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6. PROVENANCE OF THE HP-HT UPPER ALLOCHTHON
N
(a)
(b)
(c)
Fig. 2
0
250
500 km
External thrust belt
and foredeep basin
Allochthonous terranes with
ophiolites and high-P rocks
Parautochthon/
Lower allochthon
Gondwanan zones with
strong Cadomian imprint
Gondwanan zones with
Early Ordovician magmatism
Variscan miogeocline fold
and thrust metamorphic belt
Variscan foreland
thrust belt
Magnetic lineaments
Variscan strike-slip
Shear zones
MainVariscan thrusts
separating zones
EUROPEAN VARISCIDES
Alpine Front
CIA
IAA
MCA
BA
Iberian
Massif
Massif
Central
Armorican
Massif
Alpine
Front
Rhenish
Massif
Bohemian
Massif
WALZ
CZ
GTMZ
Z
S
T
P
ZSPJ
CIZ
Z
S
P
L
OMZ
SPZ
ZSIS
ZSCB
FPN
0
5
10 km
Late Variscan high-angle fault
Thrust fault
High-angle fault
Thrust fault
Syncline
Anticline
Variscan granitoids
AUTOCHTHONOUS SEQUENCES
LOWER ALLOCHTHON - PARAUTOCHTHON
(SCHISTOSE DOMAIN)
Phyllites, phyllonites, sandstones
carbonaceous schists and black cherts
Rhyolites and minor dacites
Quartzites
Greenschists facies metasediments
INTERMEDIATE-P UPPER UNITS
HIGH-P-HIGH-T UPPER UNITS
Paragneisses with inclusions
of eclogites (Banded Gneisses)
Ultramafic rocks
(Limo, Herbeira and Uzal massifs)
Mafic and intermediate granulites
and amphibolites (Bacariza Fm.)
Eclogites (rare augengneiss alternations)
High T amphibolites, granulites and
coronitic metagabbros (Candieira Fm.)
Paragneisses with granulite-facies
mafic inclusions (Chimparra Gneisses)
Metagabbros
High temperature amphibolites
(Peña Escrita Fm.)
Amphibolite-facies paragneisses
(Cariño Gneisses)
Quaternary
COVER
UPPER OPHIOLITIC UNITS
LOWER OPHIOLITIC UNITS
BASAL UNITS
MÉLANGE UNIT
Serpentinite-phyllite mélange
High temperature tectonic blocks
(orthogneisses and amphibolites)
Serpentinite mélange
Felsic orthogneisses and amphibolites
(minor retroeclogites and schists)
Greenschists
Phyllites and schists
Serpentinites
Amphibolites
8º
7º 50’
Espasante
Cariño
Punta dos Aguillóns
Cabo Ortegal
O Picón
Loiba
San Andrés
de Teixido
Chimparra
Cedeira
Cerdido
Campo do
Hospital
Ponte de
Mera
Moeche
San
Somozas
As Pontes
Sadurniño
Ortigueira
SECTION B
SECTIONA
Punta Candieira
Punta
Chirlateira
Punta do Limo
43º 40’
8º
7º 50’
43º 40’
WNW
ESE
CedeiraUnit
ACapelada
Unit
Concepenido
MeraBay
PuntaCandieira
SECTIONB
SECTIONA
Somozas
Mélange
Moeche
Unit
Espasante
Unit
Schistose
Domain
PurridoUnit
Autochthonous
sequences
CariñoUnit
ACapelada
Unit
Fig. 1.
Geological map of the European Variscides (a) based on Martınez Catalan (2011). Geological map (b) and cross-section
(c) of the NW Iberian Cabo Ortegal Complex. The location of Fig. 2 geological map is also shown. Based on Vogel (1967),
Marcos
et al.
(1984), Arenas (1988), Arenas
et al.
(2014b). The Upper Allochthon is formed by the intermediate-pressure upper
units and the high-
P
–
high-
T
upper units.
©
2015 John Wiley & Sons Ltd
960
R. ALBERT
ET AL.
110