arc environments. The early Paleozoic arc of NW Iberia revisited. Terra Nova 19,
432
–
439.
Abati, J., Gerdes, A., Fernández-Suárez, J., Arenas, R., Whitehouse, M.J., Díez Fernández, R.,
2010.
Magmatism and early-Variscan continental subduction in the northern Gond-
wana margin recorded in zircons from the basal units of Galicia, NW Spain.
Geological Society of America Bulletin 122, 219
–
235.
Andonaegui,P.,Castiñeiras,P.,GonzálezCuadra,P.,Arenas,R.,SánchezMartínez,S., Abati,
J., Díaz García, F., Martínez Catalán, J.R., 2012.
The Corredoiras orthogneiss (NW
Iberian Massif): geochemistry and geochronology of the Paleozoic magmatic suite
developed in a peri-Gondwanan arc. Lithos 128
–
131, 84
–
99.
Arenas, R., Gil Ibarguchi, J.I., González Lodeiro, F., Klein, E., Martínez Catalán, J.R., Ortega
Gironés, E., de Pablo Maciá, J.G., Peinado, M., 1986.
Tectonostratigraphic units in the
complexes with ma
fi
c and related rocks of the NW of the Iberian Massif. Hercynica
2, 87
–
110.
Arenas, R., Rubio Pascual, F.J., Díaz García, F., Martínez Catalán, J.R., 1995.
High-
pressure microinclusions and development of an inverted metamorphic gradient
in the Santiago Schists (Órdenes Complex, NW Iberian Massif, Spain): evidence
of subduction and syn-collisional decompression. Journal of Metamorphic
Geology 13, 141
–
164.
Arenas, R., Abati, J., Martínez Catalán, J.R., Díaz García, F., Rubio Pascual, F.J., 1997.
P-T
evolution of eclogitesfrom theAgualada Unit (Órdenes Complex, NW Iberian Massif,
Spain): implications for crustal subduction. Lithos 40, 221
–
242.
Arenas, R., Martínez Catalán, J.R., Sánchez Martínez, S., Fernández-Suárez, J., Andonaegui,
P., Pearce, J.A., Corfu, F., 2007a.
The Vila de Cruces Ophiolite: a remnant of the early
RheicOcean intheVariscan suture ofGalicia (NWIberian Massif). Journal ofGeology
115, 129
–
148.
Arenas, R.,MartínezCatalán,J.R.,SánchezMartínez, S.,DíazGarcía,F.,Abati,J., Fernández-
Suárez, J., Andonaegui, P., Gómez-Barreiro, J., 2007b.
Paleozoic ophiolites in the
Variscan suture of Galicia (northwest Spain): distribution, characteristics and
meaning. In: Hatcher Jr., R.D., Carlson, M.P., McBride, J.H., Martínez Catalán, J.R.
(Eds.), 4-D Framework of Continental Crust. Geological Society of America Memoir,
200, pp. 425
–
444.
Arenas, R., Sánchez Martínez, S., Castiñeiras, P., Jeffries, T.E., Díez Fernández, R.,
Andonaegui, P., 2009.
The basal tectonic mélange of the Cabo Ortegal Complex
(NW Iberian Massif): a key unit in the suture of Pangea. Journal of Iberian Geology
35, 85
–
125.
Arenas, R., Sánchez Martínez, S., Gerdes, A., Albert, R., Díez Fernández, R., Andonaegui, P.,
2013. Re-interpreting the Devonian ophiolites involved in the Variscan suture: U
–
Pb
and Lu
–
Hf zircon data of the Moeche Ophiolite (Cabo Ortegal Complex, NW Iberia).
International Journal of Earth Sciences.
http://dx.doi.org/10.1007/s00531-013-0880-x(in press).
Ballèvre, M., Bosse, V., Ducassou, C., Pitra, P., 2009.
Palaeozoic history of the Armorican
Massif: models for the tectonic evolution of the suture zones. Comptes Rendus
Geoscience 341, 174
–
201.
Ballèvre,M.,Bosse,V., Ducassou,C.,Paquette, J.L.,Peucat, J.J., Pitra, P.,Poujol,M.,Ruffet, G.,
2012.
Geometryand correlation ofthe nappe stack in theIbero-Armorican arcacross
the Bay of Biscay: a joint French
–
Spanish project. Part 1: the data. Géologie de la
France 1, 60
–
61.
Beaumont, C., Jamieson, R.A., Butler, J.P., Warren, C.J., 2009.
Crustal structure: a key
constraint on the mechanism of ultra-high-pressure rock exhumation. Earth and
Planetary Science Letters 287, 116
–
129.
Clark,A.H.,Scott,D.J.,Sandeman,H.A.,Bromley,A.V.,Farrar,E.,1998.
Siegeniangeneration
oftheLizardophiolite:U
–
Pbzirconagedataforplagiogranite,Porthkerries,Cornwall.
Journal of the Geological Society of London 155, 595
–
598.
Coleman,R.G.,Lee, D.E.,Beatty,L.B.,Brannock, W.W.,1965.
Eclogitesandeclogites
—
their
differences and similarities. Geological Society of America Bulletin 76, 483
–
508.
Dallmeyer, R.D., Martínez Catalán, J.R., Arenas, R., Gil Ibarguchi, J.I., Gutiérrez Alonso, G.,
Farias, P., Aller, J., Bastida, F., 1997.
Diachronous Variscan tectonothermal activity
in the NW Iberian Massif: evidence from
40
Ar/
39
Ar dating of regional fabrics.
Tectonophysics 277, 307
–
337.
Díaz García, F., Arenas, R., Martínez Catalán, J.R., González del Tánago, J., Dunning, G.R.,
1999.
Tectonic evolution of the Careón Ophiolite (northwest Spain): a remnant of
oceanic lithosphere in the Variscan Belt. Journal of Geology 107, 587
–
605.
Díaz García, F., Sánchez Martínez, S., Castiñeiras, P., Fuenlabrada, J.M., Arenas, R., 2010.
A
peri-GondwananarcinNWIberia.II:assessmentoftheintra-arctectonothermalevo-
lutionthroughU
–
PbSHRIMPdatingofma
fi
cdykes.GondwanaResearch17,352
–
362.
Díez Fernández, R., Martínez Catalán, J.R., Gerdes, A., Abati, J., Arenas, R., Fernández-
Suárez, J., 2010.
U
–
Pb ages of detrital zircons from the basal allochthonous units of
NW Iberia: provenance and paleoposition on the northern margin of Gondwana
during the Neoproterozoic and Paleozoic. Gondwana Research 18, 385
–
399.
DíezFernández,R.,Castiñeiras,P.,Gómez Barreiro,J.,2012a.
Ageconstraints onLowerPa-
leozoic convection system: magmatic events in the NW Iberian Gondwana margin.
Gondwana Research 21, 1066
–
1079.
Díez Fernández, R., Martínez Catalán, J.R., Arenas, R., Abati, J., 2012b.
The onset of the
assembly of Pangaea in NW Iberia: constraints on the kinematics of continental
subduction. Gondwana Research 22, 20
–
25.
Díez Fernández, R., Foster, D.A., Gómez Barreiro, J., Alonso-García, M., 2013. Rheological
control on the tectonic evolution of a continental suture zone: the Variscan example
from NW Iberia (Spain). International Journal of Earth Sciences.
http://dx.doi.org/10.1007/
s00531-013-0885-5 .Dubi
ń
ska, E., Bylina, P., Kozlowski, A., Dörr, W., Nejbert, K., 2004.
U
–
Pb dating of
serpentinization: hydrothermal zircon from a metasomatic rodingite shell (Sudetic
ophiolite, SW Poland). Chemical Geology 203, 183
–
203.
Faryad, S.W., Kachlík, V., 2013.
New evidence of blueschist facies rocks and their
geoectonic implication for Variscan suture (s) in the Bohemian Massif. Journal of
Metamorphic Geology 31, 63
–
82.
Fernández-Suárez, J., Díaz García, F., Jeffries, T.E., Arenas, R., Abati, J., 2003.
Con-
straints 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.
Fernández-Suárez, J., Arenas, R., Abati, J., Martínez Catalán, J.R., Whitehouse, M.J.,
Jeffries, T.E., 2007.
U
–
Pb chronometry of polymetamorphic high-pressure granu-
lites: an example from the allochthonous terranes of the NW Iberian Variscan
belt. In: Hatcher Jr., R.D., Carlson, M.P., McBride, J.H., Martínez Catalán, J.R.
(Eds.), 4
–
D Framework of Continental Crust. Geological Society of America
Memoir, 200, pp. 469
–
488.
Fuenlabrada, J.M., Arenas, R., Sánchez Martínez, S., Díaz García, F., Castiñeiras, P.,
2010.
A peri-Gondwana arc in NW Iberia. I: isotopic and geochemical constraints
on the origin of the arc
—
a sedimentary approach. Gondwana Research 17,
338
–
351.
Fuenlabrada, J.M., Arenas, R., Díez Fernández, R., Sánchez Martínez, S., Abati, J., López
Carmona, A., 2012.
Sm
–
Nd isotope geochemistry and tectonic setting of the
metasedimentary rocks from the basal allochthonous units of NW Iberia (Variscan
suture, Galicia). Lithos 148, 196
–
208.
García-Casco,A.,Iturralde-Vinent,M.A.,Pindell,J.,2008.
LatestCretaceouscollision/accretion
between the Caribbean plate and Caribeana: origin of metamorphic terranes in the
Greater Antilles. International Geology Review 50, 781
–
809.
Gómez Barreiro,J.,MartínezCatalán,J.R.,Arenas,R.,Castiñeiras,P.,Abati,J.,DíazGarcía,F.,
Wijbrans, J.R., 2007.
Tectonic evolution of the upper allochthon of the Órdenes
complex (northwestern Iberian Massif): Structural constraints to a polyorogenic
peri-Gondwanan terrane. In: Linneman, U., Nance, R.D., Kraft, P., Zulauf, G. (Eds.),
The Evolution of the Rheic Ocean: From Avalonian-Cadomian Active Margin to
Alleghenian-Variscan Collision. Geological Society of America Special Paper, 423,
pp. 315
–
332.
Kroner,U.,Romer, R.L.,2013.
Twoplates
—
manysubduction zones: theVariscan orogeny
reconsidered. Gondwana Research 24, 298
–
329.
Kryza, R., Pin, C., 2010.
The Central-Sudetic ophiolites (SW Poland): petrogenetic
issues, geochronology and palaeotectonic implications. Gondwana Research 17,
292
–
305.
Lardeaux,J.M.,Ledru,P.,Daniel,I.,Duchene,S.,2001.
TheVariscanFrenchMassifCentral
—
a
newadditiontotheultra-highpressuremetamorphic
‘
club
’
:exhumationprocessesand
geodynamic consequences. Tectonophysics 332, 143
–
167.
López Carmona, A., Pitra, P., Abati, J., 2013.
Blueschist-facies metapelites from the
Malpica-Tui Unit (NW Iberian Massif): phase equilibria modelling and H
2
O and
Fe
2
O
3
in
fl
uence in high-pressure assemblages. Journal of Metamorphic Geology 31,
263
–
280.
Martínez Catalán, J.R., 2011.
Are the oroclines of the Variscan belt related to late Variscan
strike-slip tectonics? Terra Nova 23, 241
–
247.
MartínezCatalán, J.R.,Arenas, R.,Abati,J., SánchezMartínez, S.,DíazGarcía,F.,Fernández-
Suárez, J., González Cuadra, P., Castiñeiras, P., Gómez Barreiro, J., Díez Montes, A.,
González Clavijo, E., Rubio Pascual, F.J., Andonaegui, P., Jeffries, T.E., Alcock, J.E., Díez
Fernández, R., López Carmona, A., 2009.
A rootless suture and the loss of the roots
of a mountain chain: the Variscan belt of NW Iberia. Comptes Rendus Geoscience
341, 114
–
126.
Matte, P., 2001.
The Variscan collage and orogeny (480
–
290 Ma) and the tectonic
de
fi
nition of the Armorica microplate: a review. Terra Nova 13, 122
–
128.
Murphy, J.B., Nance, R.D., 2008.
The Pangea conundrum. Geology 36, 703
–
706.
Murphy, J.B., Cousens, B.L., Braid, J.A., Strachan, R.A., Dostal, J., Keppie, J.D., Nance, R.D.,
2011.
Highly depleted oceanic lithosphere in the Rheic Ocean: implications for
Paleozoic plate reconstructions. Lithos 123, 165
–
175.
Nance, R.D., Gutiérrez-Alonso, G., Keppi, J.D., Linnemann, U., Murphy, J.B., Quesada, C.,
Strachan, R.A., Woodcock, N.H., 2010.
Evolution of the Rheic Ocean. Gondwana
Research 17, 194
–
222.
Nutman, A.P., Green, D.H., Cook, C.A., Styles, M.T., Holdsworth, R.E., 2001.
SHRIMP U
–
Pb
zircon dating of the exhumation of the Lizard Peridotite and its emplacement over
crustal rocks: constraints for tectonic models. Journal of the Geological Society of
London 158, 809
–
820.
Ordóñez Casado, B., Gebauer, D., Schäfer, H.J., Gil Ibarguchi, J.I., 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.
Pin, C., Paquette, J.L., Santos Zalduegui, J.F., Gil Ibarguchi, J.I., 2002.
Early Devonian supra-
subduction zone ophiolite related to incipient collisional processes in the Western
Variscan Belt: the Sierra de Careón unit, Órdenes Complex, Galicia. In: Martínez
Catalán, J.R., Hatcher Jr., R.D., Arenas, R., Díaz García, F. (Eds.), Variscan-Appalachian
Dynamics: The Building of the Late Paleozoic Basement. Geological Society of
America Special Paper, 364, pp. 57
–
71.
Pin, C., Paquette, J.L., Ábalos, B., Santos, J.F., Gil Ibarguchi, J.I., 2006.
Composite origin of an
early Variscan transported suture: Ophiolitic units of the Morais Nappe Complex
(north Portugal). Tectonics 25, 1
–
19.
Platt,J.P.,1986.
Dynamicoforogenicwedgesandtheupliftofhigh-pressuremetamorphic
rocks. Geological Society of America Bulletin 97, 1037
–
1053.
Rodríguez, J., Cosca, M.A., Gil Ibarguchi, J.I., Dallmeyer, R.D., 2003.
Strain partitioning and
preservation of
40
Ar/
39
Ar ages during Variscan exhumation of a subducted crust
(Malpica-Tui Complex, NW Spain). Lithos 70, 111
–
139.
Sánchez Martínez, S., Arenas, R., Díaz García, F., Martínez Catalán, J.R., Gómez Barreiro, J.,
Pearce, J., 2007.
The Careón Ophiolite, NW Spain: supra-subduction zone setting for
the youngest Rheic Ocean
fl
oor. Geology 35, 53
–
56.
Sánchez Martínez, S., Arenas, R., Gerdes, A., Castiñeiras, P., Potrel, A., Fernández-Suárez, J.,
2011.
Isotope geochemistry and revised geochronology of the Purrido Ophiolite
(Cabo Ortegal Complex, NW Iberian Massif): Devonian magmatism with mixed
sources and involved Mesoproterozoic basement. Journal of the Geological Society
of London 168, 733
–
750.
762
R. Arenas et al. / Gondwana Research 25 (2014) 756
–
763
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