Group Coordination
Graça Silveira and Ícaro F. Dias da Silva.
Keywords
Tectonic and earthquake hazards
Mantle & crustal dynamics;
Magmatic and volcanic hazards;
Mineral and hydrocarbon resources
Scientific Highlights
Earthquake hazards.The seismicity of low-strain regions (e.g., Iberia, Azores, Ghana, Norway) was studied with a new level of detail allowed by dense seismic and geodetic datasets, often taking advantage of ML tools. The new catalogs image the fine structure of seismically active regions, highlighting their complexity and identifying previously unmapped active faults. Earthquakes in the Azores and Norway were shown to respond to hydrological loads, demonstrating how external loads affect the time evolution of near-critical systems. IDL contributed to key developments towards open seismic data, products and services at national and European levels.
Selected Papers
Kheirdast N, Ansari A, Custódio S (2021) Neuro-Fuzzy Kinematic Finite-Fault Inversion: 2. Application to the Mw6.2, 24/August/2016, Amatrice Earthquake, Journal of Geophysical Research: Solid Earth, 126 (8), e2020JB020773. DOI: 10.1029/2020JB020773
Matos C, Custodio S, Batlo J, Zahradnik J, Arroucau P, Silveira G, Heimann S (2018) An Active Seismic Zone in Intraplate West Iberia Inferred from High-Resolution Geophysical Data, Journal of Geophysical Research – Solid Earth, 123 (4), 2885-2907. DOI: 10.1002/2017JB015114
Mohammadigheymasi, H., Tavakolizadeh, N., Matias, L. M., Mostafa Mousavi, S., Silveira, G., Custódio, S., Dias, N. A., Fernandes, R. M. S., Moradichaloshtorif, Y. (2023). Application of deep learning for seismicity analysis in Ghana. Geosystems and Geoenvironment, 2(2), 100152. https://doi.org/10.1016/j.geogeo.2022.100152
Shiddiqi, H., Ottemöller, L., Rondenay, S., Custódio, S., Gahalaut, V. K., Yadav, R. K., Halpaap, F., Gahalaut, K. (2023). Seismicity modulation due to hydrological loading in a stable continental region: A case study from the Jektvik swarm sequence in Northern Norway. Geophysical Journal International, 235(1), 231 – 246. https://doi.org/10.1093/gji/ggad210
Selected Projects
RESTLESS - IntegRatEd tools to decipher the genesis and Spatio-TemporaL Evolution of Seismic Sequences, Funded by FCT, PTDC/CTA-GEF/6674/2020, 2021 – 2024, Susana Custódio (PI)
SHAZAM - Seismicity and HAzards of the sub-saharian Atlantic Margin by FCT, PTDC/CTA-GEO/31475/2017, 2018-2022, Stéphanie Dumont (PI)
SPIDER – Seismogenic Processes In slowly DEforming Regions, FCT/PTDC, 2016-2019, Susana Custódio (PI)
Mantle dynamics. Research in Macaronesia (Cape Verde, Canary, Madeira, and the Azores Islands) focused on the intricate coupled dynamics of the crust and mantle, showing a diversity of mantle upwellings at different stages of evolution and offering insights into the origin of intraplate magmatism. Notably, our results indicate that the mantle plume beneath Madeira is possibly in a dying stage. Differently, we found evidence of a rejuvenated lithosphere beneath Cape Verde. Studies in Madeira and Canaries unveiled a complex anisotropic pattern beneath both hotspots showing a mantle flow perturbance, most likely from vertical movement confined to smaller upwellings within the two archipelagos.
Selected Papers
Carvalho J, Bonadio R, Silveira G, Lebedev S, Mata J, Arroucau P, Meier T, Celli NL (2019) Evidence for high temperature in the upper mantle beneath Cape Verde archipelago from Rayleigh-wave phase-velocity measurements, Tectonophysics, 770, 228225. DOI: 10.1016/j.tecto.2019.228225
Civiero C, Custódio S, Neres M, Schlaphorst D, Mata J, Silveira G (2021) The role of the seismically slow Central-East Atlantic Anomaly in the genesis of the Canary and Madeira volcanic provinces, Geophysical Research Letters, 48 (13), e2021GL092874. DOI: 10.1029/2021GL092874
Schlaphorst D, Silveira G, Mata J, Krueger F, Dahm T, Ferreira AMG (2022) Heterogeneous seismic anisotropy beneath Madeira and Canary archipelagos revealed by local and teleseismic shear wave splitting, Geophysical Journal International, 233 (1), 510-528. DOI: 10.1093/gji/ggac472
Selected Projects
FIRE – Fogo Island Volcano: multi-disciplinary Research on 2014 Eruption, Funded by FCT, PTDC PTDC/GEOGEO/ 1123/2014, 2016-2019, Rui Fernandes (PI)
SIGHT – SeIsmic and Geochemical Constraints on the Madeira HoTspot System, Funded by FCT, PTDC/CTA-GEF/30264/2017, 2018-2022, Graça Silveira (PI)
RESTLESS - IntegRatEd tools to decipher the genesis and Spatio-TemporaL Evolution of Seismic Sequences, Funded by FCT, PTDC/CTA-GEF/6674/2020, 2021 – 2024, Susana Custódio (PI)
GEMMA – improving GEodynamic Models in MAcaronesia by reconciling geodetic, geophysical and geological data, Funded by FCT, PTDC/CTA-GEO/2083/2021, 2022-2024, Rui Fernandes (PI)
Volcanism. The use of mercury (Hg) anomalies in marine sediments from the Atlantic and Tethys oceans as a tracer of volcanic activity of large igneous provinces (LIP) has provided new evidence that the massive eruptions of the Deccan Traps, in India, contributed to Cretaceous-Paleogene (66 Ma) mass extinction and the demise of the dinosaurs. Hg anomalies were also discovered marine sediments from Peniche, Central Portugal, and linked the volcanism of the Karoo-Ferrar magmatic province to the Early Toarcian Oceanic Anoxic Event.
Joint Singular Spectrum Analysis of different geophysical datasets revealed that magma movement follows frequencies imposed by lunisolar forces acting on the crust and Earth's surface, from the time scale of eruptions (days-weeks) to longer century time scales. These advances offer critical insights into the temporal evolution of eruptions and advances our capability of forecasting future volcanic eruptions and their evolution, with hazard implications.
Selected Papers
Dumont S, Le Mouël J-L, Courtillot V, Lopes F, Sigmundsson F, Coppola D, Eibl EPS, Bean CJ (2020) The dynamics of a long-lasting effusive eruption modulated by Earth tides, Earth and Planetary Science Letters, 536, 116145. DOI: 10.1016/j.epsl.2020.116145
Dumont S, Silveira G, Custódio S, Lopes F, Le Mouële J-L, Gouhier M, Guéhenneux Y (2021) Response of Fogo volcano (Cape Verde) to lunisolar gravitational forces during the 2014–2015 eruption, Physics of the Earth and Planetary Interiors, 312, 106659. DOI: 10.1016/j.pepi.2021.106659
Font E, Adatte T, Andrade M, Keller G, Mbabi Bitchong A, Carvallo C, Ferreira J, Diogo Z, Mirão J (2018) Deccan volcanism induced high-stress environment during the Cretaceous–Paleogene transition at Zumaia, Spain: Evidence from magnetic, mineralogical and biostratigraphic records, Earth and Planetary Science Letters, 484, 53-66. DOI: 10.1016/j.epsl.2017.11.055
Font E, Chen J, Regelous M, Regelous A, Adatte T (2021) Volcanic origin of the mercury anomalies at the Cretaceous-Paleogene transition of Bidart, France, Geology, 20. DOI: 10.1130/G49458.1
Ramalho RS, Quartau R, Hóskuldsson Á, Madeira J, da Cruz JV, Rodrigues A (2020) Evidence for late Pleistocene volcanism at Santa Maria Island, Azores?, Journal of Volcanology and Geothermal Research, 394, 106829. DOI: 10.1016/j.jvolgeores.2020.106829
Selected Projects
FIRE – Fogo Island Volcano: multi-disciplinary Research on 2014 Eruption, Funded by FCT, PTDC PTDC/GEOGEO/ 1123/2014, 2016-2019, Rui Fernandes (PI)
UNTIeD – UNlocking the MegaTsunamI Deadlock: Using the Near-source Impacts to Constrain Tsunami Generation by Volcanic Flank Collapses, FCT LISBOA-01-0145-FEDER-028588, 2018-2021, Ricardo Ramalho (PI)
Mineral resources. We developed holistic methods for exploring new critical mineral resources in various geological settings, from Oman to Iberia. By combining classic and cutting-edge field approaches and advanced laboratory techniques, we successfully defined geochemical, isotopic, and geochronological fingerprints to find unknown ore deposits. Studies on hydrocarbon reservoir analogues in the Jurassic carbonate platform formations in the Lusitanian Basin (Portugal) underscored the importance of carbonate units porosity and geometries in the distribution of reservoirs, which is crucial for the correct assessment of carbonate-based reservoirs.
Selected Papers
Luz F, Mateus A, Ferreira E, Tassinari CG, Figueiras J (2023) Pb-Nd-Sr Isotope Geochemistry of Metapelites from the Iberian Pyrite Belt and Its Relevance to Provenance Analysis and Mineral Exploration Surveys, Economic Geology, 117, 423-454 .DOI: 10.5382/ECONGEO.4869
Ferreira E, Mateus A, Azerêdo AC, Duarte LV, Mendonça-Filho J, Tassinari CG (2020) Tracing bottom-water redox conditions during deposition of Lower and Upper Jurassic organic-rich sedimentary rocks in the Lusitanian Basin (Portugal): Insights from inorganic geochemistry, Marine and Petroleum Geology, 117, 104343, DOI:10.1016/j.marpetgeo.2020.104343
Gonçalves MA, Mateus A (2019) Delimiting geochemical anomalies in the exploration of covered deposits with multifractal methods and using stream sediment data from the Iberian Pyrite Belt, Southwest Iberia, Ore Geology Reviews, 112, 103018, DOI: 10.1016/j.oregeorev.2019.103018
Jesus AP, Mateus A, Benoit M, Tassinari CG, Bento dos Santos T (2020) The timing of sulfide segregation in a Variscan synorogenic gabbroic layered intrusion (Beja, Portugal): Implications for Ni-Cu-PGE exploration in orogenic settings, Ore Geology Reviews, 126, 103767, DOI: 10.1016/j.oregeorev.2020.103767
Selected Projects
MOSTMEG - Predictive models for strategic metal rich, granite-related ore systems based on mineral and geochemical fingerprints and footprints, Funded by FCT and ERA-MIN, ERA-MIN/0002/2019, 2019-2024, António Mateus (PI)
SEMACRET - Sustainable Exploration for Orthomagmatic (critical) Raw Materials in the EU: Charting the Road of the Green Energy Transition, HORIZON-AG - HORIZON Action Grant Budget-Based, 101057741; Horizon-CL4-2021-Resilience-01-06. 2022-2025.Ana Jesus (PI)
Micropalaeontological studies (ostracods) led to new insights on palaecology of marine and non-marine settings, biostratigraphy and high-impact taxonomy, including definition of 8 new taxa for Science. Microceratina andreui Cabral & Lord, 2023.
Selected Paper
Danielopol, D. L.; Cabral, M. C.; Horne, D. J.; Namiotko, T.; Lord, A. R. (2023). Reconciling diagnostic traits in living and fossil taxa: The taxonomy and evolution of the genus Microceratina (Crustacea, Ostracoda, Cytheruridae). Zootaxa. 5244(4): 301-340
Mountain building and orogenic collapse. Geochemical and geochronological studies revealed the relationship between mountain building and collapse events, with a special focus on the Upper Palaeozoic Variscan Belt in the Iberian Massif. The study of the palaeogeography of marine basins formed by collisional orogens in the Iberian Massif showed its importance in constraining crust dynamics relative to far-field mechanisms such as slab rollback or orogenic delamination, forcing crustal thinning and orogenic collapse.
Selected Papers
Dias da Silva, Í, Pereira, MF, Gama, C, Steel-Hart, L, Barros Sánchez, S, Santos Alves, K, Gómez Barreiro, J, Tassinari, CG, Sato, K (2023) The influence of synorogenic extension on the crustal architecture of North Gondwana during the assembly of Pangea (Ossa-Morena Zone, SW Iberia), Geological Society Special Publication, 542, SP542-2023-2029, DOI: 10.1144/SP542-2023-9
Bento dos Santos T, Rodrigues JF, Castro P, Cotrim B, Pereira I, Ferreira JA, Meireles C, Ferreira N, Ferreira P, Ribeiro A, Guimarães F (2021) Exhumation of an anatectic complex by channel flow and extrusion tectonics: structural and metamorphic evidence from the Porto–Viseu Metamorphic Belt, Central-Iberian Zone, International Journal of Earth Sciences, 110, 2179-2201, DOI: 10.1007/s00531-021-02067-z
Dias da Silva Í, González Clavijo E, Díez-Montes A (2020) The collapse of the Variscan belt: a Variscan lateral extrusion thin-skinned structure in NW Iberia, IInternational Geology Review, 63, 659-695, DOI: 10.1080/00206814.2020.1719544
Ferreira JA, Mata J, Bento dos Santos T, Pereira I (2020) The role of melting on the geochemical evolution and isotopic variability of an anatectic complex in the Iberian Variscides, Lithos, 378-379, 105769, DOI:10.1016/j.lithos.2020.105769
Selected Projects
MOSTMEG - Predictive models for strategic metal rich, granite-related ore systems based on mineral and geochemical fingerprints and footprints, Funded by FCT and ERA-MIN, ERA-MIN/0002/2019, 2019-2024, PI: António Mateus
PYBE - Caracterização litosférica da Faixa Piritosa Ibérica com Magnetotelúrica. FCT, EXPL/CTA-GEF/0183/2021, 2021-2023. Francisco Moreno (PI)