10 documents found, page 1 of 1
Mineralogy and Geochemistry of High-Temperature Cu-rich Hydrothermal Chimneys f...
González, Javier; Somoza, Luis; Medialdea, Teresa; Santofimia, Ester; Rincón-Tomás, Bianca; Marques, Filipa; Pinto Ribeiro, Luísa; Calado, AntónioThe Moytirra hydrothermal vent field is located on the Mid-Atlantic Ridge (MAR) at approximately 45°N, between the Azores and Iceland. This system was discovered in 2011 during an Irish-led scientific expedition aboard the RV Celtic Explorer, and was later extensively explored and sampled in 2019 by the Spanish EXPLOSEA 2 expedition aboard the RV Sarmiento de Gamboa, with the support of the remotely operated ve...
Chemical composition of submarine massive sulphides in the Lucky Strike hydroth...
Ferreira, Pedro Tavares; Inverno, Carlos; Silva, Teresa; Schiellerup, Henrik; González, JavierSUMÁRIO: No segmento Lucky Strike, localizado na Crista Média da região dos Açores, existe um dos maiores campos submarinos hidrotermais activos do nosso planeta. Para além da existência de dezenas de chaminés hidrotermais expelindo fluidos a elevadas temperaturas (~325 ºC), uma área significativa com cerca de 1 km2 é constituída por um substrato rochoso formado por placas hidrotermais e sulfuretos maciços poli...
Chemical composition of submarine massive sulphides in the Lucky Strike hydroth...
Ferreira, Pedro Tavares; Inverno, Carlos; Silva, Teresa; Schiellerup, Henrik; González, JavierSUMÁRIO: No segmento Lucky Strike, localizado na Crista Média da região dos Açores, existe um dos maiores campos submarinos hidrotermais activos do nosso planeta. Para além da existência de dezenas de chaminés hidrotermais expelindo fluidos a elevadas temperaturas (~325 ºC), uma área significativa com cerca de 1 km2 é constituída por um substrato rochoso formado por placas hidrotermais e sulfuretos maciços poli...
Multidisciplinary Scientific Cruise to the Northern Mid-Atlantic Ridge and Azor...
Somoza, Luis; Medialdea, Teresa; González, Javier; Calado, António; Afonso, Andreia; Albuquerque, Mónica; Bettencourt, Renato; Blasco, IkerThis work presents the preliminary result of the multidisciplinary cruise EXPLOSEA2 surveying the northern Mid-Atlantic Ridge and Azores Archipelago from 46 300 N to 38 300 N aboard the R/V Sarmiento de Gamboa and ROV Luso over 54 days (June 11 to July 27, 2019). In this cruise report, we detail the geophysical, hydrographic, geological, oceanographic, ecological, and microbiological data acquired and a brief o...
High-resolution multibeam bathymetry of the northern Mid-Atlantic Ridge at 45–4...
Somoza, Luis; Medialdea, Teresa; González, Javier; Marchancoses, Sara; Candón, Jose; Cid, Constantino; Calado, António; Afonso, AndreiaThis work presents a new high-resolution multibeam bathymetric map of a segment of active deep sea-floor spreading in the Atlantic Ocean, the northern Mid-Atlantic Ridge (MAR) at 45–46º N. New high-resolution bathymetry data were acquired using an Atlas multibeam echosounder onboard the research vessel Sarmiento de Gamboa during the EXPLOSEA-2 survey in 2019. The final map of the MAR (50 m cell grid size) at th...
Low-temperature, shallow-water hydrothermal vent mineralization following the r...
González, Javier; Rincón-Tomás, Blanca; Somoza, Luis; Santofimia, Esther; Medialdea, Teresa; Madureira, Pedro; López-Pamo, Enrique; Hein, JamesHydrothermal iron (Fe)-rich sediments were recovered from the Tagoro underwater volcano (Central Atlantic) that formed during the 2011–2012 volcanic event. Cruises in 2012 and 2014 enabled the monitoring and sampling of the early-stage establishment of a hydrothermal system. Degassing vents produced acoustic flares imaged on echo-sounders in June 2012, four months after the eruption. A novel hydrothermal vent s...
GeoERA Raw Materials Monograph : the past and the future
Wittenberg, Antje; de Oliveira, Daniel Pipa Soares; Flindt Jørgensen, Lisbeth; González, Javier; Heldal, Tom; Aasly, Kari Aslaksen; Deady, EimearABSTRACT: GeoERA Minerals projects have produced data aimed at supporting Europe’s minerals sector and to assist the European Commission to realise its goals for raw materials. Data has been compiled on mineral occurrences and mineral provinces across Europe, in particular, areas with potential to host Critical Raw Materials. Anecdotal evidence from the minerals sector provides an indication of the likelihood o...
GeoERA´s contribution towards resilience in Europe’s raw materials supply chains
Wittenberg, Antje; De Oliveira, Daniel Pipa Soares; González, Javier; Flindt Jørgensen, Lisbeth; Held, TomThe well-being of society and the interdependencies of national economies depend heavily on reliably functioning supply chains as the COVID-19 pandemic proved this long-known statement in everyone's daily life. None of the supply chains can do without the mostly mineral raw materials. The United Nations sees raw materials as the key component for achieving all 17 Sustainable Development Goals (SDGs).
GeoERA raw materials to support Europe’s resilience on raw materials
Wittenberg, Antje; De Oliveira, Daniel Pipa Soares; Flindt Jørgensen, Lisbeth; González, Javier; Heldal, TomEurope’s vision to be a climate neutral economy by 2050 has ushered in the energy transition. Carbon-neutral energy supply is based on raw materials from which energy-critical elements for rechargeable batteries like cobalt, graphite, lithium and rare earth elements can be purified. In addition to direct energy generation, other future-oriented, environmentally friendly key technologies needed for digitisation ...
Cinética de degradação ruminal do bagaço de cevada submetido a diferentes tempe...
Pereira, José Carlos; González, Javier; Oliveira, Ronaldo Lopes; Queiroz, Augusto César deO objetivo deste experimento foi avaliar os efeitos de diferentes temperaturas de secagem do bagaço de cevada sobre a composição química e a degradabilidade ruminal da matéria seca e da proteína bruta. As amostras do bagaço de cevada foram secas em estufa a temperatura médias de 50,2 (BC50), 100,5 (BC100), 134,1 (BC135) e 173,7ºC (BC174), e um tratamento controle, cuja amostra foi seca a frio, pelo processo de...