763 research outputs found

    Ordovician and Silurian igneous rocks and orthogeneisses in the Catalonian Coastel Ranges

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    These rocks exhibit calc-alkaline affinities and may have originated by partial melting of the crust in a post-collision, anorogenic setting. Orthogneisses derived from biotite-bearing leucogranites occur within aprobably cambrian heterogeneous series. Petrological and geochemical features suggest that they might be genetically related to the ordovician vulcanites. Basic sills and volcanoclastic rocks occur intercalated within a mainly pelitic formation in the lower part of the Silurian sequence. The silurian igneous rocks are alkali basalts and may reflect an extensional regime

    El agua como infraestructura social: el caso de Turbo

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    Los servicios ambientales que presta un territorio son de gran importancia para los asentamientos humanos, que se establecen y generan una alta dependencia de estos, especialmente para las poblaciones de las ciudades pequeñas y medianas, como las que constituyen en gran medida el territorio colombiano, que aún tienen una alta dependencia directa de estos servicios y en las cuales sus dinámicas socio-económicas más importantes giran en torno a estos -- Entre estos recursos fundamentales destaca uno en particular, el agua -- Sobre las fuentes hídricas como océanos o ríos se han asentado a lo largo de la historia las grandes ciudades y a día de hoy es nuestro medio de intercambio económico más importante -- Pero aún con la importancia de estos recursos para la vida humana y el sostenimiento de las ciudades, diferentes procesos generados por la actividad humana tales como la alta y acelerada urbanización que han vivido las ciudades alrededor del mundo, la extracción de estos para procesos industriales o directamente un mal manejo de los mismos, ha conllevado a que se encuentren en gran deterioro y que en la actualidad esta problemática este en la agenda de todos los gobiernos como el reto a futuro de nuestra sociedad -- Pero desde esta perspectiva es importante entender que el problema no es solo del manejo que las grandes compañías o los gobiernos le den a estos bienes ambientales, también está en el accionar del día a día de las personas sobre estos, convirtiendo la problemática medio ambiental en un tema micro social de relación con el entorno, que requiere encontrar soluciones desde las mismas comunidades que dependen de este para ser superado

    Ordovician and Silurian igneous rocks and orthogeneisses in the Catalonian Coastel Ranges

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    These rocks exhibit calc-alkaline affinities and may have originated by partial melting of the crust in a post-collision, anorogenic setting. Orthogneisses derived from biotite-bearing leucogranites occur within aprobably cambrian heterogeneous series. Petrological and geochemical features suggest that they might be genetically related to the ordovician vulcanites. Basic sills and volcanoclastic rocks occur intercalated within a mainly pelitic formation in the lower part of the Silurian sequence. The silurian igneous rocks are alkali basalts and may reflect an extensional regime

    Missed opportunities for vaccination (MOV) in children up to 5 years old in 19 Médecins Sans Frontières-supported health facilities: a cross-sectional survey in six low-resource countries

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    Community child health; Epidemiology; Public healthSalud infantil comunitaria; Epidemiología; Salud públicaSalut infantil comunitària; Epidemiologia; Salut PúblicaObjective To describe missed opportunities for vaccination (MOV) among children visiting Médecins Sans Frontières (MSF)-supported facilities, their related factors, and to identify reasons for non-vaccination. Design Cross-sectional surveys conducted between 2011 and 2015. Setting and participants Children up to 59 months of age visiting 19 MSF-supported facilities (15 primary healthcare centres and four hospitals) in Afghanistan, Democratic Republic of the Congo, Mauritania, Niger, Pakistan and South Sudan. Only children whose caregivers presented their vaccination card were included. Outcome measures We describe MOV prevalence and reasons for no vaccination. We also assess the association of MOV with age, type of facility and reason for visit. Results Among 5055 children’s caregivers interviewed, 2738 presented a vaccination card of whom 62.8% were eligible for vaccination, and of those, 64.6% had an MOV. Presence of MOV was more likely in children visiting a hospital or a health facility for a reason other than vaccination. MOV occurrence was significantly higher among children aged 12–23 months (84.4%) and 24–59 months (88.3%) compared with children below 12 months (56.2%, p≤0.001). Main reasons reported by caregivers for MOV were lack of vaccines (40.3%), reason unknown (31.2%) and not being informed (17.6%). Conclusions Avoiding MOV should remain a priority in low-resource settings, in line with the new ‘Immunization Agenda 2030’. Children beyond their second year of life are particularly vulnerable for MOV. We strongly recommend assessment of eligibility for vaccination as routine healthcare practice regardless of the reason for the visit by screening vaccination card. Strengthening implementation of ‘Second year of life’ visits and catch-up activities are proposed strategies to reduce MOV

    The Linares granite (Jaén): cartography, petrology and geochemistry

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    [Abstract] Magma emplacement within the Linares granite, a part of the Los Pedroches Batholith, took place in the sequence: biotite granodiorite with microgranular enclaves, biotite monzogranites, and dike swarm complexo Dikes are: WNWESE rhyolite to rhyodacite, aplopegmatite and abundant NE-SW ore-bearing quartz. The Linares intrusion and psamo-pelitic Carboniferous host metasediments (Los Pedroches Culm) are, in part, discordantly covered by Mesozoic (Trias) and Tertiary to Quaternary terrigenous deposits. Bulk rock chemistry of granodiorite shows minor variations in Si02 (64.75... 67 wt %) and REE contents (LREE = 158 -160 ppm), and nearly constant Al CNK (ISA) ratio (1.1 - 1.15). Monzogranites have higher Si02 (66.87 - 68.4 wt %), alkali and REE contents (LREE = 168 - 193 ppm), with A/CNK (ISA) ratio of 1.06 - 1.09. Both granodiorite and monzogranites are peraluminous rocks that may correspond to an aluminous association or to evolved terms of an aluminocafemic association (Debon & Lefort, 1983). Variation diagrams for major and trace elements, including REE, of granodiorite and monzogranites are compatible with magmatic differentiation processes by fractional crystallization starting from a primary granodioritic magma

    Geochemistry of A Espenuca two-mica granite: origin and evolution

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    [Abstract] The A Espenuca two-mica granite, situated in the northern sector ofthe Central Iberian Zone, was variably deformed by the Valdoviño Fault. Deformation intensity is observed to increase from W to E, also being more intense in the northern half. Results of the geochemical study of the less deformed granite facies, known in the regionalliterature as the «weakly deformed facies», are presented. Chemical variations are faint (DSi02 z 4%) and reflect a whole composition close to the granite minimum. Analyzed samples correspond to alkali-dch(Na20+K20, x = 8.4 %), CaO-depleted rocks « 0.9 %), showing very low values for the B (=Fe+Mg+Ti) parameter x = 30, and a marked peraluminous character, A/CNK, x =1.16 (range 1.1-1.26), which from the mineralogical point of view is traduced in the occurrence of muscovite (± garnet). The rocks studied are depleted in REE (LREE =75.77-189.83; x = 117.4), notably in the HREE. They exhibit considerably fractionated pattern (La/Lu)n x = 50 as well as important Eu negative anomalies (Eu/Eu*, x = 0.36). These rocks can be linked by fractionated crystallization processes. Massbalance calculations indicate crystallization ratios < 30%, the fractionated minerals being Kfs, Bt, PI. These values to explain the trace element variations observed in the different samples. The chemical-mineralogical composition of analyzed facies suggests an origin by partial melting of crustal rocks (either pelites, schists, meta-greywackes or orthoderived materials) at considerable depths, where garnet constitutes a restite stable phase. Nevertheless, calculated models show that not aH these materials equally adjust as source to the granite magma. The best fits are obtained considering a source similar to 0110 de Sapo gneisses. Key Words: Two-mica granite, fractional crystallization, partia

    The Santa Elena stock (Jaén). An intrusion genetically independent fram the magmatic association of the Los Pedroches Batolith

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    [Abstract] The Santa Elena stock has been classically considered as belonging to the magmatic association ofthe Los Pedroches Batolith. The stock is intrusive into psammo-pelitic materials Ordovician to Carboniferousin age. The Santa Elena stock is composed of biotite granodiorite to tonalite with gabbro-diorite as enclaves ofvariable size outcropping in northern sectors ofthe intrusion. Pelitic xenoliths ofvarious sizes, likely related to magma stopping, are common through the massif. The Santa Elena stock is intruded by a dike complex made of aplite and ore-bearing quartz veins. The two main lithological units exhibit different geochemical features with local evidence ofmagmamixing between acid and basic types. The granodioritetonalite is chemically homogeneous regarding the content of major and trace elements, including REE. These rocks correspond to mildly peraluminous terms ofan alumino-cafemic association ofcalc-alkaline character.The gabbrodiorite enclaves are meta-aluminous and clearly deviate from the geochemical trend defined by granodiorite and tonalite. The rocks from the Santa Elena stock are very different from the common granodiorite types ofthe Los Pedroches Batolith. It appears from the petrological and geochemical data that the Santa Elena stock corresponds to an independent and different magmafrom that at the origin ofthe Los Pedroches to which it had been classically associated

    Identifying future hotspots of fire danger in the tropics: climate fire predictions for 2050, 2075 and 2100

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    Recent bursts in the incidence of large wildfires worldwide have raised concerns about the influence that climate and humans may have on future fire activity. Climate strongly influences global wildfire activity, and recent wildfire surges may signal fire weather-induced pyrogeographic shifts. Fire weather seasons have lengthened across ca.3 0 million km2 (25 % of the Earth’s vegetated surface), resulting in an 19% increase in global mean fire weather season length, which would allow for a doubling of the global burnable area affected if these fire weather changes were coupled with ignition sources and available fuel, which are largely controlled by humans. Disagreement exists on the relative importance of climate versus human drivers in shaping global fire regimes, with a particular gap in the pantropical region where fire has had a long presence in savannas, montane grasslands and dry forest ecosystems, but it has had a much more recent, infrequent and unknown role in many moist forest ecosystems such as rainforests and cloud montane forests. Either climate or human induced, scenarios of future increases in burned area (fire danger) are needed to i) navigate fire danger reduction policies (e.g fire management that controls prevention, suppression and restoration), ii) to understand how to improve fire-resilient landscapes, iii) to reduce Greenhouse Gas emissions from fire, particularly in regions with carbon-dense fires, and iv) to support capacity building for effective fire management development and implementation. In this research we map pantropical future fire danger in 2050 (2025-2049), 2075 (2050-2074), 2100 (2075-2099). Fire danger is here understood as the probability of fire spreading over more extended areas under severe climatic conditions (precipitation, temperature and drought), under more extreme future conditions determined by the CMIP5 data. Because human decisions on the land are difficult to model and project in the future, we here focus on projecting climate-driven fire danger only

    General population knowledge about extreme heat: a cross sectional survey in Lisbon and Madrid

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    Extreme heat is associated with an increased mortality and morbidity. National heat plans have been implemented to minimize the effect of extreme heat. The population’s awareness and knowledge of national heat plans and extreme heat is essential to improve the community’s behavior and adaptation. A general population survey was conducted in Lisbon and in Madrid to assess this knowledge. We used a questionnaire to interview passers-by. Results were compared between Lisbon and Madrid and between locals and foreigners, using Pearson Chi-square tests and Fisher's exact test. We conducted 260 interviews in six locations of different socio-economic backgrounds in each city. The most frequently mentioned extreme heat-related risk groups were the elderly (79.2%), children (49.6%) and babies (21.5%). The most frequently reported protective measures were increased fluid intake (73.1%) and avoiding exposure to the sun (50.8%). Knowledge about the heat plan was higher in Lisbon (37.2%) than in Madrid (25.2%) (p-value = 0.03). Foreigners had less knowledge of risk groups compared to locals. Heat plans were not widely known in Madrid and Lisbon. Nonetheless, knowledge of practical concepts to face extreme heat, such as certain risk groups and protective measures, was found. Our results were similar to comparable surveys where specific respondents’ groups were identified as less knowledgeable. This highlighted the importance of addressing these groups when communicating public health messages on heat. Foreigners should be specifically targeted to increase their awarenessinfo:eu-repo/semantics/publishedVersio
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