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Abstracts Book GONDWANA 15 North meets South NDWANA GO 15 NORTH meets SOUTH MADRID 2014 ABSTRACTS BOOK 14-18 July 2014, Madrid (Spain) GONDWANA 15 North meets South Madrid (Spain) 14-18 July, 2014 COORDINATORS César Casquet Universidad Complutense de Madrid Instituto de Geociencias (CSIC-UCM), SPAIN Juan Carlos Gutiérrez-Marco Instituto de Geociencias (CSIC-UCM), SPAIN Javier Fernández-Suárez Universidad Complutense de Madrid Instituto de Geociencias (CSIC-UCM), SPAIN EDITORS Robert J. Pankhurst (BGS, UK) Pedro Castiñeiras (UCM, SPAIN) Sonia Sánchez Martínez (UCM, SPAIN) Meeting venue Superior Technical School of Mines i ORGANISING COMMITTEE Ricardo Arenas (Universidad Complutense, Madrid) Jacobo Abati (Universidad Complutense, Madrid) Pedro Castiñeiras (Universidad Complutense, Madrid) Diego García-Bellido (University of Adelaide, Australia) Enrique Díaz-Martínez (Instituto Geológico y Minero de España, Madrid) Ricardo Castroviejo (Superior School of Mining Engineers, ETSIM, Spain) Francisco Pereira (University of Évora, Portugal) Jean-Paul Liegeois (Royal Museum for Central Africa, Tervuren, Belgium) Ulf Linnemann (Museum für Mineralogie und Geologie Sektion Geochronologie, Dresden, Germany) Nasser Ennih (University El Jadida, Morocco) Udo Zimmermann (University of Stavanger, Norway) TREASURER AND REGISTRATION Sonia Sánchez Martínez (Universidad Complutense de Madrid, UCM, Spain) ii SCIENTIFIC COMMITTEE Miguel Basei (Brasil) Umberto Cordani (Brasil) Carlos Rapela (Arg) Robert Pankhurst (U.K.) Víctor Ramos (Argentina) Peter Cawood (Australia) Alan Collins (Australia) Maarten de Wit (S. Africa) Brendan Murphy (Canada) Axel Gerdes (Germany) Ulf Linnemann (Germany) Javier Álvaro (Spain) Madhava Santosh (India, China) Ian Dalziel (USA) COLLABORATORS Carmen Galindo (Tenured Professor, UCM) Alicia López Carmona (Postdoctoral research fellow, UCM) Richard Albert (PhD student, UCM) Enrique Merino (PhD student, UCM) Ana Filipa Montóia Jacinto (Graduate student, Lisbon University) Irene Novo Fernández (Graduate student, UCM) Alejandro Ramiro Camacho (Graduate student, UCM) Andrea Mazón Carro (Graduate student, UCM) Francisco Javier López Acevedo (Honorary collaborator, UCM) iii SPONSORS Geological Society of Spain Superior School of Mining Engineers of Madrid Spanish Geological Survey - IGME Universidad Complutense de Madrid Institute of Geosciences IGEO (CSIC, UCM) International Association for Gondwana Research IGCP Projects 574, 591, 596, 597 & 628 (IUGS-UNESCO) iv PAST GONDWANA MEETINGS Gondwana 1; 1967 Mar del Plata, Argentina Gondwana 2; 1970 Cape Town & Johannesburg, South Africa Gondwana 3; 1973 Canberra, Australia Gondwana 4; 1977 Calcultta, India Gondwana 5; 1980 Wellinton, New Zealand Gondwana 6; 1985 Ohio, USA Gondwana 7; 1988 São Paulo, Brazil Gondwana 8; 1991 Hobart, Tasmania Gondwana 9; 1994 Hyderabad, India Gondwana 10; 1998 Cape Town, South Africa Gondwana 11; 2002 Christchurch, New Zealand Gondwana 12; 2005 Mendoza, Argentina Gondwana 13; 2008 Dali, China Gondwana 14; 2011 Búzios, Brazil Gondwana 15; 2014 Madrid, Spain v SESSIONS 1) Gondwana assembly: Neoproterozoic to Cambrian 2) Margins of Gondwana a. The Proto-Andean margin b. The northern margin and the peri Gondwanan terranes c. The accretion to Laurussia: the Varsican Orogeny d. The southern margin e. The Gondwana orogeny (cancelled) 3) Processes in Gondwana away from the margins (cancelled) 4) Gondwana break-up and dispersal: sedimentary record, magmatism and geodynamics 5) Ore deposits and Gondwana evolution 6) Record of paleo-climatic events in Gondwana (cancelled) 7) Gondwana biota 8) Paleomagnetic constraints on the Gondwana paleo- geographical evolution (cancelled) 9) Gondwana to Asia (reduced) vi FOREWORD This Gondwana Symposium takes place for the first time in Europe. It is the 15th of a series of symposia that started 47 years ago in Mar del Plata (Argentina) and which have persisted to date every three years. The symposia were formerly run under the auspices of the IUGS and have been overseen by the Gondwana Committee, currently chaired by Dr. Renata Schmitt of Universidad Federal do Rio de Janeiro. Nowadays the Gondwana Symposium has consolidated the efforts of geoscientists involved in one or more of the many issues involved in the formation, evolution and dispersal of this supercontinent. The topics are relevant to scientists from many different areas and countries. On this occasion the number of attendants is close to 180 which is quite impressive if we consider the many difficulties that geoscientists in general and those interested in basic science in particular are now experiencing. The past few years have been -and still are- times of economic crisis- which for Spain has meant severe cuts in research budgets for all disciplines. Also the timing of the conference in July has discouraged many from attending because it falls within the busiest part of the year at universities and research centres in the southern hemisphere – and it has to be admitted that summer in Madrid is quite hot. The syponsium will be held at the Superior Technical School of Mines. This institution was first founded in 1777 in Almadén, as an Academy of Mines next to this well-known and world-class Hg-mining district. This was only ten years after the first Academy of Mines was created in Freiberg (Saxony). It is a historical academy and we must gratefully acknowledge the authorities of the school, who were enthusiastic to house the symposium; in particular, the Director, Dr. J.L. Parra and Professor Dr. R. Castroviejo have helped with planning and organization. We also acknowledge the help of several institutions and people, starting with the Spanish Geological Society (Dr. M. Aurell), the Spanish Geological Survey-IGME (Dr. J. Civis), and its splendid Museum whose director (Dr. Isabel Rábano) has assisted us on many different issues with much skill. Dr. M. Santosh of IAGR has contributed with his sponsoring and advice. The Universidad Complutense has provided logistic help for the intra-conference field trips, and IGEO (UCM-CSIC Institute of Geosciences) has contributed financial support. At a personal level, Dr. A. Díez-Herrero from IGME has been an enthusiastic collaborator through the long process that started three years ago with the earlier idea that the city of Segovia could be the congress venue. Remarkably engineer Ignacio Gutierrez Perez also from Segovia was the website designer and the webmaster in charge of sending massive mailings to all those that we could reunite within a single mailing list built up from previous symposia lists. All those referred to at the start of this abstracts book have collaborated to different degrees and we acknowledge the effort. We are particularly indebted to Sonia Sánchez who was in charge of the registration and the treasury, and to the other two editors of the book, Bob Pankhurst and Pedro Castiñeiras. Carmen Galindo helped to set up the programme. Gondwana is a concept that is not so central a part of the northern hemisphere cultural heritage as it is for the southern one. Gondwana is truly alive in countries like Australia, South Africa or Southern South America. However the concept is becoming more significant for geologists in Europe, North America or Northern Asia. This symposium will be a modest contribution to enlarge this knowledge and a contribution to tie links between northern and southern cultures of Gondwana. vii Printed by the Instituto Geológico y Minero de España Madrid, July 2014 Abstract index Abati, J., Aghzer, A.M., Gerdes, A., Ennih, N. Precambrian isotopic sources of the Anti-Atlas (Morocco) .............................................................................................................................1 Albardeiro, L., Pereira, M.F., Gama, C., Chichorro, M., Hofmann, M., Linnemann, U. Tracing the geodymamic evolution of the North Gondwana margin using detrital-zircon geochro- nology of Pliocene–Pleistocene sand from SW Iberia .......................................................2 Albert, R., Arenas, R., Gerdes, A., Sánchez-Martínez, S., Fernández-Suárez, J., Fuenlabrada, J.M. Provenance of the Variscan Upper Allochthon (Cabo Ortegal complex, NW Iberian Massif) ..................................................................................................................................3 Almeida, J., Mohriak, W., Heilbron, M., Eirado, L.G., Valeriano, C., Tupinambá, M., Dios, F., Guedes, E. Magmatic activity in SE Brazil and SW Africa and the control on continent break-up ................................................................................................................................4 Alonso, J.L., Banchig, A.L., Voldman, G., Albanesi, G., Cardó, R., Fernández, L.P., Festa, A., Martín-Merino, G., Ortega, G., Rodríguez Fernández, L.R., Súarez, A., Ramos, V.A. Exten- sion and subsequent inversion tectonics in the Ratones section: the boundary between the Central and Western Argentine Precordillera .......................................................................5 Alonso, J.L., Gallastegui, J., García-Sansegundo, J., Rodríguez Fernández, L.R., Farias, P., Heredia, N., Cardó, R., Quintana, L., Ramos V.A. Fold reactivation in the Argentine Pre- cordillera ...............................................................................................................................6 Alvaro, J.J. The Cambrian anti-clockwise rotation of Gondwana and its palaeo-biogeographic implications ..........................................................................................................................7
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