Aproximacion a la hidrodinamica de los sistemas hidrotermales Liquido - dominantes asociados a yacimientos de Au-Ag. Aplicacion teorica al sector Almagrera - Herrerias (Almeria)

Los yacimientos epitermales del sector Almagrera-Herrerías parecen originados por un sistema hidrotermal asociado a celdas convectivas superficiales alimentadas por aguas meteóricas/marinas y magmáticas. La simulación matemática de un teórico sistema hidrotermal convectivo muestra la coincidencia entre las zonas mineralizadas conocidas con las zonas de descarga y acumulación de masa predecidas por el modelo. Todo ello, y la existencia de un sistema hidrotermal aún en activo, explica el interés de localizar zonas de descarga del sistema hidrogeológico actual, con el fin de profundizar en la génesis de los yacimientos conocidos y localizar posibles nuevos depósitos.

Datos para la Flora de Jaen

Se relacionan, a continuación, siete táxones seleccionados entre las recolecciones realizadas en junio de 1983 en el complejo orogràfico de la Sierra de Segura-Cazorla (Jaén), por C. Benedí, C. Blanché, J. Molerò y J. Vallès. Los testimonios se encuentran depositados en el herbario BCF.

Corologia de las especies de algas en relacion a ciertos factores ecologicos en el litoral Malagueño

Los estudios taxonómicos, ecológicos y corológicos sobre la vegetación algal bentónica en el litoral malagueño nos han hecho detectar un límite geográfico,entre los alrededores de Marbella y el Faro de Calaburras (Fuengirola), para la gran mayoría de las especies atlánticas que penetran en el Mar de Alborán, especialmente para algunas Fucoceoe y Lominariales. Las corrientes locales, la temperatura y salinidad, así como los distintos factores climatológicos, son los responsables de dicha distribución. En este trabajo se cita por primera vez para el Mediterráneo europeo el taxon Gracilario cervicornis (Turner) J. Ag. Constituyen novedad para la Península Ibérica, las especies: Spermothamnion capitatum (Schousb.) Bornet y Bonnemaisonia hamifera Hariot.

Description of a rare isopod crustacean, Arcturella poorei sp. nov. (Isopoda: Valvifera: Arcturidae), from the Atlantic seaboard of Cadiz (Iberian Peninsula)

This paper describes a new species of arcturidean isopod, Arcturella poorei, from the Atlantic seaboard of Cadiz (Spain). A diagnosis and description of the species is presented, and a comparison with other species of the genus from the area.

Aportacion al conocimiento de los liquenes calcicolas de la provincia de Granada

Adelantamos algunos hallazgos de interés para la flora calcícola del SE de España, poco conocida por el momento. Son nuevas citas para España: Acarospora macrospora, Lecanora prominens. De Heppia reticulata damos la segunda cita, después de la del tipo, de Dufour.

Análisis de los acelerogramas de la serie de Adra (Almería): diciembre 1993 a enero 1994

Se analizan en este trabajo los datos acelerográficos asociados a los dos sismos principales de la denominada serie de Adra. Esta serie está constituida por un conjunto de terremotos de magnitud mb=5.0 que ocurrieron durante los meses de diciembre de 1993 y enero de 1994 en la provincia de Almería, representando el primer caso de registro de gran número de acelerogramas (terremotos principales y replicas) en España.

Between specialization and globalization. The marketing of agrarian products and its environmental impacts seen from a historical perspective: the province of Barcelona in the mid-nineteenth century

Ecological economics has five good reasons to consider that economic globalisation, spurred by commercial and financial fluxes, to be one of the main driving forces responsible for causing environmental degradation to our planet. The first, is the energy consumption and the socio-environmental impacts which long-distance haulage entails. The second, is the ever-increasing flow of goods to far-away destinations which renders their recycling practically impossible. This is particularly significant, because it prevents the metabolic lock of the nutrients present in food and other agrarian products from taking place. The third, is that the high degree of specialization attained in agriculture, forestry, cattle, mining and industry in each region, generates deleterious effects not only on the eco-landscape structure of the uses of the soil, but on the capability to provide habitat and environmental functions to maintain biodiversity as well

Neuroendocrine Tumors (NETs): A population-based study of incidence and survival in Girona province, 1994-2004

Els tumors neuroendocrins (TNEs) són un grup de neoplàsies poc freqüents i heterogènies i amb un ampli espectre d’agressivitat. Hi ha molt poca informació epidemiològica a nivell mundial, l’objectiu d’aquest estudi ha estat el de reportar-ne les dades a la província de Girona. Hem inclòs tots els codis de la ICD-O3 que codifiquen un TNE, període 1994-2002. Hem identificat 698 tumors. Es reporten les dades tant de la casuística com les taxes d’incidència i supervivència de cada TNE per separat. Els resultats són consistents amb les publicacions europees. El fet d’haver reportat la incidència i la supervivència dels TNEs a Girona contribueix a un millor coneixement d’aquestes neoplàsies.

From MuSIASEM theory to practice: report and reflections from field research in Kampot province, Cambodia

This document contains a report and summary of the field research activities in a rural community of rice farmers in Kampot province, Cambodia in 2011, which I conducted within the context of my PhD research at ICTA-UAB (Institute of Environmental Science and Technology, Autonomous University of Barcelona, Spain). The purpose of the field research was to gather data for a MuSIASEM analysis (Multi-Scale Integrated Analysis of Societal and Ecosystem Metabolism) at the village and household level, in order to analyze the multidimensional challenges that small farmers may face nowadays within the context of global rural change and declining access to land. While the literature on MuSIASEM offers a great variety of theoretical explanations and practical applications, there is little information available for students regarding the practical steps required for doing a MuSIASEM analysis at the local level. Within this context, this report offers not only a documentation of the field research design and data collection methods, but further provides a general overview on some organizational and preparative aspects, including some personal reflections, that one may face when preparing and conducting field research for MuSIASEM analysis. In summary, this document thus serves three objectives: (i) to assure methodological transparency for the future work, based on the collected data during field research, (ii) to share my personal experience on the preparative and practical steps required for field research and data collection for a MuSIASEM analysis at the local level, and (iii) to make available for the further interested reader some more detailed background information on the case study village.

Morfogénesis del valle de Sant Miquel de Campmajor

A series of circumstances which converge in a little valley in the province of Girona, result in a peculiar type of morphogenetic evolution and a quite singular mechanical instability of its buttons. Very recent tectonic movements as well as dissolution phenomena of its subsoil due to pressurized underground water have played an important role in the morphogenesis. Such conditions have resulted in a fast morphological evolution which a progressive lowering of the valley floor as well as peculiar morphological features which favour the existence of numerous pits caused by sudden collapses distributed in altitude and time

Interpretación sedimentológica y paleogeográfica del nivel de areniscas eocénicas de Sarrià de Ter (Prov. de Gerona)

There is in this work a description of sedimentological characters of the medium Eocene sandstone level from Sarriá de Ter (Gerona province Spain) and an interpretation of their genesis and situation in the regional paleogeography. The conclusion is that these sandstones form a deltaic channel(delta front). To wards the E and NE the become fluvial deposits, to wards the W, Plana de Vic, they become clay and silstones considered as a prodelta

Serie estratigráfica de Liásico de la provincia de Girona

From several small stratigraphic sections, we have reconstituted the Liassic interval of the Girona Province (NE Spain). We have been able to identify paleontologically the Carixian (Jamesoni, Ibex, and perhaps, Davoei zones), the Lower Domerian (Stockesi zone), and the Middle Toarcian (possibily Variabilis zone, as well as Thouarsense and Insigne zones). The Lower Toarcian (Serpentinus zone) is represented by fossil remains no ‘in situ’. The lowest Toarcián (Tenuicos-tatum zone) as well as the Middle and Upper Domerian (Margaritatus and Spinatum zones respectively, are probably represented by stratigraphic gaps

Ophiolite-related ultramafic rocks (Serpentinites) in the Caribbean region: a review of their occurrence, composition, origin, emplacements and Ni-Laterite soil formation

Ultramafic rocks, mainly serpentinized peridotites of mantle origin, are mostly associated with the ophiolites of Mesozoic age that occur in belts along three of the margins of the Caribbean plate. The most extensive exposures are in Cuba. The ultramafic-mafic association (ophiolites) were formed and emplaced in several different tectonic environments. Mineralogical studies of the ultramafic rocks and the chemistry of the associated mafic rocks indicate that most of the ultramafic-mafic associations in both the northern and southern margins of the plate were formed in arc-related environments. There is little mantle peridotite exposed in the ophiolitic associations of the west coast of Central America, in the south Caribbean in Curacao and in the Andean belts in Colombia. In these occurrences the chemistry and age of the mafic rocks indicates that this association is mainly part of the 89 Ma Caribbean plateau province. The age of the mantle peridotites and associated ophiolites is probably mainly late Jurassic or Early Cretaceous. Emplacement of the ophiolites possibly began in the Early Cretaceous in Hispaniola and Puerto Rico, but most emplacement took place in the Late Cretaceous to Eocene (e.g. Cuba). Along the northern South America plate margin, in the Caribbean mountain belt, emplacement was by major thrusting and probably was not completed until the Oligocene or even the early Miocene. Caribbean mantle peridotites, before serpentinization, were mainly harzburgites, but dunites and lherzolites are also present. In detail, the mineralogical and chemical composition varies even within one ultramafic body, reflecting melting processes and peridotite/melt interaction in the upper mantle. At least for the northern Caribbean, uplift (postemplacement tectonics) exposed the ultramafic massifs as a land surface to effective laterization in the beginning of the Miocene. Tectonic factors, determining the uplift, exposing the peridotites to weathering varied. In the northern Caribbean, in Guatemala, Jamaica, and Hispaniola, uplift occurred as a result of transpresional movement along pre-existing major faults. In Cuba, uplift occurred on a regional scale, determined by isostatic adjustment. In the south Caribbean, uplift of the Cordillera de la Costa and Serrania del Interior exposing the peridotites, also appears to be related to strike-slip movement along the El Pilar fault system. In the Caribbean, Ni-laterite deposits are currently being mined in the central Dominican Republic, eastern Cuba, northern Venezuela and northwest Colombia. Although apparently formed over ultramafic rocks of similar composition and under similar climatic conditions, the composition of the lateritic soils varies. Factors that probably determined these differences in laterite composition are geomorphology, topography, drainage and tectonics. According to the mineralogy of principal ore-bearing phases, Dominican Ni-laterite deposits are classified as the hydrous silicate-type. The main Ni-bearing minerals are hydrated Mg-Ni silicates (serpentine and ¿garnierite¿) occurring deeper in the profile (saprolite horizon). In contrast, in the deposits of eastern Cuba, the Ni and Cooccurs mainly in the limonite zone composed of Fe hydroxides and oxides as the dominant mineralogy in the upper part of the profile, and are classified as the oxide-type.

An agency-oriented model to explain vine-growing specialization in the province of Barcelona (Catalonia, Spain) in the mid-nineteenth century

[cat] En aquest treball presentem un model per explicar el procés d’especialització vitícola assolit als municipis de la província de Barcelona, a mitjans del s. XIX,que cerca entendre com va sorgir històricament un avantatge comparatiu fruit d’un procés que esdevindria un dels punts de partida del procés d’industrialització a Catalunya. Els resultats confirmen els papers jugats pel impuls “Boserupià” de la població en un context d’intensificació de l’ús de la terra, i d’un impuls del mercat “Smithià” en un context d’expansió de la demanda per part de les economies atlàntiques. També es posa de manifest la importància de les dotacions agro-ecològiques i les condicions socioinstitucionals relacionades amb la desigualtat d’ingrés. La difusió de la vinya donà com a resultat unes comunitats rurals menys desiguals fins al 1820, tot i que aquesta desigualtat augmentà de nou a partir d'aleshores.