Multidisciplinary approach to an extensional syncline model for the Mesozoic Cameros Basin (N Spain)

Sáinz, Antonio María Casas; Villalaín, Juan José; Soto, Ruth; Gil-Imaz, A.; Río, P. del; Fernandez, Gonzalo A.

doi:10.1016/j.tecto.2008.04.020

Cited by 46 publications

(42 citation statements)

References 31 publications

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“…Galdeano et al 1989;Moreau et al 1992Moreau et al , 1997Villalaín et al 1994Villalaín et al , 2003Juárez et al 1998;Dinarès-Turell & García-Senz 2000;Osete et al 2004Osete et al , 2007Gong et al 2008a;Soto et al 2008Soto et al , 2011Casas et al 2009). Most of these overprints have been dated as Cretaceous, similar to the remagnetization of Mesozoic sediments from the High Atlas found in the present study.…”

Section: Discussionmentioning

confidence: 99%

“…Most of these overprints have been dated as Cretaceous, similar to the remagnetization of Mesozoic sediments from the High Atlas found in the present study. Examples of these Cretaceous remagnetizations involve not only the Iberian Chain (Maestrazgo basin, Moreau et al 1992;Cameros basin, Villalaín et al 2003;Casas et al 2009;Central Iberian basin, Juárez et al 1998;Osete et al 2007), but also other regions such as the Lusitanian basin (Galdeano et al 1989;Márton et al 2004), and South Pyrenean basins (Organyà basin, Dinarés-Turell & García-Senz 2000;Gong et al 2008a;Cabuérniga basin, Soto et al 2008;Polientes basin, Soto et al 2011). These remagnetization events are controversial, and have been linked to two different scenarios: (1) wholesale remagnetization probably linked to subcrustal processes, involving large areas at the plate scale (Juárez et al 1998), or (2) progressive remagnetization linked to the geodynamic evolution of each basin (Gong et al 2009) and associated with sedimentary burial.…”

Section: Discussionmentioning

confidence: 99%

“…The statistical solution is obtained by minimizing the sum A= Σ│α M │ of the angular distances (α M ) between the direction and each small circle (see Waldhör & Appel 2006). This method has been successfully used for finding the remagnetization characteristic direction in Mesozoic basins in Iberia (Soto et al 2008(Soto et al , 2011Casas et al 2009;Gong et al 2009). …”

Section: Age Of Remagnetizationmentioning

confidence: 99%

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Widespread Cretaceous secondary magnetization in the High Atlas (Morocco). A common origin for the Cretaceous remagnetizations in the western Tethys?

Torres-López

Villalaín

Sáinz

et al. 2014

JGS

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In this paper, we present the first palaeomagnetic data (51 sites) for Mesozoic (Lower–Middle Jurassic) sediments of the Moroccan Central High Atlas and address the study of a widespread remagnetization. The remagnetization is characterized by a very stable component with systematic normal polarity, carried by magnetite. The relationship between the magnetic properties and location within the basin suggests that the acquisition of the remagnetization is controlled by basin geometry. Fold-tests indicate that the overprint acquisition is syn-folding in some structures but clearly predates the Tertiary compressional stage. Using the small circle intersection method we have calculated the remagnetization direction ( D = 336.4°, I = 29.2°). Comparison with the global apparent polar wander path indicates that the remagnetization was acquired during the Late Cretaceous (probably Cenomanian). Considering both the basinal confinement of remagnetization and the connection with other remagnetization events in the western Tethys, we propose a scenario explaining widespread remagnetizations in the region, concerning both basin-scale conditions mainly related to sediment thickness and a regional-scale thermal event acting as catalyst of remagnetizations in those sedimentary basins that satisfy the basin-scale conditions.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Age Of Remagnetizationmentioning

confidence: 99%

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Widespread Cretaceous secondary magnetization in the High Atlas (Morocco). A common origin for the Cretaceous remagnetizations in the western Tethys?

Torres-López

Villalaín

Sáinz

et al. 2014

JGS

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“…The Mesozoic Cameros Basin has a synclinal geometry, with maximum cumulative thickness in the central areas that decreases progressively toward the north and the south (Casas et al, 2009). Mas et al (1993) stated that there are 5000 meters of vertical cumulative thickness of sediment, mostly continental, from the Tithonian to the Albian.…”

Section: Geographical and Geological Settingmentioning

confidence: 99%

Palaeoecological inferences about dinosaur gregarious behaviour based on the study of tracksites from La Rioja area in the Cameros Basin (Lower Cretaceous, Spain)

Landaluce

Lorente

2014

Journal of Iberian Geology

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In La Rioja the widespread ichnological record of dinosaurs ranges from the Berriasian to the Aptian age (Early Cretaceous). There, due to the high palaeodiversity, several evidences of gregarious behaviour can be observed in different types of footprints (sauropods, theropods and ornithopods). Moreover, due to the huge dimensions of some sites, different types of dinosaur tracks representing gregarious behaviour can be found very close in space and time. All these evidences have been compiled and analysed, obtaining an overview of this type of behaviour in relation to the type of trackmaker. Twenty-eight evidences of gregariousness have been found, of which nine are of sauropod footprints, twelve of theropod, seven of ornithopod, and one of unknown bipedal dinosaurs. These data have been further divided into accumulations and sets of parallel trackways. In sauropod footprints the main evidence is represented by the accumulations of tracks made by herds of individuals of the same size. In ornithopod footprints there are accumulations and parallel trackways of large size individuals and even family groups. In theropod footprints, sets of parallel trackways of few individuals of the same size (from small to medium) are the most common evidence and there are no data about gregariousness in large theropod footprints. Thus, data were obtained on different sizes of herds, size of individuals and structure of the groups depending on different ichnotypes, providing information about important palaeoecological aspects of their trackmakers, such as population structure.Keywords: dinosaurs, footprints, gregarious behaviour, Cretaceous, La Rioja, Spain Resumen En La Rioja existe un abundante registro icnológico de dinosaurios en materiales de edades Berriasiense-Aptiense (Cretácico Inferior). En ellos se pueden observar diferentes muestras de comportamiento gregario en distintos tipos de huellas (saurópodas, terópodas y ornitópodas). Incluso debido al gran tamaño de algunos yacimientos, se pueden encontrar muestras de comportamiento gregario de distintos tipos de dinosaurios muy próximas en el espacio y en el tiempo. Se han recopilado todas estas evidencias y se han analizado para obtener así una visión global de este tipo de comportamiento en funcion de los dinosaurios que las produjeron. Se ha obtenido un total de veintiocho evidencias de gregarismo, de las cuales nueve son de icnitas saurópodas, doce de terópodas, siete de ornitópodas y una de dinosaurios bípedos indeterminados. Todas estas evidencias se han dividido en acumulaciones y conjuntos de rastros paralelos. En icnitas saurópodas se observan fundamentalmente acumulaciones de huellas atribuidas a manadas constituidas todas por individuos de talla media. En cuanto a icnitas ornitópodas, hay acumulaciones y conjuntos de rastros paralelos de individuos de gran tamaño así como grupos familiares de pocos individuos. En icnitas terópodas se observan más evidencias de conjuntos de rastros paralelos con individuos generalmente de talla semejante (pequeña a median...

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“…This particular structure was responsible for the relative horizontal movement of about 30 km between the Ebro basin (the foreland basin to the Pyrenees) and the inner part of the Iberian plate, and for a vertical displacement of more than 5 km, creating a major sedimentary continental trough fed by the hanging wall of the thrust during Cenozoic times (Casas and Faccenna 2001). In spite of its dimensions, the structure of the Cameros-Demanda thrust is relatively simple, having slight dip changes and lacking vertical-axis rotations (Villalaín et al 2003;Casas et al 2009). The complete sedimentary record at its footwall also permits dating and characterizing the stages of tectonic activity (Muñoz-Jiménez and Casas-Sainz 1997).…”

Section: Introductionmentioning

confidence: 99%

Multidisciplinary approach to constrain kinematics of fault zones at shallow depths: a case study from the Cameros–Demanda thrust (North Spain)

Sáinz

Román‐Berdiel

Oliva‐Urcia

et al. 2016

Int J Earth Sci (Geol Rundsch)

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Thrusting at shallow depths often precludes analysis by means of structural indicators effective in other geological contexts (e.g., mylonites, sheath folds, shear bands). In this paper, a combination of techniques (including structural analysis, magnetic methods, as anisotropy of magnetic susceptibility and paleomagnetism, and paleothermometry) is used to define thrusting conditions, deformation, and transport directions in the Cameros–Demanda thrust (North Spain). Three outcrops were analyzed along this intraplate, large-scale major structure having 150 km of outcropping length, 30 km of maximum horizontal displacement, and 5 km of vertical throw. Results obtained by means of the different techniques are compared with data derived from cross sections and stratigraphic analysis. Mixed-layer illite–smectite and vitrinite reflectance indicating deep diagenetic conditions and mature stage of hydrocarbon generation suggests shallow depths during deformation, thus confirming that the protolith for most of the fault rocks is the footwall of the main thrust. Kinematic indicators (foliation, S/C structures, and slickenside striations) indicate altogether a dominant NNW movement of the hanging wall in the western zone and NE in the eastern zone of the thrust, thus implying strain partitioning between different branches of the main thrust. The study of AMS in fault rocks (nearly 400 samples of fault gouge, breccia, and microbreccia) indicates that the strike of magnetic foliation is oblique to the transport direction and that the magnetic lineation parallelizes the projection of the transport direction onto the kmax/kint plane in sites with strong shear deformation. Paleomagnetism applied to fault rocks indicates the existence of remagnetizations linked to thrusting, in spite of the shallow depth for deformation, and a strong deformation or scattering of the magnetic remanence vectors in the fault zone. The application of the described techniques and consistency of results indicate that the proposed multidisciplinary approach is useful when dealing with thrusts at shallow crustal levels

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Multidisciplinary approach to an extensional syncline model for the Mesozoic Cameros Basin (N Spain)

Cited by 46 publications

References 31 publications

Widespread Cretaceous secondary magnetization in the High Atlas (Morocco). A common origin for the Cretaceous remagnetizations in the western Tethys?

Widespread Cretaceous secondary magnetization in the High Atlas (Morocco). A common origin for the Cretaceous remagnetizations in the western Tethys?

Palaeoecological inferences about dinosaur gregarious behaviour based on the study of tracksites from La Rioja area in the Cameros Basin (Lower Cretaceous, Spain)

Multidisciplinary approach to constrain kinematics of fault zones at shallow depths: a case study from the Cameros–Demanda thrust (North Spain)

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