文献类型：期刊论文
| 作者 | Islam, Md. Rafiqul |
| 刊名 | JOURNAL OF MOUNTAIN SCIENCE
 |
| 出版日期 | 2009-12 |
| 卷号 | 6期号:4页码:331–345 |
| 关键词 | Finite element method Rock physical property Fold-and-thrust belt Fault strength Seismogenic shear stress pattern |
| ISSN号 | 1672-6316 |
| 通讯作者 | Islam, MR |
| 英文摘要 | A two-dimensional finite element method (FEM) model that incorporates faults, elastic rock physical properties, topographical load due to gravity and far-field plate velocity boundary conditions was used to recognize the seismogenic stress state along the fold-and-thrust belt of the Precordillera-Sierras Pampeanas ranges of western Argentina. A plane strain model with nine experiments was presented here to examine the fault strength with two major rock phyical properties: cohesion and angle of internal friction. Mohr-Coulomb failure criterion with bulk rock properties were applied to analyse faults. The stress field at any point of the model was assumed to be comprised of gravitational and tectonic components. The analysis was focused to recognize the seismogenic shear strain concentrated in the internal-cristaline domain of the orogene shown by the modeling. Modeling results are presented in terms of four parameters, i. e., (i) distributions, orientations, and magnitudes of principal stresses (sigma(1) and sigma(3)), (ii) displacement vector, (iii) strain distribution, and (iv) maximum shear stress (tau (max) ) contour line within the model. The simulation results show that the compressive stress is distributed in and around the fault systems. The overall orientation of sigma(1) is in horizontal directions, although some stress reorientations do occur within weaker parts, especially subsequent to the faults. A large-scale shear stress is accumulating along the active faults of Tapias-Villicum Fault (TVF), Salinas-Berros Fault (SBF), Ampacama-Niquizanga Fault (ANF) and Las Charas Fault (CF), which could act as local stress and strain modulators to localize the earthquakes occurrence. |
| 语种 | 英语 |
| 公开日期 | 2013-08-14 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/6034]  |
| 专题 | 成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2009_Vol6 No.4 |
| 推荐引用方式 GB/T 7714 | Islam, Md. Rafiqul. Cohesive strength and seismogenic stress pattern along the active basement faults of the Precordillera-Sierras Pampeanas ranges, western Argentina: An experimental analysis by means of numerical model[J]. JOURNAL OF MOUNTAIN SCIENCE,2009,6(4):331–345. |
| APA | Islam, Md. Rafiqul.(2009).Cohesive strength and seismogenic stress pattern along the active basement faults of the Precordillera-Sierras Pampeanas ranges, western Argentina: An experimental analysis by means of numerical model.JOURNAL OF MOUNTAIN SCIENCE,6(4),331–345. |
| MLA | Islam, Md. Rafiqul."Cohesive strength and seismogenic stress pattern along the active basement faults of the Precordillera-Sierras Pampeanas ranges, western Argentina: An experimental analysis by means of numerical model".JOURNAL OF MOUNTAIN SCIENCE 6.4(2009):331–345. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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