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https://doi.org/10.5194/se-12-1515-2021
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https://doi.org/10.5194/se-12-1515-2021
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the Creative Commons Attribution 4.0 License.
Research article
| 
06 Jul 2021
Research article |
| 06 Jul 2021
| 06 Jul 2021
Evolution of the Iberian Massif as deduced from its crustal thickness and geometry of a mid-crustal (Conrad) discontinuity
Geology Department, Salamanca University, Salamanca 37008, Spain
José Ramón Martínez Catalán
Geology Department, Salamanca University, Salamanca 37008, Spain
Ana Martínez García
Geosciences Barcelona, CSIC, Lluis Solé i Sabaris, Barcelona
08028, Spain
Juan Alcalde
Geosciences Barcelona, CSIC, Lluis Solé i Sabaris, Barcelona
08028, Spain
Juvenal Andrés
Geology Department, Salamanca University, Salamanca 37008, Spain
Geosciences Barcelona, CSIC, Lluis Solé i Sabaris, Barcelona
08028, Spain
José Fernando Simancas
Geodynamics Department, Granada University, Granada 18071, Spain
Immaculada Palomeras
Geology Department, Salamanca University, Salamanca 37008, Spain
David Martí
Geosciences Barcelona, CSIC, Lluis Solé i Sabaris, Barcelona
08028, Spain
Lithica SCCL, Santa Coloma de Farners, Girona 17430,
Spain
Irene DeFelipe
Geosciences Barcelona, CSIC, Lluis Solé i Sabaris, Barcelona
08028, Spain
Chris Juhlin
Department of Earth Sciences, Uppsala University,
Uppsala 75236, Sweden
Ramón Carbonell
Geosciences Barcelona, CSIC, Lluis Solé i Sabaris, Barcelona
08028, Spain
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Cited articles
Alcock, J. E., Martínez Catalán, J. R., Arenas, R., and Díez
Montes, A.: Use of thermal modeling to assess the tectono-metamorphic
history of the Lugo and Sanabria gneiss domes, Northwest Iberia, Bull.
Soc. Geol. Fr., 180, 179–197, https://doi.org/10.2113/gssgfbull.180.3.179, 2009.
Alcock, J. E., Martínez Catalán, J. R., and Arenas, R.: One- and
two-dimensional models are equally effective in monitoring the crust's
thermal response to advection by large-scale thrusting during orogenesis,
Comput. Geosci., 37, 1205–1207, https://doi.org/10.1016/j.cageo.2011.02.012, 2011.
Alcock, J. E., Martínez Catalán, J. R., Rubio Pascual, F. J.,
Díez Montes, A., Díez Fernández, R., Gómez Barreiro, J.,
Arenas, R., Dias da Silva, Í., and González Clavijo, E.: 2-D thermal
modeling of HT-LP metamorphism in NW and Central Iberia: Implications for
Variscan magmatism, rheology of the lithosphere and orogenic evolution,
Tectonophysics, 657, 21–37, https://doi.org/10.1016/j.tecto.2015.05.022, 2015.
Alonso, J. L.: Sequences of thrusts and displacement transfer in the
superposed duplexes of the Esla Nappe Region (cantabrian zone, nw spain), J.
Struct. Geol., 9, 969–983, https://doi.org/10.1016/0191-8141(87)90005-8, 1987.
Alonso, J. L., Marcos, A., and Suárez, A.: Paleogeographic inversion
resulting from large out of sequence breaching thrusts: The León Fault
(Cantabrian zone, NW Iberia). A new picture of the external Variscan thrust
belt in the Ibero-Armorican arc, Geol. Acta, 7, 451–473,
https://doi.org/10.1344/105.000001449, 2009.
Álvarez-Marrón, J., Pérez-Estaún, A., Dañobeitia, J. J.,
Pulgar, J. A., Martínez Catalán, J. R., Marcos, A., Bastida, F.,
Ayarza, P., Aller, J., Gallart, A., González-Lodeiro, F., Banda, E.,
Comas, M. C., and Córdoba, D.: Seismic structure of the northern
continental margin of Spain from ESCIN deep seismic profiles,
Tectonophysics, 264, 153–174, https://doi.org/10.1016/S0040-1951(96)00124-2, 1996.
Andrés, J., Draganov, D., Schimmel, M., Ayarza, P., Palomeras, I., Ruiz,
M., and Carbonell, R.: Lithospheric image of the Central Iberian Zone
(Iberian Massif) using global-phase seismic interferometry, Solid Earth,
10, 1937–1950, https://doi.org/10.5194/se-10-1937-2019, 2019.
Andrés, J., Ayarza, P., Schimmel, M., Palomeras, I., Ruiz, M., and
Carbonell, R.: What can seismic noise tell us about the Alpine reactivation
of the Iberian Massif? An example in the Iberian Central System, Solid
Earth, 11, 2499–2513, https://doi.org/10.5194/se-11-2499-2020, 2020.
Arenas, R., Farias, P., Gallastegui, G., Gil Ibarguchi, I., González
Lodeiro, F., Klein, E., Marquínez, J., Martín Parra, L. M.,
Martínez Catalán, J. R., Ortega, E., de Pablo Maciá, J. G.,
Peinado, M., and Rodriguez Fernández, L. R.: Características
geológicas y significado de los dominios que componen la Zona de
Galicia-Trás-os- Montes. Simposio sobre Cinturones Orogénicos, in
Simposio sobre Cinturones Orogénicos, II cogreso Geológico de
España, SGE, 75–84, 1988.
Arenas, R., Martínez Catalán, J. R., Martínez Sánchez, S.,
Díaz García, F., Abati, J., Fernández-Suárez, J.,
Andonaegui, P., and Gómez-Barreiro, J.: Paleozoic ophiolites in the
Variscan suture of Galicia (northwest Spain): Distribution, characteristics,
and meaning, Mem. Geol. Soc. Am., 200, 425–444,
https://doi.org/10.1130/2007.1200(22), 2007.
Artemieva, I.: Continental Crust, Geophysics and Geochemestry, Vol. II
– Encyclopedia of Earth and Atmospheric Sciences in the Global Encyclopedia
of Life Support Systems, UNESCO, 2009.
Ayarza, P., Martínez Catalán, J. R., Gallart, J., Pulgar, J. A., and
Dañobeitia, J. J.: Estudio Sismico de la Corteza Ibérica Norte 3: A seismic image of the Variscan crust in the hinterland of the NW Iberian
Massif, Tectonics, 17, 171–186, 1998.
Ayarza, P., Martínez Catalán, J. R., Alvarez-Marrón, J., Zeyen,
H., and Juhlin, C.: Geophysical constraints on the deep structure of a
limited ocean-continent subduction zone at the North Iberian Margin,
Tectonics, 23, TC1010, https://doi.org/10.1029/2002TC001487, 2004.
Azor, A., Lodeiro, F. G., and Simancas, J. F.: Tectonic evolution of the
boundary between the Central Iberian and Ossa-Morena zones (Variscan belt,
southwest Spain), Tectonics, 13, 45–61, https://doi.org/10.1029/93TC02724, 1994.
Azor, A., Rubatto, D., Simancas, J. F., González Lodeiro, F.,
Martínez Poyatos, D., Martin Parra, L. M., and Matas, J.: Rheic Ocean
ophiolitic remnants in southern Iberia questioned by SHRIMP U-Pb zircon ages
on the Beja-Acebuches amphibolites, Tectonics, 27, 1–11,
https://doi.org/10.1029/2008TC002306, 2008.
Bandrés, A., Eguíluz, L., Pin, C., Paquette, J. L.,
Ordóñez, B., Le Fèvre, B., Ortega, L. A., and Gil Ibarguchi, J.
I.: The northern Ossa-Morena Cadomian batholith (Iberian Massif): Magmatic
arc origin and early evolution, Int. J. Earth Sci., 93, 860–885,
https://doi.org/10.1007/s00531-004-0423-6, 2004.
Barbero, L.: Granulite-facies metamorphism in the Anatectic Complex of
Toledo, Spain: late Hercynian tectonic evolution by crustal extension, J.
Geol. Soc. Lond., 152, 365–382, https://doi.org/10.1144/gsjgs.152.2.0365, 1995.
Birps (British Institutions Reflection Profiling Syndicate) and Ecors (Etude De La Croûte Continentale Et Océanique Par Réflexion Et Réfraction Sismique): Deep
seismic reflection profiling between England, France and Ireland, J.-Geol. Soc., 143, 45–52, https://doi.org/10.1144/gsjgs.143.1.0045, 1986.
Bortfeld, R. K.: First results and preliminary interpretation of deep-
reflection seismic recordings along profile DEKORP 2-South (FRG), J.
Geophys.-Z. Geophys., 57, 137–163, 1985.
Braid, J. A., Brendan Murphy, J., Quesada, C., and Mortensen, J.: Tectonic
escape of a crustal fragment during the closure of the Rheic Ocean: U-Pb
detrital zircon data from the late Palaeozoic Pulo do Lobo and South
Portuguese zones, Southern Iberia, J. Geol. Soc. Lond., 168, 383–392,
https://doi.org/10.1144/0016-76492010-104, 2011.
Braid, J. A., Murphy, J. B., Quesada, C., Bickerton, L., and Mortensen, J.
K.: Probing the composition of unexposed basement, South Portuguese Zone,
southern Iberia: Implications for the connections between the Appalachian
and Variscan orogens, Can. J. Earth Sci., 49, 591–613,
https://doi.org/10.1139/E11-071, 2012.
Butler, R. W. H. and Mazzoli, S.: Styles of continental contraction: A
review and introduction, Spec. Pap. Geol. Soc. Am., 414, 1–10,
https://doi.org/10.1130/2006.2414(01), 2006.
Capdevila, R., Boillot, G., Lepvrier, C., Malod, J. A., and Mascle, G.: Les
formations cristallines du Banc Le Danois (marge nord-ibérique), CR
Acad. Sci. Paris, D, 291, 317–320,
1980.
Carbonell, R. and Smithson, S. B.: Large-scale anisotropy within the crust
in the Basin and Range province, Geology, 19, 698–701,
1991.
Carbonell, R., Simancas, J. F., Juhlin, C., Pous, J., Pérez-Estaún,
A., Gonzalez-Lodeiro, F., Munoz, G., Heise, W., and Ayarza, P.: Geophysical
evidence of a mantle derived intrusion in SW Iberia, Geophys. Res. Lett.,
31, 1–4, 2004.
Carracedo, M., Paquette, J. L., Alonso Olazabal, A., Santos Zalduegui, J.
F., de García de Madinabeitia, S., Tiepolo, M., and Gil Ibarguchi, J.
I.: U-Pb dating of granodiorite and granite units of the Los Pedroches
batholith. Implications for geodynamic models of the southern Central
Iberian Zone (Iberian Massif), Int. J. Earth Sci., 98, 1609–1624,
https://doi.org/10.1007/s00531-008-0317-0, 2009.
Carvalho, D.: The metallogenetic consequences of plate tectonics and the
upper Paleozoic evolution of southern Portugal, Estud. Notas e Trab. S. F. M., Servico de Fomento Mineiro,
20, 297–320, 1972.
Casquet, C., Galindo, C., Tornos, F., Velasco, F., and Canales, A.: The
Aguablanca Cu-Ni ore deposit (Extremadura, Spain), a case of synorogenic
orthomagmatic mineralization: Age and isotope composition of magmas (Sr, Nd)
and ore (S), Ore Geol. Rev., 18, 237–250,
https://doi.org/10.1016/S0169-1368(01)00033-6, 2001.
Chopra, S. and Alexeev, V.: Application of texture attribute analysis to 3D
seismic data, Soc. Explor. Geophys. – 75th SEG Int. Expo. Annu. Meet. SEG
2005, 30, 767–770, https://doi.org/10.1190/1.2144439, 2005.
Conrad, V.: Laufzeitkurven des Tauernbens vom 28, Mitt. Erdb. Komm. WIen
Akad. Wiss., 59, 1–23, 1925.
Cook, F. A.: Fine structure of the continental reflection Moho, Bull. Geol.
Soc. Am., 114, 64–79, https://doi.org/10.1130/0016-7606(2002)114<0064:FSOTCR>2.0.CO;2, 2002.
Corretgé, L. G. and Suárez, O.: Cantabrian and Palentian Zones.
Igneous Rocks, in: Pre-Mesozoic Geology of Iberia, edited by: Dallmeyer, R. D.
and Martínez García, E., Springer-Verlag, Berlin, 72–79,
1990.
Dallmeyer, R. D. and Quesada, C.: Cadomian vs. Variscan evolution of the
Ossa-Morena zone (SW Iberia): field and 40Ar/39Ar mineral age constraints,
Tectonophysics, 216, 339–364, https://doi.org/10.1016/0040-1951(92)90405-U, 1992.
Dallmeyer, R. D., Martínez Catalán, J. R., Arenas, R., Gil
Ibarguchi, J. I., Gutiérrez-Alonso, G., Farias, P., Bastida, F., and
Aller, J.: Diachronous Variscan tectonothermal activity in the NW Iberian
Massif: Evidence from 40Ar
DeFelipe, I., Pedreira, D., Pulgar, J. A., van der Beek, P. A., Bernet, M.,
and Pik, R.: Unraveling the Mesozoic and Cenozoic Tectonothermal Evolution
of the Eastern Basque-Cantabrian Zone–Western Pyrenees by Low-Temperature
Thermochronology, Tectonics, 38, 3436–3461, https://doi.org/10.1029/2019TC005532,
2019.
DeFelipe, I., Alcalde, J., Ivandic, M., Martí, D., Ruiz, M., Marzán, I., Diaz, J., Ayarza, P., Palomeras, I., Fernandez-Turiel, J.-L., Molina, C., Bernal, I., Brown, L., Roberts, R., and Carbonell, R.: Reassessing the lithosphere: SeisDARE, an open-access seismic data repository, Earth Syst. Sci. Data, 13, 1053–1071, https://doi.org/10.5194/essd-13-1053-2021, 2021.
DEKORP Research Group: Results of deep reflection seismic profiling in the
Oberpfalz (Bavaria), Geophys. J. R. Astron. Soc., 89, 353–360,
https://doi.org/10.1111/j.1365-246X.1987.tb04430.x, 1987.
de Vicente, G., Giner, J. L., Muñoz-Martí, A., González-Casado,
J. M., and Lindo, R.: Determination of present-day stress tensor and
neotectonic interval in the Spanish Central System and Madrid Basin, central
Spain, Tectonophysics, 266, 405–424,
https://doi.org/10.1016/S0040-1951(96)00200-4, 1996.
Dias, R. and Ribeiro, A.: The Ibero-Armorican Arc: A collision effect
against an irregular continent?, Tectonophysics, 246, 113–128,
https://doi.org/10.1016/0040-1951(94)00253-6, 1995.
Díaz Azpiroz, M., Fernández, C., Castro, A., and El-Biad, M.:
Tectonometamorphic evolution of the Aracena metamorphic belt (SW Spain)
resulting from ridge-trench interaction during Variscan plate convergence,
Tectonics, 25, 1–20, https://doi.org/10.1029/2004TC001742, 2006.
Díez Balda, M. A., Martínez Catalán, J. R., and Ayarza, P.:
Syn-collisional extensional collapse parallel to the orogenic trend in a
domain of steep tectonics: the Salamanca Detachment Zone (Central Iberian
Zone, Spain), J. Struct. Geol., 17, 163–182,
https://doi.org/10.1016/0191-8141(94)E0042-W, 1995.
Díez Montes, A., Martínez Catalán, J. R., and Bellido Mulas,
F.: Role of the Ollo de Sapo massive felsic volcanism of NW Iberia in the
Early Ordovician dynamics of northern Gondwana, Gondwana Res., 17,
363–376, https://doi.org/10.1016/j.gr.2009.09.001, 2010.
Ehsan, S. A., Carbonell, R., Ayarza, P., Martí, D.,
Pérez-Estaún, A., Martínez-Poyatos, D. J., Simancas, J. F.,
Azor, A., and Mansilla, L.: Crustal deformation styles along the reprocessed
deep seismic reflection transect of the Central Iberian Zone (Iberian
Peninsula), Tectonophysics, 621, 159–174, https://doi.org/10.1016/j.tecto.2014.02.014,
2014.
Ehsan, S. A., Carbonell, R., Ayarza, P., Martí, D., Martínez
Poyatos, D., Simancas, J. F., Azor, A., Ayala, C., Torné, M., and
Pérez-Estaún, A.: Lithospheric velocity model across the Southern
Central Iberian Zone (Variscan Iberian Massif): The ALCUDIA wide-angle
seismic reflection transect, Tectonics, 34, 535–554,
https://doi.org/10.1002/2014TC003661, 2015.
Expósito, I., Simancas, J. F., and Lodeiro, F. G.: Estructura de la mitad
septentrional de la zona de Ossa-Morena: Deformación en el bloque
inferior de un cabalgamiento cortical de evolución compleja:
Deformación en el bloque inferior de un cabalgamiento cortical de
evolución compleja, Rev. la Soc. Geológica España, 15, 3–14,
2002.
Expósito, I., Simancas, J. F., González Lodeiro, F., Bea, F.,
Montero, P., and Salman, K.: Metamorphic and deformational imprint of
Cambrian – Lower Ordovician rifting in the Ossa-Morena Zone (Iberian Massif,
Spain), J. Struct. Geol., 25, 2077–2087,
https://doi.org/10.1016/S0191-8141(03)00075-0, 2003.
Farias, P., Gallastegui, G., González Lodeiro, F., Marquinez, J.,
Martín-Parra, L. M., Martínez Catalán, J. R., and
Pablo-Maciá, J. G.: “Aportaciones al conocimiento de la
litoestratigrafia y estructura de Galicia Central”, Memórias da Fac.
Ciências, Univ. do Porto, 1, 411–431, 1987.
Fernández-Suárez, J., Gutiérrez-Alonso, G., Jenner, G. A., and
Jackson, S. E.: Geochronology and geochemistry of the Pola de Allande
granitoids (northern Spain): their bearing on the Cadomian-Avalonian
evolution of northwest Iberia, Can. J. Earth Sci., 35, 1439–1453,
https://doi.org/10.1139/cjes-35-12-1439, 1998.
Fernández-Viejo, G., Gallart, J., Pulgar, J. A., Gallastegui, J.,
Dañobeitia, D., and Córdoba, D.: Crustal transition between
continental and oceanico domains along the North Iberian margin from wide
angle seismic and gravity data, Geophys. Res. Lett., 25, 4249–4252,
1998.
Fernández-Viejo, G., Gallart, J., Pulgar, A., Córdoba, D., and
Dañobeitia, J. J.: Seismic signature of Variscan and Alpine tectonics in
NW Iberia: Crustal structure of the Cantabrian Mountains and Duero Basin, J.
Geophys. Res., 105, 3001–3018, 2000.
Fianco, C. B., França, G. S., Albuquerque, D. F., Vilar, C. da S., and
Argollo, R. M.: Using the receiver function for studying earth deep
structure in the Southern Borborema Province, J. South Am. Earth Sci.,
94, 102221, https://doi.org/10.1016/j.jsames.2019.102221, 2019.
Finlayson, D. M., Collins, C. D. N., and Lock, J.: P-wave velocity features
of the lithosphere under the Eromanga Basin, Eastern Australia, including a
prominent MID-crustal (Conrad?) discontinuity, Tectonophysics, 101,
267–291, https://doi.org/10.1016/0040-1951(84)90117-3, 1984.
Flecha, I., Palomeras, I., Carbonell, R., Simancas, J. F., Ayarza, P.,
Matas, J., González-Lodeiro, F., and Pérez-Estaún, A.: Seismic
imaging and modelling of the lithosphere of SW-Iberia, Tectonophysics,
472, 148–157, https://doi.org/10.1016/j.tecto.2008.05.033, 2009.
Franke, W.: The mid-European segment of the Variscides: Tectonostratigraphic
units, terrane boundaries and plate tectonic evolution, Geol. Soc. Spec.
Publ., 179, 35–56, https://doi.org/10.1144/GSL.SP.2000.179.01.05, 2000.
Franke, W., Bortfeld, R. K., Brix, M., Drozdzewski, G., Dürbaum, H. J.,
Giese, P., Janoth, W., Jödicke, H., Reichert, C., Scherp, A., Schmoll,
J., Thomas, R., Thünker, M., Weber, K., Wiesner, M. G., and Wong, H. K.:
Crustal structure of the Rhenish Massif: results of deep seismic reflection
lines Dekorp 2-North and 2-North-Q, Geol. Rundschau, 79, 523–566,
https://doi.org/10.1007/BF01879201, 1990.
Gallastegui, J., Pulgar, J. A., and Alvarez-Marrón, J.: 2-D seismic
modeling of the Variscan foreland thrust and fold belt crust in NW Spain
from ESCIN-1 deep seismic reflection data, Tectonophysics, 269,
21–32, https://doi.org/10.1016/S0040-1951(96)00166-7, 1997.
Gallastegui, J., Pulgar, J. A., and Gallart, J.: Alpine tectonic wedging and
crustal delamination in the Cantabrian Mountains (NW Spain), Solid Earth,
7, 1043–1057, https://doi.org/10.5194/se-7-1043-2016, 2016.
García Casquero, J. L., Boelrijk, N. A. I. M., Chacón, J., and
Priem, H. N. A.: Rb-Sr evidence for the presence of Ordovician gsranites in
the deformed basement of the Badajoz-Córdoba belt, SW Spain, Geol.
Rundschau, 74, 379–384, https://doi.org/10.1007/BF01824904, 1985.
Gardien, V., Arnaud, N., and Desmurs, L.: Petrology and ar-ar dating of
granulites from the galicia bank (spain): African craton relics in western
europe, Geodin. Acta, 13, 103–117,
https://doi.org/10.1080/09853111.2000.11105367, 2000.
Gómez-Pugnaire, M. T., Azor, A., Fernández-Soler, J. M., and
López Sánchez-Vizcaíno, V.: The amphibolites from the
Ossa-Morena/Central Iberian Variscan suture (Southwestern Iberian Massif):
Geochemistry and tectonic interpretation, Lithos, 68, 23–42,
https://doi.org/10.1016/S0024-4937(03)00018-5, 2003.
Gómez Barreiro, J., Martínez Catalán, J. R., Arenas, R.,
Castiñeiras, P., Abati, J., Díaz García, F., and Wijbrans, J.
R.: Tectonic evolution of the upper allochthon of the Órdenes complex (northwestern Iberian Massif): Structural constraints to a polyorogenic
peri-Gondwanan terrane, Geol. Soc. Am. Spec. Pap., 423, 315–332,
https://doi.org/10.1130/2007.2423(15), 2007.
Hernández Enrile, J. L.: Extensional tectonics of the toledo
ductile-brittle shear zone, central Iberian Massif, Tectonophysics,
191, 311–324, https://doi.org/10.1016/0040-1951(91)90064-Y, 1991.
Hobbs, B. E., Ord, A., Regenauer-Lieb, K., and Drummond, B.: Fluid reservoirs
in the crust and mechanical coupling between the upper and lower crust,
Earth, Planets Sp., 56, 1151–1161, https://doi.org/10.1186/BF03353334, 2004.
Julivert, M., Fontboté, M., Ribeiero, A., and Conde, L. E.: Mapa
tectónico de la Península Ibérica y Baleares Notas Incluye
mapa: Unidades estructurales de la Península Ibérica, Escala 1:
1 000 000, Instituto Geológico y Minero de España, 1972.
Klemperer, S. L., Hauge, T. A., Hauser, E. C., Oliver, J. E., and Potter, C.
J.: The Moho in the northern Basin and Range Province, Nevada, along the
COCORP 40∘ N seismic- reflection transect, Geol. Soc. Am. Bull.,
97, 603–618, https://doi.org/10.1130/0016-7606(1986)97<603:TMITNB>2.0.CO;2, 1986.
Kossmat, F.: Gliederung des varistischen Gebirgsbaues. Abhandlungen des
Sächsischen, in: Abhandlungen des Sächsischen Geologuschen
Landesamts, edited by: des S. G. Landesamts, A., Leipzig, Heft 1, 1–39,
1927.
Levander, A. R. and Holliger, K.: Small-scale heterogeneity and large-scale
velocity structure of the continental crust, J. Geophys. Res., 97,
8797–8804, https://doi.org/10.1029/92JB00659, 1992.
Linnemann, U., Pereira, M. F., Jeffries, T. E., Drost, K., and Gerdes, A.:
The Cadomian Orogeny and the opening of the Rheic Ocean: The diacrony of
geotectonic processes constrained by LA-ICP-MS U-Pb zircon dating
(Ossa-Morena and Saxo-Thuringian Zones, Iberian and Bohemian Massifs),
Tectonophysics, 461, 21–43, https://doi.org/10.1016/j.tecto.2008.05.002, 2008.
Litak, R. K. and Brown, L. D.: A modern perspective on the Conrad
Discontinuity, Eos, Trans. Am. Geophys. Union, 70, 713–725,
https://doi.org/10.1029/89EO00223, 1989.
López Sánchez-Vizcaíno, V., Gómez-Pugnaire, M. T., Azor, A.,
and Fernández-Soler, J. M.: Phase diagram sections applied to
amphibolites: A case study from the Ossa-Morena/Central Iberian Variscan
suture (Southwestern Iberian Massif), Lithos, 68, 1–21,
https://doi.org/10.1016/S0024-4937(03)00017-3, 2003.
Lotze, F.: Stratigraphie und Tektonik des Keltiberischen Grundgebirges
(Spanien), Abhandlungen Gesellschaft der Wissenschaften zu Göttingen,
Abhandlungen der Gesellschaft der Wissenschaften in Göttingen, Mathematisch-Physikalische Klasse, 14, 143–162, 1929.
Maggini, M. and Caputo, R.: Sensitivity analysis for crustal rheological
profiles: Examples from the Aegean region, Ann. Geophys., 63, 1–29,
https://doi.org/10.4401/ag-8244, 2020.
Martínez Catalán, J. R.: Are the oroclines of the Variscan belt
related to late Variscan strike-slip tectonics?, Terra Nov., 23,
241–247, https://doi.org/10.1111/j.1365-3121.2011.01005.x, 2011.
Martínez Catalán, J. R.: The Central Iberian arc, an orocline
centered in the Iberian Massif and some implications for the Variscan belt,
Int. J. Earth Sci., 101, 1299–1314, https://doi.org/10.1007/s00531-011-0715-6, 2012.
Martínez Catalán, J. R., Ayarza, P., Pulgar, J. A.,
Pérez-Estaún, A., Gallart, J., Marcos, A., Bastida, F.,
Álvarez-Marrón, J., González Lodeiro, F., Aller, J.,
Dañobeitia, J. J., Banda, E., Córdoba, D., and Comas, M. C.: Results
from the ESCIN-N3.3 marine deep seismic profile along the Cantabrian
continental margin, Rev. Soc. Geol. España, 8, 341–354, 1995.
Martínez Catalán, J. R., Fernández-Suárez, J., Jenner, G.
A., Belousova, E., and Díez Montes, A.: Provenance constraints from
detrital zircon U–Pb ages in the NW Iberian Massif: implications for
Palaeozoic plate configuration and Variscan evolution, J. Geol. Soc.
Lond., 161, 463–476, https://doi.org/10.1144/0016-764903-054, 2004.
Martínez Catalán, J. R., Arenas, R., Díagarcía, F.,
González Cuadra, P., Gómez-Barreiro, J., Abati, J., Castiñeiras,
P., Fernández-Suárez, J., Sánchez Martínez, S., Andonaegui,
P., González Clavijo, E., Díez Montes, A., Rubio Pascual, F. J., and
Valle Aguado, B.: Space and time in the tectonic evolution of the
northwestern Iberian Massif: Implications for the Variscan belt, Mem. Geol.
Soc. Am., 200, 403–423, https://doi.org/10.1130/2007.1200(21), 2007.
Martínez Catalán, J. R., Álvarez Lobato, F., Pinto, V.,
Gómez Barreiro, J., Ayarza, P., Villalaín, J. J., and Casas, A.:
Gravity and magnetic anomalies in the allochthonous rdenes Complex (Variscan
belt, northwest Spain): Assessing its internal structure and thickness,
Tectonics, 31, 1–18, https://doi.org/10.1029/2011TC003093, 2012.
Martínez Catalán, J. R., Rubio Pascual, F. J., Díez Montes,
A., Díez Fernández, R., Gómez Barreiro, J., Dias da Silva,
Í., González Clavijo, E., Ayarza, P., and Alcock, J. E.: The late
Variscan HT/LP metamorphic event in NW and Central Iberia: relationships to
crustal thickening, extension, orocline development and crustal evolution,
Geol. Soc. Lond. Spec. Publ., 405, 225–247, https://doi.org/10.1144/SP405.1, 2014.
Martínez Catalán, J. R., Díez Balda, M. A., Escuder Viruete,
J., Villar Alonso, P., Ayarza, P., Gonalez Clavijo, E., and Dïez Montes,
A.: Cizallamientos dúctiles de escala regional en la provincia de
Salamanca, in: Geo-Guias: Rutas Geológicas por la Península
Ibérica, Canarias, Sicilia y Marruecos, edited by: Diaz Azpiroz, M.,
Exposito Ramos, I., Llana Fúnez, S., and Bauluz Lázaro, B.,
Sociedad Geológica de España, 109–118, 2019.
Martínez García, A.: Seismic characterization and geodynamic
significane of the mid-crustal discontinuity across the Variscan Iberia,
Universidad de Barcelona, Master Th., 31 pp., 2019.
Martínez García, E.: El Paleozoico de la Zona Cantabrica Oriental
(Noroeste de España), Trab. Geol., 11, 95–127, 1981.
Martínez Poyatos, D., Carbonell, R., Palomeras, I., Simancas, J. F.,
Ayarza, P., Martí, D., Azor, A., Jabaloy, A., González Cuadra, P.,
Tejero, R., Martín Parra, L. M., Matas, J., González Lodeiro, F.,
Pérez-Estaún, A., García Lobón, J. L., and Mansilla, L.:
Imaging the crustal structure of the Central Iberian Zone (Variscan Belt):
The ALCUDIA deep seismic reflection transect, Tectonics, 31, 1–21,
https://doi.org/10.1029/2011TC002995, 2012.
Martínez Poyatos, D. J.: Estructura del borde meridional de la Zona
Centroibérica y su relación con el contacto entre las Zonas
Centroibérica y de Ossa-Morena, in: Serie Nova Terra, 18, edited by:
de Laxe, L. X., Instituto Universitario de Xeoloxía, A Coruña,
Spain, p. 295, 2002.
Matte, P.: The Variscan collage and orogeny (480–290 Ma) and the tectonic
definition of the Armorica microplate: a review – Matte – 2003 – Terra Nova
– Wiley Online Library, Terra Nov., 13, 122–128,
2001.
Matte, P. and Ribeiro, A.: Forme et orientation de l'ellipsoïde de
déformation dans la virgation hercynienne de Galice, Relations avec le
plissement et hypothèses sur la genèse de l'arc
ibéro-armoricain, Comptes Rendus l'Académie des Sci, 280,
2825–2828, 1975.
Meissner, R.: Rupture, creep, lamellae and crocodiles: happenings in the
continental crust, Terra Nov., 1, 17–28,
https://doi.org/10.1111/j.1365-3121.1989.tb00321.x, 1989.
Meissner, R., Rabbel, W., and Kern, H.: Seismic lamination and anisotropy of
the lower continental crust, Tectonophysics, 416, 81–99,
https://doi.org/10.1016/j.tecto.2005.11.013, 2006.
Melekhova, E., Schlaphorst, D., Blundy, J., Kendall, J. M., Connolly, C.,
McCarthy, A., and Arculus, R.: Lateral variation in crustal structure along
the Lesser Antilles arc from petrology of crustal xenoliths and seismic
receiver functions, Earth Planet. Sc. Lett., 516, 12–24,
https://doi.org/10.1016/j.epsl.2019.03.030, 2019.
Montero, P., Bea, F., González-Lodeiro, F., Talavera, C., and Whitehouse,
M. J.: Zircon ages of the metavolcanic rocks and metagranites of the Ollo de
Sapo Domain in central Spain: Implications for the Neoproterozoic to Early
Palaeozoic evolution of Iberia, Geol. Mag., 144, 963–976,
https://doi.org/10.1017/S0016756807003858, 2007.
Ochsner, A.: U-Pb geochronology of the Upper Proterozoic-Lower Paleozoic
geodynamic evolution in the Ossa-Morena Zone (SW Iberia): constraints on the
timing of the Cadomian orogeny, University of Zurich, Diss. ETH10, PhD, 192, 261 pp.,
1993.
Okaya, D., Rabbel, W., Beilecke, T., and Hasenclever, J.: P wave material
anisotropy of a tectono-metamorphic terrane: An active source seismic
experiment at the KTB super-deep drill hole, southeast Germany, Geophys.
Res. Lett., 31, 1–4, https://doi.org/10.1029/2004GL020855, 2004.
Oliveira, J. T.: Part VI: South Portuguese Zone, stratigraphy and
synsedimentary tectonism, in: Pre-Mesozoic Geology of Iberia, edited by:
Dallmeyer, R. D. and Martínez García, E., Springer,
Berlin, Germany, 334–347, 1990.
Oncken, O.: Orogenic mass transfer and reflection seismic patterns –
Evidence from DEKORP sections across the European variscides (central
Germany), Tectonophysics, 286, 47–61,
https://doi.org/10.1016/S0040-1951(97)00254-0, 1998.
Palomeras, I., Carbonell, R., Flecha, I., Simancas, J. F., Ayarza, P.,
Matas, J., Poyatos, D. M., Azor, A., Lodeiro, F. G., and
Pérez-Estaún, A.: Nature of the lithosphere across the Variscan
orogen of SW Iberia: Dense wide-angle seismic reflection data, J. Geophys.
Res.-Sol. Ea., 114, 1–29, 2009.
Palomeras, I., Carbonell, R., Ayarza, P., Martí, D., Brown, D., and
Simancas, J. F.: Shear wave modeling and Poisson's ratio in the Variscan
Belt of SW Iberia, Geochem. Geophy. Geosy., 12, 1–23,
https://doi.org/10.1029/2011GC003577, 2011.
Palomeras, I., Villaseñor, A., Thurner, S., Levander, A., Gallart, J.,
and Harnafi, M.: Lithospheric strcuture of Iberia and Morocco using
finite-frequency Rayleigh wave tomogrpahy from earthquakes and seismic
ambient noise, Geochem. Geophy. Geosy., 18, 1824–1840,
https://doi.org/10.1002/2016GC006657, 2017.
Palomeras, I., Ayarza, P., Andrés, J., Álvarez-Valero, A., Gómez-Barreiro, J., Díaz, J., Alcalde, J., and Carbonell, R.: Mapping and Interpreting the Uppermost Mantle Reflectivity Beneath Central and South-West Iberia, J. Geophys. Res.-Sol. Ea., 126, e2020JB019987, https://doi.org/10.1029/2020JB019987, 2021.
Pedreira, D., Pulgar, J. A., Gallart, J., and Díaz, J.: Seismic evidence
of Alpine crustal thickening and wedging from the western Pyrenees to the
Cantabrian Mountains (north Iberia), J. Geophys. Res., 108, 1–21,
https://doi.org/10.1029/2001JB001667, 2003.
Pereira, M. F., Ribeiro, C., Vilallonga, F., Chichorro, M., Drost, K.,
Silva, J. B., Albardeiro, L., Hofmann, M., and Linnemann, U.: Variability
over time in the sources of South Portuguese Zone turbidites: Evidence of
denudation of different crustal blocks during the assembly of Pangaea, Int.
J. Earth Sci., 103, 1453–1470, https://doi.org/10.1007/s00531-013-0902-8, 2014.
Pérez-Cáceres, I., Martínez Poyatos, D., Simancas, J. F., and
Azor, A.: The elusive nature of the Rheic Ocean suture in SW Iberia,
Tectonics, 34, 2429–2450, https://doi.org/10.1002/2015TC003947, 2015.
Pérez-Cáceres, I., Simancas, J. F., Martínez Poyatos, D., Azor,
A., and González Lodeiro, F.: Oblique collision and deformation
partitioning in the SW Iberian Variscides, Solid Earth, 7, 857–872,
https://doi.org/10.5194/se-7-857-2016, 2016.
Pérez-Estaún, A., Bastida, F., Alonso, J. L., Marquínez, J.,
Aller, J., Alvarez-Marrón, J., Marcos, A., and Pulgar, J. A.: A
thin-skinned tectonics model for an arcuate fold and thrust belt: The
Cantabrian Zone (Variscan Ibero-Armorican Arc), Tectonics, 7, 517–537,
https://doi.org/10.1029/TC007i003p00517, 1988.
Pérez-Estaún, A., Bastida, F., Martínez Catalán, J.R.
Gutierrez Marco, J. C., Marcos, A., and Pulgar, J.: West Asturian-Leonese
Zone. Stratigraphy, in: Pre-Mesozoic Geology of Iberia, edited by:
Dallmeyer, R. D. and Martínez Garcia, E., Springer-Verlag,
Berlin, 92–102, 1990.
Pérez-Estaún, A., Martínez Catalán, J. R., and Bastida, F.:
Crustal thickening and deformation sequence in the footwall to the suture of
the Variscan belt of northwest Spain, Tectonophysics, 191, 243–253,
https://doi.org/10.1016/0040-1951(91)90060-6, 1991.
Pérez-Estaún, A., Pulgar, J. A., Banda, E., and Alvarez-Marrón,
J.: Crustal structure of the external variscides in northwest spain from
deep seismic reflection profiling, Tectonophysics, 232, 91–118,
https://doi.org/10.1016/0040-1951(94)90078-7, 1994.
Pin, C., Fonseca, P. E., Paquette, J. L., Castro, P., and Matte, P.: The ca.
350 Ma Beja Igneous Complex: A record of transcurrent slab break-off in the
Southern Iberia Variscan Belt?, Tectonophysics, 461, 356–377,
https://doi.org/10.1016/j.tecto.2008.06.001, 2008.
Pulgar, J. A., Gallart, J., Fernández-Viejo, G., Pérez-Estaún,
A., and Álvarez-Marrón, J.: Seismic image of the Cantabrian Mountains
in the western extension of the Pyrenees from integrated ESCIN reflection
and refraction data, Tectonophysics, 264, 1–19,
https://doi.org/10.1016/S0040-1951(96)00114-X, 1996.
Quesada, C. and Dallmeyer, R. D.: Tectonothermal evolution of the
Badajoz-Cordóba shear zone (SW Iberia): characteristics and 40Ar
Quintana, L., Pulgar, J. A., and Alonso, J. L.: Displacement transfer from
borders to interior of a plate: A crustal transect of Iberia,
Tectonophysics, 663, 378–398, https://doi.org/10.1016/j.tecto.2015.08.046, 2015.
Rat, P.: The Basque-Cantabrian basin between the Iberian and European
plates: Some facts but still many problems, Rev. Soc. Geológica
España, 1, 327–348, 1988.
Reche, J., Martinez, F. J., Arboleya, M. L., Dietsch, C., and Briggs, W. D.:
Evolution of a kyanite-bearing belt within a HT-LP orogen: the case of NW
Variscan Iberia, J. Metamorph. Geol., 16, 379–394,
https://doi.org/10.1111/j.1525-1314.1998.00142.x, 1998.
Robardet, M.: Alternative approach to the Variscan Belt in southwestern
Europe: Preorogenic paleobiogeographical constraints, Spec. Pap. Geol. Soc.
Am., 364, 1–15, https://doi.org/10.1130/0-8137-2364-7.1, 2002.
Robardet, M. and Gutiérrez Marco, J. C.: Ossa-Morena Zone. Stratigraphy.
Passive Margin Phase (Ordovician-Silurian-Devonian), in: Pre-Mesozoic Geology
of Iberia, edited by: Dallmeyer, R. D. and Martínez García, E.,
Springer-Verlag, Berlin, 267–272, 1990.
Rodrigues, B., Chew, D. M., Jorge, R. C. G. S., Fernandes, P., Veiga-Pires,
C., and Oliveira, J. T.: Detrital zircon geochronology of the Carboniferous
Baixo Alentejo Flysch Group (South Portugal); Constraints on the provenance
and geodynamic evolution of the South Portuguese Zone, J. Geol. Soc.
London., 172, 294–308, https://doi.org/10.1144/jgs2013-084, 2015.
Ross, A. R., Brown, L. D., Pananont, P., Nelson, K. D., Klemperer, S. L.,
Haines, S., Wenjin, Z., and Jingru, G.: Deep reflection surveying in central
Tibet: Lower-crustal layering and crustal flow, Geophys. J. Int., 156,
115–128, https://doi.org/10.1111/j.1365-246X.2004.02119.x, 2004.
Royden, L.: Coupling and decoupling of crust and mantle in convergent
orogens: Implications for strain partitioning in the crust, J. Geophys.
Res., 101, 17679–17705, 1996.
Rubio Pascual, F. J., Arenas, R., Martínez Catalán, J. R.,
Rodríguez Fernández, L. R., and Wijbrans, J. R.: Thickening and
exhumation of the Variscan roots in the Iberian Central System:
Tectonothermal processes and 40Ar
Sánchez de Posada, L. C., Martínez Chacón, M. L., Méndez
Fernández, C., Menéndez Alvarez, J. R. Truyols, J., and Villa, E.:
Carboniferous Pre-Stephanian rocks of the Asturian-Leonese Domain
(Cantabrian Zone), in: Pre-Mesozoic Geology of Iberia, edited by:
Dallmeyer, R. D. and Martínez García, E., Springer-Verlag,
24–33, 1990.
Sánchez-García, T., Quesada, C., Bellido, F., Dunning, G. R., and
González del Tánago, J.: Two-step magma flooding of the upper crust
during rifting: The Early Paleozoic of the Ossa Morena Zone (SW Iberia),
Tectonophysics, 461, 72–90, https://doi.org/10.1016/j.tecto.2008.03.006, 2008.
Sánchez-García, T., Bellido, F., Pereira, M. F., Chichorro, M.,
Quesada, C., Pin, C., and Silva, J. B.: Rift-related volcanism predating the
birth of the Rheic Ocean (Ossa-Morena zone, SW Iberia), Gondwana Res.,
17, 392–407, https://doi.org/10.1016/j.gr.2009.10.005, 2010.
Sánchez Martínez, S., Arenas, R., Andonaegui, P., Martínez
Catalán, J. R., and Pearce, J. A.: Geochemistry of two associated
ophiolites from the Cabo Ortegal Complex (Variscan belt of NW Spain), Mem.
Geol. Soc. Am., 200, 445–467, https://doi.org/10.1130/2007.1200(23), 2007.
Schmelzbach, C., Juhlin, C., Carbonell, R., and Simancas, J. F.: Prestack and
poststack migration of crooked-line seismic reflection data: A case study
from the South Portuguese Zone fold belt, southwestern Iberia, Geophysics,
72, 9–18, https://doi.org/10.1190/1.2407267, 2007.
Schmelzbach, C., Simancas, J. F., Juhlin, C., and Carbonell, R.: Seismic
reflection imaging over the South Portuguese Zone fold-and-thrust belt, SW
Iberia, J. Geophys. Res.-Sol. Ea., 113, 1–16,
https://doi.org/10.1029/2007JB005341, 2008.
Seyferth, M. and Henk, A.: Syn-convergent exhumation and lateral extrusion
in continental collision zones – Insights from three-dimensional numerical
models, Tectonophysics, 382, 1–29, https://doi.org/10.1016/j.tecto.2003.12.004,
2004.
Shelley, D. and Bossière, G.: A new model for the Hercynian Orogen of
Gondwanan France and Iberia, J. Struct. Geol., 22, 757–776,
https://doi.org/10.1016/S0191-8141(00)00007-9, 2000.
Simancas, J. F., Martínez Poyatos, D., Expósito, I., Azor, A., and
González Lodeiro, F.: The structure of a major suture zone in the SW
iberian massif: The Ossa-Morena/central iberian contact, Tectonophysics,
332, 295–308, https://doi.org/10.1016/S0040-1951(00)00262-6, 2001.
Simancas, J. F., Carbonell, R., González Lodeiro, F.,
Pérez-Estaún, A., Juhlin, C., Ayarza, P., Kashubin, A., Azor, A.,
Martínez Poyatos, D., Almodóvar, G. R., Pascual, E., Sáez, R.,
and Expósito, I.: Crustal structure of the transpressional Variscan
orogen of SW Iberia: SW Iberia deep seismic reflection profile (IBERSEIS),
Tectonics, 22, 1062, https://doi.org/10.1029/2002TC001479, 2003.
Simancas, J. F., Carbonell, R., Gonzalez Lodeiro, F., Pérez-Estaún,
A., Juhlin, C., Ayarza, P., Kashubin, A., Azor, A., Martínez Poyatos,
D., Saez, R., Almodovar, G. R., Pascual, E., Flecha, I., and Marti, D.:
Transpressional collision tectonics and mantle plume dynamics: the
Variscides of southwestern Iberia, Geol. Soc. Lond. Mem., 32, 345–354,
2006.
Simancas, J. F., Ayarza, P., Azor, A., Carbonell, R., Martínez Poyatos,
D., Pérez-Estaún, A., and González Lodeiro, F.: A seismic
geotraverse across the Iberian Variscides: Orogenic shortening, collisional
magmatism, and orocline development, Tectonics, 32, 417–432,
https://doi.org/10.1002/tect.20035, 2013.
Snelson, C. M., Randy Keller, G., Miller, K. C., Rumpel, H. M., and Prodehl,
C.: Regional Crustal Structure Derived from the CD-ROM 99 Seismic
Refraction/Wide-Angle Reflection Profile: The Lower Crust and Upper Mantle,
in The Rocky Mountain Region: An Evolving Lithosphere: Tectonics,
Geochem. Geophys., 154, 271–291, https://doi.org/10.1029/154GM21, 2013.
Spear, F. S.: Metamorphic Phase Equilibria and pressure-temperature-time
paths, Monograph, Mineralogical Society of America, Chelsea,
1993.
Stille, H.: Grundfragen der Vergleichenden. Tectonik, Gebrueder Borntragen,
Berlin, 1924.
Taner, M. T. and Sheriff, R. E.: Application of Amplitude, Frequency, and
Other Attributes to Stratigraphic and Hydrocarbon Determination, in: AAPG
Memoir, Seismic Stratigraphy, Applications to Hydrocarbon Exploration,
26, 301–327, 1977.
Teixell, A., Labaume, P., Ayarza, P., Espurt, N., de Saint Blanquat, M., and
Lagabrielle, Y.: Crustal structure and evolution of the Pyrenean-Cantabrian
belt: A review and new interpretations from recent concepts and data,
Tectonophysics, 724/725, 146–170,
https://doi.org/10.1016/j.tecto.2018.01.009, 2018.
Truyols, J., Arbizu, M., Garcia-Alcalde, J. L., Garcia-López, S.,
Mendez-Bendia, I., Soto, F., and Truyols, M.: The Asturian-Leonese Domain
(Cantabrian Zone), in: Pre-Mesozoic Geology of Iberia, edited by:
Dallmeyer, R. D. and Martínez García, E., Springer-Verlag, 10–19,
1990.
Villaseca, C., Orejana, D., and Belousova, E. A.: Recycled metaigneous
crustal sources for S- and I-type Variscan granitoids from the Spanish
Central System batholith: Constraints from Hf isotope zircon composition,
Lithos, 153, 84–93, https://doi.org/10.1016/j.lithos.2012.03.024, 2012.
Wever, T.: The Conrad discontinuity and the top of the reflective lower
crust-do they coincide?, Tectonophysics, 157, 39–58,
https://doi.org/10.1016/0040-1951(89)90339-9, 1989.
Xiaobo, H. and Tae Kyung, H.: Evidence for strong ground motion by waves
refracted from the Conrad discontinuity, Bull. Seismol. Soc. Am., 100,
1370–1374, https://doi.org/10.1785/0120090159, 2010.
Short summary
Vertical incidence seismic profiling on the Iberian Massif images a mid-crustal-scale discontinuity at the top of the reflective lower crust. This feature shows that upper- and lower-crustal reflections merge into it, suggesting that it has often behaved as a detachment. The orogen-scale extension of this discontinuity, present in Gondwanan and Avalonian affinity terranes into the Iberian Massif, demonstrates its relevance, leading us to interpret it as the Conrad discontinuity.
Vertical incidence seismic profiling on the Iberian Massif images a mid-crustal-scale...
