Tectonothermal evolution of the northeastern Cantabrian zone (Spain)

Blanco-Ferrera, Silvia; Sanz-López, Javier; García-López, Susana; Bastida, Fernando

doi:10.1007/s00531-016-1365-5

Cited by 9 publications

(4 citation statements)

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“…Two typical strain patterns were recognized around this late‐orogenic structure, depending on their position within or at the limbs of the arc. The core of the arc (i.e., the Cantabrian Zone) is characterized by contractional structures, such as arc‐radial folds and steep E‐W striking thrusts (e.g., Bahamonde et al., 2007; Blanco‐Ferrera et al., 2017; García‐López et al., 2018; Merino‐Tomé et al., 2009; Pastor‐Galán et al., 2014; Pérez‐Estaún et al., 1988, Figure 1). To the contrary, the branches of the arc (e.g., Armorican Massif, Central Iberian Zone) exhibit arc‐parallel stretching, accommodated by both lateral wrenching and extension (e.g., Authemayou et al., 2019; Díez Fernández & Pereira, 2017; Gapais et al., 2015; Martínez Catalán et al., 2007).…”

Section: Introductionmentioning

confidence: 99%

Strain Partitioning Within Bending Orogens, New Insights From the Variscan Belt (Chiroulet‐Lesponne Domes, Pyrenees)

et al. 2021

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The Variscan crust of Pyrenees documents vertical strain partitioning: lateral flow vs uppercrust thickening in the core of Pangea -We document horizontal strain partitioning between extensional and compressional domains during plate-scale oroclinal bending Accepted ArticleThis article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as

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Section: Introductionmentioning

confidence: 99%

Strain Partitioning Within Bending Orogens, New Insights From the Variscan Belt (Chiroulet‐Lesponne Domes, Pyrenees)

et al. 2021

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“…7 indicate that the very low-to-low-grade metamorphism located in the southern Ponga area is part of a major E-W band that crosscuts the main Variscan structures in the eastern CZ. This involves a southwards increase of the metamorphic grade in all the units, in some cases with a thermal gradient well defined, such as that shown by the coal rank and vitrinite reflectance in the Central Coal Basin (Piedad-Sánchez et al 2004;Colmenero et al 2008) and by CAI data in the Picos de Europa unit (Blanco-Ferrera et al 2017). The width of this band appears to be narrower in the Ponga unit, while it covers large areas of the Pisuerga-Carrión and Valsurvio units to the east and of the Central Coal Basin to the west (Fig.…”

Section: Discussion: the Metamorphism Of The Ponga Unit In The Region...mentioning

confidence: 89%

“…1). In the Picos the Europa unit, CAI values indicate that paleotemperatures increase progressively southwards, and ancaizonal conditions are reached in the southern part of the unit (Bastida et al 2004;Blanco-Ferrera et al 2017) (terminology by García-López et al 2001 is used for the metamorphic zonation from CAI data). This ancaizonal area passes without thermal discontinuity through the Picos de Europa basal thrust to the Pisuerga-Carrión unit, where diagenetic/diacaizonal and epizonal/epicaizonal areas also appear.…”

Section: Introductionmentioning

confidence: 99%

Tectonothermal analysis of a major unit of the Cantabrian Zone: the Ponga unit (Variscan belt, NW Spain)

García-López

Voldman

Bastida

et al. 2018

Int J Earth Sci (Geol Rundsch)

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The paleothermometric evolution of the Ponga unit at the core of the Cantabrian Zone, the arcuate foreland fold and thrust belt of the Variscan orogen in NW Spain, is analyzed using the conodont Color Alteration Index and the Kübler Index of illite. The results indicate that the distribution of the thermal maturity patterns is independent of the stratigraphy and the structure of the unit. These include the occurrence of dominant diagenetic values and very low-to-low-grade metamorphism in the southern area. The main thermal event is interpreted to be related to hydrothermal fluids ascending through late-Variscan extensional faults. The anomalous high heat flow in the southern sector of the Ponga unit is part of a previously identified large band in the Cantabrian Zone, where the common occurrence of low-grade metamorphic rocks, hydrothermal dolostones, and ore mineralizations is related to an extensional orogenic episode that started near the Carboniferous-Permian boundary, soon after the closure of the Asturian arc.

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“…Recently, a map of the distribution of the colour alteration index of conodonts in the Picos de Europa unit was done through a 1‐km network grid (Blanco‐Ferrera, ; Blanco‐Ferrera, Sanz‐López, García‐López, & Bastida, ). This map allowed to recognize an area where conodont samples showed stratigraphic inconsistencies in the faunal assemblages and age with respect to the information included in the current geological maps (Martínez García et al, ; Merino‐Tomé et al, ).…”

Section: Introductionmentioning

confidence: 99%

Discovery of aMississippian–earlyBashkirian carbonate platform coeval with condensed cephalopod limestone sedimentation inNW Spain

2018

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A new Mississippian to early Bashkirian shallow‐water carbonate platform, the Valdediezma Limestone, is identified in the central–eastern part of the Picos de Europa tectonic unit of the Cantabrian Mountains. The oldest beds (probably late Tournaisian or early Viséan) are faulted above middle Cambrian rocks. Biostratigraphy based on conodont and foraminiferal faunas allows to differentiate the Viséan–early Bashkirian Valdediezma Limestone from younger Bashkirian and Moscovian shallow‐water platforms previously described in the same area (Valdeteja and Picos de Europa formations). The Valdediezma Limestone recorded the rapid growth of a carbonate platform contemporaneous to the extended sedimentation of the Mississippian condensed, cephalopod‐bearing, nodular carbonates of the Alba Formation in the adjacent deep‐water basin. The growth of the platform continued during the late Serpukhovian and early Bashkirian, when deep‐water carbonates of the Barcaliente Formation were deposited in a geographically restricted foreland basin, and siliciclastic deposits filled the foredeep in the south‐western margin of the Cantabrian Mountains. A sedimentary hiatus from the early Bashkirian to the late Moscovian occurs above the Valdediezma Limestone. The exhumed and eroded platform was buried by late Moscovian to Kasimovian strata when the Variscan deformation affected the Picos de Europa unit. The Valdediezma Limestone was deposited on an isolated platform that rarely is preserved in South Europe, where contemporary shallow‐water carbonates were eroded and reworked into the synorogenic siliciclastic deposits of flysch‐type facies.

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Tectonothermal evolution of the northeastern Cantabrian zone (Spain)

Cited by 9 publications

References 60 publications

Strain Partitioning Within Bending Orogens, New Insights From the Variscan Belt (Chiroulet‐Lesponne Domes, Pyrenees)

Strain Partitioning Within Bending Orogens, New Insights From the Variscan Belt (Chiroulet‐Lesponne Domes, Pyrenees)

Tectonothermal analysis of a major unit of the Cantabrian Zone: the Ponga unit (Variscan belt, NW Spain)

Discovery of aMississippian–earlyBashkirian carbonate platform coeval with condensed cephalopod limestone sedimentation inNW Spain

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