Tectonic inheritance and structural styles in the Andean fold-thrust belt and foreland basin

Horton, Brian K.; Folguera, Andrés

doi:10.1016/b978-0-323-85175-6.00001-8

Cited by 11 publications

(5 citation statements)

References 181 publications

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“…Across the Hornocal fault, the Salta Group thickness changes. Its hanging wall contains >2,000 m of syn‐rift strata (McBride, 2008), whereas the footwall only shows a condensed post‐rift succession (Kocks, 1999; Siks & Horton, 2011), characteristic of an extensional basin‐bounding fault (e.g., Horton & Folguera, 2022). The Cianzo syncline (Figures 1b and 2) is located in the hanging wall of the Hornocal fault (Amengual & Zanettini, 1973).…”

Section: Geological Overviewmentioning

confidence: 99%

Structural Inheritance in the Eastern Cordillera, NW Argentina: Low‐Temperature Thermochronology of the Cianzo Basin

van Kooten,

Vallati,

Sobel

et al. 2024

Tectonics

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The present‐day deformation style of the Eastern Cordillera in NW Argentina is strongly influenced by the inversion of pre‐existing Paleozoic and Mesozoic structures. In particular, the extensional faults and lithological contrasts resulting from the Cretaceous–Paleogene Salta Rift phase form heterogeneities that were preferentially reactivated during the Andean orogeny. Constraining the timing and characteristics of reactivation is a key to understanding the interplay between tectonics and inherited crustal anisotropies. In this study, we combine structural and sedimentological field data with a low‐temperature thermochronology data set from the area surrounding the fault‐bounded Cianzo basin. The southeastern boundary is formed by the inverted Hornocal fault, which was the basin‐bounding normal fault of the Lomas de Olmedo sub‐basin (Salta Rift basin). Lacustrine deposits of the Yacoraite Formation overspill on the footwall of this fault and mark tectonic quiescence during the post‐rift phase of the Salta Rift. Apatite (U‐Th‐Sm)/He and fission track ages in the Hornocal fault hanging wall show an onset of rapid cooling interpreted to be concomitant with fault inversion between the latest Oligocene and middle Miocene (∼24–15 Ma). Low‐temperature thermochronology data also constrain the timing of major folding in the eastern limb of the Cianzo syncline to pre‐10 Ma, whereas the western limb started tilting post‐10 Ma. Characterization of exhumation patterns related to fault activity surrounding the Cianzo basin emphasizes the influence of the pre‐existing structural framework on deformation in fold‐and‐thrust belts.

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Section: Geological Overviewmentioning

confidence: 99%

Structural Inheritance in the Eastern Cordillera, NW Argentina: Low‐Temperature Thermochronology of the Cianzo Basin

van Kooten,

Vallati,

Sobel

et al. 2024

Tectonics

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“…Le relief est essentiellement composé de plaines d'épandage fluvioglaciaires d'âge quaternaire, inclinées vers l'océan Atlantique, ainsi que de plateaux volcaniques d'âge cénozoïque, désignés sous le nom de mesetas (Coronato et al, 2008). (Horton et Folguera, 2022). B : carte géologique de la Patagonie au sud de 48°S de latitude, indiquant l'emplacement du batholithe et de la ceinture plissée des Andes patagonnes, ainsi que du bassin d'avant-pays de Magallanes (Riviera et al, 2020).…”

Section: Caractéristiques Géologiques Et Orographiquesunclassified

Geomorphology and sedimentology of the Cerro Benítez of the cavities (Patagonia, Chile): genesis and evolution of a megafauna sedimentary trap during the last glaciation

Girault

2024

quaternaire

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Je remercie mon directeur Damase Mouralis, ma co-directrice Fabiana Martin, ainsi que mon coencadrant Dominique Todisco d'avoir accepté de me confier ce sujet de thèse, d'avoir supervisé mon travail avec la plus grande bienveillance et d'avoir relu en détail ce manuscrit. Je remercie Luis Borrero (université de Buenos Aires), Attila Çiner, Mehmet Akif Sarıkaya et Cengiz Yıldırım (université technique d'Istanbul), Amélie Quiquerez (université de Bourgogne) et Philippe Grandjean (université de Lyon 1) pour leur indispensable contribution scientifique.Je remercie les autres membres du laboratoire IDEES (université de Rouen), et notamment Raphaël

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“…Furthermore, the sharp bend in the overall trend of the gravity high at about 9.1°S and 70.2°W causes a change to the WNW trend south of 9.1°S (Figure 4a, numbers 3, 4 and 5) and the gravity low showing a WNW trend that breaks the main gravity high between 9°S and 10°S, near 68°W (Figure 4a, number 5), reinforce the interpretation that the positioning of the Iquitos Arch in the Acre Basin is controlled by old structures. This association inherent to the inboard advance of Andean deformation within continental plate interiors is largely related to inherited properties of preexisting structural anisotropies, which in turn are critical for strain localization in the thrust belt and adjacent foreland Horton & Folguera, 2022). This event is associated with the final separation between Gondwana and Laurasia continents during the Late Jurassic and resulted in expressive deformations and erosions both in the Brazilian basins of Solimões and Acre, as well as in the sub-Andean basins of the Central Andes (Caputo, 1991(Caputo, , 2014Erlich et al, 2018;Jacques, 2003;Mathalone & Montoya, 1995;Zamora & Gil, 2018), being correlated in age with the Nevadan orogeny in Western North America (Erlich et al, 2018;Mathalone & Montoya, 1995;Schweickert et al, 1984;Tobisch et al, 1987).…”

Section: Western Amazon Foredeepmentioning

confidence: 99%

The Acre Basin basement (NW Brazil) and the transition from the intracratonic to retroarc foreland basin system

Oliveira

Vidotti

2022

Basin Research

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The understanding of the crustal transition between orogenic zones and cratonic portions in distal regions of foreland basins has received increasing attention, but the analysis is often hampered by the sedimentary cover. Despite the peculiar location of the Acre Basin, specifically between the Amazonian Craton and the sub-Andean zone, local basement studies are still scarce due to lacking seismic data and exploratory wells. Therefore, this work aims to map basement depths, estimate crustal compositions and identify the main depocenters, structures and limits of Acre Basin using an integrated analysis to understand better the region lithospheric evolution, its relationship with the Amazonian Craton and its positioning within the Andean orogeny. For that, we used well, 2D seismic reflection, airborne and ground gravity and magnetic data as well as the EMG2008. Tilt Depth estimates indicate basement depths between 500 and 7800 m and larger sedimentary thicknesses in the northern portion. Additionally, we modelled groups of potential sources between 0.1 and 22 km and Moho depths between 26 and 37 km.Compositionally, the upper crust consists dominantly of meta-sedimentary and low-grade metamorphic rocks and granites, indicating that the sub-Andean and Acre Basins share a similar basement. Thus, there are indications that the basement of the Acre Basin is essentially formed by the Sunsás province in the Amazonian Craton. However, local differences in basement depth, magnetic susceptibility and exploratory potential led to the subdivision into Divisor and Xapuri sub-basins, north and south of the Fitzcarrald Arch, respectively. Finally, it was possible to establish the limits of the Andean orogeny influence in the Acre Basin and delimit the area of the Western Amazon Foredeep installed during the Neogene.

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Tectonic inheritance and structural styles in the Andean fold-thrust belt and foreland basin

Cited by 11 publications

References 181 publications

Structural Inheritance in the Eastern Cordillera, NW Argentina: Low‐Temperature Thermochronology of the Cianzo Basin

Structural Inheritance in the Eastern Cordillera, NW Argentina: Low‐Temperature Thermochronology of the Cianzo Basin

Geomorphology and sedimentology of the Cerro Benítez of the cavities (Patagonia, Chile): genesis and evolution of a megafauna sedimentary trap during the last glaciation

The Acre Basin basement (NW Brazil) and the transition from the intracratonic to retroarc foreland basin system

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