The origin of the Variscan upper allochthons in the Ortegal Complex, northwestern Iberia: Sm-Nd isotopic constraints on the closure of the Rheic Ocean

Canadian Journal of Earth Sciences

Volumn 45, Issue 6, 2008, Pages 651-668

  Murphy, J Brendan ^a   Gutiérrez Alonso, Gabriel ^b  

^a ST FRANCIS XAVIER UNIVERSITY   (Canada)

^b UNIVERSITY OF SALAMANCA   (Spain)

Author keywords

[No Author keywords available]

Indexed keywords

CHLORINE COMPOUNDS; ISOTOPES; METAMORPHIC ROCKS; NEODYMIUM; TECTONICS;

ALLOCHTHONS; CAMBRIAN; COMMON SOURCES; CRUSTAL SOURCES; GALICIA; ISOTOPIC CHARACTERISTICS; OCEANIC SUBDUCTION; ORDOVICIAN; PROTOLITH; VARISCAN OROGENY;

VOLCANIC ROCKS;

ALLOCHTHON; AVALONIA; CAMBRIAN; COLLISION; DEVONIAN; FELSIC ROCK; GEOCHEMISTRY; GONDWANA; HERCYNIAN OROGENY; MAFIC ROCK; METAMORPHIC ROCK; OPHIOLITE; ORDOVICIAN; PALEOZOIC; PROTOLITH; SAMARIUM-NEODYMIUM DATING; SILURIAN; SUBDUCTION; SUTURE ZONE;

EURASIA; EUROPE; GALICIA; IBERIAN PENINSULA; SOUTHERN EUROPE; SPAIN;

SQUAMATA;

EID: 49549098401     PISSN: 00084077     EISSN: None     Source Type: Journal    
DOI: 10.1139/E08-019     Document Type: Article

References (121)

1. Ábalos, B., Azcárraga, J., Gil Ibarguchi, J.I., Mendia, M., and Santos Zalduegui, J.F. 1996. Flow stress, strain rate and effective viscosity evaluation in a high-pressure metamorphic nappe (Cabo Ortegal, Spain). Journal of Metamorphic Geology, 14: 227-248.
2. Ábalos, A., Carreras, J., Druguet, E., Escuder, J., Gómez Pugnaire, M.T., Lorenzo, S., et al. 2002. Variscan and PreVariscan Tectonics. In The Geology of Spain. Edited by W. Gibbons and M.T. Moreno. The Geological Society (of London), pp. 155-183.
3. Abati, J., Dunning, G.R., Arenas, R., Díaz García, F., González Cuadra, P., Martínez Catalán, J.R., and Andonaegui, P. 1999. Early Ordovician orogenic event in Galicia (NW Spain): evidence from U-Pb ages in the uppermost unit of the Ordenes Complex. Earth and Planetary Science Letters, 165: 213-228. doi:.10.1.016/S0012-821X(98) 00268-4.
4. Abati, J., Arenas, R., Martínez Catalán, J.R., and Díaz García, F. 2003. Anticlockwise P-T Path of Granulites from the Monte Castelo Gabbro (Órdenes Complex, NW Spain). Journal of Petrology, 44: 305-327. doi:10.1093/petrology/44.2.305.
5. Andonaegui, P., González del Tanago, J., Arenas, R., Abati, J., and Martínez Catalán, J.R. Peinado, M., and Díaz García, F. 2002. Tectonic setting of the Monte Castelo gabbro (Ordenes Complex, northwestern Iberian Massif): Evidence for an arc-related terrane in the hangingwall to the Variscan suture. In Variscan-Appalachian dynamics: the building of the late Paleozoic basement. Edited by J.R. Martínez Catalán, R.D. Hatcher Jr., R. Arenas, and F. Díaz García. Geological Society of America, Boulder, Colo., Special Paper 364, pp. 37-56.
6. Arenas, R. 1988. Evolución petrológica y geoquímica de la unidad alóctona inferior del complejo metamórfico básico-ultrabásico de Cabo Ortegal (Unidad de Moeche) y del Silúrico paraautóctono, Cadena Hercínica Ibérica (NW de España). Corpus Geologicum. Gallaeciae, 4, 543 p.
7. Arenas, R. 1991. Opposite P, T, t paths of Hercynian metamorphism between the upper units of the Cabo Ortegal Complex and their substratum (northwest of the Iberian Massif). Tectonophysics, 191: 347-364. doi:10.1016/0040- 1951(91)90067-3.
8. Arenas, R., Gil Ibarguchi, J.I., González Lodeiro, F., Klein, E., Martínez Catalán, J.R., Ortega Girones, E., Pablo Maciá, J.G., and Peinado, M. 1986. Tectonostratigraphic units in the complexes with mafic and related rocks of the NW of the Iberian Massif. Hercynica, 2: 87-110.
9. Arenas, R., Rubio Pascual, F.J., Díaz García, F., and Martínez Catalán, J.R. 1995. High-pressure micro-inclusions and development of an inverted metamorphic gradient in the Santiago Schists (Ordenes Complex, NW Iberian Massif, Spain): evidence of subduction and syn-collisional decompression. Journal of Metamorphic Geology, 13: 141-164. doi: 10.1111/j.1525-1314.1995.tb0021.1.x.
10. Arenas, R., MartÚnez Catalán, J.R., Sánchez Martínez, S., Díaz García, F., Abatí, J., Fernández-Suárez, J., Andonaegui, P., and Gómez Barreiro, J. 2007a. Paleozoic ophiolites in the Variscan suture of Galicia (northwest Spain). In 4-D framework of continental crust. Edited by R.D. Hatcher Jr., M.P. Carlson, J.H. McBride, and J.R. Martínez Catalán. Geological Society of America, Memoir 200, pp. 425-444.
11. Arenas, R., Martínez Catalán, J.R., Sánchez Martínez, S., Fernández-Suárez, .T., Andonaegui, P., Pearce, J.A., and Corfu, F. 2007b. The Vila de Cruces Ophiolite: A Remnant of the Early Rheic Ocean in the Variscan Suture of Galicia (Northwest Iberian Massif). The Journal of Geology, 115: 129-148. doi:10.1086/5.10645.
12. Azcárraga, J. 2000. Evolución tectónica y metamórfica de los mantos inferiores de grado alto y alta presión del Complejo de Cabo Ortegal. Serie Nova Terra 17. Ed. Do Castro. A Coruña, 306 p.
13. Bastida, F., Marcos, A., Marquínez, J., Martínez Catalán, J.R., Pérez-Estaún, A., Pulgar, J.A. 1984. Mapa Geológico Nacional Escala 1 : 200 000, 1, La Coruña, Instituto Geológico y Minero de España, Madrid.
14. Brun, J.P., and Burg, J.P. 1982. Combined thrusting and wrenching in the Ibero-Armorican arc: a corner effect during continental collision. Earth and Planetary Science Letters, 61: 319-332. doi:10.1016/0012-821.X(82)90063-2.
15. Castiñeiras, P. 2005. Origen y evolución tectonotermal de las unidades de O Pino y Cariño (Complejos alóctonos de Galicia): Laboratorio Xeolóxico de Laxe, Serie Nova Terra, 28, A Coruña, Spain, 279 p.
16. Castiñeiras, P., Andonaegui, P., Arenas, R., and Martínez Catalán, J.R. 2002. Descripción y resultados preliminares del plutón compuesto de San Xiao, Complejo de Cabo Ortegal (noroeste del Macizo Ibérico). Geogaceta, 32: 111-114.
17. Castro, A., Fernández, C., De la Rosa, J.D., Moreno Ventas, I., and Rogers, G. 1996. Significance of MORB-derived amphibolites from the Aracena metamorphic belt, southwest Spain. Journal of Petrology, 37: 235-260. doi:10.1093/petrology/37.2.235.
18. Castro, A., Coretgé, L.G., de la Rosa, J., Enrique, P., Martínez, F.J., Pascual, E., et al. 2002. Paleozoic magmatism. In The Geology of Spain, Edited by W. Gibbons, and T. Moreno, The Geological Society (of London), pp. 117-153.
19. Cocks, L.R.M., and Fortey, R.A. 1990. Biogeography of Ordovician and. Silurian faunas. In Paleozoic paleogeography and biogeography. Edited by W.S. McKerrow and C.R. Scotese. Geological Society (of London), Memoir 12, pp. 97-104.
20. Cocks, L.R.M., and Torsvik, T.H. 2002. Earth geography from 500 to 400 million years ago: a faunal and palaeomagnetic review. Journal of the Geological Society (of London), 159: 631-644.
21. Cook, C.A., Holdsworth, R.E., Styles, M.T., and Pearce, J.A. 2000. Pre-emplacement structural history recorded by mantle peridotites: an example from the Lizard Complex, SW England. Journal of the Geological Society (of London), 157: 1049-1064.
22. Dallmeyer, R.D., and Gil Ibarguchi, J.I. 1990. Age of amphibolitic metamorphism in the ophiolitic unit of the Morais allochthon (Portugal): implications for early Hercynian orogenesis in the Iberian Massif. Journal of the Geological Society (of London), 147: 873-878. doi:10.1144/gsjgs.147. 5.0873.
23. 39Ar dating of regional fabrics. Tectonophysics, 277: 307-337. doi:10.1016/S0040-1951(97)00035-8.
24. Daly, J.S., and McLelland, J.M. 1991. Juvenile middle Proterozoic crust in the Adirondack Highlands, Grenville Province, northeastern North America. Geology, 19: 119-122. doi:10.1130/0091-76.13(1991)0.19〈0119: JMPCIT〉2.3.CO;2.
25. Davies, G.R. 1984. Isotopic evolution of the Lizard. Complex. Journal of the Geological Society (of London), 141: 3-14. doi:10.1144/gsjgs.141.1. 0003.
26. DePaolo, D.J. 1981. Neodymium isotopes in the Colorado Front Range and crust-mantle evolution in the Proterozoic. Nature, 291: 193-196. doi:10.1038/291193a0.
27. DePaolo, D.J. 1988. Neodymium isotope geochemistry: an introduction. Springer Verlag, New York.
28. Díaz García, F., Arenas, R., Martínez Catalán, J.R., González del Tánago, J., and Dunning, G.R. 1999. Tectonic evolution of the Careón ophiolite (Northwest Spain): a remnant of oceanic lithosphere in the Variscan belt. The Journal of Geology, 107: 587-605. doi:.10.1086/314368.
29. Dickin, A.P., McNutt, R.H., and Clifford, P.M. 1990. A neodymium isotope study of plutons near the Grenville Front in Ontario, Canada. Chemical Geology, 83: 315-324. doi: 10.1016/0009-2541 (90)90287-H.
30. Díez Montes, A. 2006. La geología del Dominio "Olio de Sapo" en las comarcas de Sanabria y Terra do Bolo. Ph.D. thesis, University of Salamanca, Spain, 496 p.
31. Dostal, J., Baragar, W.R.A., and Dupuy, C. 1986. Petrogenesis of the Natkusiak continental basalts, Victoria Island, N.W.T. Canadian Journal of Earth Sciences, 23: 622-632.
32. Drury, S.A. 1980. The geochemistry of high-pressure gneisses from Cabo Ortegal (NW Spain): residues of deep anatexis. Geol Mijbouw, 59: 61-64.
33. Farias, P., Gallastegui, G., González-Lodeiro, F., Marquínez, J., Martín Parra, L., Martínez Catalán, J.R., De Pablo Maciá, J.G., and Rodríguez Fernández, L.R. 1987. Aportaciones al conocimiento de la litoestratigrafía y estructura de Galicia Central. Memórias da Faculdade de Ciências. Universidade do Porto, 1:411-431.
34. Fernández-Suárez, J., Gutiérrez-Alonso, G., Jenner, G.A., and Tubrett, M.N. 2000. New ideas on the Proterozoic - Early Paleozoic evolution of NW Iberia: insights from U-Pb detrital zircon ages. Precambrian Research, 102: 185-206. doi: 10.1016/S0301-9268(00)00065-6.
35. Fernández-Suárez, J., Gutiérrez-Alonso, G., Cox, R., and Jenner, G.A. 2002a. Assembly of the Armorica microplate: a strike-slip terrane delivery? Evidence from U-Pb ages of detrital zircons. The Journal of Geology, 110: 619-626. doi:10.1086/341760.
36. Fernández-Suárez, J., Corfu, F., Arenas, R., Marcos, A., Martínez Catalán, J.R., Díaz García, F., Abati, J., and Fernández, F.J. 2002ft. U-Pb evidence for a polyorogenic evolution of the HP-HT units of the NW Iberian Massif. Contributions to Mineralogy and Petrology, 143: 236-253. doi:10.1007/s004.10-00.1-0337-2.
37. Fernández-Suárez, J., Díaz García, F., Jeffries, T.E., Arenas, R., and Abati, J. 2003. Constraints on the provenance of the uppermost allochthonous terrane of the NW Iberian Massif: Inferences from, detrital zircon U-Pb ages. Terra Nova, 15: 138-144. doi:10.1046/j.1365- 3121.2003.00479.x.
38. Fernández-Suárez, J., Arenas, R., Abati, J., Martínez Catalán, J.R., Whitehouse, M.J., and Jeffries, T. 2007. U-Pb chronometry of polymetamorphic high-pressure granulites: an example from the allochthonous terranes of the NW Iberian Variscan belt. In 4-D evolution of continental crust. Edited by R.D. Jr. Hatcher, M.P. Carlson, J.H. McBride, and J.R. Martínez Catalán. Geological Society of America, Memoir 200, pp. 469-488.
39. Franke, W. 1989. Variscan plate tectonics in Central Europe - current ideas and open questions. Tectonophysics, 169: 221-228. doi:10.1016/0040-1951(89)90088-7.
40. Franke, W. 2000. The mid-European segment of the Variscides: tectonostratigraphic units, terrane boundaries and plate tectonic evolution. In Orogenic processes: quantification and modelling in the Variscan Belt. Edited by W. Franke, V. Haak, O. Oncken, and D. Tanner. Geological Society, Special Publication 179, pp. 35-61.
41. Galán, G., and Marcos, A. 1997. Geochemical evolution of high-pressure mafic granulites from the Bacariza formation (Cabo Ortegal Complex, NW Spain): an example of a heterogeneous lower crust. Geologische Rundschau, 86: 539-555. doi:10.1007/s005310050162.
42. Galán, G., and Marcos, A. 2000. The metamorphic evolution of the high pressure mafic granulites of the Bacariza Formation (Cabo Ortegal Complex, Hercynian belt, NW Spain). Lithos, 54: 139-171. doi:.10.1016/S0024- 4937(00)00020-7.
43. Gibbons, W., and Moreno, T. (Editors). 2002. The Geology of Spain. The Geological Society (of London), 649 pp.
44. Gil Ibarguchi, J.I., and Dallmeyer, R.D. 1991. Hercynian blueschist metamorphism in North Portugal: tectonothermal implications. Journal of Metamorphic Geology, 9: 539-549. doi:10.1111/j.1525-1314.1991.tb00547.x.
45. Gil Ibarguchi, J.I., Mendia, M., and Peucat, J.J. 1990. Petrology of eclogites and clinopyroxene-garnet metabasites from the Cabo Ortegal Complex (northwestern Spain). Lithos, 25: 133-162. doi:10.1016/0024-4937(90) 90011-0.
46. Goldstein, S.L., O'Nions, K., and Hamilton, P.J. 1984. A Sm-Nd isotopic study of atmospheric dust and particulates from major river systems. Earth and Planetary Science Letters, 70: 221-226. doi:10.1016/0012-821X(84)90007-4.
47. 39Ar laserprobe dating of mylonitic fabrics in a polyorogenic terrane of NW Iberia. Journal of the Geological Society, 163: 6.1-73. doi:10.1144/0016-764905-012.
48. Gómez Barreiro, J., Martínez Catalán, J.R., Arenas, R., Castiñeiras, P., Abati, J., Díaz García, F., and Wijbrans, J.R. 2007. Tectonic evolution of the upper allochthon of the Ordenes Complex (northwestern Iberian Massif): structural constraints to a polyorogenic peri-Gondwanan terrane. In The evolution of the Rheic Ocean: from Avalonian-Cadomian active margin to Alleghenian-Variscan collision. Edited by U. Linnemann, R.D. Nance, P. Kraft, and G. Zulauf. Geological Society of America, Special Paper 423, pp. 315-332.
49. Gravestock, P.J. 1992. The chemical causes of uppermost mantle heterogeneities. Ph.D. thesis, Open University, Milton Keynes, UK., 299 p.
50. Gutiérrez-Alonso, G., Barba, P., and Díaz García, F. 2000. Sedimentology and structure of the low grade uppermost unit of the Ordenes Complex at the coastal section. Superposition of structural trends and processes. In Variscan-Appalachian dynamics: the building of the upper Paleozoic basement. Basement Tectonics 15, A Coruña, Spain, Program and abstracts, pp. 234-235.
51. Gutiérrez-Alonso, G., Fernández-Suárez, J., and Weil, A.B. 2004. Orocline triggered lithospherie delamination. In Paleomagnetic and structural analysis of orogenic curvature, Edited by A.B. Weil and A. Sussman. Geological Society of America, Special Paper 383, pp. 121-131.
52. Gutiérrez-Alonso, G., Murphy, J.B., Fernández- Suárez, J., and Hamilton, M. 2008. Rifting along the northern Gondwana margin and the evolution of the Rheic Ocean: a Devonian age for the El Castillo volcanic rocks (Salamanca, Central Iberian Zone). Tectonophysies. doi:.10.1016/j.tecto.2008.01.0.13.
53. Hatcher, R.D. 2002. Alleghenian (Appalachian) orogeny, a product of zipper tectonics: rotational, transpressive continent-continent collision and closing of ancient oceans along irregular margins. In Variscan-Appalachian dynamics: the building of the late Paleozoic basement. Edited by J.R. Martínez Catalán, R.D. Hatcher Jr., R. Arenas, and F. Díaz García, F. Variscan-Appalachian dynamics: the building of the late Paleozoic basement. Geological Society of America, Special Paper 364, pp. 199-208.
54. Jenner, G.A., Longerich, H.P., Jackson, S.E., and Fryer, B.J. 1990. ICP-MS-A powerful tool for high-precision trace-element analysis in Earth sciences: evidence from analysis of selected USGS reference samples. Chemical Geology, 83: 133-148. doi:10.1016/0009-2541(90)90145-W.
55. Julivert, M., Marcos, A., and Truyols, J. 1972. L'évolution paléogéographique du nord-ouest de l'Espagne pendant l'Ordovicien-Silurien. Bulletin de la Societé géologique et minéralogique de Bretagne, 4: 1-7.
56. Kerr, A., Jenner, G.A., and Fryer, B.J. 1995. Sm-Nd isotopic geochemistry of Precambrian to Paleozoic granitoid suites and the deep-crustal structure of the southeast margin of the Newfoundland Appalachians. Canadian Journal of Earth Sciences, 32: 224-245.
57. Kryza, R., Mazur, S., and Pin, C. 2003. Subduction- and non-subduction-related igneous rocks in the Central European Variscides: geochemical and Nd isotope evidence for a composite origin of the Kodzko Metamorphic Complex, Polish Sudetes. Geodinamica Acta, 16:39-57. doi:10.1016/S09S5-3111(02)00 004-9.
58. Lefort, J.P. 1989. Basement correlation across the North Atlantic. Springer, Berlin, 148 p.
59. Lotze, F. 1945. Zur Gliederung der Varisziden der Iberischen Meseta. Geotektonische Forschungen, 6: 78-92.
60. Martínez Catalán, J.R., Hacar Rodríguez, M.P., Villar Alonso, M.P., Pérez-Estaún, A., and González Lodeiro, F. 1992. Paleozoic extensional tectonics in the limit between the West Asturias-Leonese and the Central Iberian Zones of the Variscan FoldBelt in NW Spain. Geologische Rundschau, 81: 545-560. doi:10.1007/BF01828614.
61. Martínez Catalán, J.R., Arenas, R., Díaz García, F., Rubio Pascual, F.J., Abati, J., and Marquínez, J. 1996. Variscan exhumation of a subducted Paleozoic continental margin: the basal units of the Órdenes Complex, Galicia, NW Spain. Tectonics, 15: 106-121. doi:10.1029/95TC02617.
62. Martínez Catalán, J.R., Arenas, R., Díaz García, F., and Abati, J. 1997. Variscan accretionary complex of northwest Iberia: terrane correlation and succession of tectonothermal events. Geology, 25: 1103-1106. doi:10.1130/009.1-7613(1997)025〈1103: VACONI〉2.3.CO;2.
63. Martínez Catalán, J.R., Arenas, R., Díaz García, F., and Abati, J. 1999. Allochthonous units in the Variscan belt of NW Iberia. Terranes and accretionary history. In Basement tectonics. Edited, by A.K. Sinha. Kluwer Academic Publishers, Norwell, Mass., USA., 13, pp. 65-84.
64. Martínez Catalán, J.R., Díaz García, F., and Arenas, R. Abati. J., Castiñeiras, P., González Cuadra, P., Gómez Barreiro, J., and Rubio Pascual, F.J. 2002. Thrust and detachment systems in the Ordenes Complex, (northwestern Spain): Implications for the Variscan-Appalachian geodynamics. In Variscan-Appalachian dynamics: the building of the late Paleozoic basement: Edited by J.R. Martínez Catalán R.D. Hatcher, R. Arenas and F. Diaz Garcia. Geological Society of America, Special Paper 364, pp. 163-182.
65. Martínez Catalán, J.R., Fernández-Suárez, J., Jenner, G.A., Belousova, E.A., and Diez Montes, A. 2004. Provenance constraints from detrital zircon U-Pb ages in the northwestern Iberian Massif. Implications for Paleozoic plate configuration and Variscan evolution. Journal of the Geological Society, 161: 463-476.
66. Martínez Catalán, J.R., Arenas, R., Díaz García, F., Gómez Barreiro, J., González Cuadra, P., Abati, .T., et al. 2007. Space and time in the tectonic evolution of the northwestern Iberian Massif. Implications for the comprehension of the Variscan belt. In 4-D framework of continental crust. Edited by R.D. Hatcher Jr., M.P. Carlson, J.H. McBride, and J.R. Martínez Catalán. Geological Society Memoir, 200, pp. 403-423.
67. Matte, P. 2001. The Variscan collage and orogeny (480-290 Ma) and the tectonic definition of the Armorica microplate: a review. Terra Nova, 13: 122-128. doi:10.1046/j.1365-3121.2001.00327.x.
68. Matte, P., and Ribeiro, A. 1975. Forme et orientation de 1'elipsoide de déformation dans la virgation hercynienne de Galice. Relations avec le plissement et hypothèses sur la génèse de l'arc Ibéro-armoricain, Paris. Academie des Sciences Comptes Rendus, 280: 2825-2828.
69. McKerrow, W.S., and Scotese, C.R. (Editors). 1990. Palaeozoic palaeogeography and biogeography. Geological Society (of London), Memoir 12, 435 p.
70. Mendia, M. 2000. Petrología de la unidad eclogítica del Complejo de Cabo Ortegal (NW de España). Serie Nova Terra 16. Ed. Do Castro. A Coruña, 424 p.
71. Miyashiro, A. 1974. Volcanic rock series in island arcs and active continental margin. American Journal of Science, 274: 321-355.
72. Moreno, T., Gibbons, W., Prichard, H., and Lunar, R. 2001. Platiniferous chromitite and the tectonic setting of ultramafic rocks in Cabo Ortegal (northwest Spain). Journal of the Geological Society, 158: 601-614.
73. Murphy, J.B., and Dostal, J. 2007. Continental mafic magmatism of different ages in the same terrane: constraints on the evolution of an enriched mantle source. Geology, 35: 335-338. doi:10.1130/G23072A.1.
74. Murphy, J.B., Strachan, R.A., Nance, R.D., Parker, K.D., and Fowler, M.B. 2000. Proto-Avalonia: A 1.2 to 1.0 Ga tectonothermal event and constraints for the evolution of Rodinia. Geology, 28: 1071-1074. doi:10.1130/0091- 7613(2000)28〈1071:PAGTEA〉2.0.CO;2.
75. Murphy, J.B., Eguiluz, L., and Zulauf, G. 2002. Cadomian orogens, peri-Gondwanan correlatives and Laurentia-Baltica connections. Tectonophysics, 352: 1-9. doi:10.1016/S0040-1951(02)00186-5.
76. Murphy, J.B., Gutiérrez-Alonso, G., Nance, R.D., Fernandez-Suarez, J., Keppie, J.D., Quesada, C., Strachan, R.A., and Dostal, J. 2006. Origin of the Rheic ocean: Rifting along a Neoproterozoic Suture? Geology, 34: 325-328. doi:10.1130/G22068.1.
77. Murphy, J.B., Gutiérrez-Alonso, G., Fernández- Suárez, J., and Braid, J.A. 2008. Probing crustal and mantle lithosphere origin through Ordovician volcanic rocks along the northern (Iberian) passive margin of Gondwana. Tectonophysics, in press, doi:10.1016/j.techo.2008.03.013.
78. Ordóñez Casado, B., Gebauer, D., Schäfer, H.-J., Gil Ibarguchi, J.I., and Peucat, J.J. 2001. A single Devonian subduction event for the HP/HT metamorphism of the Cabo Ortegal Complex within the Iberian Massif. Tectonophysics, 332: 359-385. doi:10.1016/S0040-1951(00)00210-9.
79. Patchett, P.J.,and Ruiz,J. 1989. Nd isotopes and the origin of the Grenville-aged rocks in Texas: implications for Proterozoic evolution of the United States mid-continental region. Journal of Geology, 97: 685-695.
80. Pearce, J.A. 1982. Trace element characteristics of lavas from destructive plate boundaries: In Andesites. Edited by R.S. Thorpe. Wylie and Sons, Chichester, UK., pp. 525-548.
81. Pearce, J.A. 1996. A user's guide to basaltic discrimination diagrams. In Trace element geochemistry of volcanic rocks: applications for massive sulphide exploration. Edited by D.A. Wyman. Geological Association of Canada, Short Course Notes 12, pp. 79-113.
82. Pérez-Estaún, A., and Bea, F. 2004. Macizo Ibérico. In Geología de España. Edited by J.A. Vera. SGE-IGME, Madrid, Spain, pp. .19-230.
83. Pérez-Estaún, A., Bastida, F., Martínez Catalán, J.R., Gutiérrez-Marco, J.C., Marcos, A., and Pulgar, J.A. 1990. West Asturias-Leonese Zone: Stratigraphy. In Pre-Mesozoic geology of Iberia. Edited by R.D. Dallmeyer and E. Martínez-García. Springer Verlag, Berlin, Germany, pp. 92-102.
84. Pérez-Estaún, A., Martínez Catalán, J.R., and Bastida, F. 1991. Crustal thickening and deformation sequence in the footwall to the suture of the Hercynian belt of NW Spain. Tectonophysics, 191: 243-253. doi:10.1016/0040-1951(91)90060-6.
85. Pérez-Estaún, A., Pulgar, J., Banda, E., and Álvarez-Marrón, J., and ESCI-N Research Group. .1994. Crustal structure of the external Variscides in NW Spain from deep seismic reflection profiling. Tectonophysics, 232:91-118. doi:10.1.016/0040-1951(94)90078-7.
86. Peucat, J.J., Bernard-Griffiths, J., Gil Ibarguchi, J.I., Dallmeyer, R.D., Menot, R.P., Cornichet, J., and Iglesias Ponce de León, M. 1990. Geochemical and geochronological cross section of the deep Variscan crust: The Cabo Ortegal high-pressure nappe (northwestern Spain). Tectonophysics, 177: 263-292. doi:10.1016/0040-1951(90)90285-G.
87. Pin, C., and Paquette, J.-L. 2002. Sr-Nd isotope and trace element evidence for a Late Devonian active margin in northern Massif Central (France). Geodinamica Acta, 15: 63-77. doi:10.1016/S0985-3111(01)01079-8.
88. Pin, C., Ortega Cuesta, L.A., and Gil Ibarguchi, J.I. 1992. Mantle derived, early Paleozoic A-type metagranitoids from the NW Iberian massif: Nd isotope and trace-element constraints. Bulletin de la Société Géologique de France, 163: 483-494.
89. Pin, C., Paquette, J.L., Santos Zalduegui, J.F., and Gil Ibarguchi, J.I. 2002. Devonian suprasubduction zone ophiolite related to incipient collisional processes in the Western Variscan Belt: The Sierra de Careón Unit, Ordenes Complex, Galicia. In Variscan-Appalachian dynamics: the building of the late Paleozoic basement: Edited by J.R. MartÚnez Catalán, R.D. Hatcher, R. Arenas, and F. Díaz García. Geological Society of America, Special Paper 364, pp. 57-71.
90. Pin, C., Paquette, J.L., Ábalos, B., Santos Zalduegui, J.F., and Gil Ibarguchi, J.I. 2006. Composite origin of an early Variscan. transported suture: Ophiolitic units of the Morais Nappe Complex (north Portugal). Tectonics, 25: TC5001. doi:10.1029/2006TC001971.
91. Puelles, P. 2004. Deformación, metamorfismo y exhumación de las granulitas de alta presión de la Bacariza (Complejo de Cabo Ortegal, NO de España). Serie Nova Terra, 23, 441 p.
92. Puelles, P., Abalos, B., and Gil Ibarguchi, J.I. 2005. Metamorphic evolution and thermobaric structure of the subduction-related Bacariza high-pressure granulite formation (Cabo Ortegal Complex, NW Spain). Lithos, 84: 125-149. doi:10.1016/j.lithos.2005.01.009.
93. Quesada, C. 1990. Precambrian terranes in the Iberian Variscan foldbelt. In Avalonian and Cadomian geology of the North Atlantic. Edited by R. A. Strachan and G.K. Taylor. Blackie and Son, Glasgow, Scotland, pp. 109-133.
94. 39Ar mineral age constraints. Tectonophysics, 231: 195-213. doi:10.1016/0040-1951(94)90130-9.
95. Quesada, C., Bellido, F., Dallmeyer, R.D., Gil Ibarguchi, J.I., Oliveira, J.T., Pérez Estaún, A., et al. 1991. Terranes within the Iberian Massif: correlations with West African sequences. In The West African orogens and circum-Atlantic correlations. Edited by R.D. Dallmeyer and J.P.Lecorché. Springer-Verlag, Berlin, Germany, pp. 267-294.
96. Ribeiro, A. 1974. Contribution à l'étude tectonique de Trás-os-Montes Oriental. Memórias dos Serviços Geológicos de Portugal, 24, p. 168.
97. Ribeiro, A., Munhá, J., Dias, R., Mateus, A., Pereira, E., Ribeiro, L., et ai. 2007. Geodynamic evolution of the SW Europe Variscides. Tectonics, 26: TC6009. doi:10.1029/2006TC002058.
98. Robardet, M. 2002. Alternative approach to the Variscan Belt in Southwestern Europe: preorogenic paleobiogeographical constraints. In Variscan-Appalachian dynamics: the building of the late Paleozoic basement: Edited by J.R. Martínez Catalán, R.D. Hatcher, R. Arenas, and F. Díaz García. Geological Society of America, Special Paper 364, pp. 1-15.
99. Robardet, M. 2003. The Armorica microplate: fact or fiction? Critical review of the concept and contradictory paleobiogeographical data. Palaeogeography, Palaeoclimatology, Palaeoecology, 195: 125-148. doi:10.1016/S0031-0182(03)00305-5.
100. Rodriguez Aller, J. 2005. Recristalización y deformación de litologías supracorticales sometidas a metamorfismo de alta presión (Complejo de Malpica-Tuy, NO del Macizo Ibérico). Laboratorio Xeolóxico de Laxe, Serie Nova Terra, 29, A Coruña, 572 p.
101. Roger, F., and Matte, P. 2005. Early Variscan HP metamorphism in the western Iberian Allochthon: A 390 Ma U-Pb age for the Bragança eclogite (NW Portugal). International Journal of Earth Sciences, 94: 173-179. doi:10.1007/s00531-005-0466-3.
102. Sánchez Martínez, S., Jeffries, T., Arenas, R., Fernández-Suárez, J., and García-Sánchez, R. 2006. A pre-Rodinian ophiolite involved in the Variscan suture of Galicia (Cabo Ortegal Complex, NW Spain). Journal of the Geological Society, 163: 737-740. doi:10.1144/0016-76492006-030.
103. Sánchez Martínez, S., Arenas, R., Díaz García, F., Martínez Catalán, J.R., and Gómez Barreiro, J. 2007. Careón ophiolite, NW Spain: suprasubduction zone setting for the youngest Rheic Ocean floor. Geology, 35: 53-56. doi:10.1130/G23024A.1.
104. 39Ar geochronology of the Man of War Gneiss, Lizard Complex, SW England: pre-Hercynian arc-type crust with a SudetanIberian connection. Journal of the Geological Society (of London), 154: 403-411. doi:10.1.144/gsjgs.154.3. 0403.
105. Santos, F.J., Scharer, U., Gil Ibarguchi, J.I., and Girardeau, J. 2002. Genesis of pyroxenite-rich peridotite at Cabo Ortegal (NW Spain): geochemical and Pb-Sr-Nd isotope data. Journal of Petrology, 43: 17-43. doi:10.1093/petrology/43.1.17.
106. Santos Zalduegui, J.F., Schärer, U., and Gil Ibarguchi, J.I. 1996. Origin and evolution of the Paleozoic Cabo Ortegal ultramaficmafic complex (NW Spain): U-Pb, Rb-Sr, and Pb-Pb isotope data. Chemical Geology, 129: 281-304. doi:10.1016/0009-2541(95)00144-1.
107. Schärfer, H.J., Gebauer, D., Gil Ibarguchi, J.I., and Peucat, J.J. 1.993. Ion-microprobe U-Pb zircon dating on the HP/HT Cabo Ortegal Complex (Galicia, NW Spain): preliminary results. Terra Abstracts, 4: 22.
108. Scotese, C.R. 2001. Atlas of Earth history, Vol. 1, Paleogeography, (PALEOMAP Project). Arlington, Texas.
109. Simancas, J.F., González Lodeiro, F., Expósito, I., Azor, A., and Martínez Poyatos, D.M. 2002. Opposite subduction polarities connected by transform. faults in the Iberian Massif and western European Variscides. In Variscan-Appalachian dynamics: the building of the late Paleozoic basement: Edited by J.R. Martínez Catalán, R.D. Hatcher, R. Arenas, and F. Díaz García. Geological Society of America, Special Paper 364, pp. 253-262.
110. Simancas, J.F., Tahiti, A., Azor, A., González Lodeiro, F., Martínez Poyatos, D.J., and El Hadi, H. 2005. The tectonic frame of the Vari scan-Alleghanian orogen in Southern Europe and Northern Africa. Tectonophysics, 398: 181-198. doi:10.1016/j.tecto.2005.02.006.
111. Steiger, R.H., and Jäger, E. 1977. Subcommission on geochronology: convention on the use of decay constants in geo- and cosmochronology. Earth and Planetary Science Letters, 36: 359-362. doi:10.1016/0012-821X(77)90060-7.
112. Sun, S.-S., and McDonough, W.F. 1989. Chemical and isotopic systematica of oceanic basalts: implications for mantle composition and processes. In Magmatism in the oceanic basins. Edited by A.D. Saunders and M.J. Norry. Geological Society (of London), Special Publication 42, pp. 313-345.
113. Tait, J.A., Bachtadse, V., Franke, W., and Soffel, H.C. 1997. Geodynamic evolution of the European Variscan fold belt: palaeomagnetic and geological constraints. Geologische Rundschau, 86: 585-598. doi:10.1007/ s005310050165.
114. Valverde Vaquero, P., and Fernández, F.J. 1996. Edad de enfriamiento U-Pb en rutilos del Gneiss de Chimparra (Cabo Ortegal, NO de España). Geogaceta, 20: 475-478.
115. Van der Voo, R. 1982. Pre-Mesozoic paleomagnetism and plate tectonics. Annual Review of Earth and Planetary Sciences, 10: 191-220. doi:10.1146/annurev.ea.10.050182.001203.
116. Vera, J.A. (Editor). 2004. Geología de España. S.G.E.-I.G.M.E., Madrid, 890 p.
117. Vogel, D.E. 1967. Petrology of an eclogite- and pyrigarnite-bearing polyinetamorphic rock complex at Cabo Ortegal, NW Spain. Leidse Geologische Mededelingen, 40: 121-213.
118. Weil, A.B., Van der Voo, R., and van der Pluijm, B. 2001. New paleomagnetic data from, the southern Cantabria-Asturias Arc, northern Spain: implications for true oroclinal rotation and the final amalgamation of Pangea. Geology, 29: 991-994. doi:10.1130/0091-7613(2001)029〈;0991: OBAEAT〉2.0.CO;2.
119. Winchester, J.A., and Floyd, P.A. 1977. Geochemical discrimination of different magma series and their differentiation products using immobile elements. Chemical Geology, 20: 325-343. doi:10.1016/0009-2541(77)90057- 2.
120. Winchester, J.A., Pharaoh, T.C., and Verniers, J. 2002. Palaeozoic amalgamation of Central Europe: an introduction and synthesis of new results from recent geological and geophysical investigations. In Palaeozoic amalgamation of Central Europe. Edited by J.A. Winchester, T.C. Pharaoh, and J. Verniers. Geological Society (of London), Special Publication 201, pp.1-18.
121. Wood, D.A., Joron, J.-L., and Treuil, M. 1979. A re-appraisal of the use of trace elements to classify and discriminate between magma series erupted in different tectonic settings. Earth and Planetary Science Letters, 45: 326-336. doi:10.1016/0012-821X(79)90133-X.