34 results on '"Cadenas, Patricia"'
Search Results
2. Permian-Triassic Rifting Stage
- Author
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López-Gómez, José, Alonso-Azcárate, Jacinto, Arche, Alfredo, Arribas, José, Fernández Barrenechea, José, Borruel-Abadía, Violeta, Bourquin, Sylvie, Cadenas, Patricia, Cuevas, Julia, De la Horra, Raúl, Díez, José Bienvenido, Escudero-Mozo, María José, Fernández-Viejo, Gabriela, Galán-Abellán, Belén, Galé, Carlos, Gaspar-Escribano, Jorge, Gisbert Aguilar, José, Gómez-Gras, David, Goy, Antonio, Gretter, Nicola, Heredia Carballo, Nemesio, Lago, Marceliano, Lloret, Joan, Luque, Javier, Márquez, Leopoldo, Márquez-Aliaga, Ana, Martín-Algarra, Agustín, Martín-Chivelet, Javier, Martín-González, Fidel, Marzo, Mariano, Mercedes-Martín, Ramón, Ortí, Federico, Pérez-López, Alberto, Pérez-Valera, Fernando, Pérez-Valera, Juan Alberto, Plasencia, Pablo, Ramos, Emilio, Rodríguez-Méndez, Lidia, Ronchi, Ausonio, Salas, Ramón, Sánchez-Fernández, David, Sánchez-Moya, Yolanda, Sopeña, Alfonso, Suárez-Rodríguez, Ángela, Tubía, José María, Ubide, Teresa, Valero Garcés, Blas, Vargas, Henar, Viseras, César, Oberhänsli, Roland, Series Editor, de Wit, Maarten J., Series Editor, Roure, François M., Series Editor, Quesada, Cecilio, editor, and Oliveira, José Tomás, editor
- Published
- 2019
- Full Text
- View/download PDF
3. (D)rifting in the 21st century: Key processes, natural hazards and geo-resources
- Author
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Zwaan, Frank, primary, Alves, Tiago, additional, Cadenas, Patricia, additional, Gouiza, Mohamed, additional, Phethean, Jordan, additional, Brune, Sascha, additional, and Glerum, Anne, additional
- Published
- 2023
- Full Text
- View/download PDF
4. New lithostratigraphy for the Cantabrian Mountains: A common tectono-stratigraphic evolution for the onset of the Alpine cycle in the W Pyrenean realm, N Spain
- Author
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López-Gómez, José, Martín-González, Fidel, Heredia, Nemesio, de la Horra, Raúl, Barrenechea, José F., Cadenas, Patricia, Juncal, Manuel, Diez, José B., Borruel-Abadía, Violeta, Pedreira, David, García-Sansegundo, Joaquín, Farias, Pedro, Galé, Carlos, Lago, Marceliano, Ubide, Teresa, Fernández-Viejo, Gabriela, and Gand, Georges
- Published
- 2019
- Full Text
- View/download PDF
5. Structure and Tectonic Evolution of the NW Sulu Sea Basin (SE Asia).
- Author
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Cadenas, Patricia and Ranero, César R.
- Subjects
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ISLAND arcs , *SEISMIC reflection method , *SEDIMENTARY basins , *RIFTS (Geology) , *PALEOGENE , *NEOGENE Period , *OCEANIC crust - Abstract
We discuss the tectonic structure, seismic stratigraphy and evolution of the NW Sulu Sea using reprocessed 2D reflection profiles. The NW Sulu Sea is located between the Palawan continental shelf and the Cagayan Ridge and represents the northern part of the Sulu Sea, a marginal sea resulting from Paleogene extension and subsequent Neogene contraction due to convergence between the Palawan and the Philippine blocks. The basin consists of six seismo‐stratigraphic units overlying crystalline basement. Syn‐orogenic depocenters contain calibrated Middle Miocene to, possibly, Lower Miocene units, while rift‐related depocenters consist of uncalibrated but tentatively dated Paleogene to Lower Miocene units. Thickness and depth maps of the main units and bounding horizons differentiate the Piedra‐Blanca and the Rasa domains, separated by the NW‐Sulu‐Break major tectonic structure. Fault‐bounded rift‐related depocenters are strongly segmented. We interpret that NW‐SE and NE‐SW trending zones accommodate shape and trend variations of these depocenters. We suggest that these zones may link rift segments, recording different extensional deformation. Miocene thrusting and folding in the Piedra‐Blanca Domain and mudflow with associated gravitational structures in the Rasa Domain influenced the deposition of syn‐orogenic units. Rift structures inherited from rift segmentation may have conditioned the style and distribution of contractional deformation during the subsequent incipient reactivation during contraction. In the context of SE Asia, our results support that the timing of rifting of the NW Sulu Sea overlaps with the opening of the South China Sea and the North Palawan margin, which may indicate a common geodynamic driving force triggering extension. Plain Language Summary: The SE Asia region includes several basins partially floored by oceanic crust, frequently containing or bounded by volcanic island arcs. These basins are known marginal seas and, although it is critical to decipher the geodynamic evolution of the entire region, the structure and tectonic history of most of these marginal seas are still insufficiently known. The Sulu marginal sea lies between the Sulu Archipelago and the Palawan, Mindanao, Negros and Panay islands. The Cagayan Ridge separates the NW and SE Sulu seas, which show a contrasting seafloor morphology, resulting from Paleogene extension and subsequent Neogene contraction. In this work, we study the structure and tectonic evolution of the NW Sulu Sea based on the re‐processing and interpretation of seismic reflection profiles acquired in 1982 and 1987. We analyzed and calibrated the seismo‐stratigraphy of the sediment infill, determined the main tectonic and gravitational structures and the geometry and spatial distribution of depocenters. Our results show for the first time the basin‐wide overall structure and constrain tectonic models, describing the opening and, particularly, the contractional deformation of the NW Sulu Sea. This provides further information to understand the formation of the Sulu Sea and the evolution of convergent systems in SE Asia. Key Points: A multi‐stage tectonic evolution shaped the Piedra‐Blanca and Rasa structural domains separated by the gentle NW‐Sulu‐Break structureNW‐SE and NE‐SW trending accommodation zones define the geometry and location of the rift‐related oldest basin depocentersThrusts and associated folds deformed the Piedra‐Blanca and mudflows affected the Rasa domain during the contractional basin reactivation [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
6. Offshore seismicity clusters in the West iberian Margin illustrated by two decades of events
- Author
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Fernandez-Viejo, Gabriela, primary, Lopez-Fernandez, Carlos, additional, and Cadenas, Patricia, additional
- Published
- 2023
- Full Text
- View/download PDF
7. (D)rifting in the 21st century: Key processes, natural hazards and geo-resources.
- Author
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Zwaan, Frank, Alves, Tiago, Cadenas, Patricia, Gouiza, Mohamed, Phethean, Jordan, Brune, Sascha, and Glerum, Anne
- Subjects
SCIENTIFIC literature ,RIFTS (Geology) ,RENEWABLE energy transition (Government policy) ,MASS-wasting (Geology) ,SUSTAINABILITY ,HAZARDS ,HAZARD mitigation - Abstract
Rifting and continental break-up is a key research topic within geosciences, and a thorough understanding of the processes involved, as well as of the associated natural hazard and natural resources is of great importance to both science and society. As a result, a large body of knowledge is available in the literature, yet most of previous research focuses on tectonic and geodynamic processes and their links to the evolution of rift systems. However, we believe that the key challenge for researchers is to make our knowledge of rift systems available and applicable to face new societal challenges. In particular, we should embrace a system analysis approach, and aim to apply our knowledge to better understand the links between rift processes, natural hazards, and the geo-resources that are of critical importance to realize the energy transition and a sustainable future. The aim of this paper is therefore to provide a first-order framework for such an approach, by providing an up-to-date summary of rifting processes, hazards, and geo-resources, followed by an assessment of future challenges and opportunities for research. We address the varied terminology used to characterise rifting in the scientific literature, followed by a description of rifting processes with a focus on the impact of (1) rheology and stain rates, (2) inheritance in three dimensions, (3) magmatism, and (4) surface processes. Subsequently, we address the considerable natural hazards and risks that occur in rift settings, which are linked to (I) seismicity, (II) magmatism, and (III) mass wasting, and provide some insights in how the impacts of these hazards can be mitigated. Moreover, we classify and describe the geo-resources occurring in rift environments as (a) non-energy resources, (b) geo-energy resources, (c) water and soils, and (d) opportunities for geological storage. Finally, we discuss the key challenges for the future linked to the aforementioned themes, and identify numerous opportunities for follow-up research and knowledge application. In particular, we see great potential in systematic knowledge transfer and collaboration between researchers, industry partners and government bodies, which may be the key to future successes and advancements. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
8. (D)rifting in the 21st century: Key processes, natural hazards and geo-resources.
- Author
-
Zwaan, Frank, Alves, Tiago, Cadenas, Patricia, Gouiza, Mohamed, Phethean, Jordan, Brune, Sascha, and Glerum, Anne
- Subjects
TWENTY-first century ,SCIENTIFIC literature ,RIFTS (Geology) ,RENEWABLE energy transition (Government policy) ,MASS-wasting (Geology) ,SUSTAINABILITY ,HAZARD mitigation - Abstract
Rifting and continental break-up is a key research topic within geosciences, and a thorough understanding of the processes involved, as well as of the associated natural hazard and natural resources is of great importance to both science and society. As a result, a large body of knowledge is available in the literature, yet most of previous research focuses on tectonic and geodynamic processes and their links to the evolution of rift systems. However, we believe that the key challenge for researchers is to make our knowledge of rift systems available and applicable to face new societal challenges. In particular, 5 we should embrace a system analysis approach, and aim to apply our knowledge to better understand the links between rift processes, natural hazards, and the geo-resources that are of critical importance to realize the energy transition and a sustainable future. The aim of this paper is therefore to provide a first-order framework for such an approach, by providing an up-to-date summary of rifting processes, hazards, and geo-resources, followed by an assessment of future challenges and opportunities for research. We address the varied terminology used to characterise rifting in the scientific literature, followed by a description of 10 rifting processes with a focus on the impact of (1) rheology and stain rates, (2) inheritance in three dimensions, (3) magmatism, and (4) surface processes. Subsequently, we address the considerable natural hazards and risks that occur in rift settings, which are linked to (I) seismicity, (II) magmatism, and (III) mass wasting, and provide some insights in how the impacts of these hazards can be mitigated. Moreover, we classify and describe the geo-resources occurring in rift environments as (a) non-energy resources, (b) geo-energy resources, (c) water and soils, and (d) opportunities for geological storage. Finally, we discuss the 15 key challenges for the future linked to the aforementioned themes, and identify numerous opportunities for follow-up research and knowledge application. In particular, we see great potential in systematic knowledge transfer and collaboration between researchers, industry partners and government bodies, which may be the key to future successes and advancements. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
9. Offshore seismicity clusters in the West Iberian Margin illustrated by 2 decades of events.
- Author
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Fernández-Viejo, Gabriela, López-Fernández, Carlos, and Cadenas, Patricia
- Subjects
PLATE tectonics ,SEISMIC networks ,OCEAN bottom ,OCEANIC crust ,EARTHQUAKES ,GEODYNAMICS - Abstract
An analysis of 2 decades (2003–2022) of seismicity recorded by the Spanish and Portuguese seismic networks along the West Iberian passive margin has resulted in a better understanding of the distribution of moderate seismic activity in this intraplate submarine area. The study provides a precise trend of specific alignments inferred from the density maps of seismicity, giving an accurate depiction of event distribution along two wide stripes that extend for 700 km through the ocean floor in the WNW–ESE direction. These bands are parallel to the Africa–Eurasia plate boundary but are distinctly separated from its related seismicity by approximately 300 and 700 km, respectively. This is a sufficient distance to be considered intraplate activity. When trying to relate this seismicity to structural and geophysical features, a conclusive picture does not emerge. The earthquakes occur indiscriminately across thinned continental, hyperextended, and exhumed mantle rift domains. They fade out in proximity to undisputed oceanic crust, but some events extend beyond. The hypocentral depths signal a considerable number of events nucleating in the upper mantle. The focal mechanisms, although scarce, are predominantly strike-slip. Considering these observations, hypotheses ranging from subduction initiation and development of strained corridors to local structures of the margin are discussed in order to explain this relatively anomalous seismicity. However, some of them lack convincing arguments, while others are too vague. None of them are flawless, suggesting that several factors may be at play. Despite being one of the most probed passive margins in the world, the present geodynamic status of the West Iberian Margin manifested in its modern seismicity remains unknown. Interpreting these data within a global tectonic plate framework, together with the potential addition of seafloor seismometers, may provide the key to understanding this activity along one of the most archetypical margins of the Atlantic Ocean. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
10. Permian-Triassic Rifting Stage
- Author
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López-Gómez, José, primary, Alonso-Azcárate, Jacinto, additional, Arche, Alfredo, additional, Arribas, José, additional, Fernández Barrenechea, José, additional, Borruel-Abadía, Violeta, additional, Bourquin, Sylvie, additional, Cadenas, Patricia, additional, Cuevas, Julia, additional, De la Horra, Raúl, additional, Díez, José Bienvenido, additional, Escudero-Mozo, María José, additional, Fernández-Viejo, Gabriela, additional, Galán-Abellán, Belén, additional, Galé, Carlos, additional, Gaspar-Escribano, Jorge, additional, Gisbert Aguilar, José, additional, Gómez-Gras, David, additional, Goy, Antonio, additional, Gretter, Nicola, additional, Heredia Carballo, Nemesio, additional, Lago, Marceliano, additional, Lloret, Joan, additional, Luque, Javier, additional, Márquez, Leopoldo, additional, Márquez-Aliaga, Ana, additional, Martín-Algarra, Agustín, additional, Martín-Chivelet, Javier, additional, Martín-González, Fidel, additional, Marzo, Mariano, additional, Mercedes-Martín, Ramón, additional, Ortí, Federico, additional, Pérez-López, Alberto, additional, Pérez-Valera, Fernando, additional, Pérez-Valera, Juan Alberto, additional, Plasencia, Pablo, additional, Ramos, Emilio, additional, Rodríguez-Méndez, Lidia, additional, Ronchi, Ausonio, additional, Salas, Ramón, additional, Sánchez-Fernández, David, additional, Sánchez-Moya, Yolanda, additional, Sopeña, Alfonso, additional, Suárez-Rodríguez, Ángela, additional, Tubía, José María, additional, Ubide, Teresa, additional, Valero Garcés, Blas, additional, Vargas, Henar, additional, and Viseras, César, additional
- Published
- 2019
- Full Text
- View/download PDF
11. Intraplate Lithospheric Deformation Forms Large Volcanic Regions
- Author
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Ranero, César R., primary, Gomez de la Peña, Laura, additional, Prada, Manel, additional, Jimenez, Estela, additional, Cadenas, Patricia, additional, Neri, Alejandra, additional, Merino, Irene, additional, Ugalde, Arantza, additional, and Grevemeyer, Ingo, additional
- Published
- 2023
- Full Text
- View/download PDF
12. Two decades of seismicity in the West Iberian Margin: current hypothesis and new ideas
- Author
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Fernandez Viejo, Gabriela, primary, Lopez-Fernandez, Carlos, additional, and Cadenas, Patricia, additional
- Published
- 2023
- Full Text
- View/download PDF
13. How do subduction zones spread over Atlantic-type oceans?
- Author
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Duarte, João C., primary, Riel, Nicolas, additional, Cadenas, Patricia, additional, Rosas, Filipe M., additional, Welford, J. Kim, additional, and Kaus, Boris, additional
- Published
- 2023
- Full Text
- View/download PDF
14. The role of inheritance in forming rifts and rifted margins and building collisional orogens: a Biscay-Pyrenean perspective
- Author
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Manatschal Gianreto, Chenin Pauline, Lescoutre Rodolphe, Miró Jordi, Cadenas Patricia, Saspiturry Nicolas, Masini Emmanuel, Chevrot Sebastien, Ford Mary, Jolivet Laurent, Mouthereau Frédéric, Thinon Isabelle, Issautier Benoit, and Calassou Sylvain
- Subjects
rift system ,reactivation ,inheritance ,orogenic system ,bay of biscay ,pyrenees ,Geology ,QE1-996.5 - Abstract
A long-standing challenge in tectonics is to evaluate the role of inheritance and define the initial conditions of a geodynamic system, which are prerequisites to understand and model its evolution with some accuracy. Here we revisit the concept of “inheritance” by distinguishing “interface shape inheritance”, which includes the transient thermal state and gravitational potential energy, and “persisting inheritance”, which encompasses long-lasting structural and compositional inheritance. This new approach allows us to investigate, at each stage of a Wilson Cycle, the interplay between inheritance (innate/“genetic code”) and the physical processes at play (extension/compression, magmatism etc.). The aim of this paper is to provide a conceptual framework that integrates the role of inheritance in the study of rifts, rifted margins and collisional orogens based on the work done in the OROGEN project, which focuses on the Biscay-Pyrenean system. The Biscay-Pyrenean rift system resulted from a multistage rift evolution that developed over a complex lithosphere pre-structured by the Variscan orogenic cycle. There is a general agreement that the Pyrenean-Cantabrian orogen resulted from the reactivation of an increasingly mature rift system along-strike, ranging from mature rifted margins in the west to an immature and segmented hyperextended rift in the east. However, different models have been proposed to explain the preceding rifting and its influence on the subsequent reactivation. Results from the OROGEN project highlight the sequential reactivation of rift-inherited decoupling horizons and identify the specific role of exhumed mantle, hyperextended and necking domains during compressional reactivation. They also highlight the contrasting fate of rift segment centres versus segment boundaries during convergence, explaining the non-cylindricity of internal parts of collisional orogens. Results from the OROGEN project also suggest that the role of inheritance is more important during the initial stages of collision, which may explain the higher complexity of internal parts of orogenic systems with respect to their external parts. In contrast, when the system involved in the orogeny is more mature, the orogenic evolution is mostly controlled by first-order physical processes as described in the Coulomb Wedge theory, for instance. This may account for the simpler and more continuous architecture of external parts of collisional orogens and may also explain why most numerical models can reproduce mature orogenic architectures with a better accuracy compared to those of initial collisional stages. The new concepts developed from the OROGEN research are now ready to be tested at other orogenic systems that result from the reactivation of rifted margins, such as the Alps, the Colombian cordilleras and the Caribbean, Taiwan, Oman, Zagros or Timor.
- Published
- 2021
- Full Text
- View/download PDF
15. The role of extensional detachment systems in thinning the crust and exhuming granulites: analogies between the offshore Le Danois High and the onshore Labourd Massif in the Biscay/Pyrenean rifts
- Author
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Cadenas Patricia, Lescoutre Rodolphe, Manatschal Gianreto, and Fernández-Viejo Gabriela
- Subjects
extensional detachment system ,crustal thinning ,exhumation ,granulite ,rift segmentation ,bay of biscay/pyrenees ,Geology ,QE1-996.5 - Abstract
Large uncertainties remain about the architecture, timing and role of the structures responsible for high degrees of crustal thinning and the exhumation of mid-crustal granulites in the Pyrenean and Biscay rift systems. Both, the Le Danois High in the North Iberian margin and the Labourd Massif in the Western Pyrenees preserve evidence of extensional detachment faults and include exhumed granulites, which are locally reworked in syn-rift sediments. In this study, we compare the crustal structure and its link to the overlying sediments at the two sites based on the interpretation of high quality 2D seismic reflection profiles offshore and field observations and published geological cross-sections onshore. New reported seismic and field observations support that extensional detachment systems delineate the top basement in the Le Danois High and the Labourd Massif, advocating for a similar tectonic evolution. We propose that the Le Danois and North Mauléon extensional detachment systems were responsible for high degrees of crustal thinning and the exhumation of the pre-rift brittle-ductile transition and associated mid-crustal granulites during Aptian to Cenomanian extension, leading to the formation of the Le Danois and Labourd crustal tapers. Subsequently tilted and uplifted during the Alpine convergence, the two taper blocks lay at present in the hanging-wall of major Alpine thrusts. Their position at overlapping, en-echelon hyperextended rift segments at the end of rifting, and the occurrence of shortcutting structures at depth linking neighbouring rift segments can explain the preservation of the rift-related detachment systems. This study proposes for the first time analogies between the offshore Le Danois High and the onshore Labourd Massif and demonstrates the importance of extensional detachment systems in thinning the crust and exhuming mid-crustal granulites at the seafloor in the Biscay and Pyrenean rift systems during Aptian to Cenomanian extension.
- Published
- 2021
- Full Text
- View/download PDF
16. Offshore seismicity clusters in the West iberian Margin illustrated by two decades of events.
- Author
-
Fernandez-Viejo, Gabriela, Lopez-Fernandez, Carlos, and Cadenas, Patricia
- Subjects
PLATE tectonics ,SEISMIC networks ,OCEAN bottom ,OCEANIC crust ,SUBDUCTION ,SEISMOMETERS - Abstract
An analysis of two decades (2003–2022) of seismicity recorded by the Spanish and Portuguese seismic networks along the West Iberian passive margin has resulted in a better understanding of the distribution of moderate seismic activity in this intraplate submarine area. The study provides a precise trend of specific alignments inferred from the density maps of seismicity, giving an accurate depiction of event distribution along two wide stripes that extend 700 km long through the ocean floor in a WNW-ESE direction. These bands are parallel to the Africa-Eurasia plate boundary but are distinctly separated from its related seismicity by approximately 300 km and 700 km, respectively. This is a sufficient distance to be considered as intraplate activity. When trying to relate this seismicity to structural and geophysical features, a conclusive picture doesn't emerge. The earthquakes occur indiscriminately across thinned continental, hyperextended, and exhumed mantle rift domains. They fade out in the proximity of undisputed oceanic crust, but some events extend beyond. The hypocentral depths signal a considerable amount of events nucleating in the upper mantle. The focal mechanisms, although scarce, are predominantly strike-slip. Considering these observations, hypothesis ranging from subduction initiation, development of strained corridors or local structures of the margin, have been discussed in order to explain this relatively anomalous seismicity. However, some of them do not portray convincing arguments, while others are too unspecific. None of them are flawless, suggesting that several factors may be at play. Despite being one of the most probed passive margins in the world, the present geodynamical status of the West Iberian Margin manifested in its modern seismicity remains unknown. Interpreting this data within a global tectonic plate framework, together with the potential addition of seafloor seismometers, may provide the key to understanding this activity along one of the most archetypical margins of the Atlantic Ocean. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
17. Formation and contractional reactivation of the NW Sulu Sea (SE Asia)
- Author
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Cadenas, Patricia, primary and R. Ranero, César, additional
- Published
- 2022
- Full Text
- View/download PDF
18. Reactivation of a hyperextended rift system: The Basque–Cantabrian Pyrenees case
- Author
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Miró, Jordi, primary, Manatschal, Gianreto, additional, Cadenas, Patricia, additional, and Muñoz, Josep Anton, additional
- Published
- 2021
- Full Text
- View/download PDF
19. A kinematic reconstruction of Iberia using intracontinental strike‐slip corridors
- Author
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Frasca, Gianluca, primary, Manatschal, Gianreto, additional, Cadenas, Patricia, additional, Miró, Jordi, additional, and Lescoutre, Rodolphe, additional
- Published
- 2021
- Full Text
- View/download PDF
20. The unevenness of the north Iberian crustal root, a snapshot of an elusive stage in margin reactivation
- Author
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Fernández-Viejo, Gabriela, primary, Cadenas, Patricia, additional, Acevedo, Jorge, additional, and Llana-Fúnez, Sergio, additional
- Published
- 2021
- Full Text
- View/download PDF
21. The role of inheritance in forming rifts and rifted margins and building collisional orogens: a Biscay-Pyrenean perspective
- Author
-
Manatschal, Gianreto, Chenin, Pauline, Lescoutre, Rodolphe, Miró, Jordi, Cadenas, Patricia, Saspiturry, Nicolas, Masini, Emmanuel, Chevrot, S., Ford, Mary, Jolivet, Laurent, Mouthereau, F., Thinon, Isabelle, Issautier, Benoit, Calassou, Sylvain, and Agencia Estatal de Investigación (España)
- Subjects
Golfe de Gascogne ,Pyrénées ,Inheritance ,Système de rift ,Héritage ,Rift system ,Pyrenees ,Reactivation ,Bay of Biscay ,Réactivation ,Orogenic system ,Système orogénique - Abstract
34 pages, 11 figures [EN] A long-standing challenge in tectonics is to evaluate the role of inheritance and define the initial conditions of a geodynamic system, which are prerequisites to understand and model its evolution with some accuracy. Here we revisit the concept of “inheritance” by distinguishing “interface shape inheritance”, which includes the transient thermal state and gravitational potential energy, and “persisting inheritance”, which encompasses long-lasting structural and compositional inheritance. This new approach allows us to investigate, at each stage of a Wilson Cycle, the interplay between inheritance (innate/“genetic code”) and the physical processes at play (extension/compression, magmatism etc.). The aim of this paper is to provide a conceptual framework that integrates the role of inheritance in the study of rifts, rifted margins and collisional orogens based on the work done in the OROGEN project, which focuses on the Biscay-Pyrenean system. The Biscay-Pyrenean rift system resulted from a multistage rift evolution that developed over a complex lithosphere pre-structured by the Variscan orogenic cycle. There is a general agreement that the Pyrenean-Cantabrian orogen resulted from the reactivation of an increasingly mature rift system along-strike, ranging from mature rifted margins in the west to an immature and segmented hyperextended rift in the east. However, different models have been proposed to explain the preceding rifting and its influence on the subsequent reactivation. Results from the OROGEN project highlight the sequential reactivation of rift-inherited decoupling horizons and identify the specific role of exhumed mantle, hyperextended and necking domains during compressional reactivation. They also highlight the contrasting fate of rift segment centres versus segment boundaries during convergence, explaining the non-cylindricity of internal parts of collisional orogens. Results from the OROGEN project also suggest that the role of inheritance is more important during the initial stages of collision, which may explain the higher complexity of internal parts of orogenic systems with respect to their external parts. In contrast, when the system involved in the orogeny is more mature, the orogenic evolution is mostly controlled by first-order physical processes as described in the Coulomb Wedge theory, for instance. This may account for the simpler and more continuous architecture of external parts of collisional orogens and may also explain why most numerical models can reproduce mature orogenic architectures with a better accuracy compared to those of initial collisional stages. The new concepts developed from the OROGEN research are now ready to be tested at other orogenic systems that result from the reactivation of rifted margins, such as the Alps, the Colombian cordilleras and the Caribbean, Taiwan, Oman, Zagros or Timor [FR] Un défi de longue date en tectonique consiste à évaluer le rôle de l’héritage et à définir les conditions initiales d’un système géodynamique. Ceux-ci sont en effet des prérequis pour comprendre et modéliser l’évolution d’un tel système avec une certaine précision. Nous revisitons ici le concept d’« héritage » en distinguant « l’héritage (transitoire) d’interfaces », qui comprend d’un côté l’état thermique et de l’autre l’énergie potentielle gravitationnelle, et « l’héritage persistant » qui englobe les hétérogénéités structurales et compositionnelles. Cette nouvelle approche permet d’étudier, à chaque étape du Cycle de Wilson, l’interaction entre l’héritage (inné/« code génétique » du système) et les processus physiques en jeu (extension/compression, magmatisme, etc.). Le but de cet article est de fournir un cadre conceptuel qui intègre le rôle de l’héritage dans l’étude des rifts, des marges riftées et des orogènes de collision, à partir des travaux réalisés dans le projet OROGEN dans le système Gascogne-Pyrénées. Le système de rift Gascogne-Pyrénées résulte de plusieurs épisodes extensifs qui ont successivement affecté une lithosphère déjà complexe car pré-structurée par le cycle orogénique Varisque. Il est généralement accepté que l’orogénèse pyrénéo-cantabrique a résulté de la réactivation d’un système de rift dont la maturité varie d’est en ouest, allant de marges conjuguées matures à l’ouest à un rift hyper-étiré, immature et segmenté à l’est. Cependant, différents modèles ont été proposés pour expliquer l’évolution précédant le rifting et son influence sur la réactivation ultérieure. Les résultats du projet OROGEN montrent une réactivation séquentielle des horizons de découplage hérités du rift et identifient le rôle spécifique des domaines de manteau exhumé, d’hyperextension et d’étranglement lors de la réactivation. Ils mettent également en évidence le sort contrasté des centres de segments de rifts par rapport à leurs bordures lors de l’inversion, expliquant la non-cylindricité des parties internes des orogènes de collision. Les résultats du projet OROGEN suggèrent également que le rôle de l’héritage est plus important pendant les étapes initiales de subduction et de collision, ce qui peut expliquer la plus grande complexité des parties internes des systèmes orogéniques par rapport à leurs parties externes. En revanche, quand les systèmes de rift impliqués sont plus matures, l’évolution orogénique est principalement contrôlée par des processus physiques de premier ordre, tels que ceux décrits par la théorie du Prisme de Coulomb. Ce constat pourrait expliquer l’architecture plus simple et plus continue des parties externes des orogènes de collision par rapport à leurs parties internes, et pourrait également expliquer pourquoi la plupart des modèles numériques reproduisent mieux les architectures orogéniques matures que celles des stades initiaux de collision Les nouveaux concepts développés à partir de la recherche menée lors du projet OROGEN sont désormais prêts à être testés sur d’autres systèmes orogéniques résultant de la réactivation de marges riftées, comme les Alpes, la Cordillère colombienne, les Caraïbes, Taiwan, Oman, Zagros ou encore le Timor This study was funded by the Orogen project, a tripartite joint academic-industry research program between the CNRS, BRGM, and Total R&D Frontier Exploration program With the institutional support of the ‘Severo Ochoa Centre of Excellence’ accreditation (CEX2019-000928-S)
- Published
- 2021
22. Investigating the Plate Kinematics of the Bay of Biscay Using Deformable Plate Tectonic Models
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King, Michael T., primary, Welford, J. Kim, additional, Cadenas, Patricia, additional, and Tugend, Julie, additional
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- 2021
- Full Text
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23. Extensional detachments related to extreme crustal thinning and their fate during contractional reactivation: the Le Danois-North Mauléon offshore-onshore examples in north Iberia
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Cadenas, Patricia, primary, Lescoutre, Rodolphe, additional, and Manatschal, Gianreto, additional
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- 2021
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24. The importance of Iberia for the restoration of the Mesozoic Alpine Tethys
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Frasca, Gianluca, primary, Manatschal, Gianreto, additional, Cadenas, Patricia, additional, Mirò, Jordi, additional, and Lescoutre, Rodolphe, additional
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- 2021
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25. Investigating the plate kinematics of continental blocks and their role on the deformation experienced along the Iberia-Eurasia plate boundary using deformable plate tectonic models
- Author
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King, Michael, primary, Welford, Kim, additional, Cadenas, Patricia, additional, and Tugend, Julie, additional
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- 2021
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26. The Basque-Cantabrian Basin: a natural laboratory to study the reactivation of a hyperextended system
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Miro Padrisa, Jordi, primary, Cadenas, Patricia, additional, Lescoutre, Rodolphe, additional, Muñoz, Josep Anton, additional, and Manatschal, Gianreto, additional
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- 2020
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27. The architecture and the multi-stage evolution of the North Iberian margin (Bay of Biscay)
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Cadenas, Patricia, primary, Manatschal, Gianreto, additional, and Fernández-Viejo, Gabriela, additional
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- 2020
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28. Assessment of the continuity of the orogenic root beneath the Cantabrian-Pyrenean orogen
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Fernández-Viejo, Gabriela, primary, Cadenas, Patricia, additional, Acevedo, Jorge, additional, and Llana-Funez, Sergio, additional
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- 2020
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29. How much confidence can be conferred on tectonic maps of continental shelves? The Cantabrian-Fault case
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Fernández-Viejo Gabriela, Cadenas Patricia, López-Fernández Carlos, and Domínguez-Cuesta María José
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geography ,Multidisciplinary ,geography.geographical_feature_category ,Continental shelf ,Submarine canyon ,Induced seismicity ,Strike-slip tectonics ,Bioinformatics ,Article ,Stress field ,Tectonics ,Bay ,Geology ,Seismology ,Submarine landslide - Abstract
The Cantabrian Fault is a long-lived crustal fault, 320 km long on land and extending more than 150 km seawards within the Bay of Biscay, which separates different geodynamic domains. Due to its sub-vertical dip and late strike slip movement is poorly evidenced in the shelf and it has been traditionally mapped following the strike of the deepest submarine canyon in the north Atlantic (~4.600 m drop). Based on multichannel reflection data, seismicity from a thirty year period, a GIS model, and the support of detailed field mapping onshore, the fault has been traced more accurately. Surprisingly, it presents a much more E-W strike than mapped before, and shows a splay fault termination never previously assessed. Moreover, the fault acts as a seismic barrier within the actual stress field of Iberia. Collaterally, a large submarine landslide (2000 km(2)) associated with its seismicity has been discovered, providing a further argument to support the newly proposed trace of the fault.
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- 2014
30. The Asturian Basin within the North Iberian margin (Bay of Biscay): seismic characterisation of its geometry and its Mesozoic and Cenozoic cover
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Cadenas, Patricia, primary and Fernández-Viejo, Gabriela, additional
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- 2016
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31. The Asturian Basin within the North Iberian margin (Bay of Biscay): seismic characterisation of its geometry and its Mesozoic and Cenozoic cover.
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Cadenas, Patricia and Fernández‐Viejo, Gabriela
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SEDIMENTARY basins , *SURFACE morphology , *STRATIGRAPHIC geology , *STRUCTURAL geology - Abstract
The distribution and structure of the Mesozoic and Cenozoic cover within the central part of the North Iberian Margin (Bay of Biscay) is analysed based on a dense set of 2D seismic reflection lines and logs. The integration of well data allows the recognition of seven seismostratigraphic units and the construction of a surface that illustrates the 3D morphology of this area at the time of the Jurassic rifting. The study zone comprises what is known as Le Danois Bank, a basement high, and the Asturian Basin, one of the sedimentary basins originated during the Iberian rifting at the end of the Paleozoic. Its development continued with the oceanisation of the Bay of Biscay as a failed arm of the Atlantic rift; later, during the Cenozoic, a drastic change in tectonic regime induced the partial closure of Biscay and building up the Cantabrian−Pyrenean chain along the northern border of Iberia. This compressional period left its imprint in the Asturian Basin sediments in the form of a mild inversion and general uplift. The geometry of the basin bottom appears as an asymmetric bowl thinning out towards the edges, with a main E-W depocenter, separated by E-W striking faults from a secondary one. Those bounding faults show twisted trends in the north, interpreted as a consequence of the compressional period, when a transfer zone in a N-S direction formed between the two E-W striking deformation fronts in Biscay. This study shows that the transfer zone extends further to the west, reaching the longitude of Le Danois Bank. The maximum thickness of the filling within the Asturian Basin is estimated in more than 10 km, deeper than assessed in previous studies. The recognition of frequent halokynetic structures at this longitude is another observation worth to remark. Based on this study, it is suggested that the basin formed on top of a distal basement block of stretched crust limiting with the hyperextended rifted domain of Biscay. This location largely conditioned its deformation during the late compression. [ABSTRACT FROM AUTHOR]
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- 2017
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32. The buffering effect of a continental block on the reactivation of a hyperthinned rift basin: the Asturian Basin and the Le Danois High in the southern Bay of Biscay.
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Cadenas, Patricia, Fernández-Viejo, Gabriela, and Manatschal, Gianreto
- Subjects
- *
GEOLOGIC faults , *BAYS - Published
- 2018
33. Margin segmentation due to strain localization during polyphase rifting in the south-western Bay of Biscay.
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Cadenas, Patricia, Fernández-Viejo, Gabriela, Manatschal, Gianreto, Welford, J.Kim, and Pulgar, Javier A.
- Subjects
- *
GEOLOGIC faults , *BAYS , *RIFTS (Geology) - Published
- 2018
34. Crustal thickening during early stages of reactivation of a hyperextended margin: the crustal root beneath the Cantabrian Mountains.
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Cadenas, Patricia, Fernández-Viejo, Gabriela, and Manatschal, Gianreto
- Subjects
- *
MOUNTAINS , *THEATER - Published
- 2018
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