The MARCONI reflection seismic data: A view into the eastern part of the Bay of Biscay

Fernández‐Viejo, Gabriela; Gallastegui, J.; Pulgar, J. A.; Muset, Josep Gallart

doi:10.1016/j.tecto.2010.06.020

Cited by 31 publications

(48 citation statements)

References 30 publications

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“…6) and a trench that reaches a depth of ~5000 m. Nevertheless, oceanic subduction has been elusive in seismic surveys, as a clear image of a subducted slab has failed to appear either in transverse reflection profiles such as the IAM-12, ESCIN-3-1 and ESCIN-4 ( Fig. 1), which image well the continental margin above (Alvarez-Marrón et al, 1997), or in the more recent MARCONI profiles presented by Fernández-Viejo et al (2011) and Roca et al (2011). The only likely image of an oceanic slab plunging south into the mantle is provided by a set of inclined 3D subcrustal reflections in the strike-subparallel ESCIN-3-2 and 3-3 seismic profiles ( Fig.…”

Section: Results For the Bay Of Biscaymentioning

confidence: 99%

“…1). The MARCONI profiles image the structure of the offshore sedimentary basins and intervening highs (Ferrer et al, 2008;Fernández-Viejo et al, 2011;Roca et al, 2011), but do not bring new key elements into the knowledge of the deep crust and Moho discontinuity. Coincident wide-angle/refraction data acquired with OBS and land stations are presented in Ruiz et al (2017), and largely coincide with earlier ESCIN wide-angle results.…”

Section: The Marconi Surveys In the Bay Of Biscaymentioning

confidence: 99%

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Crustal structure and evolution of the Pyrenean-Cantabrian belt: A review and new interpretations from recent concepts and data

et al. 2018

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International audienceThis paper provides a synthesis of current data and interpretations on the crustal structure of the Pyrenean-Cantabrian orogenic belt, and presents new tectonic models for representative transects. The Pyrenean orogeny lasted from Santonian (~84 Ma) to early Miocene times (~20 Ma), and consisted of a spatial and temporal succession of oceanic crust/exhumed mantle subduction, rift inversion and continental collision processes at the Iberia-Eurasia plate boundary. A good coverage by active-source (vertical-incidence and wide-angle reflection) and passive-source (receiver functions) seismic studies, coupled with surface data have led to a reasonable knowledge of the present-day crustal architecture of the Pyrenean-Cantabrian belt, although questions remain. Seismic imaging reveals a persistent structure, from the central Pyrenees to the central Cantabrian Mountains, consisting of a wedge of Eurasian lithosphere indented into the thicker Iberian plate, whose lower crust is detached and plunges northwards into the mantle. For the Pyrenees, a new scheme of relationships between the southern upper crustal thrust sheets and the Axial Zone is here proposed. For the Cantabrian belt, the depth reached by the N-dipping Iberian crust and the structure of the margin are also revised.The common occurrence of lherzolite bodies in the northern Pyrenees and the seismic velocity and potential field record of the Bay of Biscay indicate that the precursor of the Pyrenees was a hyperextended and strongly segmented rift system, where narrow domains of exhumed mantle separated the thinned Iberian and Eurasian continental margins since the Albian-Cenomanian. The exhumed mantle in the Pyrenean rift was largely covered by a Mesozoic sedimentary lid that had locally glided along detachments in Triassic evaporites. Continental margin collision in the Pyrenees was preceded by subduction of the exhumed mantle, accompanied by the pop-up thrust expulsion of the off-scraped sedimentary lid above. To the west, oceanic subduction of the Bay of Biscay under the North Iberian margin is supported by an upper plate thrust wedge, gravity and magnetic anomalies, and 3D inclined sub-crustal reflections. However, discrepancies remain for the location of continent-ocean transitions in the Bay of Biscay and for the extent of oceanic subduction. The plate-kinematic evolution during the Mesozoic, which involves issues as the timing and total amount of opening, as well as the role of strike-slip drift, is also under debate, discrepancies arising from first-order interpretations of the adjacent oceanic magnetic anomaly record

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Section: Results For the Bay Of Biscaymentioning

confidence: 99%

Section: The Marconi Surveys In the Bay Of Biscaymentioning

confidence: 99%

Crustal structure and evolution of the Pyrenean-Cantabrian belt: A review and new interpretations from recent concepts and data

et al. 2018

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“…Teixell (1996Teixell ( , 1998) consigned a shortening decrease to 80 km near the Arzacq-West Pyrenees ECORS seismic profile (Daignières et al 1994;Masini et al 2015). Further W, shortening appears to be further reduced along the MARCONI Deep Seismic Reflection Survey, too (Fernández-Viejo et al 2011;Roca et al 2011).…”

Section: Discussionmentioning

confidence: 97%

“…This comprises onshore and offshore segments of the Arzacq-Parentis rift systems (Jammes et al 2009(Jammes et al , 2010Masini et al 2015) and, westwards, the Cantabrian submerged margin of the Iberian microplate. This ensemble is currently considered as made of hyper-extended rifted domains, thinned lower continental crust, exhumed subcontinental mantle and oceanic crust (Boillot and Malod 1988;Fernández Viejo et al 2011;Roca et al 2011;Tugend et al 2014).…”

Section: The Geological Mapping Background Of the Basque-cantabrian Bmentioning

confidence: 99%

Geologic map of the Basque-Cantabrian Basin and a new tectonic interpretation of the Basque Arc

Ábalos

2016

Int J Earth Sci (Geol Rundsch)

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“…27.1. Seismic line across a growth ramp anticline (North Iberian Atlantic margin, Bay of Biscay) (slightly modified from Fern andez-Viejo et al, 2010) showing pre-, post-, and growth strata. Most of the growth strata overlap the fold crest.…”

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confidence: 99%

2D Kinematic Models of Growth Fault‐Related Folds in Contractional Settings

Poblet

2011

Tectonics of Sedimentary Basins

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This chapter attempts to synthesize current understanding of various aspects of sedimentation and tectonics at the scale of fault-related folds with associated growth strata developed in contractional settings by using 2D kinematic models. The principal points are to examine the influence of various parameters in the growth stratal architecture in order to help choose the correct model for each circumstance within the wide range of possibilities, and to show what type of data may be obtained from the analysis of growth strata. The knowledge of growth stratal features should facilitate a better understanding of the geometry and evolution of structures, and can therefore benefit society from the perspective of helping hydrocarbon, mining, and groundwater subsurface exploration, and assessing earthquake hazards and underground storage.

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The MARCONI reflection seismic data: A view into the eastern part of the Bay of Biscay

Cited by 31 publications

References 30 publications

Crustal structure and evolution of the Pyrenean-Cantabrian belt: A review and new interpretations from recent concepts and data

Crustal structure and evolution of the Pyrenean-Cantabrian belt: A review and new interpretations from recent concepts and data

Geologic map of the Basque-Cantabrian Basin and a new tectonic interpretation of the Basque Arc

2D Kinematic Models of Growth Fault‐Related Folds in Contractional Settings

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