Irene Pérez-Cáceres

• Doctor of Geology
• Postdoc Researcher at Cámara Oficial Mineira de Galicia

Geographic Information Systems (GIS) cover a wide range of Earth and environmental science disciplines that have become essential for spatial data management, easing the digital transformation needs of our society. Despite the usefulness of GIS, they remain underutilised in academia, and many students do not understand the possibilities that these...

The Courel Mountains UNESCO Global Geopark (2019) stands out in SW of Europe because of its geoheritage, its biodiversity and its cultural heritage, all of it considered of international interest. These aspects shape the local development economic and cultural improvement and development. The geoheritage is the result of three geological cycles sin...

En la zona de estudio afloran rocas de edad comprendida entre el Cambro-Ordovícico y el Devónico. El objetivo de este trabajo es establecer la secuencia de deformación para comprender su significado tectónico y su relación con el metamorfismo. En el Macizo de Lys-Caillaouas, después del desarrollo de las principales estructuras variscas (D1), se pr...

Intraplate ranges are topographic features that can occur far from plate boundaries, the expected position of orogens as described in the plate tectonics theory. To understand the lithospheric structure of intraplate ranges, we focused on the Spanish‐Portuguese Central System (SPCS), the most outstanding topographic feature in the central Iberian P...

The Imouzzer Emsian conglomerate of the North Moroccan Meseta contains pebbles of granites. The granites are peraluminous and highly potassic, with a calc-alkaline trace element pattern (high lithophile element enrichment and Nb and Ta negative anomalies). They are dated to late Miaolingian (ca 500 Ma) by U–Pb zircon. The magmatic zircons have inhe...

The southwestern Iberian Massif (Variscan Orogen) attests the accretion of three continental terranes in the Upper Paleozoic; these are, from north to south, the Central-Iberian Zone (CIZ), the Ossa-Morena Zone (OMZ), and the South-Portuguese Zone (SPZ), separated by orogenic sutures. The collision between these terranes had a marked left-lateral o...

The management of a UNESCO Global Geopark (UGGp) requires a vast wealth of miscellaneous scientific knowledge that can be successfully organised using a Geographical Information System (GIS). This paper presents a pragmatic GIS database to assist in the suitable governance of the Courel Mountains UGGp (2017) in Northwest Spain. The database is stru...

We combine structural analysis of fractures with 22 U–Pb dates measured in fracture-filling carbonate cements from bed-parallel fibrous calcite veins (beef), conjugated veins and faults within the Vaca Muerta Formation along the Andean fold and thrust belt in the Neuquén Basin. The measured ages constrain accurately the relationships between overpr...

The Pulo do Lobo domain is one of the units exposed within the orogenic suture zone between the Ossa-Morena and the South Portuguese zones in the SW Iberian Variscides. This metasedimentary unit has been classically interpreted as a Rheic subduction-related accretionary prism formed during pre-Carboniferous convergence and eventual collision betwee...

The Pulo do Lobo belt is one of the units related to the orogenic suture between the Ossa-Morena and the South Portuguese zones in the SW Iberian Variscides. This metasedimentary unit has been classically interpreted as a Rheic subduction-related accretionary prism formed during the pre-Carboniferous convergence and eventual collision between the S...

The Variscan deformation in the Iberian Massif is related to the large-scale plate tectonic scenario that drove to the destruction of the Rheic and other intervening oceans, to finally form the Pangea Supercontinent. The Northern Iberian Massif structure consists in an East-vergent orogenic wedge developed at the footwall of a rootless oceanic sutu...

The Variscan deformation in the Iberian Massif is related to the large-scale plate tectonic scenario that drove to the destruction of the Rheic and other intervening oceans, to finally form the Pangea Supercontinent. The Northern Iberian Massif structure consists in an East-vergent orogenic wedge developed at the footwall of a rootless oceanic sutu...

IGCP638 Leaders: Tahar AÏFA / Rennes 1 University (France) Omar SADDIQI / Hassan II Casablanca University (Morocco) Moussa DABO/ Cheikh Anta Diop University, Dakar (Senegal) http://igcp638.univ-rennes1.fr 2 nd Colloquium of the International Geoscience Program IGCP638 Casablanca 07 th-12 th November Abstract book 2 ORGANIZING COMMITTEE

The Pulo do Lobo belt (SW Iberian Variscides) is a low-grade metasedimentary unit considered as a subduction-related accretionary prism formed in relation to the suture contact between the Ossa-Morena and South Portuguese zones. The classical interpretation of this contact has been challenged with the dating of the metabasites of both Beja-Acebuche...

New SHRIMP U-Pb geochronogical data on detrital zircons from the South Portuguese Zone (SPZ) in SW Iberia and the Sehoul Block in northwest Morocco are provided, aimed at deciphering the presumed Avalonian affinity of these two regions. Despite the limitation imposed by the absence of Ordovician-Silurian rocks in outcrop, indirect support for an Av...

Detrital zircon age populations from five lithostratigraphic units of the South Portuguese Zone have been analyzed in order to determine provenance sources and to test the Avalonian or Gondwanan affinity of this terrane. Samples were collected in Devonian-Carboniferous rocks from the Pulo do Lobo belt (Horta da Torre, Ribeira de Limas and Santa Irí...

The Variscan orogeny in SW Iberia is characterized by a number of successive left-lateral transpressional structures that resulted from the oblique convergence between three continental terranes (Central Iberian, Ossa-Morena and South Portuguese zones) at Devonian to Carboniferous times. Their amalgamation gave way to both intense simple shearing a...

Different transpressional scenarios have been proposed to relate kinematics and complex deformation patterns. We apply the most suitable of them to the Variscan orogeny in SW Iberia, which is characterized by a number of successive left-lateral transpressional structures developed in the Devonian to Carboniferous period. These structures resulted f...

The Rheic Ocean suture resulted from pre-Carboniferous oceanic subduction followed by Late Devonian-Carboniferous Variscan collision. In SW Iberia, this suture has been classically located along the boundary between the Ossa-Morena and South Portuguese Zones based on the presence of three units: (i) a conspicuous metamafic unit (Beja-Acebuches) tha...

Different transpressional scenarios have been proposed to relate kinematics and complex deformation patterns. We apply the most suitable of them to the Variscan orogeny in SW Iberia, which is characterized by a number of successive left-lateral transpressional structures developed at Devonian to Carboniferous times. These structures resulted from t...

A vast Variscan nappe spreading from the Allochthonous Complexes of NW Iberia to the Ossa-Morena Zone in SW Iberia has been proposed by Díez Fernández and Arenas (2015), based on the correlation of different outcrops of high-pressure and MORB-type rocks. This interpretation conflicts with well-known geological and geophysical data regarding the SW...

The boundary between the Ossa-Morena Zone (OMZ) and the South Portuguese Zone (SPZ) in southwest Iberia is a Variscan collisional suture with transpressive left-lateral kinematics, contrasting with the dextral component that characterizes most of the Variscan convergence in other regions of the Orogen. Recent work including new structural and radio...

A geologic map and cross-section of the southwest sector of the Lys-Caillaouas Massif (Axial Zone of the central Pyrenees), have been constructed to study the structure and its relationship with the metamorphism. Cambro-Ordovician to Devonian metasedimentary rocks crop out deformed and metamorphosed during the Variscan Orogeny. Moreover, pre-Varisc...