5 documents found, page 1 of 1
Hydrate occurrence in Europe: a review of available evidence
Minshull, Timothy A.; Marín-Moreno, Hector; Betlem, Peter; Bialas, Joerg; Bünz, Stefan; Burwicz, Ewa; Cameselle, Alejandra L.; Cifci, GunayLarge national programs in the United States and several Asian countries have defined and characterised their marine methane hydrate occurrences in some detail, but European hydrate occurrence has received less attention. The European Union-funded project “Marine gas hydrate – an indigenous resource of natural gas for Europe” (MIGRATE) aimed to determine the European potential inventory of exploitable gas hydra...
Influence of dominant wind patterns in a distal region of the NW Iberian Margin...
Martins, Virgínia; Rey, Daniel; Pereira, Egberto; Plaza-Morlote, Maider; Salgueiro, Emília; Moreno, João; Duleba, Wânia; Ribeiro, Sara MonteiroThis work combines planktonic foraminiferal assemblages, stable isotope, transfer function estimated sea surface paleotemperatures (SST) and export productivity (Pexp) with sedimentological records from the PC7 core to document paleoclimatic and paleoceanographic changes on a distal region of the NW Iberian Margin since the last glaciation (<≈68 ka). Neodymium and strontium isotope data are also used to identif...
Longshore Transport Estimation on Ofir Beach in Northwest Portugal: Sand-Tracer...
Fernández-Fernández, Sandra; Baptista, Paulo; Martins, Virgínia A.; Silva, Paulo A.; Abreu, Tiago; Pais-Barbosa, Joaquim; Bernardes, CristinaThis work aims to shed some light on longshore sediment transport (LST) in the highly energetic northwest coast of Portugal. Data achieved through a sand-tracer experiment are compared with data obtained from the original and the new re-evaluated longshore sediment transport formulas (USACE Waterways Experiment Station’s Coastal Engineering and Research Center, Kamphuis, and Bayram bulk formulas) to assess thei...
The ITRAX core scanner, a useful tool to distinguish anthropic vs. climatic inf...
Martins, Virgínia A.; Dias, João A.; Bernardes, Cristina; Rubio, Belén; Bernabeu, Ana; Rey, Daniel; Soares, António M.; Sobrinho, FredericoThe main goal of this work is to distinguish anthropic and climatic influences in sediments from the lagoon of Aveiro (Portugal). This study is based on a core (240-cm long) collected in Murtosa Channel. Optical and X-radiographic images and high-resolution elemental profiles were acquired with ITRAX micro-X-ray fluorescence (XRF) core scanner. Samples collected at each ≈3 cm along the core were analysed for gr...
Assessment of the health quality of Ria de Aveiro (Portugal): heavy metals and ...
Martins, Virgínia A.; Frontalini, Fabrizio; Tramonte, Keila M.; Figueira, Rubens C. L.; Miranda, Paulo; Sequeira, Cristina; Fernández-Fernández, SandraThis work analyses the distribution of heavy metals in the sediments of Ria de Aveiro (Portugal) assessed by total digestion and sequential chemical extraction of the sediments. The influence of environmental parameters on the living benthic foraminiferal assemblages was studied. The most polluted parts in the Ria de Aveiro are areas where the residence time is high and cohesive sediments are deposited. Organic...