Carbon isotope record (d13Ccarbonate) of the Middle to Late Jurassic (Callovian - Oxfordian) from the Algarve Basin, Portugal

The Algarve Basin is an important Mesozoic depocentre located in southern Portugal which formed during the succesive phases of the North Atlantic rifting following the break-up of Pangea [1]. Several unconformities related to compressive episodes are observed in the stratigraphic record of the Algarve Basin. One of these episodes ocurred in the transition from Middle to Upper Jurassic times and is marked by an important tectonic episode, observed throughout Iberia [1], that caused the tilting and folding of the Middle Jurassic strata. This situation can be observed at Benaçoitão, where Oxfordian limestones rest unconformably over tilted Middle Callovian marly limestones. In this work we present !13Ccarbonate data across the Middle and Upper Jurassic rocks from the Algarve Basin at Benaçoitão

Preliminary account of the Silurian carbon isotope record (d13Corg) from the Barrancos region, Ossa Morena Zone, Portugal

The Barrancos region provides one of the reference sections for the Silurian of the Ossa Morena Zone in Portugal. In this area the Silurian succession is condensed, with a maximum thickness of 50 m and the ages provided by graptolite faunas indicates that all the Silurian system is represented here. The lithologies are fairly homogenous throughout the succession consisting of black carbonaceous shales interbedded with black cherts, that were deposited in marine basins that developed at the northen margins of the Gondwana continent. This study is the first attempt to characterize the variation of 13Corg in this region, in order to assess well-documented Silurian climatic events. The studied section is located at Monte do Carreba, near Barrancos village, and consists of a 45 m thick succession of black shales and cherts with graptolite faunas that indicates a Llandovery to lower Ludlow age. The base of the section is faulted against Upper Ordovician greywackes and quartzites. In this section 13Corg shows a baseline of consistent low values ranging from -25.88 to -25.10%. This is interrupted by three positive excursions with maximum values of: -22.73% at the transition between the Llandovery (Telychian) and Wenlock (Sheinwoodian), -23.33% at the Homerian and -23.09% at the transition between the Wenlock and Ludlow (Gorstian). The excursions have positive shifts between +2.55 and +3.15% and are tentatively related to the three first global climatic events recognized for the Silurian (Ireviken, Mulde and Linde). Although this study is a preliminary account of 13Corg in this region, it could provide usefull data for the recognition and discussion of climatic global events in high latitude regions as was the OMZ located during Silurian times and for sections with high level of thermal maturation.Fundação para a Ciência e Tecnologia (FCT) (PhD grant SFRH/BD/48534/2008)

Integrated thermochronology and organic maturation studies in the South Portuguese Zone and Algarve Basin (South Portugal)

This PhD research project started in February this year. Its main goal is to combine apatite fission track analysis (AFTA) with other low-temperature thermochronometers (zircon fission track, (U-Th)/He apatite) to construct temperature-time paths for the South Portuguese Zone and the Algarve Basin

Variação isotópicas d13C carbonatos na Sucessão da Baía de Três Angras: afloramento Mesozóico da Carrapateira (Kimeridgiano Inferior)

O afloramento Mesozóico da Carrapateira (AMC), localizado a 20 km a norte de Sagres é formado por sedimentos do Triássico Superior ao Kimmeridgiano. Para compilar os valores δ 13C para esta secção, sessenta e cinco amostras de carbonatos foram estudadas. Os valores δ 13C variam gradualmente ao longo da sucessão mostrando uma linha de base com uma tendência geral negativa. No entanto, a curva de δ 13C indica duas principais excursões negativas δ 13C, a primeira relacionada com a presença de um nível conglomerático, com um valor mínimo de -1,38 ‰ e uma segunda excursão com um valor mínimo de -3,10 ‰, imediatamente abaixo das camadas de calcário bioclástico do topo da sucessão. Em geral, a tendência negativa inicial está de acordo com a curva de δ 13C global, para o Kimeridgiano no Domínio Tetsiano, onde o AMC se insere. As duas excursões negativas são tendencialmente relacionadas com as perturbações no ciclo regional de carbono. Assim, ambos são interpretados como um resultado da entrada de grande quantidade de 12C para a bacia, como resultado de impulsos regressivos como sugerido pela análise sedimentológica, TOC e de palinofácies

Geochemistry of the Baixo Alentejo Flysch Group, South Portuguese Zone: implications for provenance and palaeoweathering

The Baixo Alentejo Flysch Group (BAFG) is one of the domains of the South Portuguese Zone, consisting of deepwater tubiditic sediments, with more than 5 km in thickness. Stratigraphically the BAFG is subdivided into three formations, from the bottom to the top: Mértola Formation, Mira Formation and Brejeira Formation, with ages ranging from Middle to Upper Carboniferous

Caracterização geoquímica do Grupo do Flysch do Baixo Alentejo (Zona Sul Portuguesa): resultados preliminares

O Grupo do Flysch do Baixo Alentejo (GFBA) é um dos domínios da Zona Sul Portuguesa (ZSP), sendo constituído por sedimentos turbidíticos profundos, com uma espessura superior a 5 km (Oliveira, 1990)

Using mobile devices and apps to assist the elder population in rural areas and generate business opportunities

Providing gerontological cares represents an increased challenge when applied to rural scenarios. This paper discusses the role of technology in gerontology and specifically how technology-based solutions can be developed to assist the elderly population in rural areas. We also characterize the Northeast Portuguese region exposing its rural characteristics and presented some demographic numbers. Finally, a conceptual model and a prototype supported by mobile devices are presented to assist and monitor the elderly and enhance business opportunities. The developed prototype allows not only to assist the elderly in a set of typical elderly population routines - such as those related to health - but also to improve the interaction between the elderly and their relatives and / or caregivers. This work is part of a more extensive effort that has been made in the search for effective solutions to assist the elderly population in rural areas, typically distant from the main health and / or support services; contributing to relieve these deficits.info:eu-repo/semantics/publishedVersio

Book of Abstracts 15th International Symposium on Computer Methods in Biomechanics and Biomedical Engineering and 3rd Conference on Imaging and Visualization

In this edition, the two events will run together as a single conference, highlighting the strong connection with the Taylor & Francis journals: Computer Methods in Biomechanics and Biomedical Engineering (John Middleton and Christopher Jacobs, Eds.) and Computer Methods in Biomechanics and Biomedical Engineering: Imaging and Visualization (JoãoManuel R.S. Tavares, Ed.). The conference has become a major international meeting on computational biomechanics, imaging andvisualization. In this edition, the main program includes 212 presentations. In addition, sixteen renowned researchers will give plenary keynotes, addressing current challenges in computational biomechanics and biomedical imaging. In Lisbon, for the first time, a session dedicated to award the winner of the Best Paper in CMBBE Journal will take place. We believe that CMBBE2018 will have a strong impact on the development of computational biomechanics and biomedical imaging and visualization, identifying emerging areas of research and promoting the collaboration and networking between participants. This impact is evidenced through the well-known research groups, commercial companies and scientific organizations, who continue to support and sponsor the CMBBE meeting series. In fact, the conference is enriched with five workshops on specific scientific topics and commercial software.info:eu-repo/semantics/draf

The thermal history and hydrocarbon source rock potential of the mid Carboniferous Quebradas Formation in SW Portugal and its correlatives in western Atlantic offshore basins

The mid Carboniferous Quebradas Formation of the ‘South Portuguese Zone’ (SPZ) comprises 80m of post-mature black mudrocks with a mean TOC of 2.5%. Lithostratigraphic units of similar facies and age such as the Holywell Shale, the Edale Shale and the Bowland Shale are important HC source rocks in the UK, having sourced a considerable proportion of the hydrocarbons in the East Irish Sea, East Midlands and Formby oilfields respectively. The kerogen content of the Quebradas Formation is mixed but slightly more oil-prone in its lower part. At outcrop, it is strongly post-mature with vitrinite reflectance (Rr) ca. 4%. Illite crystallinity results from the Quebradas Formation and associated units suggest lower maturity than vitrinite reflectance. Analysis of the optic fabric of very thin coal lenses within the Brejeira Formation which overlies the Quebradas Formation suggests that peak temperatures were attained before the Variscan (late Carboniferous – early Permian) deformation. Triassic rocks unconformably overlying the Carboniferous sequence are much less mature, with Rr ca. 1.2%. Although the the Quebradas Fm has no HC source potential onshore due to its high maturity, Carboniferous rocks offshore may not have experienced the same extreme thermal history as the SPZ