A single Devonian subduction event for the HP/HT metamorphism of the Cabo Ortegal complex within the Iberian Massif

Tectonophysics

Volumn 332, Issue 3, 2001, Pages 359-385

  Ordonez Casado B ^a   Gebauer, D ^a   Schafer H J ^a   Ibarguchi, J I G ^b   Peucat, J J ^c  

^a ETH ZURICH   (Switzerland)

^b UNIVERSITY OF THE BASQUE COUNTRY UPV EHU   (Spain)

^c UNIVERSITÉ DE RENNES 1   (France)

Author keywords

European variscides; HP and HT metamorphism; NW Spain; SHRIMP dating

Indexed keywords

DEVONIAN; GEOCHRONOLOGY; METAMORPHISM; P-T-T PATH; SUBDUCTION;

SPAIN;

EID: 17544404493     PISSN: 00401951     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0040-1951(00)00210-9     Document Type: Article

References (90)

1. Abalos B. Omphacite fabric variation in the Cabo Ortegal eclogite (NW Spain): relationships with strain symmetry during high-pressure deformation. J. Struct. Geol. 19:1997;621-637.
2. Abalos B., Azcárraga J., Gil Ibarguchi J.I., Mendia M.S., Santos Zalduegui J.F. Flow stress, strain rate and effective viscosity evaluation in a high-pressure nappe (Cabo Ortegal, Spain). J. Metam. Geol. 14:1996;227-248.
3. Abalos B., Mendia M., Gil Ibarguchi J.I. Structure of the Cabo Ortegal eclogite-facies zone (NW Iberia). C.R. Acad. Sci. Paris 319, sér. II:1994;1231-1238.
4. Arenas R., Gil Ibarguchi J.I., González Lodeiro F., Klein E., Martínez Catalán J.R., Ortega Girones E., De Pablo Maciá J.G., Peinado M. Tectonostratigraphic units in the complexes with mafic and related rocks of the NW of the Iberian Massif. Hercynica. II-2:1986;87-110.
5. Bard, J.P., Burg, J.P., Matte, Ph., Ribeiro, A., 1980. La chaîne hercynienne d'Europe occidentale en termes de tectonique des plaques. Coll C6, 26 Cogr. Geol. Int. Mém. B.R.G.M., vol. 108, pp. 233-246.
6. Basterra R., Cassi J.M., Pérez San Román L., Tascon A., Gil Ibarguchi J.I. Evolución metamórfica de las rocas pelíticas y semipelíticas de las formaciones Banded Gneises y Gneises de Cariño (Cabo Ortegal, NW España). Stud. Geol. Salmanticensia. 4:1989;133-146.
7. Bastida, F., Marcos, A., Marquínez, J., Pérez-Estaún, A., Pulgar, A., 1984. Mapa geológico de España, 1:200000, Hoja No 1, La Coruña, Inst. Geol. Min. de España, Madrid.
8. Becker H. Sm-Nd garnet ages and cooling history of high-temperature peridotites and high-pressure granulites from Lower Austria. Contrib. Mineral. Petrol. 127:1997;224-236.
9. Ben Jamaa, N., 1988. Les peridotites de Bay Island (Terre Neuve) et de Cab Ortegal (Espagne): approche petro-structurale. Dissertation Univ Paris VII (France), (unpubl.).
10. Bernard-Griffiths J., Peucat J.J., Cornichet J., Iglesias Ponce de Leon M., Gil Ibarguchi J.I. U-Pb, Nd isotope and REE geochemistry in eclogites from the Cabo Ortegal complex, Galicia, Spain: An example of REE immobility conserving MORB-like patterns during high-grade metamorphism. Chem. Geol. 52:1985;217-225.
11. von Blanckenburg F., Davies J.H. Slab breakoff: A model for syncollisional magmatism and tectonics in the Alps. Tectonics. 14/1:1995;120-131.
12. Compston W., Williams I.S., Meyer C. U-Pb geochronology of zircons from lunar breccia 73217 using a sensitive high mass-resolution ion microprobe. J. Geophys. Res. 89:1984;B525-B534.
13. Compston W., Kinny P.D., Williams I.S., Foster J.J. The age and Pb loss behaviour of zircons from the Isua supracrustal belt as determined by ion microprobe. Earth Planet. Sci. Lett. 80:1986;71-81.
14. Dallmeyer R.D., Gil Ibarguchi J.I. Age of amphibolitic metamorphism in the ophiolitic unit of the Morais allochthon (Portugal): implications for early Hercynian orogenesis in the Iberian Massif. J. Geol. Soc. Lond. 147:1990;873-878.
15. Dallmeyer R.D., Tucker R.D. U-Pb zircon age for the Lagoa augen gneiss, Morais complex, Portugal: tectonic implications. J. Geol. Soc. London. 150:1993;405-410.
16. 39Ar dating of regional fabrics. Tectonophysics. 277:1997;307-337.
17. 39Ar mineral ages. Lithos. 27:1991;133-144.
18. Engels, J.O., Hubregtse, J.J.M.W., Floor, P., den Tex, E., 1974. Precambrian complexes in the Hercynian orogen of the northwestern Iberian Peninsula. In: Precambrien des zones mobiles de l'Europe, Conference Liblice, Prague, pp. 163-173.
19. Fernández, F.J., 1997. Estructuras desarrolladas en gneises bajo condiciones de alta P y T (Gneises de Chímparra, Cabo Ortegal, A Coruña, Galicia, España). Ed. O Castro, La Coruña, Serie Nova Terra, 13, 249pp.
20. Fernández, F.J., Marcos, A., 1997. Datos geoquímicos de los gneises de Chímparra y consideraciones sobre el origen de los gneises cuarzofeldespáticos del Complejo de Cabo Ortegal (NW de España). XIV Reunião de Geologia do Oeste Peninsular, Vila Real, Abstr. 43-48.
21. Galán G., Marcos A. Geochemical evolution of high-pressure mafic granulites from the Bacariza formation (Cabo Ortegal complex, NW Spain): An example of a heterogeneous lower crust. Geol. Rundsch. 86:1997;539-555.
22. Gallastegui, G., 1993. Petrología del macizo granodiorítico de Bayo-Vigo (Provincia de Pontevedra, España). PhD thesis, Univ. Oviedo, 363pp.
23. Gebauer D. Isotope Geology of Eclogites. Carswell D.A. Eclogite Facies Rocks. 1990;141-159 Blackie, New York.
24. Gebauer D. The Pre-Alpine Evolution of the Continental Crust of the Central Alps - An Overview. von Raumer J.F., Neubauer F. Pre-Mesozoic Geology in the Alps. 1993;93-117 Springer, Berlin.
25. Gebauer D. A P-T-t path for some high-pressure ultramafic/mafic rocks associations and their felsic country rocks based on SHRIMP-dating of magmatic and metamorphic zircon domains. Example: Alpe Arami (Central Swiss Alps). Basu A., Hart S. Earth Processes: Reading the Isotopic code. Geophys Monogr. vol. 95:1996;307-329 AUG, Washington, DC.
26. Gebauer D., Grünenfelder M. U-Pb zircon and Rb-Sr mineral dating of eclogites and their country rocks. Example: Münchberg Gneiss Massif, Northeast Bavaria. Earth Planet. Sci. Lett. 42:1979;35-44.
27. Gebauer, D., Grünenfelder, M., 1982. Geological development of the Hercynian belt of Europe based on age and origin of high-pressure mafic and ultramafic rocks. Proc. 5th Int. Conf. Geochron. Cosmochron. Isotope Geol. Japan, pp. 111-112.
28. Gebauer D., Liati A. Geochronological evidence for Mesozoic rifting and oceanisation followed by Eocene subduction in the Rhodope Complex (Northern Greece). Terra Nova. 9:(Abstr. Suppl. 1):1997;10.
29. Gebauer D., Schertl H.P., Brix M., Schreyer W. 35 Ma old ultrahigh-pressure metamorphism and evidence for very rapid exhumation in the Dora Maira Massif, Western Alps. Lithos. 41:1997;5-24.
30. Gebauer D., Williams I.S., Compston W., Grünenfelder M. The development of the Central European continental crust since the Early Archaean based on conventional and ion-microprobe dating of up to 3.84 by old detrital zircons. Tectonophysics. 157:1989;81-96.
31. Geyh M.A., Schleicher H. Absolute Age Determination. 1990;Springer, Berlin. (503pp.).
32. Gil Ibarguchi J.I., Abalos B., Campillo A., Higuero A., López B., Pinilla V., Rodríguez C.I., Rodríguez R., Urtiaga K. Asociaciones con granate-clinopiroxeno en la unidad catazonal superior del Complejo del Cabo Ortegal (NO España). Cuadernos do Laboratorio Xeológico de Laxe. 2:1987;165-181.
33. Gil Ibarguchi J.I., Mendía M., Girardeau J., Peucat J.J. Petrology of the eclogites and the clinopyroxene-garnet metabasites from the Cabo Ortegal complex (northwest Spain). Lithos. 25:1990;133-162.
34. Girardeau J., Gil Ibarguchi J.I. Pyroxenite-rich peridotites of the Cabo Ortegal complex (northwestern Spain): evidence for large-scale upper mantle heterogeneity. J. Petrol. Special Lherzolite Issue:1991;135-154.
35. Gravestock, P.J., 1992. The chemical causes of uppermost mantle heterogeneities. PhD thesis, Open University, Milton Keynes, UK, 294pp.
36. Gravestock, P.J., Hawkesworth, C.J., van Calsteren, P.W.C., 1995. An island ar setting for the Cabo Ortegal ultramafic complex, NW Spain. In: Barsczus, H.G., Gervilla, F., (eds.), 2nd International Workshop on Orogenic Lherzolites and mantle-processes (Granada). Abstr, 1, p. 23.
37. 40Ar in hornblende. Contrib. Mineral. Petrol. 78:1981;324-331.
38. Iglesias, M., Ribeiro, M.L., Ribeiro, A., 1983. La interpretación aloctonista de la estructura del Noroeste Peninsular. In: Libro Jubilar, J.M. Ríos, (Geología de España). Inst. Geol. Miner. Explor., pp. 459-467.
39. Jäger E. Jäger E., Hunziker J.C. Introduction to geochronology. Lectures in Isotope Geology. 1979;1-12 Springer, Berlin.
40. Kotková J., Dörr W., Finger F. New geochemical and geochronological data on the very-high-pressure garnetite fro the Podolsko Complex, Moldanubian Zone, Bohemian Massif. Acta Univ. Carol., Geologica. 42:(2):1998;281-282.
41. Kröner A., Wendt I., Liew T.C., Compston W., Todt W., Fiala J., Vankova V., Vanek J. U-Pb zircon and Sm-Nd model ages of high-grade Moldanubian metasediment, Bohemian Massif, Czechoslovakia. Contrib. Mineral. Petrol. 99:1988;257-266.
42. Kuijper R.P., Priem H.N.A., den Tex E. Late Archean-Early Proterozoic source ages of zircons in rocks from the Paleozoic orogen of Western Galicia, NW Spain. Precambrian Res. 19:1982;1-29.
43. Kuijper R.P., Vogel D.E., den Tex E. Eclogite-plagiopyrigarnite relations in the catazonal complexes of northwest Spain. Chem. Geol. 50:1985;163-171.
44. Marqués F.E., Ribeiro A., Munhá J. Geodynamic evolution of the continental allochthonous terrane (CAT) of the Bragança nappe complex, NE Portugal. Tectonics. 15/4:1996;747-762.
45. Martínez Catalán J.R., Arenas R., Díaz García F., Abati J. Variscan accretionary complex of northwest Iberia: Terrane correlation and succession of tectonothermal events. Geology. 25:1997;1103-1106.
46. Matte P. Accretionary history and crustal evolution of the Variscan belt in Western Europe. Tectonophysics. 196:1991;309-337.
47. Mattinson J.M. Age, origin and thermal histories of some plutonic rocks from the Salinian Block of California. Contrib. Mineral. Petrol. 67:1978;233-245.
48. Mendia M., Abalos B., Gil Ibarguchi J.I. Refined reconstruction of the highest P and T portion of the Cabo Ortegal eclogite evolution through garnet zoning pattern and included/matrix mineral composition. Terra Nova. 9:(Abstr. Suppl. 1):1997;20.
49. Mendia M., Ortega L.A., Gil Ibarguchi J.I. Geochemistry of eclogite types from the Cabo Ortegal Complex (NW Iberian Peninsula): an example of differentiated tholeiitic series. Terra Nova. 9:(Abstr. Suppl. 1):1997;518.
50. Mezger K., Hanson G.N., Bohlen S.R. High-precision U-Pb ages of metamorphic rutile: application to the cooling history of high-grade terranes. Earth Planet. Sci. Lett. 96:1989;106-118.
51. 39Ar thermochronological constraints on a collapsed terrane. Tectonophysics. 238:1994;353-379.
52. Nägler Th., F ., Schäfer H.J., Gebauer D. Evolution of the Western European continental crust: implications from Nd and Pb isotopes in Iberian sediments. Chem. Geol. 121:1995;345-357.
53. O'Brien P.J., Carswell D.A., Gebauer D. Eclogite formation and distribution in the Central European Variscides. Carswell D.A. Eclogite Facies Rocks. 1990;204-220 Blackie, New York.
54. Ochsner, A., 1993. U-Pb Geochronology of the Upper Proterozoic-Lower Paleozoic Geodynamic Evolution in the Ossa-Morcna Zone (SW Iberia): Constraints on the timing of the Cadomian Orogeny. Unpubl. Ph.D. thesis, ETH Zurich, 249 pp.
55. Ordóñez, C.B., 1999. Geochronological studies of the Pre-Mesozoic basement of the Iberian Massif: the Ossa Morena zone and the Allochthonous Complexes within the Central Iberian zone. PhD thesis, E.T.H. Zürich 235pp.
56. Ordóñez, C.B., Gebauer, D., Eguíluz, L., 1997. Late Cadomian formation of two anatectic gneiss domes in the Ossa Morena zone: Monesterio and Mina Afortunada. XIV Reunião de Geologia do Oeste Peninsular, Vila Real, Abstr., 161-164.
57. Ordóñez, C.B., Gebauer, D., Eguíluz, L., 1997. SHRIMP zircon ages dating protolith formation of orthogneisses and their Hercynian migmatization: results from the Coimbra-Badajoz-Córdoba shear belt. XIV Reunião de Geologia do Oeste Peninsular, Vila Real, Abstr., 165-168.
58. Ordóñez, C.B., Gebauer, D., Schäfer, H.J., Gil Ibarguchi, J.I., Peucat, J.J., 1995. SHRIMP-dating of zircons from the ultramafic-mafic HP/HT-rocks of the Cabo Ortegal Complex and its country rocks (Galicia, NW Spain). In: Barsczus HG, Gervilla F (eds.), 2nd International Workshop on Orogenic Lherzolites and mantle-processes (Granada). Abstr. 1, 44-45.
59. Ordóñez C.B., Gebauer D., Schäfer H.J., Gil Ibarguchi J.I., Peucat J.J. A single subduction event at ca. 392 Ma for the ultramafic-mafic HP/HT-rocks of the Cabo Ortegal Complex. Geogaceta. 20:(2):1996;489-490.
60. Paquette J.L., Peucat J., Bernard-Griffiths J., Marchand J. Evidence for old Precambrian relics shown by U-Pb zircon dating of eclogites and associated rocks in the Hercynian belt of South Brittany, France. Chem. Geol. 52:1985;203-216.
61. Peucat J.J., Bernard-Griffiths J., Gil Ibarguchi J.I., Dallmeyer R.D., Menot R.P., Cornichet J., Iglesias Ponce de Leon M. Geochemical and geochronological cross section of the deep Variscan crust: The Cabo Ortegal high-pressure nappe (northwestern Spain). Tectonophysics. 177:1990;263-292.
62. Pigdeon R.T. Recrystallization of oscillatory zoned zircon: some geochronological and petrological implications. Contrib. Mineral. Petrol. 110:1992;463-472.
63. Pin C. Variscan oceans: Ages, origins and geodynamic implications inferred from geochemical and radiometric data. Tectonophysics. 177:1990;215-227.
64. Priem H.N.A., Boelrijk N.A.I.M., Verschure R.H., Hebeda E.H., Verdurmen E.A.Th. Dating events of acid plutonism through the Paleozoic of the Western Iberian Peninsula. Eclogae Geol. Helv. 63/1:1970;255-274.
65. von Quadt A. U-Pb zircon and Sm-Nd geochronology of mafic and ultramafic rocks from the central part of the Tauern Window (eastern Alps). Contrib. Mineral. Petrol. 110:1992;57-67.
66. Quadt A. U-Pb zircon and Sr-Nd-Pb whole-rock investigations from the continental deep drilling (KTB). Geol. Rundsch. 86:1997;S258-S271.
67. Quadt A., Gebauer D. Sm-Nd and U-Pb dating of eclogites and granulites from the Oberpfalz, NE Bavaria, Germany. Chem. Geol. 109:1993;317-339.
68. von Quadt A., Gebauer D. Evolution of eclogitic rocks in the Erzgebirge: A conventional and SHRIMP U-Pb zircon and Sm-Nd study. Acta Univ. Carol., Geol. 42:(2):1998;324-325.
69. Ribeiro M.L., Andriessen P.A.M., Beetsma J.J., Ferreira N., Oen I.S. Precambrian Sm-Nd age of UATC of Morais Massif (NE Portugal). Terra Nova. 5:(Abstr. Suppl. 1):1993;333.
70. Ries A.C., Shackleton R.M. Catazonal complexes of northwest Spain and north Portugal, remnants of a Hercynian thrust plate. Nature Phys. Sci. 234:1971;65-79.
71. Rubatto, D., 1998. Dating of pre-Alpine magmatism, Jurassic ophiolites and Alpine subductions in the Western Alps. PhD Thesis, E.T.H. Zürich 173pp.
72. Sánchez Rodríguez L., Gebauer D., Gil Ibarguchi J.I., Tubía J.M. Further U-Pb SHRIMP age-results on rocks from the Ronda Complex and its country rocks: very fast uplift and cooling rates. Terra Nova. 9:(Abstr. Suppl. 1):1997;31.
73. Santos J.F., Marqués F.O., Munhá J., Ribeiro A., Tassinari C. First dating of a Precambrian (1.0 to 1.1 Ga) HP/HT metamorphic event in the uppermost allochthonous unit of the Braganca massif (Iberian Variscan chain, northern Portugal). Terra Nova. 9:(Abstr. Suppl. 1):1997;497.
74. Santos J.F., Marqués F.O., Munhá J., Tassinari C. A new isotopic tale for Braganca eclogites (NE Portugal). Terra Nova. (Abstr. Suppl. 1):1995;108.
75. Santos Zalduegui J.F., Schärer U., Gil Ibarguchi J.I. Isotope constraints on the age and origin of magmatism and metamorphism in the Malpica-Tuy allochton, Galicia, NW Spain. Chem. Geol. 121:1995;91-103.
76. Santos Zalduegui J.F., Schärer U., Gil Ibarguchi J.I., Girardeau J. Origin and evolution of the Paleozoic Cabo Ortegal ultramafic-mafic complex (NW Spain): U-Pb, Rb-Sr and Pb-Pb isotope data. Chem. Geol. 129:1996;281-304.
77. Schäfer H.J., Gebauer D., Gil Ibarguchi J.J., Peucat J.J. Ion-microprobe U-Pb zircon dating on the HP/HT Cabo Ortegal Complex (Galicia, NW Spain): Preliminary results. Terra Nova. (Abstr. Suppl. 5):1993;22.
78. Schäfer J., Neurot H., Ahrendt H., Dörr W., Franke W. Accretion and exhumation at a Variscan active margin, recorded in the Saxothuringian flysch. Geol. Rundsch. 86:1997;599-611.
79. Serrano Pinto, M., Casquet, C., Ibarrola, E., Corretgé, L.G., Portugal Ferreira, M., 1987. Síntese geocronológica dos granitoides do Maciço Hespérico. In: Bea, F., Carnicero, A., Gonzalo, J.C., López Plaza, M., Rodríguez Alonso, M.D. (Eds.), Geología de los granitoides y rocas asociadas del Macizo Hespérico, Rueda, Madrid: pp. 69-86.
80. Spencer, D., Gebauer, D., 1996. SHRIMP evidence for a Permian protolith age and a 44 Ma metamorphic age for the Himalayan eclogites (upper Kaghan, Pakistan): implications for the subduction of Tethys and the subdivision terminology of the NW Himalaya. 11th himalayan-karkorum-Tibet workshop, Abstr.: 147-150.
81. Stosch H.G., Lugmair G.W. Geochemistry and evolution of MORB-type eclogites from the Münchberg Massif/southern Germany. Earth Planet. Sci. Lett. 99:1990;230-249.
82. Valverde V.P., Fernández F.J. Edad de enfriamiento U/Pb en rutilos del Gneiss de Chimparra (Cabo Ortegal, NO de España). Geogaceta. 20:(2):1996;475-478.
83. van Calsteren P.W.C., Boelrijk N.A.I.M., Hebeda E.H., Priem H.N.A., Den Tex E., Verdurmen E.A.Th., Verschure R.H. Isotopic dating of older elements (including the Cabo Ortegal mafic-ultramafic complex) in the Hercynian orogen of NW Spain: manifestations of a presumed Early Paleozoic mantle-plume. Chem. Geol. 24:1979;35-56.
84. Vavra G., Gebauer D., Schmidt R., Compston W. Multiple zircon growth and recrystallization during polyphase Late Carboniferous to Triassic metamorphism in granulites of the Ivrea Zone (Southern Alps): an ion microprobe (SHRIMP) study. Contrib. Mineral. Petrol. 122:1996;337-358.
85. Vogel D.E. Petrology of an eclogite and pyrigarnite-bearing polymetamorphic rock complex at Cabo Ortegal, NW Spain. Leidse Geol. Med. 40:1967;121-213.
86. Vogel D.E. Cabo Ortegal, mantle plume or double klippe? Geol. Mijnbouw. 63:1984;131-140.
87. Vogel D.E., Abdel Monem A.A. Radiometric evidence for a Precambrian metamorphic event in NW Spain. Geol. Mijnbouw. 50:1971;749-750.
88. Wetherill G.S. Discordant uranium-lead ages, I. Trans. Am. Geophys. Union. 37:1956;320-326.
89. Zeck H.P., Albat F., Hansen B.T., Torres Roldán R.L., García Casco A., Martín Algarra A. A 21±2 Ma age for the termination of the ductile Alpine deformation in the internal zone of the Betic Cordilleras, South Spain. Tectonophysics. 169:1989;215-220.
90. Zeck H.P., Monié P., Villa I.M., Hansen B.T. High rates of cooling and uplift in the Betic Cordilleras, S. Spain. Alpine lithospheric slab detachment, mantle diapirism and extensional tectonics. Geology. 20:1992;79-82.