Evolution of a fold-thrust belt deforming a unit with pre-existing linear asperities: Insights from analog models

Burberry, Caroline M.; Swiatlowski, Jerlyn L.

doi:10.1016/j.jsg.2016.04.005

Cited by 7 publications

(5 citation statements)

References 38 publications

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“…The Neogene tectonic scenario was characterized by indentation of Adria in the Alps accompanied by eastward escape of the Eastern Alps tectonic unit (Ustaszewski et al., 2008). The northward movement of Adria was accommodated in the northern and central Dinarides by localized strike‐slip deformation along major dextral, NNW‐SSE striking fault systems (Merlini et al., 2002; Picha, 2002; Placer et al., 2010; Van Unen et al., 2019) that often‐reactivated Mesozoic extensional faults of the Adria passive margin, produced by E‐W to ENE‐WSW extension during the Neo‐Tethys rift in the Jurassic (Burberry & Swiatlowski, 2016). During the early to middle Miocene, freshwater lacustrine sediments accumulated in intramontane basins in the High Karst and Pre‐Karst domains (Dinaric Lake System).…”

Section: Geological Settingmentioning

confidence: 99%

Deformation Sequence and Paleofluids in Carbonate Buckle Folds Under Transpression (Pag Anticline, External Dinarides, Croatia)

Lucca,

Mittempergher,

Succo

et al. 2023

Tectonics

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Contractional deformation structures at the front of transpressional orogens display complex three‐dimensional geometries deviating from the interpretative templates commonly applied in thrust belts. Accordingly, detailed constraints on deformation patterns and associated paleofluid circulation are desirable, especially for fracture geometry and permeability predictive purposes. The Pag anticline, which is located in the Dinaric fold and thrust belt, provides an appropriate field site for studying fold‐ and fault‐related deformation structures in a transpressive setting. We performed a multiscale structural analysis together with petrographic and stable isotope characterization of the deformation‐related calcite cements. Structural mapping suggests that the Pag anticline is a detachment fold developed mainly by buckling, since large‐scale thrust faults are absent. Fold tightening in a transpressive setting produced a complex deformational structure including two sets of N‐S right‐lateral and E‐W left‐lateral late‐stage strike‐slip fault sets trending oblique to the NW‐SE fold axis. The pre‐folding deformation pattern includes incipient normal faults likely related to the forebulge stage, veins and stylolites coherent with NE‐SW layer parallel shortening contraction in a strike‐slip regime, and metric to decametric scale conjugate thrusts coherent with layer parallel shortening in a compressive regime. Buckle folding preceded propagation of a series of accommodation structures during fold tightening. Petrographic and isotopic data indicate meteoric alteration of the Cretaceous platform carbonates in the prefolding stage, likely due to forebulge subaerial exposure. Layer parallel shortening and early syn‐folding veins involved formational fluids resulting from mixed marine and meteoric fluids during folding at shallow burial conditions. Eventually, meteoric fluid infiltrated again along strike‐slip faults, acting as cross‐formational conduits in the postfolding stage.

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Section: Geological Settingmentioning

confidence: 99%

Deformation Sequence and Paleofluids in Carbonate Buckle Folds Under Transpression (Pag Anticline, External Dinarides, Croatia)

Lucca,

Mittempergher,

Succo

et al. 2023

Tectonics

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“…Our modeling here provides a systematic experimental framework for understanding diversity of modeled wedge front deformation and real ones in nature. Before the application to natural cases, following assumptions should be clarified: 1) Knife-cut weak zones have been introduced as IFs (e.g., Di Bucci et al, 2007;Burberry and Swiatlowski, 2016;Maestrelli et al, 2021a, b;Wang et al, 2021, Fig. 2).…”

Section: Experimental Limitationsmentioning

confidence: 99%

“…In contrast to previous studies that introduce complex sets of IFs by carrying out an initial extensional event (e. g., Eisenstadt and Sims, 2005;Granado et al, 2017;Li et al, 2018;Wang et al, 2021), we created a single pre-existing fault by cutting through sand horizon with a thin knife. This kind of "pre-cut" faults can be precisely located in the sandbox with a pre-determined geometry (e.g., Bellahsen and Daniel, 2005;Burberry and Swiatlowski, 2016;Maestrelli et al, 2021a, b), allowing us to take a systematic approach exploring the parameters studied here. We buried the pre-existing faults right beneath the front of topographic slope as an analogue to the inherited faults reported in mountain front earthquakes (Fig.…”

Section: Introductionmentioning

confidence: 99%

Analogue sandbox modeling of orogenic wedge front faulting: Roles of inherited fault zones and topographic loading

Sun

Zheng

et al. 2022

Journal of Structural Geology

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“…The interaction between pre-existing basement structures and the overlying salt layer is a major controlling factor in the deformation of different tectonosedimentary basins worldwide (Table 1; Misra & Mukherjee, 2015). Several studies have discussed the effect of basal décollement (Cotton & Koyi, 2000;Bahroudi & Koyi, 2003;Sherkati et al 2006;Misra & Mukherjee, 2015;Farzipour-Saein & Koyi, 2016) and basement steps (Farzipour-Saein et al 2013;Tong et al 2014;Burberry & Swiatlowski, 2016;Lacombe & Bellahsen, 2016;Godin et al 2019;Razavi Pash et al 2021a) on the deformation of fold-and-thrust belts. Moreover, the spatial configuration and geometry of the deformation front of fold-and-thrust belts are affected by surface processes (sedimentation and erosion) (Storti & McClay, 1995;Koyi & Maillot, 2007;Pla et al 2019) and transverse strike-slip basement fault (Hessami et al 2001a;Sepehr & Cosgrove, 2004;Farzipour-Saein et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Effect of inherited structural highs on the structure and kinematics of the South Dezful Embayment, SW Iran

et al. 2022

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Understanding the structural evolution of the South Dezful Embayment (SDE) in the Zagros Fold-and-Thrust Belt (ZFTB) is significant for hydrocarbon exploration and production. The structural evolution of this area has been controlled by the reactivation of basement structures related to the oblique convergence along the ZFTB. In this work, we study the effect of the pre-contractional interaction between the basement step and overlaid salt layer superimposed by the Zagros shortening on the structural style and evolution of the sedimentary basin in the SDE. We use multidisciplinary approaches involving surface and subsurface data and analogue models. Disharmonic folds with small wavelength formed over the Kharg-Mish Palaeo-high (KMPH) where the sedimentary cover is thinner. On the other hand, faulted detachment folds with large wavelengths developed in the adjacent depocenters. Furthermore, the KMPH affected the geometry and kinematics of the frontal part of the Zagros Belt, which is characterized by the Mountain Front Flexure (MFF) topographic step. Long-lasting active deformation of the sedimentary cover over the frontal ramp of the KMPH developed the South Izeh Promontory (SIP). Localized contraction in the SIP was accommodated temporally by trishear fault-propagation folding and resulted in > 5 km elevation difference between this promontory and two adjacent local basins. Supporting scaled analogue models show that structural evolution, folding and along-strike variations in fold style of the SDE have been controlled by thickness variations of the sedimentary cover and the geometry of the inherited pre-salt structure. Based on the results of this study, the effect of inherited structural highs on the structure and kinematics of the SDE provide important insights for hydrocarbon entrapment, migration and exploration.

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Evolution of a fold-thrust belt deforming a unit with pre-existing linear asperities: Insights from analog models

Cited by 7 publications

References 38 publications

Deformation Sequence and Paleofluids in Carbonate Buckle Folds Under Transpression (Pag Anticline, External Dinarides, Croatia)

Deformation Sequence and Paleofluids in Carbonate Buckle Folds Under Transpression (Pag Anticline, External Dinarides, Croatia)

Analogue sandbox modeling of orogenic wedge front faulting: Roles of inherited fault zones and topographic loading

Effect of inherited structural highs on the structure and kinematics of the South Dezful Embayment, SW Iran

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