Kinematic models of deformation at an oblique ramp

Apotria, Theodore G.; Snedden, William T.; Spang, John H.; Wiltschko, David V.

doi:10.1007/978-94-011-3066-0_12

Cited by 32 publications

(24 citation statements)

References 19 publications

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“…There is no deflection over the lateral ramp for both sand-box and analytical models [Apotria et al, 1992;Wilkerson et al, 1992]. The deflection directions are consistent with those obtained from the FE model.…”

Section: Materials Displacement Directions In Different Parts Of the Msupporting

confidence: 82%

“…[42] Sand-box experiments [Wilkerson et al, 1992] and analytical models [Apotria et al, 1992] with similar geometric setups show map view deflection of 6°and 3.4°( toward the oblique ramp dip direction) over the oblique ramp, respectively. There is no deflection over the lateral ramp for both sand-box and analytical models [Apotria et al, 1992;Wilkerson et al, 1992].…”

Section: Materials Displacement Directions In Different Parts Of the Mmentioning

confidence: 99%

“…These boundaries constitute a 3-D array of preexisting ramps (frontal, lateral and/or oblique ramps with respect to regional transport direction) and flats. In particular, deformation response over the lateral and oblique ramps plays an important role during the evolution of a salient [Apotria et al, 1992;Wilkerson et al, 1992;Apotria, 1995;Kwon and Mitra, 2004a].…”

Section: Introductionmentioning

confidence: 99%

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Effect of predeformational basin geometry in the kinematic evolution of a thin‐skinned orogenic wedge: Insights from three‐dimensional finite element modeling of the Provo salient, Sevier fold‐thrust belt, Utah

2007

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[1] In fold-thrust belts, sedimentary cover rocks are detached from undeformed basement and undergo crustal-scale shortening and internal deformation. We have investigated a three-dimensional (3-D), nonlinear, elastic-plastic finite element model using the restored Provo salient of the Sevier belt as our initial configuration. In the model the deformed sedimentary prism displays large-scale geometries that are seen in many natural fold-thrust belts (e.g., arcuate salient, wedge-shaped cross section) and kinematics that are compatible with observations in the internal and external portions of the Provo salient; these suggest that the model can be used to predict geologic information that is generally not available from detailed observational studies in natural fold-thrust belts (e.g., strain history, material displacements, stress conditions). The model results indicate symmetric, noncoaxial, plane strain paths with consistent stress and strain orientations and material displacement directions in the middle of the 3-D wedge, and fully 3-D, nonsymmetric, noncoaxial, nonplane strain paths with out-of-transport material displacements over the lateral boundaries. The results from test runs further suggest that oblique ramps with strike direction less than 20°from the regional transport direction behave like lateral ramps, and those with strike direction greater than 80°from the regional transport direction behave similar to frontal ramps. Oblique ramps with dips greater than 60°behave like tear faults. These variations in different parts of the wedge are caused mainly by interaction between the transport parallel motion of the moving wedge and the preexisting footwall template of ramps and flats that the wedge has to ride over during its evolution.Citation: Kwon, S., G. Mitra, and R. Perucchio (2007), Effect of predeformational basin geometry in the kinematic evolution of a thin-skinned orogenic wedge: Insights from three-dimensional finite element modeling of the Provo salient, Sevier fold-thrust belt, Utah,

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Section: Materials Displacement Directions In Different Parts Of the Msupporting

confidence: 82%

Section: Materials Displacement Directions In Different Parts Of the Mmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of predeformational basin geometry in the kinematic evolution of a thin‐skinned orogenic wedge: Insights from three‐dimensional finite element modeling of the Provo salient, Sevier fold‐thrust belt, Utah

2007

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“…1 The ramp-flat geometry of the thrust (Apotria 1988). Thrust displacement transfers through faults, as well as folds, which were created as a result of thrusting Fig.…”

Section: P Kováćmentioning

confidence: 99%

“…Apotria et al 1992;Apotria 1995;Apotria and Wilkerson 2002). The existence of oblique ramps is connected with a change in the morphology of the underlying basement (Apotria 1995).…”

Section: Introductionmentioning

confidence: 99%

The internal structure of Paleoalpine thrusts of the Western Carpathians: A case study from the Križná thrust system

Kovac¹

2007

Central European Geology

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The aim of this article is to point out the complicated internal structure of Paleoalpine thrusts of the Western Carpathians and the consequential ambiguous interpretations of the tectonic transport of these tectonic units. The example used here is that of the internal structure of the Kriźná thrust system in the area of the Demänová and Il'anová Valleys in Nízke Tatry Mountains.The form that the Kriźná thrust takes is that of three individual thrust sheets. These overthrust each other along differently oriented thrust ramps. The geometry of the ramps influences the direction of the thrust displacement of the individual thrust sheets of the Kriźná thrust.

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Plunging fault propagation folds: a case study from the Bhutan Himalayas

Ray

1997

Evolution of Geological Structures in Micro- To Macro-Scales

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Kinematic models of deformation at an oblique ramp

Cited by 32 publications

References 19 publications

Effect of predeformational basin geometry in the kinematic evolution of a thin‐skinned orogenic wedge: Insights from three‐dimensional finite element modeling of the Provo salient, Sevier fold‐thrust belt, Utah

Effect of predeformational basin geometry in the kinematic evolution of a thin‐skinned orogenic wedge: Insights from three‐dimensional finite element modeling of the Provo salient, Sevier fold‐thrust belt, Utah

The internal structure of Paleoalpine thrusts of the Western Carpathians: A case study from the Križná thrust system

Plunging fault propagation folds: a case study from the Bhutan Himalayas

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