Salt décollement and rift inheritance controls on crustal deformation in orogens

Grool, Arjan R.; Huismans, Ritske S.; Ford, Mary

doi:10.1111/ter.12428

Cited by 17 publications

(20 citation statements)

References 24 publications

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“…(2014, 2015), and Grool et al. (2019) included a weak décollement horizon in the crust as used here and investigated its influence on relatively small orogenic wedges. Simplified sedimentation and erosion routines are relatively commonplace in geodynamic modeling (e.g., J. P. Butler et al., 2013; Erdős et al., 2014, 2015; Grool et al., 2019; Kelly et al., 2020).…”

Section: Discussionmentioning

confidence: 99%

Growth of Collisional Orogens From Small and Cold to Large and Hot—Inferences From Geodynamic Models

et al. 2021

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Continent-continent collision creates mountain belts that grow in size with increasing amounts of plate convergence. Orogenic temperature is directly related to the amount of crustal thickening by horizontal shortening, as heat producing elements are concentrated in upper and middle crustal rocks (e.g., Hacker et al., 2015). Crustal heating, in turn, has a weakening effect on crustal rheology and controls regional metamorphism; influencing mountain-belt structure and deformation. During orogenic growth, surface processes shape mountain-belt topography, fill the evolving foreland basins and exhume metamorphic rocks. In the end-member case, erosion may even fully balance orogenic growth, creating a flux steady state between tectonics and erosion (Stolar et al., 2007; Willett & Brandon, 2002). Beaumont et al. (2006) propose a temperature-magnitude relationship for orogenic growth from small and cold to large and hot, in analogy to the Hertzsprung-Russel diagram of stellar classification. The temperature-magnitude diagram, however, does not explain whether there is a characteristic distribution of shortening and structural style (e.g., thinand thickskinned deformation, thrusting style) as a function of orogen size, and its controlling factors. In this study, we use thermo-mechanical models that are fully coupled to a landscape-evolution model, to investigate the first-order factors controlling the distribution of shortening and the different structural styles related to orogenic growth from small and cold to large and hot during continent-continent collision. A typical example of a small and cold orogen is the Pyrenean mountain belt, which grew by inversion of a rift system with additional crustal shortening and plate convergence of at most 165 km (Beaumont et al., 2000; Muñoz, 1992). The Alps, an intermediate size orogen, have a more complex history, that includes

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Section: Discussionmentioning

confidence: 99%

Growth of Collisional Orogens From Small and Cold to Large and Hot—Inferences From Geodynamic Models

et al. 2021

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“…Crustal thinning, attested by thick late-Permian-Triassic detrital rift basins deposited above an erosive surface, is well documented on seismic lines along the Atlantic margins ( Fig. 2): the Nova Scotia-Moroccan basins (Welsink et al, 1989;Deptuck and Kendell, 2017;Hafid, 2000); Iberia-Grand Banks (Balkwill and Legall, 1989;Leleu et al, 2016;Spooner et al, 2019); the southern North Atlantic (Tankard and Welsink, 1987;Doré, 1991;Doré et al, 1999;Štolfová and Shannon, 2009;Peace et al, 2019b;Sandoval et al, 2019); the northern Western Approaches (Avedik, 1975;Evans, 1990;McKie, 2017); and the North Sea (McKie, 2017;Jackson et al, 2019;Hassaan et al, 2020;Phillips et al, 2019). Onshore Iberia (Arche and López Gómez, 1996;Soto et al, 2019) and in the Pyrenean-Provence domains (Lucas, 1985;Espurt et al, 2019;Cámara and Flinch, 2017;Bestani et al, 2016) (Fig.…”

Section: Introductionmentioning

confidence: 92%

“…The role of the weak Triassic evaporites in efficiently decoupling deformation in the pre-salt basement from the thinskinned extension in sedimentary cover has been emphasized largely in the Pyrenees (e.g., Grool et al, 2019;Duretz et al, 2019;Jourdon et al, 2020;Lagabrielle et al, 2020). Salt tectonics has also been suggested to have been particularly significant from the Jurassic through the Early Cretaceous in Mesozoic basins that shaped the NW-directed boundary between Ebro and Iberia, including the Basque-Cantabrian Basin (Cámara and Flinch, 2017), Parentis Basin (Ferrer et al, 2012), Cameros Basin (Rat et al, 2019), and Maestrat Basin (Vergés et al, 2020).…”

Section: Strike-slip Structures In the Intra-iberian Basinsmentioning

confidence: 99%

A reconstruction of Iberia accounting for Western Tethys–North Atlantic kinematics since the late-Permian–Triassic

et al. 2020

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Abstract. The western European kinematic evolution results from the opening of the western Neotethys and the Atlantic oceans since the late Paleozoic and the Mesozoic. Geological evidence shows that the Iberian domain recorded the propagation of these two oceanic systems well and is therefore a key to significantly advancing our understanding of the regional plate reconstructions. The late-Permian–Triassic Iberian rift basins have accommodated extension, but this tectonic stage is often neglected in most plate kinematic models, leading to the overestimation of the movements between Iberia and Europe during the subsequent Mesozoic (Early Cretaceous) rift phase. By compiling existing seismic profiles and geological constraints along the North Atlantic margins, including well data over Iberia, as well as recently published kinematic and paleogeographic reconstructions, we propose a coherent kinematic model of Iberia that accounts for both the Neotethyan and Atlantic evolutions. Our model shows that the Europe–Iberia plate boundary was a domain of distributed and oblique extension made of two rift systems in the Pyrenees and in the Iberian intra-continental basins. It differs from standard models that consider left-lateral strike-slip movement localized only in the northern Pyrenees in introducing a significant strike-slip movement south of the Ebro block. At a larger scale it emphasizes the role played by the late-Permian–Triassic rift and magmatism, as well as strike-slip faulting in the evolution of the western Neotethys Ocean and their control on the development of the Atlantic rift.

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“…Despite the requirement of such large movements in the Iberian Range geological evidence are lacking. This likely reflect the role played by the Triassic evaporites that decouples the large extension in the pre-salt basement from thinskinned extension in sedimentary cover as shown around Iberia by numerical studies (e.g., Grool et al, 2019;Duretz et al, 2019;Jourdon et al, 2020;Lagabrielle et al, 2020). 8 https://doi.org/10.5194/se-2020-24 Preprint.…”

Section: Late Jurassic-early Cretaceous (160-100 Ma)mentioning

confidence: 97%

A reconstruction of Iberia accounting for W-Tethys/N-Atlantic kinematics since the late Permian-Triassic

Angrand¹,

Mouthereau²,

Masini³

et al. 2020

Preprint

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Abstract. The West European kinematic evolution results from the opening of the West Neotethys and the Atlantic oceans since the late Paleozoic and the Mesozoic. Geological evidence shows that the Iberian domain well preserved the propagation of these two rift systems and is therefore key to significantly advance our understanding of the regional plate reconstructions. The Late Permian-Triassic tectonic evolution of Iberian rift basins shows that they have accommodated significant extension, but this tectonic stage is often neglected in most plate kinematic models, leading to the overestimation of the movements between Iberia and Europe during the subsequent Mesozoic (Early Cretaceous) rift phase. By compiling existing seismic profiles and geological constraints along the North Atlantic margins, including well data over Iberia, as well as recently published kinematic and paleogeographic reconstructions we propose a coherent kinematics model of Iberia that considers both the Neotethyan and Atlantic evolutions. Our model shows that the Europe-Iberia plate boundary was a domain of distributed and oblique extension made of two rift systems, in the Pyrenees and in the Iberian intra-continental basins. It differs from standard models that consider left-lateral strike-slip movement localized only in the northern Pyrenees in introducing a significant strike-slip movement south of Ebro accounting for Late Permian-Triassic extension and by emphasizing the need for an Ebro microcontinent. At a larger scale it emphasizes the role played by the late Permian-Triassic rift and magmatism, as well as strike-slip faulting in the evolution of the western Neotethyan Ocean and their control on localization of the Atlantic rift.

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Salt décollement and rift inheritance controls on crustal deformation in orogens

Cited by 17 publications

References 24 publications

Growth of Collisional Orogens From Small and Cold to Large and Hot—Inferences From Geodynamic Models

Growth of Collisional Orogens From Small and Cold to Large and Hot—Inferences From Geodynamic Models

A reconstruction of Iberia accounting for Western Tethys–North Atlantic kinematics since the late-Permian–Triassic

A reconstruction of Iberia accounting for W-Tethys/N-Atlantic kinematics since the late Permian-Triassic

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