The Catalan magnetic anomaly: Its significance for the crustal structure of the Gulf of Lion passive margin and relationship to the Catalan transfer zone

Canva, Albane; Thinon, Isabelle; Peyrefitte, A.; Couëffé, Renaud; Maillard, Agnès; Jolivet, Laurent; Martelet, Guillaume; Lacquement, Frédéric; Guennoc, Pol

doi:10.1016/j.marpetgeo.2019.104174

Cited by 14 publications

(19 citation statements)

References 94 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Further, the deformation described in this article, mainly distributed but also localized along NE-SW and NW-SE faults, could contribute to the crustal thinning. Related to this geodynamic, it is possible that an intrusive magmatic body as recently evidenced by gravimetric and magnetic anomalies along the Catalan Transfer Zone [Canva et al, 2020], could exist bellow the study area. It would be a source of abnormal heat flow at the base of the crust favoring the hydrothermal system.…”

Section: Geodynamic Implicationsmentioning

confidence: 83%

“…The hydrothermal system of the Têt Valley (Eastern Pyrénées, France, Figure 1) is an orogenic-belt related hydrothermal system, where basement rock lithologies (gneisses, granites, metasediments) are deformed by both ductile shear zones and brittle faults resulting from a polyphase tectonic history (Hercynian and Pyrenean compression, Neogene extension). The link between the Neogene deformations [Calvet, 1999;Goula et al, 1999] and the thinning of the crust in the Eastern Pyrénées remain unclear and is currently discussed [Mauffret et al, 2001;Nercessian et al, 2001;Gunnell et al, 2008;Chevrot et al, 2018;Diaz et al, 2018;Wehr et al, 2018;Canva et al, 2020;Jolivet et al, 2020]. Moreover, it is also unclear how meteoric water infiltrates deep enough to attain a temperature of 80 to 130°C [Taillefer et al, 2018].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Polyphased brittle deformation around a crustal fault: A multi-scale approach based on remote sensing and field data on the mountains surrounding the Têt hydrothermal system (Eastern Pyrénées, France)

et al. 2021

View full text Add to dashboard Cite

Highlights1. Geological features of adjacent mountains that allow the hydrothermal circulation.2. The Têt fault system was formed during recent and polyphased tectonic stages.3. Plio-Quaternary brittle faulting is widely distributed and reactivates oldest faults. 4. Fracture opening at depth are favored in crystalline rocks than in metasediments.5. Fault intersections with background fracturing provide pathways for hydrothermal fluids.

show abstract

Section: Geodynamic Implicationsmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Polyphased brittle deformation around a crustal fault: A multi-scale approach based on remote sensing and field data on the mountains surrounding the Têt hydrothermal system (Eastern Pyrénées, France)

et al. 2021

View full text Add to dashboard Cite

show abstract

“…This Rupelian change in stress orientation reflects a change at plate boundaries, which we relate to the onset of subduction roll-back and back-arc rifting above the Apennine subduction (Réhault et al, 1984;Séranne, 1999;Jolivet and Faccenna, 2000;Jolivet et al, 2015;Romagny et al, 2020). Southeasttrending transfer faults zones are a distinctive feature of the rifting of the Gulf of Lion (Gorini et al, 1993;Guennoc et al, 2000;Mauffret et al, 2001;Canva et al, 2020;Maillard et al, 2020). However, there is no evidence of active SE-oriented structure in the onshore study area, until the Oligocene rifting episode (Maerten and Séranne, 1995;Sanchis and Séranne, 2000).…”

Section: Regional Synthesis and Discussionmentioning

confidence: 99%

The transition from Pyrenean shortening to Gulf of Lion rifting in Languedoc (South France) – A tectonic-sedimentation analysis

Séranne¹,

Couëffé²,

Husson³

et al. 2021

BSGF - Earth Sci. Bull.

Self Cite

View full text Add to dashboard Cite

The Pyrenean orogen extended eastward, across the present-day Gulf of Lion margin. The late or post-orogenic dismantling of this orogen segment, contemporaneous with ongoing shortening in the Spanish Pyrénées, is still debated. Understanding the transition between the two geodynamic events requires to document the precise timing of the succession of the tectonic processes involved. We investigate the superposition of rifting structures over Pyrenean thrusts and folds in the onshore Languedoc. Compilation and reassessment of the regional chronostratigraphy, in the light of recent biostratigraphic dating and new mapping of Paleogene basins, lead to date the transition to the Priabonian. Tectonic-sedimentation relationship in the Eocene to Oligocene depocentres are analysed in surface exposures as well as in seismic reflection surveys. Bed-to bed mapping allowed us to: i) characterise an intermediate sequence of Priabonian age, bounded at the base and the top by unconformities; ii) evidence syn-depositional deformation within the Priabonian; iii) define the axes of Priabonian deformation. Interpretation of seismic reflection profiles, across the onshore basins covered by syn- and post-rift sequences, reveals the existence of an intermediate sequence displaying similar features, and that is correlated to the Priabonian. Syn-depositional deformation of some Priabonian basins correspond to extensional structure, whereas neighbouring, contemporaneous basins, reveal compressional deformation. The distribution of such apparently conflicting observations across the studied area provides evidence for left-lateral strike-slip deformation between two major regional faults (Cévennes and Nîmes faults). Left-lateral strike-slip along NE-trending faults accommodates E-W extension of the West European Rift (ECRIS) and part of the ongoing N-S shortening in the Central and Western Pyrénées. Priabonian clastic sedimentation and deformation in Languedoc witness the initial stages of the dismantling of the Languedoc-Provence Pyrénées, prior to Oligocene-Aquitanian back-arc rifting.

show abstract

“…It makes a striking difference with the Gulf of Lion margin where little volcanic material is observed. Canva et al (2020), however, showed that the prominent Catalan magnetic anomaly is best explained by the underplating of mafic material (gabbros) underneath the crust in the vicinity of the Catalan transfer zone (Figs. 18 and 19).…”

Section: Depth-dependent Extension During Back-arc Riftingmentioning

confidence: 99%

Geodynamic evolution of a wide plate boundary in the Western Mediterranean, near-fieldversusfar-field interactions

Jolivet

Baudin

Calassou

et al. 2021

BSGF - Earth Sci. Bull.

Self Cite

View full text Add to dashboard Cite

The present-day tectonic setting of the Western Mediterranean region, from the Pyrénées to the Betics and from the Alps to the Atlas, results from a complex 3-D geodynamic evolution involving the interactions between the Africa, Eurasia and Iberia plates and asthenospheric mantle dynamics underneath. In this paper, we review the main tectonic events recorded in this region since the Early Cretaceous and discuss the respective effects of far-field and near-field contributions, in order to unravel the origin of forces controlling crustal deformation. The respective contributions of mantle-scale, plate-scale and local processes in the succession of tectonic stages are discussed. Three periods can be distinguished: (1) the first period (Tethyan Tectonics), from 110 to 35 Ma, spans the main evolution of the Pyrenean orogen and the early evolution of the Betics, from rifting to maximum shortening. The rifting between Iberia and Europe and the subsequent progressive formation of new compressional plate boundaries in the Pyrénées and the Betics, as well as the compression recorded all the way to the North Sea, are placed in the large-scale framework of the African and Eurasian plates carried by large-scale mantle convection; (2) the second period (Mediterranean Tectonics), from 32 to 8 Ma, corresponds to a first-order change in subduction dynamics. It is most typically Mediterranean with a dominant contribution of slab retreat and associated mantle flow in crustal deformation. Mountain building and back-arc basin opening are controlled by retreating and tearing slabs and associated mantle flow at depth. The 3-D interactions between the different pieces of retreating slabs are complex and the crust accommodates the mantle flow underneath in various ways, including the formation of metamorphic core complexes and transfer fault zones; (3) the third period (Late-Mediterranean Tectonics) runs from 8 Ma to the Present. It corresponds to a new drastic change in the tectonic regime characterized by the resumption of N-S compression along the southern plate boundary and a propagation of compression toward the north. The respective effects of stress transmission through the lithospheric stress-guide and lithosphere-asthenosphere interactions are discussed throughout this period.

show abstract

The Catalan magnetic anomaly: Its significance for the crustal structure of the Gulf of Lion passive margin and relationship to the Catalan transfer zone

Cited by 14 publications

References 94 publications

Polyphased brittle deformation around a crustal fault: A multi-scale approach based on remote sensing and field data on the mountains surrounding the Têt hydrothermal system (Eastern Pyrénées, France)

Polyphased brittle deformation around a crustal fault: A multi-scale approach based on remote sensing and field data on the mountains surrounding the Têt hydrothermal system (Eastern Pyrénées, France)

The transition from Pyrenean shortening to Gulf of Lion rifting in Languedoc (South France) – A tectonic-sedimentation analysis

Geodynamic evolution of a wide plate boundary in the Western Mediterranean, near-fieldversusfar-field interactions

Contact Info

Product

Resources

About