Sedimentary basin taper as a factor controlling the geometry and advance of thrust belts

Boyer, Steven E.

doi:10.2475/ajs.295.10.1220

Cited by 132 publications

(98 citation statements)

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“…These are in general also the areas where the foreland monocline is steeper [2]. The Apennines foredeep was punctuated by the growth of folds which terminated along transfer zones.…”

Section: Foreland Dip Versus Thrust Belt Structure Foredeep and Seismentioning

confidence: 95%

“…1) is a common feature for all thrust belts and accretionary wedges [1,2]. The foreland geology is often understated in regional studies of orogens, in spite of its crucial role in controlling the thrust belts evolution.…”

Section: Introductionmentioning

confidence: 99%

“…The foreland monocline tends to increase its dip toward the interior of the belts, both in oceanic and continental subduction zones [3,4] or associated back-thrust belts, and its subsidence rate controls the development of the trench or the foreland basin [5^8]. The basement top in foreland basins is usually convex upward [2]. Usually the steeper foreland monoclines are the areas of faster subsidence, whatever their origin.…”

Section: Introductionmentioning

confidence: 99%

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The dip of the foreland monocline in the Alps and Apennines

Mariotti

Doglioni

2000

Earth and Planetary Science Letters

107

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“…These are in general also the areas where the foreland monocline is steeper [2]. The Apennines foredeep was punctuated by the growth of folds which terminated along transfer zones.…”

Section: Foreland Dip Versus Thrust Belt Structure Foredeep and Seismentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The dip of the foreland monocline in the Alps and Apennines

Mariotti

Doglioni

2000

Earth and Planetary Science Letters

107

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“…To keep the experiments as simple as possible, the influence of interlayered detachment layers, which plays an important role in numerous fold-andthrust belts [e.g., Davis and Engelder, 1985] including the southern Pyrenees [Séguret, 1972;Muñoz, 1992;Soto et al, 2004], was not simulated. Moreover, the influence of surface processes (syntectonic erosion and sedimentation) was not included in the experiments, as well as the forelandward tapering that commonly occurs in natural rock multilayers deposited in foreland basins [e.g., Boyer, 1995]. These limitations, which characterize most sandbox experiments [e.g., Malavieille, 1984;Liu et al, 1992;Mulugeta and Koyi, 1992;Wang and Davis, 1996;Storti et al, 2001;Smit et al, 2003], do not significantly impact model results when the role of specific parameters is investigated by comparing experimental results without attempting to simulate in detail the internal architecture of natural orogens [Storti et al, 2000].…”

Section: Experimental Limitsmentioning

confidence: 99%

Impact of backstop thickness lateral variations on the tectonic architecture of orogens: Insights from sandbox analogue modeling and application to the Pyrenees

Soto¹,

Storti

Sáinz

2006

Tectonics

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[1] We performed sandbox analogue models to investigate the influence of along-strike tapering of the backstop on the three-dimensional architecture of natural doubly vergent thrust-fold belts, applying the results to a natural example as the Pyrenees. Available geological and geophysical data indicate that the European crust, which provided the backstop in the Pyrenean orogen, has a westward tapering on both the upper (westward thickening of the Mesozoic cover rocks) and the lower (westward rising of the Moho) envelope surfaces. Accordingly, we performed laboratory models characterized by backstops with an along-strike tapering of either the upper or the lower surface. Our results indicate a significant impact of backstop lateral tapering in thrust wedge architecture in terms of the outward propagation of the deformation fronts, the width and elevation of the axial zone, and the timing of thrust polarity reversal along strike. When compared to the Pyrenees, our results support the inferred westward tapering of the European basement and its commonly accepted backstop role in the Pyrenean orogen. Moreover, comparison between the map pattern of the Pyrenees and of laboratory experiments suggests that the along-strike tapering of the bottom envelope surface of the backstop played a most important role on the three-dimensional thrust wedge architecture than the tapering of the upper envelope surface. Citation: Soto, R., F. Storti, and A. M. Casas-Sainz (2006), Impact of backstop thickness lateral variations on the tectonic architecture of orogens: Insights from sandbox analogue modeling and application to the Pyrenees, Tectonics, 25, TC2005,

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“…The foreland geology is often understated in regional studies of orogens, in spite of its crucial role in controlling the thrust beits evolution . The foreland monocline tends to increase its dip toward the interior of the beits (Boyer, 1995), and its subsidence rate controls the development of the trench or the foreland basin, whatever is their origin .…”

Section: Abstracttmentioning

confidence: 99%