Mechanical stratigraphy as a factor controlling the development of a sandbox transfer zone: a three-dimensional analysis

Ravaglia, Antonio; Turrini, C.; Seno, Silvio

doi:10.1016/j.jsg.2004.04.009

Cited by 24 publications

(9 citation statements)

References 39 publications

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“…Additionally, modeling and field observations have indicated that the presence of preexisting heterogeneities within a basin (e.g., abrupt transitions between thin versus thick pre‐tectonic strata or the isolated presence of a weak detachment horizon) may significantly effect structural geometries. If such heterogeneities were present in this region of the fold‐thrust belt, we should expect to see differential propagation of the thrust fronts and the presence of transfer structures between the two fronts [e.g., Calassou et al ., ; Corrado et al ., ; Ravaglia et al ., ], neither of which we observe. For these reasons, we do not consider variations in basal detachment orientation or strength to be robust explanations for the observed division in the map area, instead suggesting that Akharbakhar‐Qäbälä represents a subcritical region driven by high rates of syn‐tectonic sedimentation.…”

Section: Discussioncontrasting

confidence: 83%

Structural geometries and magnitude of shortening in the eastern Kura fold‐thrust belt, Azerbaijan: Implications for the development of the Greater Caucasus Mountains

et al. 2013

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[1] The Greater Caucasus are the northernmost extent of the Arabia-Eurasia collision and are thought to represent the main locus of shortening within the central portion of the collision zone between 40and 48 E. Recent work suggests that in detail, since the Plio-Pleistocene, much of the shortening in the eastern portion of the Caucasus system has been focused within the Kura fold-thrust belt along the southeastern margin of the Greater Caucasus. Here we present new field mapping and stratigraphic investigations of the eastern termination of the Kura fold-thrust belt in Azerbaijan to better constrain the structural geometries, magnitude of shortening, and initiation age for this portion of the fold-thrust belt. Our work suggests that this area of the fold-thrust belt exhibits significant along-strike variations in structural style and evolution and can effectively be divided into two distinct domains at~48 E. The western domain is characterized by a subcritical median surface slope and isolated folds and thrusts propagating out of sequence, whereas the eastern domain is dominated by a single duplex structure and a history of in-sequence development in a critically tapered wedge. We hypothesize that these variations result from changes in relative rates of syn-tectonic sedimentation, erosion, and convergence velocity along strike. We find that within the western domain, the fold-thrust belt has accommodated~12 km of total shortening. An unconformity within the western domain brackets the initiation age of this portion of the fold-thrust belt to between 1.8 and 0.88 Ma yielding permissible average shortening rates of between 6.7 and 13.6 mm/yr. Comparison of these average shortening rates to the geodetically measured shortening rate of 8 mm/yr indicates that since initiation, the fold-thrust belt has accommodated 83-100% of convergence between the Greater and Lesser Caucasus at this longitude.Citation: Forte, A. M., E. Cowgill, I. Murtuzayev, T. Kangarli, and M. Stoica (2013), Structural geometries and magnitude of shortening in the eastern Kura fold-thrust belt, Azerbaijan: Implications for the development of the Greater Caucasus Mountains, Tectonics, 32,

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Section: Discussioncontrasting

confidence: 83%

Structural geometries and magnitude of shortening in the eastern Kura fold‐thrust belt, Azerbaijan: Implications for the development of the Greater Caucasus Mountains

et al. 2013

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“…Example of a rare NA outcrop can be found in the San Colombano hill, an isolated relief in the middle of the plain (Toscani et al, ; Zuffetti, Bersezio, Contini, & Petrizzo, ; Zuffetti, Bersezio, & Trombino, ) (a in Figure a). According to several authors, the origin of the structural salients was strongly controlled by thickness variations in the stratigraphic succession on the downbending Adria microplate, corresponding to abrupt, tectonic‐controlled rheological changes (Ravaglia, Seno, Toscani, & Fantoni, ; Ravaglia, Turrini, & Seno, ; Turrini et al, , ). In map view, the asymmetry of three arcs is compatible with an oblique collisional framework (Bally, Burbi, Cooper, & Ghelardoni, ; Carminati, Lustrino, & Doglioni, ; Cibin, Di Giulio, & Martelli, ; Maino, Decarlis, Felletti, & Seno, ; Muttoni et al, ; Vanossi, Perotti, & Seno, ).…”

Section: Geological Settingmentioning

confidence: 99%

From cylindrical to non‐cylindrical foreland basin: Pliocene–Pleistocene evolution of the Po Plain–Northern Adriatic basin (Italy)

et al. 2019

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The architecture of foreland basins and the resulting distribution of clastic sediments are related to the constant interplay between tectonics and sedimentation. Specifically, basin floor modifications strongly influence dimensions, continuity and connections of sand‐size and fine‐grained deposits. Given the increasing need to identify deep potential reservoir deposits, the large‐scale definition of clastic porous targets and their seals is a matter of interest for oil and gas industry. Here, we present the reconstruction of the Po Plain and Northern Adriatic Foreland Basin (with an extent of ca. 40,000 km2) and its Pliocene–Pleistocene evolution, as an example of a sedimentary clastic system controlled by strongly non‐cylindrical foreland geometry. The study is based on the basin‐scale mapping of six unconformity‐bounded sequences, performed by interpreting a dense network of seismic lines and correlating well‐log data. This provides a three‐dimensional model of the step‐by‐step evolution of the basin and a description of the sediment dispersal pattern. We found that the basin records the change from a continuous (cylindrical) to highly fragmented (non‐cylindrical) foredeep geometry during Late Pliocene. In the Northern Apennines case, the main factors driving the development of a non‐cylindrical geometry are mainly related to inherited inhomogeneity in the downgoing block linked to its Mesozoic extensional faulting, and the relative orientation of these lineaments with respect to the direction of orogen migration. During the late Pliocene–Pleistocene the two directions progressively became close to parallel, and the Northern Apennines system reacted changing from a cylindrical to a non‐cylindrical state.

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“…Transfer zones have been studied by analog modeling [ Baby et al , 1996; Schreurs et al , 2002; Ravaglia et al , 2004] that showed the role of lateral variations of the mechanical stratigraphy in the development of oblique ramps and tear faults. The above structural analysis shows the importance of the Gafsa fault in the structuring of the Tunisian southern Atlas.…”

Section: Oblique Ramps Tear Faults and Paleogeographymentioning

confidence: 99%

Structure, paleogeographic inheritance, and deformation history of the southern Atlas foreland fold and thrust belt of Tunisia

Said¹,

Baby²,

Chardon³

et al. 2011

Tectonics

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Structural analysis of the southern Tunisian Atlas was carried out using field observation, seismic interpretation, and cross section balancing. It shows a mix of thick‐skinned and thin‐skinned tectonics with lateral variations in regional structural geometry and amounts of shortening controlled by NW‐SE oblique ramps and tear faults. It confirms the role of the Late Triassic–Early Jurassic rifting inheritance in the structuring of the active foreland fold and thrust belt of the southern Tunisian Atlas, in particular in the development of NW‐SE oblique structures such as the Gafsa fault. The Late Triassic–Early Jurassic structural pattern is characterized by a family of first‐order NW‐SE trending normal faults dipping to the east and by second‐order E‐W trending normal faults limiting a complex system of grabens and horsts. These faults have been inverted during two contractional tectonic events. The first event occurred between the middle Turonian and the late Maastrichtian and can be correlated with the onset of the convergence between Africa and Eurasia. The second event corresponding to the principal shortening tectonic event in the southern Atlas started in the Serravalian‐Tortonian and is still active. During the Neogene, the southern Atlas foreland fold and thrust belt propagated on the evaporitic décollement level infilling the Late Triassic–Early Jurassic rift. The major Eocene “Atlas event,” described in hinterland domains and in eastern Tunisia, did not deform significantly the southern Tunisian Atlas, which corresponded in this period to a backbulge broad depozone.

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Mechanical stratigraphy as a factor controlling the development of a sandbox transfer zone: a three-dimensional analysis

Cited by 24 publications

References 39 publications

Structural geometries and magnitude of shortening in the eastern Kura fold‐thrust belt, Azerbaijan: Implications for the development of the Greater Caucasus Mountains

Structural geometries and magnitude of shortening in the eastern Kura fold‐thrust belt, Azerbaijan: Implications for the development of the Greater Caucasus Mountains

From cylindrical to non‐cylindrical foreland basin: Pliocene–Pleistocene evolution of the Po Plain–Northern Adriatic basin (Italy)

Structure, paleogeographic inheritance, and deformation history of the southern Atlas foreland fold and thrust belt of Tunisia

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