Hercynian Metamorphism in the Catalonian Coastal Ranges

Paleozoic rocks in the Catalonian Coastal Ranges are in their largestpart affectedby alow- tovery-low gradeHercynian metamorphism. Amphibolite facies conditions are only found in restricted areas such as the southwestern part of the Guilleries massif where upper amphibolite facies conditions are reached. Metamorphic grade increases from top to bottom of the Paleozoic stratigraphic sequence and the metamorphic peak is diachronous, being progressively older in the lower grade metamorphic zones. The isograd pattern, mineral assemblages, mineral chemistry and preserved reaction textures are consistent with a low pressure metamorphism possibly evolving from a previous Barrovian type event. The metamorphic climax in the high grade zone was reached after the seconddeformational phase. Calculatedpeak P-Tconditions are 620-640 OC and around 3.5 Kb . A latter episode of decompression from the maximum conditions to 1-2 Kb, with an associated temperature decrease to 530-550 OC, is recognized. The intrusion of late Hercynian granitoids produced contact metamorphic aureoles where the pyroxene-hornfels facies is locally reached.Los materiales prehercínicos de las cadenas Costero-Catalanas están en su mayor parte afectados por un metamorfismo regional Hercínico de bajo o muy bajo grado, alcanzándose en áreas mas restringidas la facies anfibolitica y al SO del macizo de Guilleries condiciones de alto grado. La intensidad del metamorfismo aumenta hacia 10s materiales mis antiguos, teniendo lugar el climax cada vez mas tarde en el tiempo a medida que aumenta el grado metamórfico. Las asociaciones minerales, composición mineralógica y reacciones observadas muestran para diferentes áreas un clímax metamórfico del tipo de baja presión, con una posible etapa anterior de presión intermedia. En las zonas de alto grado el clímax se alcanza posteriormente a la segunda fase de deformación Hercínica, cifrándose las condiciones máximas de P y T alrededor de 3.5 Kb a una temperatura entre 620-640 T. produciéndose a continuación una descompresión hasta 1-2 Kb asociada a un pequeño descens0 de la temperatura (530-550"). La posterior intrusión de granitoides tardihercinicos provoca aureolas de metamorfismo de contacto de hasta 2km de espesor, alcanzándose localmente la facies de las corneanas piroxénicas

Equilibrios minerales y zonación de granates en el nucleo del domo del Tormes (provincias de Salamanca y Zamora)

El estudio de la zonación en 1os granates de gneises pelíticos pertenecientes al núcleo del domo del Tormes indica el carácter retrógrado de estos y confirma la existencia de las siguientes reacciones observadas petrográficamente en anteriores trabajos: Gt+Als+Qz+H,O -> Cd ; Bi+Als+Qz -> Cd+Fk+H,O ; Bi+Als+Qz->Gt+Cd+Fk+H20; CaGt+Als+Qz ->Capl. El conocimiento de 1os campos de estabilidad de las reacciones que se producen en estas rocas y las observaciones petrográficas indican que ha tenido lugar la reacción de retrogradación Cd+Fk+H,O --> Bi+Mu+Qz, siendo probable además que parte del granate se haya formado según Bi+Mu+Qz -> Gt+Fk+H,O. Finalmente se propone una trayectoria P-T para 1os estadios finales de evolución del núcleo del domo basada en 1os anteriores equilibrios y en sus campos de estabilidad teóricos.Garnets in the Tormes dome core area show a conspicuous retrograde diffusion zoning. The Fe, Mg, Ca, and Mn distribution in this mineral is consistent whith the reactions Gt+Als+Qz+H,O > Cd; Bi+Als+Qz -> Cd+Fk+H,O;Bi+Als+Qz -> Gt+Cd+Fk+H,O CaGt+Als+Qz-> CaPl petrographicaly predicted in previous papers. In addition, petrographic observations contrasted with a petrogenetic grid developed for these rocks suggest that reactions Cd+Fk+H,O -> Bi+Mu+Qz and Gt+Fk+H,O -> Bi+Mu+Qz take place. Previous data allow to draw a semiquantitative P-T-t path for the latest metamorphic stages

Phase equilibria and P-T-X (Fe-Mg) relations involving GT-St-Cd-Als-Bi-Mu-Qz-Kfs-H20 in medium-high grade metapelites (KFASH,KMASH and KFMASH systems)

En rocas metapelíticas de diversas áreas en el Hercínico de la Península Ibérica se observan a menudo las siguientes reacciones: Estaurolita + moscovita + cuarzo = biotita + Al2SiO5+ H2O Granate + moscovita = Al2SiO5 + biotita ± cuarzo Biotita + Al2SiO5 + cuarzo = cordierita + feldespato potásico + H2O. Se han estudiado en el sistema con K2O -FeO- Al2O3-SiO2-H2O (KFASH) tres asociacioness con Bi-Mu-St-Als-Qz- H2O además de Cd-Gt-Fk, eliminando en cada una de ellas una de las tres últimas fases. La expansión de las reacciones que se obtienen con estas asociaciones, en superficies divariantes a través del espacio P-T-X(Fe-Mg), se realizó estudiando la asociación GtSt- Cd-Bi-Mu-Fk-Als-Qz- H2 en el sistema KFMASH con una relación Fe/Fe+Mg según Gt St Bi Cd, tal como se observa en la mayoría de roca pelíticas. A partir de las anteriores redes se ba obtenido otra para condiciones de PH20=Pt baja fugacidad de oxígeno (tampón QFM), y exceso de moscovita y cuarzo. Las pendientes de las reacciones en esta última red se calcularon para diferentes condiciones poTo Se han obtenido las relaciones teóricas P-T-X(Fe-Mg) para tres reacciones univariantes y trece divariantes. La red confirma la imposibilidad de la coexistencia entre estaurolita y feldespato potásico y entre granate, cordierita y moscovita. Se constata, además, la extensión de los campos de estabilidad de Gt-St, Cd-St y Gt-Cd en metapelitas pobres en moscovita.In different areas of the Hercynian in the Iberian Peninsula sorne reactions are repeatedly observed in pelites, these reactions are: Staurolite + muscovite + quartz = Biotite+ Al2SiOs+ H20 Garnet + muscovite = AI2SiOs+ biotite+ quartz Biotite + Al2SiOs + quartz = Cordierite + K feldspar+Hp In order to examinate the P-T stability fields of tbese, and otber similar reactions, aH the univariant equilibria in multisystems with Gt-Cd-St-Bi-Mu-Als-Qz-HP, Gt-St-Bi-Mu-Fk-AIs-QzHp and Cd-St-Bi-Mu-Fk-AIs-Qz-H20 in Kp-FeO-AI20 r Si02-H20 (KFASH) system have been calculated, and their corresponding P-T grids have been constructed. The expansion of these reactions into divariant surfaces through the P-T-X (Fe-Mg) space was made by studying the assemblage Gt-Cd-St-Bi-Mu-Fk-AIs-Qz-HP in Kp-FeO-MgO-AIP3-Si02-Hp (KFMASH) with a Fe/Fe+Mg relationship Gt>St>Bi>Cd such as observed in most of natural pelites. A resultant grid was obtained by combining those obtained in the aboye systerns. This grid has been P-T located for PH2o =P" near QFM buffer, and excess muscovite and quartz conditions Reaction slopes in this grid were calculated within different P-T surroundings from thermodynamic data as weH as by considering the existing experimental data. In addition to the stability fields of reactions tbe P-T-XFe_Mg theoric relations for three univariant and thirteen divariant reactions have been obtained. The grid confirms the imposibility of staurolite-K feldspar and Garnet-Cordierite-Muscovite coexistence, as weH as the extension of the stability fields for Garnet-Staurolite, Cordierite-Staurolite and Garnet-Cordierite assemblages in muscovite-poor metapelites

Omaisten saama tuki ja selviytymiskeinot läheisen kuoltua

Krueger, Merja. Omaisten saama tuki ja selviytymiskeinot läheisen kuoltua. Diak Länsi, Pori, kevät 2012, 41 s., 2 liitettä. Daikonia-ammattikorkeakoulu, sosiaalialan koulutusohjelma, Diakonisen sosiaalityön suuntautumisvaihtoehto, sosionomi (AMK)+ diakonian virkakelpoisuus. Opinnäytetyö pohjautuu tutkimukselliseen tietoon. Empiirisen aineiston avulla haettiin vastausta tutkimuskysymykseen siitä, mistä läheisensä menettäneet saivat tukea ja apua silloin, kun heitä kohtasi ehkä elämänsä vaikein tilanne. Tutkimus toi samalla esille kunnan ja seurakunnan palvelutarjontaa läheisensä menettäneille. Tavoitteena oli selvittää, mistä omaiset saivat apua, minkälaista tuki oli ja kokivatko he sen tarpeelliseksi. Aineiston keruumenetelminä käytettiin kirjallisuutta, lehtiartikkeleita, opinnäytetöitä, www-sivustoja, paikallisen kunnan ja seurakunnan työntekijöiden asiantuntemusta sekä vuosina 2000 - 2010 kuolleiden henkilöiden omaisten kokemuksia. Kunnan ja seurakunnan työntekijät kertoivat vapaamuotoisesti palvelutarjonnastaan ja käytännöistään heille asetettujen kysymysten turvin. Omaisten kokemuksia koottiin haastatteluilla kyselylomakkeen avulla, joka suoritettiin henkilökohtaisesti paikkakunnan hautausmaalla. Kyselyyn osallistuivat 12 henkilöä, joista yksi oli mies ja loput naisia. Lähestymistapa opinnäytetyön aineiston keruu- ja analysointimenetelmiin oli pääsääntöisesti fenomenologisen tutkimuksen kvalitatiivista sisällön analyysiä. tutkimuksessa pyrittiin ymmärtämään inhimillisen toiminnan ja kokemuksen subjektiivista merkitystä silloin, kun ihminen on menettänyt läheisensä. Päätulokset osoittivat, että läheisten tuki oli merkittävintä pienellä paikkakunnalla, jossa sukulaisia oli runsaasti ja ihmiset tunsivat naapurustonsa. Vaikeuksia ei myöskään ollut tarpeellisen avun hakemisessa eri palveluntuottajilta niiden näkyvyyden vuoksi. Johtopäätöksenä voi pitää sitä, että tukitoimenpiteitä läheisensä menettäneille oli myös pienellä paikkakunnalla saatavissa, jos asianomainen vain halusi hakeutua niiden piiriin tai ottaa niitä vastaan. Luonnollisesti pienen paikkakunnan palvelutarjonta oli kapea-alaista, mutta tarvittaessa apua sai pyytää myös naapurikunnista ja -seurakunnista.Krueger, Merja. Relatives to Receive Subsidies And Coping Ways after The Death of a Close. 41 p., 2 appendices. Language: Finnish. Pori, Autumn 2012. Diaconia University of Applied Sciences. Degree Programme in Social Services, Option in Diaconal Social Work. Degree: Bachelor of Social Services + Deacon. The thesis based on researched empirical data. Using these data, the aim was to answer how people who had lost their near relatives got support in the situation, where they faced one of the most difficult situations in their lives. The thesis also found out what kind of services the municipality and the congregation provided to the bereaved. The research questions were, where the bereaved got support, what the quality of the support was and if they considered it valuable? The data were collected from literature, articles, theses, Internet repositories, specialists in local municipality and congregation and from interviewing people who had lost their family member during 2000 – 2010. The specialists casually explained their supply of services and their institutions. The experiences of the bereaved were collected by an enquiry conducted personally at the graveyard of the municipality. In all, 12 closest relatives responded. One of them was male and eleven female. The approach to collecting data and the analysis of the material were mainly phenomenological qualitative content analysis. The thesis was trying to understand the subjective meaning of human behaviour and experience in a situation where a family member had passed away. The main results were proved, that in a small municipality, where one had lots of relatives and people knew their neighbours, the support given by the family and intimate friends was considered most important. It seems that it was not difficult to ask for support when needed from different service providers because of their broad coverage. The conclusion was that measures of support for the bereaved was also in a small municipality, if the bereaved considered it necessary. Naturally, the services of a small municipality were restricted, but help could be solicited on demand from nearby municipalities and congregations. Keywords: death, sorrow, social services, relatives, social work done by a church, suppor

Experiencias de innovación educativa - Tomo 5

El laboratorio de Experiencias de Aprendizaje Inmersivo para Educación Virtual del Politécnico Grancolombiano presenta este libro que consolida once nuevos proyectos trabajados durante el año 2021. Para este año se implementan once proyectos nuevos que se presentan en este libro, de los cuales cinco son laboratorios virtuales, uno es un laboratorio de realidades hibridas que se transforma en una apuesta institucional al ser único para el área de aerolíneas, buscando fortalecer el programa virtual de Psicología se realizaron cuatro simuladores y una serie de juegos serios para la salud laboral, otro juego serio sobre la teoría de juegos y por último un simulador para la gestión de inventarios

Geographic patterns of tree dispersal modes in Amazonia and their ecological correlates

Aim: To investigate the geographic patterns and ecological correlates in the geographic distribution of the most common tree dispersal modes in Amazonia (endozoochory, synzoochory, anemochory and hydrochory). We examined if the proportional abundance of these dispersal modes could be explained by the availability of dispersal agents (disperser-availability hypothesis) and/or the availability of resources for constructing zoochorous fruits (resource-availability hypothesis). Time period: Tree-inventory plots established between 1934 and 2019. Major taxa studied: Trees with a diameter at breast height (DBH) ≥ 9.55 cm. Location: Amazonia, here defined as the lowland rain forests of the Amazon River basin and the Guiana Shield. Methods: We assigned dispersal modes to a total of 5433 species and morphospecies within 1877 tree-inventory plots across terra-firme, seasonally flooded, and permanently flooded forests. We investigated geographic patterns in the proportional abundance of dispersal modes. We performed an abundance-weighted mean pairwise distance (MPD) test and fit generalized linear models (GLMs) to explain the geographic distribution of dispersal modes. Results: Anemochory was significantly, positively associated with mean annual wind speed, and hydrochory was significantly higher in flooded forests. Dispersal modes did not consistently show significant associations with the availability of resources for constructing zoochorous fruits. A lower dissimilarity in dispersal modes, resulting from a higher dominance of endozoochory, occurred in terra-firme forests (excluding podzols) compared to flooded forests. Main conclusions: The disperser-availability hypothesis was well supported for abiotic dispersal modes (anemochory and hydrochory). The availability of resources for constructing zoochorous fruits seems an unlikely explanation for the distribution of dispersal modes in Amazonia. The association between frugivores and the proportional abundance of zoochory requires further research, as tree recruitment not only depends on dispersal vectors but also on conditions that favour or limit seedling recruitment across forest types

Geography and ecology shape the phylogenetic composition of Amazonian tree communities

AimAmazonia hosts more tree species from numerous evolutionary lineages, both young and ancient, than any other biogeographic region. Previous studies have shown that tree lineages colonized multiple edaphic environments and dispersed widely across Amazonia, leading to a hypothesis, which we test, that lineages should not be strongly associated with either geographic regions or edaphic forest types.LocationAmazonia.TaxonAngiosperms (Magnoliids; Monocots; Eudicots).MethodsData for the abundance of 5082 tree species in 1989 plots were combined with a mega-phylogeny. We applied evolutionary ordination to assess how phylogenetic composition varies across Amazonia. We used variation partitioning and Moran's eigenvector maps (MEM) to test and quantify the separate and joint contributions of spatial and environmental variables to explain the phylogenetic composition of plots. We tested the indicator value of lineages for geographic regions and edaphic forest types and mapped associations onto the phylogeny.ResultsIn the terra firme and várzea forest types, the phylogenetic composition varies by geographic region, but the igapó and white-sand forest types retain a unique evolutionary signature regardless of region. Overall, we find that soil chemistry, climate and topography explain 24% of the variation in phylogenetic composition, with 79% of that variation being spatially structured (R2 = 19% overall for combined spatial/environmental effects). The phylogenetic composition also shows substantial spatial patterns not related to the environmental variables we quantified (R2 = 28%). A greater number of lineages were significant indicators of geographic regions than forest types.Main ConclusionNumerous tree lineages, including some ancient ones (>66 Ma), show strong associations with geographic regions and edaphic forest types of Amazonia. This shows that specialization in specific edaphic environments has played a long-standing role in the evolutionary assembly of Amazonian forests. Furthermore, many lineages, even those that have dispersed across Amazonia, dominate within a specific region, likely because of phylogenetically conserved niches for environmental conditions that are prevalent within regions

Geography and ecology shape the phylogenetic composition of Amazonian tree communities

Aim: Amazonia hosts more tree species from numerous evolutionary lineages, both young and ancient, than any other biogeographic region. Previous studies have shown that tree lineages colonized multiple edaphic environments and dispersed widely across Amazonia, leading to a hypothesis, which we test, that lineages should not be strongly associated with either geographic regions or edaphic forest types. Location: Amazonia. Taxon: Angiosperms (Magnoliids; Monocots; Eudicots). Methods: Data for the abundance of 5082 tree species in 1989 plots were combined with a mega-phylogeny. We applied evolutionary ordination to assess how phylogenetic composition varies across Amazonia. We used variation partitioning and Moran\u27s eigenvector maps (MEM) to test and quantify the separate and joint contributions of spatial and environmental variables to explain the phylogenetic composition of plots. We tested the indicator value of lineages for geographic regions and edaphic forest types and mapped associations onto the phylogeny. Results: In the terra firme and várzea forest types, the phylogenetic composition varies by geographic region, but the igapó and white-sand forest types retain a unique evolutionary signature regardless of region. Overall, we find that soil chemistry, climate and topography explain 24% of the variation in phylogenetic composition, with 79% of that variation being spatially structured (R$^{2}$ = 19% overall for combined spatial/environmental effects). The phylogenetic composition also shows substantial spatial patterns not related to the environmental variables we quantified (R$^{2}$ = 28%). A greater number of lineages were significant indicators of geographic regions than forest types. Main Conclusion: Numerous tree lineages, including some ancient ones (>66 Ma), show strong associations with geographic regions and edaphic forest types of Amazonia. This shows that specialization in specific edaphic environments has played a long-standing role in the evolutionary assembly of Amazonian forests. Furthermore, many lineages, even those that have dispersed across Amazonia, dominate within a specific region, likely because of phylogenetically conserved niches for environmental conditions that are prevalent within regions

Mapping density, diversity and species-richness of the Amazon tree flora

Using 2.046 botanically-inventoried tree plots across the largest tropical forest on Earth, we mapped tree species-diversity and tree species-richness at 0.1-degree resolution, and investigated drivers for diversity and richness. Using only location, stratified by forest type, as predictor, our spatial model, to the best of our knowledge, provides the most accurate map of tree diversity in Amazonia to date, explaining approximately 70% of the tree diversity and species-richness. Large soil-forest combinations determine a significant percentage of the variation in tree species-richness and tree alpha-diversity in Amazonian forest-plots. We suggest that the size and fragmentation of these systems drive their large-scale diversity patterns and hence local diversity. A model not using location but cumulative water deficit, tree density, and temperature seasonality explains 47% of the tree species-richness in the terra-firme forest in Amazonia. Over large areas across Amazonia, residuals of this relationship are small and poorly spatially structured, suggesting that much of the residual variation may be local. The Guyana Shield area has consistently negative residuals, showing that this area has lower tree species-richness than expected by our models. We provide extensive plot meta-data, including tree density, tree alpha-diversity and tree species-richness results and gridded maps at 0.1-degree resolution

Consistent patterns of common species across tropical tree communities

Trees structure the Earth’s most biodiverse ecosystem, tropical forests. The vast number of tree species presents a formidable challenge to understanding these forests, including their response to environmental change, as very little is known about most tropical tree species. A focus on the common species may circumvent this challenge. Here we investigate abundance patterns of common tree species using inventory data on 1,003,805 trees with trunk diameters of at least 10 cm across 1,568 locations1,2,3,4,5,6 in closed-canopy, structurally intact old-growth tropical forests in Africa, Amazonia and Southeast Asia. We estimate that 2.2%, 2.2% and 2.3% of species comprise 50% of the tropical trees in these regions, respectively. Extrapolating across all closed-canopy tropical forests, we estimate that just 1,053 species comprise half of Earth’s 800 billion tropical trees with trunk diameters of at least 10 cm. Despite differing biogeographic, climatic and anthropogenic histories7, we find notably consistent patterns of common species and species abundance distributions across the continents. This suggests that fundamental mechanisms of tree community assembly may apply to all tropical forests. Resampling analyses show that the most common species are likely to belong to a manageable list of known species, enabling targeted efforts to understand their ecology. Although they do not detract from the importance of rare species, our results open new opportunities to understand the world’s most diverse forests, including modelling their response to environmental change, by focusing on the common species that constitute the majority of their trees.Publisher PDFPeer reviewe