The role of inherited tectono-sedimentary architecture in the development of the central Andean mountain belt: Insights from the Cordillera de Domeyko

Amilibia, A.; Sàbat, F.; McClay, Ken; Muñoz, J. A.; Roca, Eduard; Chong, Guillermo

doi:10.1016/j.jsg.2008.08.005

Cited by 132 publications

(97 citation statements)

References 38 publications

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“…The tectonic shortening accommodated by these structures during the partial inversion of the basin is 30% equivalent to 13.1 km, which is consistent with recent estimates in the northernmost regions such as the Cordillera de Domeyko (Amilibia et al, 2008), and higher than those calculated for certain regions of the Frontal Cordillera in Argentina and the Sierras Pampeanas (Cristallini et al, 1997) in the Puna Plateau. Previous studies conducted throughout the region (Jensen, 1976;Soffia, 1989) have estimated shortening values of 25%, while to the south of the Tránsito River, Reutter (1974) estimated 40% in thick-skinned structures.…”

Section: Discussionsupporting

confidence: 90%

“…Similarly, it has formed major oppositevergent thick-skinned thrust fault systems (Reutter, 1974;Jensen, 1976, Nassi et al, 1985Ribba, 1986;Soffia, 1989;Moscoso and Mpodozis, 1988), as well as inverted structures, which can be observed in the Domeyko Cordillera (Amilibia et al, 2008). A good example of the Mesozoic depocenters in the western part of the northern Chilean Andes is the Lautaro Basin.…”

Section: Discussionmentioning

confidence: 99%

“…1a), which combining reflection seismic and outcrop data, show that it formed as a consequence of tectonic inversion of a Jurassic-Early Cretaceous back-arc basin within a continuous contractional regime in the Cordillera de Domeyko from mid-Cretaceous through Paleogene times (Muñoz et al, 2002;Mpodozis et al, 2005;Arriagada et al, 2006a;Jordan et al, 2007). It has been proposed that the main structural style of the Cordillera de Domeyko is strongly dependent on 'inherited structures', and that the shortening is due to reactivation of pre-existing extensional faults related to Triassic and Late Jurassic-Early Cretaceous rifts (Amilibia et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

“…Although evidence of tectonic shortening and mountain building between the Late Cretaceous and the Tertiary seems reasonably well documented for the Andes of northern Chile (Moscoso and Mpodozis, 1988;Maksaev and Zentilli, 1999;Mpodozis et al, 2005;Arriagada et al, 2006a;Jordan et al, 2007;Amilibia et al, 2008), the complex interactions between extensional and compressional structures remain unresolved. Consequently, so far consistent evidence has not been shown to account for the structural style of the superposed Tertiary inversion.…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, so far consistent evidence has not been shown to account for the structural style of the superposed Tertiary inversion. Only a few recent papers (Amilibia et al, 2008) have intended to describe the structures formed during the proposed extension-dominated period and those formed during inversion of the back-arc basins.…”

Section: Introductionmentioning

confidence: 99%

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The Lautaro Basin: A record of inversion tectonics in northern Chile

Martínez

Arriagada

Mpodozis

et al. 2012

andgeo

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ABsTrACT. The Triassic and Jurassic tectonic history of northern Chile has been dominated by extension, although clear evidence about the nature and geometry of the extensional basins and subsequent inversion structures has been adequately illustrated in only a few cases. In this contribution we present a structural study of the Lautaro Basin located at the western edge of the Frontal Cordillera in the Atacama region of northern Chile. The Lautaro Basin is a Jurassic half-graben, filled by at least 2,600 m of marine deposits of the Lautaro Formation and developed on top of, at least 2,000 m of Triassic volcanic successions of the La Ternera Formation, also accumulated during an earlier period of extensional deformation. Detailed field mapping and construction of a regional balanced cross-section, supported by good exposures along the Copiapó River valley, allow reconstruction of the structural style of both the Jurassic and Triassic extensional depocenters. New structural data have shown that the Lautaro Basin has a complex structural framework reflected in two major Mesozoic extensional periods, overprinted by Cenozoic inversion involving thin-and thick-skinned tectonics. Shortening was accommodated by a combination of inversion of pre-existing normal faults, buttresses, development of footwall short-cuts, and both thin and thick-skinned thrusting. New estimates of shortening are up to 13.1 km (30%), while Mesozoic extension is estimated to be 3 km (7%). resuMen. La Cuenca Lautaro: un registro de inversión tectónica en el norte de Chile. Durante el Triásico y Jurá-sico la evolución tectónica del norte de Chile fue dominada por extensión cortical. No obstante, evidencias claras acerca del estilo estructural y subsecuente inversión de las cuencas asociadas con el evento extensional, han sido ilustradas en pocos casos. En este trabajo, se presenta un estudio estructural de la Cuenca Lautaro, localizada en el borde occidental de la Cordillera Frontal, en la región de Atacama del norte de Chile. La Cuenca Lautaro, es un hemigraben que aloja al menos 2.600 m de depósitos marinos de la Formación Lautaro, acumulados sobre al menos 2.000 m de sucesiones volcánicas triásicas de la Formación La Ternera. Los excelentes afloramientos de la región permitieron construir una sección balanceada y restaurar el estilo estructural de los depocentros extensionales triásicos y jurásicos. Los resultados obtenidos muestran que la Cuenca Lautaro tiene una arquitectura estructural compleja, reflejada en dos episodios extensionales mayores. Posteriormente, se sobreimpone al menos un evento de inversión tectónica que desarrolla una tectónica mixta de piel fina y piel gruesa. El acortamiento se acomoda por una combinación de inversión de fallas preexistentes, desarrollo de fallas de atajo y corrimientos de piel fina y piel gruesa, que involucran bloques rígidos o 'buttresses'. Las estimaciones de acortamiento son de 13,1 km (30%), mientras que la extensión mesozoica es de 3 km (7%).

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Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Lautaro Basin: A record of inversion tectonics in northern Chile

Martínez

Arriagada

Mpodozis

et al. 2012

andgeo

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Tectonic Regimes of the Central and Southern Andes: Responses to Variations in Plate Coupling During Subduction

2018

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Construction of the Andes has been governed largely by fluctuating contractional, neutral, and extensional tectonic regimes during differing degrees of mechanical coupling along the convergent plate boundary. These three contrasting regimes are likely regulated by geodynamic variations in absolute trenchward motion of South America and episodic regional shifts in the geometry of the subducting oceanic slab. Alternations among these three modes are revealed in syntheses of Mesozoic‐Cenozoic crustal deformation, basin evolution, and arc magmatism along orogen‐perpendicular transects across the central and southern Andes at 23°S, 35°S, and 43°S. Despite considerable along‐strike dissimilarities in the magnitude of deformation, a comparable tectonic regime typified the early Andean history, as defined by a transition from Late Jurassic‐Early Cretaceous postrift thermal subsidence to Late Cretaceous retroarc shortening. A key contradiction is expressed for the late middle Eocene to earliest Miocene, when neutral to extensional conditions affected retroarc to forearc regions, except in parts of the central Andes, which experienced retroarc shortening with only localized forearc extension. This mixed‐mode scenario during Paleogene time may reflect decoupling along the plate boundary (possibly during slab rollback within a retreating subduction system) in which widespread stasis or low‐magnitude extension dominated the southern Andes but was inhibited in the strongly shortened central Andes at 15–25°S where shallow subduction and/or high topography boosted plate coupling. Comparable temporal and spatial shifts in tectonic regime along the Andes and other convergent margins can be related to variable degrees of coupling during first‐order plate‐scale changes in convergence and second‐order regional cycles of slab shallowing and steepening.

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Deformation pattern analysis and tectonic implications of a décollement level within the Central Apennines (Italy)

Tavani

Cifelli

2010

Geological Journal

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This work reports structural and anisotropy of magnetic susceptibility (AMS) measurements from an Upper Miocene décollement level exposed in the central Apennine fold-and-thrust belt of Italy. The décollement level is located at the boundary between the MesozoicCenozoic carbonate sequence and the overlying Miocene-Pliocene syn-orogenic siliciclastic sediments and consists of a thick shear zone, mainly affecting detritic limestones, dominated by pressure solution cleavage oblique to the bedding.In the study area, the décollement level was active during the early stages of evolution of the fold-and-thrust belt, when deeper décollement levels were active in more internal zones, and accounted for the bulk top-to-foreland translation of the siliciclastic portion of the multilayer. The increasing deformation led to the progressive foreland migration of deeper décollement levels (and of thrusts emanating from these levels) that were active in the more internal sectors. Consequently, the Mesozoic-Cenozoic carbonate sequence was folded and faulted and the studied décollement became inactive and was incorporated into the fold-and-thrust belt. Pressure solution cleavage within the décollement became a passive marker that underwent rotations associated with later deformational phases. Results indicate that pressure solution cleavage registers two phases of deformation: (1) during thrusting and folding, when beds were folded and (2) at a later stage, when cleavage was rotated, together with thrusts and folds, about vertical axes. This second stage is interpreted as having been induced by the oblique inversion of a Liassic normal fault, during the Miocene compression.

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The role of inherited tectono-sedimentary architecture in the development of the central Andean mountain belt: Insights from the Cordillera de Domeyko

Cited by 132 publications

References 38 publications

The Lautaro Basin: A record of inversion tectonics in northern Chile

The Lautaro Basin: A record of inversion tectonics in northern Chile

Tectonic Regimes of the Central and Southern Andes: Responses to Variations in Plate Coupling During Subduction

Deformation pattern analysis and tectonic implications of a décollement level within the Central Apennines (Italy)

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