Estudi petrològic i geoquímic del vulcanisme recent de la Garrotxa

Màster en GeologiaLa zona volcànica de la Garrotxa forma, juntament amb les zones volcàniques de la Selva i l'Empordà, la província volcànica alcalina d'intraplaca del NE de Catalunya. En el cas de la zona olotina, tot i ser coneguda des de fa més de dos segles, el coneixement que se'n té és encara deficient, especialment en els camps de la geoquímica i la petrologia. El present estudi aporta gran quantitat de dades de geoquímica de roca total, petrologia i química mineral de 37 noves mostres, principalment làviques, pertanyents en gran part a la zona menys estudiada anteriorment. S'han revisat les dades geoquímiques publicades i s'han descartat les que no eren de bona qualitat i/o no se'n podia conèixer l'origen. S'han uniformitzat les proporcions Fe2O3/FeO segons Middlemost (1989), i la nomenclatura de les mostres seguint el criteri de la IUGS, fet que ha servit per evidenciar que la terminologia emprada en els mapes de l'ICC és sovint incorrecta. Per a l'anàlisi de les dades, aquestes han estat agrupades per: zona i unitat d'origen de les mostres, i edats (relatives i absolutes). L'anàlisi conjunta de totes les dades geoquímiques, petrològiques i de química mineral, ha revelat heterogeneïtat en els materials del vulcanisme quaternari, procedents de fusió parcial amb un grau molt baix d'una font mantèl·lica, així com l'existència de processos de diferenciació per cristal·lització fraccionada en cambra magmàtica de manera generalitzada a tota la regió. Aquestes cambres tindrien una part superior més diferenciada, com evidencia el fet que en algunes zones els primers materials emesos són els més diferenciats

Use of whole rock geochemistry for ignimbritic unit recognition: an example from the Sulcis area (SW Sardinia, Italy)

In the Sulcis area (SW Sardinia, Italy) a thick OligoMiocene volcanic sequence formed during the drifting and rotation of Sardinia from the European continental margin to its current position. These volcanics originated by the combined effect of oceanic crust subduction under the Corsica-Sardinia microplate and increased extensional tectonics after 18 M

Papel del CA125 en la predicción de reingreso hospitalario y mortalidad en los diferentes subgrupos de pacientes con insuficiencia cardiaca de predominio derecho

La insuficiencia cardiaca es un motivo frecuente de ingreso hospitalario con una importante morbimortalidad para el paciente. Se han investigado numerosos biomarcadores con finalidad diagnóstica y pronóstica, siendo el más reciente el CA125. Este biomarcador ha sido estudiado en pacientes con IC con FEVI reducida y FEVI preservada, pero no ha sido evaluado en pacientes con IC con predominio de fallo derecho. Material y métodos: Se realizará el análisis de una cohorte retrospectiva de pacientes que ingresaron en nuestro centro consecutivamente por descompensación de IC por disfunción de ventrículo derecho, a partir de enero de 2018 hasta enero de 2022. Los pacientes se dividirán en subgrupos dependiendo del tipo de fallo del ventrículo derecho. Se recogerán variables demográficas, clínicas, tratamiento farmacológico previo, niveles de CA125, NT-proBNP, parámetros electrocardiográficos y ecocardiográficos y finalmente se realizará seguimiento durante 1 año para observar los reingresos y la mortalidad. Los datos se analizarán con el software SPSS Statistics 23. Plan de trabajo y marco estratégico: El proyecto se desarrollorá entre septiembre de 2022 y junio de 2023. En primer lugar, tras realizar una revisión bibliográfica y establecer los objetivos finales del proyecto, será presentado al CEIC de nuestro centro. Consideramos que este trabajo puede ser de gran utilidad para planificar el manejo clínico tras el alta de los pacientes que ingresan por insuficiencia con disfunción de ventrículo derecho, ayudando a la elaboración futura de vías clínicas con la finalidad de reducir los reingresos y la mortalidad de estos pacientes

Subduction-related fluids influence on the Oligo-Miocene transitional magmatism of the Sulcis area (SW Sardinia, Italy)

The Sardinia-Corsica microplate was involved in OligoMiocene times in a SE-ward drift and counterclockwise rotation from the European margin in western Mediterranean to its current position. This movement was caused by the roll-back play of a NWward subducting oceanic plate under this margin and produced the detachment of this microplate from the continental margin and the openning of the Liguro-Provençal basin. As a result of the subduction abundant calc-alkaline magmatism of orogenic affinity occurred, mostly in the western sectors of Sardinia. In the final stages of the Miocene subduction and magmatism, coinciding with an increase in extensional tectonics, in the Sulcis area magmatism shifted from typical orogenic andesites to more evolved products of transitional character, ranging from trachydacites to rhyolites, with the relevant presence of peralkaline magmas (comendites), which were emplaced mostly as widespread ignimbrites reaching up to 20 km3 in volume and forming a pile over 200 m thick

Vectors to ore in replacive VMS deposits of the northern Iberian Pyrite Belt: the case study of Aguas Teñidas deposit

Volcanogenic Massive Sulphide (VMS) deposits represent a major source of base, precious and other metals of economic and industrial importance. The Iberian Pyrite Belt (IPB) is an outstanding VMS district located in the SW Iberian Peninsula. It is arguably the largest known accumulation of sulphides on the Earth's crust, and represents the main mining area in Spain and one of the main zones of base metal production in Europe. As in other mining areas, progressive exhaustion of the most shallow and easily accessible deposits is leading to increasingly complex exploration. In this context, the combined study of the mineral systems and the development of new exploration strategies and technologies based on geophysical methods and vectors to ore play a vital role

Cannibalization of previous Na-rich clinopyroxenes by ascending basic magmas of the Garrotxa Volcanic Field (NE Spain)

The Garrotxa Volcanic Field (GVF) is a Quaternary monogenetic volcanic field belonging to the NE Spain volcanic province, recording a Neogene alkaline intraplate magmatic activity consequence of the rift-type extensional tectonics that has affected the eastern margin of Iberia since late Oligocene

Geoquímica de roca total como herramienta para la caracterización e identificación de unidades ignimbríticas: el vulcanismo Oligo-Mioceno del Sulcis (SO de Cerdeña, Italia)

En el Sulcis (SO de Cerdeña, Italia) hay una potente secuencia volcánica Oligo-Miocénica formada durante la traslación y rotación de Cerdeña desde el margen continental europeo hasta su posición actual, originada por la acción combinada de la subducción de corteza oceánica bajo la microplaca sardo-corsa junto con una creciente tectónica extensional a partir de los 18 Ma. Estos depósitos superan los 600 metros de potencia y cubren un área de 40 km de diámetro entre tierra firme y dos islas menores. Esta secuencia consiste en una mitad inferior formada por domos y coladas andesíticos, y una superior de apilamiento de mantos ignimbríticos traquiriolíticos y riolíticos hasta comendíticos, algunos de los cuales cubren toda el área. Las similitudes entre unidades ignimbríticas, tanto macroscópicas como microscópicas, así como la variación de facies dentro de una misma unidad, dificulta la correcta identificación y correlación entre zonas y afloramientos en un área tan extensa, dividida además por el mar. Por ello se ha realizado una caracterización geoquímica de las distintas unidades en base a análisis de elementos mayores y trazas en roca total y se ha desarrollado un protocolo en base a la geoquímica de elementos traza inmóviles para poder resolver dudas de identificación

Space-Division Multiplexing fibers for radiofrequency signal processing

[EN] Beyond high-capacity transmission, space-division multiplexing fibers can be engineered to provide distributed signal processing for microwave signals. We present an overview of different fiber technologies where the incorporation of the space dimension brings advantages in terms of compactness as well as operation flexibility and versatility.García-Cortijo, S.; Guillem-Cogollos, R.; Ureña-Gisbert, M.; Gasulla Mestre, I. (2020). Space-Division Multiplexing fibers for radiofrequency signal processing. IEEE. 1-2. https://doi.org/10.1109/SUM48678.2020.91610441

Vectors to ore in replacive volcanogenic massive sulfide (VMS) deposits of the northern Iberian Pyrite Belt: Mineral zoning, whole rock geochemistry, and application of portable X-ray fluorescence

In this work we have performed a detailed study of vectors to ore to a representative volcanic-rock-hosted replacive volcanogenic massive sulfide (VMS) deposit located in the northern Iberian Pyrite Belt (Spain), the Aguas Teñidas deposit. The investigated vectors include the following: (1) mineralogical zoning, (2) host sequence characterization and mineralized unit identification based on whole rock geochemistry discrimination diagrams, (3) study of the characteristics and behaviour of whole rock geochemical anomalies around the ore (e.g. alteration-related compositional changes, characteristics and extent of geochemical halos of indicative elements such as Cu, Zn, Pb, Sb, Tl, and Ba around the deposit), and (4) application of portable X-ray fluorescence (p-XRF) analysis to the detection of the previous vectors

Analysis of the Impact of Different Variables on the Energy Demand in Office Buildings

[EN] The design of near zero energy offices is a priority, which involves looking to achieve designs which minimise energy consumption and balance energy requirements with an increase in the installation and consumption of renewable energy. In light of this, some authors have used computer software to achieve simulations of the energy behaviour of buildings. Other studies based on regulatory systems which classify and label energy use also generally make their assessments through the use of software. In Spain, there is an authorised procedure for certifying the energy performance of buildings, and software (LIDER-CALENER unified tool) which is used to demonstrate compliance of the performance of buildings both from the point of view of energy demand and energy consumption. The aim of this study is to analyse the energy behaviour of an office building and the variability of the same using the software in terms of the following variables: climate zone, building orientation and certain surrounding wall types and encasements typical of this type of construction.Fuentes Bargues, JL.; Vivancos, J.; Ferrer-Gisbert, P.; Gimeno-Guillem, MÁ. (2020). Analysis of the Impact of Different Variables on the Energy Demand in Office Buildings. Sustainability. 12(13):1-23. https://doi.org/10.3390/su12135347S1231213Pérez-Lombard, L., Ortiz, J., & Pout, C. (2008). A review on buildings energy consumption information. 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Sustainability, 10(8), 2901. doi:10.3390/su10082901Aparicio Ruiz, P., Sánchez de la Flor, F. J., Molina Felix, J. L., Salmerón Lissén, J., & Guadix Martín, J. (2016). Applying the HVAC systems in an integrated optimization method for residential building’s design. A case study in Spain. Energy and Buildings, 119, 74-84. doi:10.1016/j.enbuild.2016.03.023Royal Decree 235/2013, of 5th April, Agreeing to the Procedure Basic for the Certification of the Energy Efficiency of Buildings https://www.boe.es/buscar/pdf/2013/BOE-A-2013-3904-consolidado.pdfUnified Tool LIDER-CALENER (HULC-Tool) https://veredes.es/blog/en/herramienta-unificada-lider-calener-hulc/Rosselló-Batle, B., Ribas, C., Moià-Pol, A., & Martínez-Moll, V. (2015). An assessment of the relationship between embodied and thermal energy demands in dwellings in a Mediterranean climate. Energy and Buildings, 109, 230-244. doi:10.1016/j.enbuild.2015.10.007Sánchez Ramos, J., Guerrero Delgado, Mc., Álvarez Domínguez, S., Molina Félix, J. L., Sánchez de la Flor, F. J., & Tenorio Ríos, J. A. (2019). Systematic Simplified Simulation Methodology for Deep Energy Retrofitting Towards Nze Targets Using Life Cycle Energy Assessment. 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Simulation of ventilated facades in hot and humid climates. Energy and Buildings, 41(4), 361-373. doi:10.1016/j.enbuild.2008.11.008Lau, A. K. K., Salleh, E., Lim, C. H., & Sulaiman, M. Y. (2016). Potential of shading devices and glazing configurations on cooling energy savings for high-rise office buildings in hot-humid climates: The case of Malaysia. International Journal of Sustainable Built Environment, 5(2), 387-399. doi:10.1016/j.ijsbe.2016.04.004Al-ajmi Farraj F., & Hanby, V. I. (2008). Simulation of energy consumption for Kuwaiti domestic buildings. Energy and Buildings, 40(6), 1101-1109. doi:10.1016/j.enbuild.2007.10.010Raheem, A. A., Issa, R. R., & Olbina, S. (2013). Solar transmittance analysis of different types of sunshades in the Florida climate. Building Simulation, 7(1), 3-11. doi:10.1007/s12273-013-0137-4Valladares-Rendón, L. G., & Lo, S.-L. (2014). Passive shading strategies to reduce outdoor insolation and indoor cooling loads by using overhang devices on a building. 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