A5067346640- Cryospheric studies and observations
- Geological and Geochemical Analysis
- Geological and Geophysical Studies Worldwide
- Arctic and Antarctic ice dynamics
- earthquake and tectonic studies
- Rock Mechanics and Modeling
- Climate change and permafrost
- Landslides and related hazards
- Geological formations and processes
- Winter Sports Injuries and Performance
- High-pressure geophysics and materials
- Geotechnical and Geomechanical Engineering
- Hydrocarbon exploration and reservoir analysis
- Seismic Imaging and Inversion Techniques
- Geology and Paleoclimatology Research
- Paleontology and Stratigraphy of Fossils
- Drilling and Well Engineering
- High-Velocity Impact and Material Behavior
- Geological and Tectonic Studies in Latin America
- Microstructure and mechanical properties
- Elasticity and Material Modeling
- Granular flow and fluidized beds
- Composite Material Mechanics
- Archaeological and Historical Studies
- Archaeological and Geological Studies
Universitat Autònoma de Barcelona
2015-2024
James Cook University
2018
Economic Research Centre
2018
Université Toulouse III - Paul Sabatier
2007-2009
Institut de Recherche pour le Développement
2009
Centre National de la Recherche Scientifique
2009
Université de Toulouse
2009
The flow of glaciers and polar ice sheets is controlled by the highly anisotropic rheology crystals that have hexagonal symmetry (ice lh). To improve our knowledge sheet dynamics, it necessary to understand how dynamic recrystallization (DRX) controls microstructures at different boundary conditions range from pure shear flattening top simple near base sheets. We present a series two-dimensional numerical simulations couple deformation with DRX various intensities, paying special attention...
ABSTRACT Results of numerical simulations co-axial deformation pure ice up to high-strain, combining full-field modelling with recrystallisation are presented. Grain size and lattice preferred orientation analysis comparisons between at different strain-rates show how has a major effect on the microstructure, developing larger equi-dimensional grains, but relatively minor development c -axes. Although -axis distributions do not vary much, appears have distinct relative activities slip...
Abstract. Synthetic polycrystalline ice was sheared at temperatures of −5, −20 and −30 ∘C, to different shear strains, up γ=2.6, equivalent a maximum stretch 2.94 (final line length is times the original length). Cryo-electron backscatter diffraction (EBSD) analysis shows that basal intracrystalline slip planes become preferentially oriented parallel plane in all experiments, with primary cluster crystal c axes (the axis perpendicular plane) plane. In except two highest-strain experiments...
Abstract. Disturbances on the centimetre scale in stratigraphy of North Greenland Eemian Ice Drilling (NEEM) ice core (North Greenland) can be mapped by an optical line scanner as long has visual layering, such as, for example, cloudy bands. Different focal depths allow, to a certain extent, three-dimensional view structures. In this study we present detailed analysis visible folds, discuss their characteristics and frequency, examples typical fold We also analyse structures with regard...
Research Article| March 01, 2011 Strain localization and porphyroclast rotation Albert Griera; Griera * 1Departament de Geologia, Universitat Autònoma Barcelona, E-08193 Bellaterra (Cerdanyola del Vallès), Spain *E-mail: albert.griera@uab.cat. Search for other works by this author on: GSW Google Scholar Paul D. Bons; Bons 2Institut für Geowissenschaften, Eberhard Karls Universität Tübingen, Wilhelmstrasse 56, 72074 Germany Mark W. Jessell; Jessell 3Université Toulouse, UPS (SVT-OMP) & IRD,...
There is ongoing debate on whether stylolites act as barriers, conduits, or play no role in fluid transport. This problem can be tackled by examining the spatial and temporal relationships between other diagenetic products at multiple scales. Using well-known Lower Cretaceous Benicàssim case study area (Maestrat Basin, E. Spain), we provide new field petrographic observations of how bedding-parallel influence different processes during basin evolution. The results reveal that serve baffles...
The processes of partial melting and subsequent melt transport are fundamental to Earth's differentiation, from the separation core mantle magma generation, evolution, segregation ascent within crustal domains. Active volcanoes have as their source partially molten areas upper crust. possibility a ascend depends on its connectivity, where percentage, dihedral angle between solid, well recrystallisation processes, play role (Llorens et al., 2016). deformation is primarily governed by...
The Balearic Promontory (BP) is a NE-SW oriented continental block located in the centre of Western Mediterranean that corresponds to northern prolongation Betic-Balearic front. BP represents unique case study, as it records two distinct compressive periods from Alpine orogeny, well exhibits evidences volcanism and back-arc extension related opening Mediterranean. Mallorca only island preserves an almost complete Cenozoic sedimentary record, which encompasses significant shift geodynamic...
Salt tectonics concepts may help explaining relatively complex tectonosedimentary relationships in the reinterpretation of inverted rifted margins. The objective this study is to develop a valid model from extension inversion for Jurassic-Cretaceous Tarascon basin northern Pyrenees, considering role salt observed stratigraphy and structure, which bring new light evolution Europe-Iberia plate boundary. To achieve this, revised detailed geological map, cross-sections, an evolutionary tectonic...
The Eaux-Chaudes massif (ECM) of the French Pyrenees consists a nappe stack located in western Axial Zone formed during Alpine times. It features basement-cored recumbent fold with large overturned limb Upper Cretaceous carbonates ductily deformed. Paleotemperatures ~350°C for an autochthonous succession and limb, ~310°C normal were recorded main deformational event, which is equivalent to burial depths 8-10 km. During deformation, syn- post-deformation calcite veins...
Abstract. We performed numerical simulations on the microdynamics of ice with air inclusions as a second phase. Our aim was to investigate rheological effects and explain onset dynamic recrystallization in permeable firn. The employ full-field theory crystal plasticity code coupled codes simulating processes predict time-resolved microstructure evolution terms lattice orientations, strain distribution, grain sizes grain-boundary network. Results show heterogeneous deformation throughout...
Partially dolomitized carbonate rocks of the Middle East and North America host large hydrocarbon reserves. The origin some these dolomites has been attributed to a hydrothermal mechanism. Benicàssim area (Maestrat Basin, eastern Spain) constitutes an excellent field analogue for fault-controlled stratabound dolomitization: dolostone geobodies are well exposed extend over several kilometres away from seismic-scale faults. This work investigates main controls on formation versus massive...
Research Article| May 01, 2013 When do folds unfold during progressive shear? Maria-Gema Llorens; Llorens 1Department of Geosciences, Eberhard Karls University Tübingen, Wilhelmstrasse 56, 72074 Germany Search for other works by this author on: GSW Google Scholar Paul D. Bons; Bons Albert Griera; Griera 2Departament de Geologia, Universitat Autònoma Barcelona, E-08193 Bellaterra (Cerdanyola del Vallès), Spain Enrique Gomez-Rivas Geology (2013) 41 (5): 563–566....