Abstract
Three-dimensional finite-element (FE) analysis of a fold-thrust belt wedge model provides graphical and quantitative information for the strain geometry, kinematics, and mechanics of salient formation in three-dimensional space. A nonlinear, elastic-plastic FE model, using the initial basin configuration of the restored Provo salient, Utah, develops realistic deformation features (e.g., salient) in the deformed sedimentary prism. The three-dimensional fold-thrust belt wedge model shows different deformation characteristics (based on S1 Υmax, and σ1 orientations and material-displacement directions) in different parts of the salient, and its behavior is closely related to the preexisting template of the predeformational basin shape. The model results indicate plane-strain deformation with symmetric finite-strain geometry in the middle of the salient and nonplane-strain deformation with nonsymmetric finite-strain geometry at the lateral boundaries. Thus, conventional two-dimensional plane-strain assumptions in fold-thrust belt analysis (e.g., in balancing cross sections) are reasonable only in the middle of the salient; however, at the lateral boundaries, the results indicate fully three dimensional deformation and suggest that restorations need to be more carefully constrained in three dimensions on the basis of detailed geologic data.
| Original language | English |
|---|---|
| Pages (from-to) | 561-564 |
| Number of pages | 4 |
| Journal | Geology |
| Volume | 32 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 2004 Jul 1 |
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All Science Journal Classification (ASJC) codes
- Geology
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Three-dimensional finite-element modeling of a thin-skinned fold-thrust belt wedge : Provo salient, Sevier belt, Utah. / Kwon, Sanghoon; Mitra, Gautam.
In: Geology, Vol. 32, No. 7, 01.07.2004, p. 561-564.Research output: Contribution to journal › Article
TY - JOUR
T1 - Three-dimensional finite-element modeling of a thin-skinned fold-thrust belt wedge
T2 - Provo salient, Sevier belt, Utah
AU - Kwon, Sanghoon
AU - Mitra, Gautam
PY - 2004/7/1
Y1 - 2004/7/1
N2 - Three-dimensional finite-element (FE) analysis of a fold-thrust belt wedge model provides graphical and quantitative information for the strain geometry, kinematics, and mechanics of salient formation in three-dimensional space. A nonlinear, elastic-plastic FE model, using the initial basin configuration of the restored Provo salient, Utah, develops realistic deformation features (e.g., salient) in the deformed sedimentary prism. The three-dimensional fold-thrust belt wedge model shows different deformation characteristics (based on S1 Υmax, and σ1 orientations and material-displacement directions) in different parts of the salient, and its behavior is closely related to the preexisting template of the predeformational basin shape. The model results indicate plane-strain deformation with symmetric finite-strain geometry in the middle of the salient and nonplane-strain deformation with nonsymmetric finite-strain geometry at the lateral boundaries. Thus, conventional two-dimensional plane-strain assumptions in fold-thrust belt analysis (e.g., in balancing cross sections) are reasonable only in the middle of the salient; however, at the lateral boundaries, the results indicate fully three dimensional deformation and suggest that restorations need to be more carefully constrained in three dimensions on the basis of detailed geologic data.
AB - Three-dimensional finite-element (FE) analysis of a fold-thrust belt wedge model provides graphical and quantitative information for the strain geometry, kinematics, and mechanics of salient formation in three-dimensional space. A nonlinear, elastic-plastic FE model, using the initial basin configuration of the restored Provo salient, Utah, develops realistic deformation features (e.g., salient) in the deformed sedimentary prism. The three-dimensional fold-thrust belt wedge model shows different deformation characteristics (based on S1 Υmax, and σ1 orientations and material-displacement directions) in different parts of the salient, and its behavior is closely related to the preexisting template of the predeformational basin shape. The model results indicate plane-strain deformation with symmetric finite-strain geometry in the middle of the salient and nonplane-strain deformation with nonsymmetric finite-strain geometry at the lateral boundaries. Thus, conventional two-dimensional plane-strain assumptions in fold-thrust belt analysis (e.g., in balancing cross sections) are reasonable only in the middle of the salient; however, at the lateral boundaries, the results indicate fully three dimensional deformation and suggest that restorations need to be more carefully constrained in three dimensions on the basis of detailed geologic data.
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U2 - 10.1130/G20415.1
DO - 10.1130/G20415.1
M3 - Article
VL - 32
SP - 561
EP - 564
JO - Geology
JF - Geology
SN - 0091-7613
IS - 7
ER -