The transition from thick-skinned to thin-skinned tectonics in the Basque-Cantabrian Pyrenees: the Burgalesa Platform and surroundings

Carola, Eloi; Muñoz, Josep Antón; Roca, Eduard

doi:10.1007/s00531-015-1177-z

Cited by 41 publications

(34 citation statements)

References 79 publications

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“…Results show that the Triassic Keuper appears to have a mean thickness of 1660 m with a maximum of 2020 m around the centre-east of the area. This is in agreement with the data derived from exploration well Rojas NE-1, near Hontomín, where a total thickness of 1400 m was drilled (Carola et al, 2015). The borders of the study area appear to be the location where the Triassic Keuper is thinnest, with values of about 1200 m. In general, the thickness of the layer is conditioned by the mobility of the salt and the migration pathways generated by the tectonic events.…”

Section: Results From the Microgravity Datasupporting

confidence: 88%

“…The remain- Figure 12. Correlation of the joint gravity and seismic model with that presented by Carola et al (2015). Note the thickening of the salt layer to the NW.…”

Section: Structural Setting Of the Sedimentary Covermentioning

confidence: 78%

“…at the NW end of the gravimetric model also contrasts with the position of the basement top at −2800 m b.s.l. 5 km to the north as interpreted by Carola et al (2015) based on seismic data (Fig. 12).…”

Section: Structural Setting Of the Sedimentary Covermentioning

confidence: 88%

“…The presence of a detaching level represented by the Keuper Triassic salts produced the forced folding in the upper sedimentary cover by migration of these salts (Tavani et al, 2013;Carola et al, 2015). For the area of study, Carola et al (2015) have suggested a thin-skinned configuration based on surface geology, well data and vintage seismic lines.…”

Section: Structural Setting Of the Hontomín Dome Basementmentioning

confidence: 99%

“…Exploration wells have drilled different thicknesses, ranging from 2000 to just 300 m (Carola et al, 2015). This is also the case in the Hontomín area, where the average thickness of the Keuper evaporites is 1660 m with a maximum of 2020 m and a minimum of 1200 m. This thickening generates a gravity low observed in the BA map, which appears somehow displaced from the south fault, as is also clearly pictured in the 2-D models and the cross sections derived from 3-D models (Figs.…”

Section: Structural Setting Of the Sedimentary Covermentioning

confidence: 99%

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Basement structure of the Hontomín CO<sub>2</sub> storage site (Spain) determined by integration of microgravity and 3-D seismic data

et al. 2016

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Abstract. A multidisciplinary study has been carried out in Hontomín (Spain) to determine the basement structural setting, its geometry and the geometry of the sedimentary succession of an area aimed to be the first Spanish pilot plant for CO 2 storage. An integration of coincident 3-D seismic results, borehole data and unpublished microgravity data were used to reproduce the deep structure and topography of the basement and to quantify the thickness of the Triassic Keuper evaporites. The subsurface structure is characterized by a half-graben setting filled with Keuper evaporites (up to 2000 m thick), forming an extensional forced fold. All data sets clearly identify two main fault systems, compartmentalizing the main structural domain into three differentiated blocks. These faults have been interpreted to be reactivated normal faults that have led to the formation of the Hontomín dome.

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Section: Results From the Microgravity Datasupporting

confidence: 88%

“…The remain- Figure 12. Correlation of the joint gravity and seismic model with that presented by Carola et al (2015). Note the thickening of the salt layer to the NW.…”

Section: Structural Setting Of the Sedimentary Covermentioning

confidence: 78%

Section: Structural Setting Of the Sedimentary Covermentioning

confidence: 88%

Section: Structural Setting Of the Hontomín Dome Basementmentioning

confidence: 99%

Section: Structural Setting Of the Sedimentary Covermentioning

confidence: 99%

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Basement structure of the Hontomín CO<sub>2</sub> storage site (Spain) determined by integration of microgravity and 3-D seismic data

et al. 2016

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Influence of rift basin geometry on the subsequent postrift sedimentation and basin inversion: The Organyà Basin and the Bóixols thrust sheet (south central Pyrenees)

2015

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The extensional period in the Bay of Biscay-Pyrenean domain during the Early Cretaceous influenced subsequent Upper Cretaceous contractional Alpine structures of the Pyrenean orogen. In the Pyrenees, the Lower Cretaceous rift system shows en echelon geometries for different basins, with the Organyà Basin being one of the most important. This basin is located in the southern central Pyrenees, and the inversion of its W-E southern margin has been related to the development of the Bóixols thrust sheet, the northernmost of the south Pyrenean thrust sheets. Detailed interpretation of outcrop and seismic reflection data has revealed the presence of a NNW-SSE trending relay area, which corresponds to the western boundary of the Organyà Basin. The postrift facies belts parallel this boundary. The geometry of the contractional structures shows related variations such as changes in the structural relief and the plunge and the wavelength across this relay area. The synorogenic sediments also show characteristic thickness variations and onlap geometries perpendicular to thrust-transport direction. These evidences highlight the presence of this extensional margin and corroborate its influence in the subsequent stages of the evolution of the area. Seismic, well, and field data have been incorporated into a 3-D structural model in order to better understand the 3-D geometry of the study area.

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Alpine exhumation of the central Cantabrian Mountains, Northwest Spain

et al. 2016

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The Cantabrian Mountains extend along the Atlantic coast of northern Spain and are known to have experienced an Alpine phase of deformation, reactivating well-expressed Variscan structures. They form the westward continuation of the Pyrenean range and were similarly uplifted consequently to the convergence between the Iberian and European plates. Nevertheless, due to the scarcity of syntectonic sediments and structural markers in a large outcrop of Variscan basement, little is known about the precise timing and amount of the Alpine exhumation phase in the Cantabrian Mountains. We present a new low-temperature thermochronology data set, composed of nine apatite fission track (AFT) and six zircon (U-Th)/He (ZHe) ages, sampled along structurally well-constrained N-S profiles through the central part of the Cantabrian Mountains and complemented by 3-D thermokinematic modeling. The occurrence of Eocene-Oligocene AFT and ZHe ages in the center of the profiles allows us to frame the period of Alpine exhumation from 39 to 29 Ma, at a rate of 0.24-0.3 km Myr À1 . Moreover, the reset ZHe ages imply significant burial of the samples, by up to 8-10 km in the center of the range. Therefore, the Alpine exhumation phase was significant, and synchronous to the main phase of exhumation in the central Pyrenees, although exhumation rates were an order of magnitude lower. Three-dimensional thermokinematic modeling of the data confirms the timing of uplift of this area, but its resolution is limited by the relatively small number of reset ages over a large area.

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The transition from thick-skinned to thin-skinned tectonics in the Basque-Cantabrian Pyrenees: the Burgalesa Platform and surroundings

Cited by 41 publications

References 79 publications

Basement structure of the Hontomín CO<sub>2</sub> storage site (Spain) determined by integration of microgravity and 3-D seismic data

Basement structure of the Hontomín CO<sub>2</sub> storage site (Spain) determined by integration of microgravity and 3-D seismic data

Influence of rift basin geometry on the subsequent postrift sedimentation and basin inversion: The Organyà Basin and the Bóixols thrust sheet (south central Pyrenees)

Alpine exhumation of the central Cantabrian Mountains, Northwest Spain

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The transition from thick-skinned to thin-skinned tectonics in the Basque-Cantabrian Pyrenees: the Burgalesa Platform and surroundings

Cited by 41 publications

References 79 publications

Basement structure of the Hontomín CO&lt;sub&gt;2&lt;/sub&gt; storage site (Spain) determined by integration of microgravity and 3-D seismic data

Basement structure of the Hontomín CO&lt;sub&gt;2&lt;/sub&gt; storage site (Spain) determined by integration of microgravity and 3-D seismic data

Influence of rift basin geometry on the subsequent postrift sedimentation and basin inversion: The Organyà Basin and the Bóixols thrust sheet (south central Pyrenees)

Alpine exhumation of the central Cantabrian Mountains, Northwest Spain

Contact Info

Product

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Basement structure of the Hontomín CO<sub>2</sub> storage site (Spain) determined by integration of microgravity and 3-D seismic data

Basement structure of the Hontomín CO<sub>2</sub> storage site (Spain) determined by integration of microgravity and 3-D seismic data