serie NOVA TERRA nº 49

133 late Ediacaran (ca. 560 – 550 Ma; Pereira et al., 2008 ), whereas some of the metaigneous felsic rocks have been dated at Cambrian (ca. 530 – 505 Ma; Chichorro et al., 2008 ). This sequence has been divided in two members (e.g., Carvalhosa and Zbyszewski, 1994; Chichorro, 2006 ), a lower one referred to as Escoural Unit and equivalent to the Ediacaran Serie Negra Formation proposed by Carvalhosa (1965) , and an upper member referred to as Monfurado Unit, which is regionally considered as an Early Cambrian succession ( Fig. 3 c). Above the high-P sequence succeeds a thick pile ( N 1 km thick) of metabasites alternating with minor metasedimentary rocks ( Fig. 3 d). This upper sequence is named Carvalhal Unit, and has been divided in two members ( Carvalhosa and Zbyszewski, 1994; Chichorro, 2006 ). The lower one has relatively higher metamorphic degree (mylonitic amphib- olites and mica schists) and the metabasites show E-MORB af fi nity ( Pereira et al., 2007 ). The upper member has lower metamorphic degree (greenschists and phyllites) and the metabasites show N-MORB af fi nity Figure 3 Figure 2 SECTIONF SECTIONE SECTIOND SECTIONA SECTIONC SECTIONB 37°N 38°N 39°N 40°N 41°N 43°N 9°W 7°W 6°W 5°W N 0 50 km CU OVD IOMZO SOUTH-PORTUGUESE ZONE CMU CA OSSA-MORENA ZONE CO CANTABRIAN ZONE GALICIA-TRÁS-OS- MONTES ZONE PTSZ PTSZ PTSZ RF MAIN THRUSTS (PARTLYREWORKEDASNORMALFAULTS) STRIKE-SLIP SHEAR ZONES NORMAL FAULTS RHEIC SUTURE (REWORKED) LLSZ OF AF CF VF ET PG-CVD MLSZ PRSZ CROSS-SECTIONS (A-F) INCLUDED IN FIGURE 3 W E S T AS T U R I A N -L E O N E S E Z O N E SOUTH-PORTUGUESE ZONE (LAURUSSIAN FORELAND) BEJA-ACEBUCHES OPHIOLITE (REWORKED RHEIC SUTURE) UPPERALLOCHTHONOUS UNITS ALLOCHTHONOUS OPHIOLITIC UNITS (INTRA-GONDWANA SUTURE) BASALALLOCHTHONOUS UNITS (LATE DEVONIAN HIGH-PRESSURE BELT) IBERIAN PARAUTOCHTHON IBERIANAUTOCHTHON CANTABRIAN ZONE GONDW. FORELAND IBERIAN ALLOCHTHON LFT BToIP BToIP BToIP MF HF EsT EsT ZSI PG-CVD LPSZ LPSZ SISZ MLSZ J-PCSZ BAO SEVILLA CÓRDOBA ÉVORA BADAJOZ LISBOA CÁCERES COIMBRA PORTO SALAMANCA ÁVILA MADRID BRAGANÇA PONTEVEDRA ACORUÑA LUGO OVIEDO SECTIONA SECTIONB SECTIOND SECTIONE SECTIONF ESE WNW NE SW Rheic suture (reworked) LLF OF AF HF CF PG-CVD MLF RF PRF VF ET NW Iberia SW Iberia CABO ORTEGAL COMPLEX ÓRDENES COMPLEX MALPICA-TUI COMPLEX OSSA-MORENA COMPLEX 0 50 km SECTIONC (a) (b) Fig. 1. (a) Geological map showing the distribution of autochthonous and allochthonous terranes of the Iberian Massif ( Díez Fernández and Arenas, 2015 ). Locations of the Évora Massif ( Fig. 2 ) and Cabrela-Carvalhal synform ( Fig. 3 ) are indicated. (b) Composite cross-section. Abbreviations: AF — Azuaga Fault; BToIP — Basal Thrust of the Iberian Parautochthon; BAO — Beja – Acebuches Ophiolite; CA — Carvalhal Amphibolites; CF — Canaleja Fault; CMU — Cubito – Moura Unit; CO — Calzadilla Ophiolite; CU — Central Unit; EsT — Espiel Thrust; ET — Espina Thrust; HF — Hornachos Fault; IOMZO — Internal Ossa-Morena Zone Ophiolites; J – PCSZ — Juzbado-Penalva do Castelo Shear Zone; LFT — Lalín-Forcarei Thrust; LPSZ — Los Pedroches Shear Zone; LLSZ — Llanos Shear Zone; MLSZ — Malpica – Lamego Shear Zone; MF — Matachel Fault; OF — Onza Fault; OVD — Obejo – Valsequillo Domain; PG – CVD — Puente Génave – Castelo de Vide Detachment; PRSZ — Palas de Rei Shear Zone; PTSZ — Porto – Tomar Shear Zone; RF — Riás Fault; SISZ — South Iberian Shear Zone; VF — Viveiro Fault; and ZSI — Zalamea de la Serena Imbricates. 287 R.D. Fernández et al. / Lithos 268 – 271 (2017) 285 – 301