Eloi González-Esvertit

Spanish National Research Council - GEO3BCN-CSIC

Gathering and arranging specific data related to different types of geological structures in thematic and interactive databases has become central for the geosciences. However, a well-defined workflow to achieve this goal is currently lacking. We present a Geographical Information System-based method for the systematic compilation, evaluation, and...

Folds are common structures that provide valuable insights into the direction and amount of shortening and the rheological properties of deformed rocks. Most thin plate folding theory started from M.A. Biot has historically been applied to isotropic materials, but rocks are often anisotropic due to the presence of tectonic foliations, bedding, vein...

The major elemental composition of chlorite is widely used for petrogenetic investigations on low-temperature geological processes. However, compositional variations of chlorite within a given tectonic environment are common and, when overlooked, can lead to erroneous petrological interpretations. We thoroughly investigate chlorites occurring withi...

Evaporite formations may represent suitable subsurface storage sites for carbon, nuclear waste, and Geo-energy applications, which are key for the Energy Transition. Consequently, the systematic indexation of the knowledge on evaporite structures is key for developing geoscience-based technologies to address the pressing societal challenges. Howeve...

Quartz veins with widths ranging from meters to hundreds of meters and lengths from tens of meters to kilometers, known as Giant Quartz Veins (GQVs), are ubiquitous in orogenic belts worldwide. These veins are very useful to gain understanding of fluid flow, quartz precipitation, and deformation mechanisms and also to unravel the geochemical histor...

Evaporites flow in the solid state under relatively low differential stress and have unique mechanical properties compared to other sedimentary rocks. Worldwide, they control the structural and stratigraphical architecture of many basins and orogens in ancient and active tectonic settings. Moreover, they host mineral deposits and play a key role in...

We present new data of the pre-Variscan, Variscan, and Alpine evolution of the pre-Silurian rocks from the Gréixer sector (La Cerdanya area, Eastern Pyrenees). Structural analysis and detailed mapping of Cambrian-Ordovician and Upper Ordovician low-grade metasediments suggest the existence of three deformational events, together with the emplacemen...

Hydrofractures, or hydraulic fractures, are fractures where a significantly elevated fluid pressure played a role in their formation. Natural hydrofractures are abundant in rocks and are often preserved as magmatic dykes or sills, and mineral-filled fractures or mineral veins. However, we focus on the formation and evolution of non-igneous hydrofra...

Quartz veins with widths ranging from meters to hundreds of meters and lengths from tens of meters to kilometers, known as Giant Quartz Veins (GQVs), are ubiquitous in orogenic belts worldwide. These structures are very useful to gain understanding of fluid flow, quartz precipitation, and deformation mechanisms, and also to unravel the geochemical...

Evaporites flow in the solid state under relatively low differential stress, and thus have unique mechanical properties compared to other rock types. Evaporite formations have been proposed as suitable subsurface storage sites for carbon, nuclear waste, and Geo-Energy applications, which are key for the Energy Transition. Additionally, they control...

Evaporites flow in the solid state under relatively low differential stress, and have unique mechanical properties compared to other sedimentary rocks. Worldwide, they control the structural and stratigraphical architecture of many basins and orogens in ancient and active tectonic settings. Moreover, they host mineral deposits and play key roles in...

Giant Quartz Veins (GQVs) are ubiquitous in different tectonic settings and, besides being often related to hydrothermal ore deposits, also represent large-scale fingerprints of the structural and geochemical history of the rocks in which they are hosted. Here we present detailed geological maps and interpretations of three key areas of the Eastern...

Quartz veins with widths ranging from meters to hundreds of meters and lengths from tens of metres to kilometres, known as Giant Quartz Veins (GQVs), Quartz Reefs or Quartz Lodes, are ubiquitous in different tectonic settings worldwide. These structures can act as conduits or barriers to heat and mass transfer within the Earth's crust, are often re...

Evaporites have unique physical and mechanical properties that make them very different from other sedimentary rocks. Their ability to flow in a viscous manner under relatively low stresses results in the formation of structures, such as diapirs and detachment levels, that control the evolution of many sedimentary basins and orogens. Flow of evapor...

Surface and sub-surface geological structures are common targets in both academic and industry research. For example, regional faults and shear zones are used to define the evolution of orogens and sedimentary basins worldwide, whereas quartz veins, unconformities and diagenetic geobodies are of special interest for the mining sector. As a result,...

Quartz veins are ubiquitous in various geological settings and their study can contribute to improve our understanding of the (micro-to macro-) structural and geochemical evolution of their host rocks. However, there are still many open questions about the formation mechanisms of large quartz veins. In the Eastern Pyrenees, veins of millimetric to...

Quartz veins are ubiquitous in orogenic settings, within zones of intense deformation such as faults and fractures in the upper (brittle) crust and shear zones in the lower (ductile) crust. The dimensions of quartz veins can vary dramatically within the same tectonic setting, from millimetric to hectometric thicknesses and from metric to kilometric...

Chlorite is a common mineral formed during low-medium temperature metamorphism, diagenesis and/or hydrothermalism. Its chemistry depends on the host rock composition and its physicochemical conditions of growth (e.g., T, P and fO2; e.g. Inoue et al., 2009). Thus, chlorite composition has been widely used as a geothermometer, first through empirical...

Quartz veins hosted in the infra and overlying series to the (Sardic) Upper Ordovician Unconformity provide new insights into the structural and thermal evolution of the pre-Variscan rocks of the Eastern Pyrenees. In the La Molina area (Canigó massif), two generations of metric quartz veins (V1 and V2) are distinguished by their distribution patter...

Veins formed under low fluid/rock ratios are a paleorecord of the P-T conditions within the enclosing rocks, and their study may shed light on the evolution of orogens. In the La Molina area (Canigó massif, Eastern Pyrenees), two generations of metric quartz veins (V1 and V2) are distinguished by their distribution patterns and their relationships...

The study at different scales of infra and overlying series to the Upper Ordovician unconformity and the quartz veins present in the vicinity of La Molina (Canigó Massif, Eastern Pyrenees) has provided new data on the pre-Variscan deformation. The structural characterisation was based on detailed geological mapping, cross-section elaboration and st...