108 documents found, page 1 of 11
New Late Cretaceous and Central Atlantic Magmatic Province magmatic sources off...
Terrinha, Pedro; Neres, Marta; Noiva, João; Brito, Pedro; Rosa, Marcos; Batista, Luis; Ribeiro, CarlosThis work investigates the existence and tectonic control of magmatic bodies in the continental shelf of the SW Iberia margin. Magnetic data were densely acquired for a total area of ~4400 km2 and carefully processed. Our new maps reveal a complex magnetic anomaly field, where distinct zones are defined based on the anomaly distribution. A wide number and variety of magmatic bodies are interpreted, from >10 km-...
Post-rift tectono-sedimentary evolution of the deep West Iberian Margin.
Simões, Maria; Roque, Cristina; Ribeiro, Carlos; Noiva, João; Terrinha, PedroThe West Iberian Margin (WIM) is the conjugate margin of the Grand Banks of Canada and the rifting processes that originated both margins have been widely studied over the last decades. Therefore, WIM is well known as a classical example of a non-volcanic rifted margin with two main rifting phases related to the North Atlantic opening. Despite the studies carried out so far, the knowledge about the sedimentary ...
Marcadores tectónicos, ambientais e cronológicos em rochas sedimentares do Pale...
Terrinha, Pedro; Duarte, João; Ribeiro, Carlos; Pereira, Helder; Correia, Gina; Sousa, MonicaNa Bacia Algarvia, sector ocidental de Sagres-Lagos encontra-se o registo tectonoestratigráfico de rifting, do Triásico (~220 Ma) ao Cretácico inferior terminal (Albiano, ~100Ma). As séries estratigráficas deste sector da Bacia Algarvia são condensadas, registando numa espessura inferior a 0.5 km o registo sedimentar Mesozóico local de 120 milhões de anos. Por oposição na Bacia offshore no Algarve Central o reg...
Tectónica orogénica e de rifting, e impactos de tsunami no Barlavento Algarvio ...
Terrinha, Pedro; Duarte, João; Ribeiro, Carlos; Pereira, Helder; Costa, Pedro; Correia, Gina; Sousa, MonicaNa Bacia Algarvia, sector ocidental de Sagres-Lagos encontra-se o registo tectonoestratigráfico de rifting, do Triásico (~220 Ma) ao Cretácico inferior terminal (Albiano, ~100Ma). As séries estratigráficas deste sector da Bacia Algarvia são condensadas, registando numa espessura inferior a 0.5 km o registo sedimentar Mesozóico local de 120 milhões de anos. Por oposição na Bacia offshore no Algarve Central o reg...
Relatório da Campanha de Mar “SAT_UHRS_2022”
Brito, Pedro; Noiva, João; Rosa, Marcos; Batista, Luís; Terrinha, PedroThis report describes the activities of the SAT_UHRS_2022 sea campaign carried out from May 10 to 15, 2022, aboard the RV Diplodus, operating from the port of Sesimbra. The main objective of this campaign was to carry out sea acceptance tests (SAT) for new components that were recently integrated into the ultra-high resolution seismic (UHRS) reflection data acquisition system of the Marine Geophysics Laboratory...
High-Resolution Marine Magnetic Mapping of the Portuguese Nearshore: Unraveling...
Neres, Marta; Terrinha, Pedro; Brito, Pedro; Rosa, Marcos; Noiva, João; Magalhães, Vítor; Silva, Mariana; Batista, Luis; Teixeira, ManuelThe SW Portuguese margin has been intensively studied, particularly for rifting, tectonic inversion and tectonic reactivation of the Atlantic passive margin. In this work we bring new data on the continental shelf, usually not acquired by the heavier geophysical methods (e.g. airborne or low resolution deep seismic-magnetic surveys). These new data allow casting a clear light bridging between the geological str...
Multiproxy characterization of high energy layers in the nner continental shelf...
Santos, Jacqueline; Drago, Teresa; Moura, Delminda; Magalhães, Vitor; Roque, Cristina; Silva, Pedro F.; Rodrigues, Ana Isabel; Terrinha, PedroThe occurrence of sedimentary layers indicating high energy events is common in the continental shelves sedimentary record. Their presence has been usually related either to tsunami waves or storm waves. In both cases, the identification of the transport mechanism requires a variety of proxies. This work presents the preliminary results of the analysis of a gravity core (MW-107) collected at ca. 57 m water dept...
Multi-scale and multi-disciplinary investigation of the southwest Portuguese Co...
Terrinha, Pedro; Ribeiro, Carlos; Noiva, João; Rosa, Marcos; Brito, Pedro; Magalhães, Vítor; Neres, Marta; Nogueira, Pedro; Velez, SandraThe MINEPLAT project (Assessment of the mineral resources potential in the continental shelf of Alentejo and of the environmental conditions caused by the tectonic uplift in the PlioceneQuaternary) allowed acquisition of 1700 km of ultra- high resolution seismic profiles, and full coverage of multibeam bathymetry and acoustic backscatter of 1450 km2 and 1940km of magnetic data of the Alentejo continental shelf,...
Nature and origin of gas trapped in sediments in the Tagus River ebb-delta, off...
Ribeiro, Carlos; Terrinha, Pedro; Rosa, Marcos; Neres, Marta; Noiva, João; Brito, Pedro; Magalhães, VítorThe Tagus River ebb-delta is located near an important city center off Lisbon, Portugal. The Tagus delta hosts various kilometer scale landslides, the most important of which has been mapped and described with a presumable age of ~11 ky and 10 km in length, 4 km wide and 20 m of maximum thickness. An equivalent area of gas trapped in the sediments has also been reported (Terrinha et al., 2019). The TAGUSGAS pro...
Integrated thematic geological mapping of the Atlantic Margin of Iberia.
Terrinha, Pedro; Medialdea, Teresa; Batista, Luís; Somoza, Luis; Magalhães, Vítor; González, Francisco Javier; Noiva, João; Lobato, Ana; Rosa, MarcosThis paper synthesizes the geology of the Atlantic Margin off the coast of Iberia and surrounding Abyssal Plains using published thematic mapping freely downloadable from EMODNET-Geology portal at different scales. Selected information was chosen in order to highlight mineral occurrences and natural hazards overlaid on geological and morphological maps. Altogether, this information is published and interpreted ...