Petrophysical properties in the Iberian Range and surrounding areas (NE Spain): 1-density

We introduce the first map of density data in Northeastern Spain which can help in the interpretation of gravimetric surveying. The background map is a simplified version of the Geode continuous geological cartography (scale 1:200.000) of the Iberian Range and Ebro basin. These maps are synthetic and homogeneous maps based on previous 1:50, 000 scale geological maps (MAGNA). The map uses the ETRS89 datum and UTM coordinates (30T northern zone) and covers an area of 140, 000 sq km. The compiled data shown in the map come from previous papers of the region (˜ 700 points) as well as from more than 800 additional points developed in the course of an exploratory project focused on the underground characterization of a potential CO2 reservoir in the so-called ‘Linking Zone''. The new data accomplish some basic criteria; they are accurately georeferenced and lithology, stratigraphic age and other technical details about the measurements (e.g. means and error) and methods are fully displayed

Estudio de las rocas paleozoicas y los macizos graníticos que afloran en el Parc Natural de l'Alt Pirineu y zonas colindantes mediante datos geológicos, geofísicos y petrofísicos

The Parc Natural de l’Alt Pirineu is located between the La Maladeta and Andorra- Mount Louis granites. The characterization of the Parc’s geology at depth can help to know the emplacement mechanism of these granites, their relationships with the plutonic and volcanic rocks outcropping to the North and South of the Parc, respectively, and if all these rocks belong to the same magmatic system. To achieve these objectives, in the frame of the present research project, we have compiled and homogenezed previous gravimetric and magnetic data, and acquired new geophysical data, in particular, gravity data. We have also constructed new geological cross-sections oriented NE-SW from previous and new acquired geological data and characterized the petrophysical properties of the geological units in order to obtain the density and magnetic susceptibility of all different rocks outcropping in the study area. The geological cross-sections together with the petrophysical data will be used in the 2,5 and 3D gravimetric modelling to improve our understanding of the subsurface geology of this part of the Central Pyrenees and of the Parc Natural de l’Alt Pirineu.El Parc Natural de l’Alt Pirineu se encuentra en la zona situada entre el granito de La Maladeta y el granito de Andorra-Mount Louis. Conocer y entender la geología del subsuelo del Parc nos ayudará a saber cómo se produjo el emplazamiento de ambos macizos graníticos, su relación con las rocas plutónicas y volcánicas que afloran en la parte norte y sur del Parc, respectivamente, y si forman parte de un mismo sistema magmático. Para alcanzar estos objetivos, se está realizando una recopilación y homogeneización de datos gravimétricos y magnéticos ya existentes, así como la adquisición de nuevos datos geofísicos, en particular de gravimetría. Además, partiendo de estudios geológicos previos y datos propios, se está llevando a cabo la realización de cortes geológicos de dirección NE-SO y el estudio petrofísico de las unidades geológicas para obtener los valores de densidad y susceptibilidad magnética de todos los tipos de rocas que afloran en el área de estudio. Los cortes geológicos junto con los datos de petrofísica se utilizarán en la modelización gravimétrica 2,5D y 3D para mejorar la interpretación de la geología del subsuelo en este sector de II Jornades de Recerca del Parc Natural de l‘Alt Pirineu 87 los Pirineos Centrales y del Parc Natural de l’Alt Pirineu.Este trabajo se está llevando a cabo en el marco de los subproyectos CGL2017-84901-C2-1 y CGL2017-84901-C2-2-P del Ministerio de Ciencia, Innovación y Universidades. Los desarrollos metodológicos en exploración con técnicas geofísicas se encuentran alineados con el proyecto europeo 3DGeoEU- GeoERA (ERANET Cofund action 731166 [H2020], Project code GeoE.171.005). Los autores agradecen al Parc Natural de l’Alt Pirineu las facilidades prestadas y la organización de las jornadas de investigación para mostrar los trabajos realizados

Geophysical cartography and Geochemical characterisation of the Valencia del Ventoso plutonic complex

The Valencia del Ventoso Massif is a plutonic complex that consists of different intrusive units whose compositions extend from gabbros to monzogranites. The main lithologic units display a zoned distribution whose geometry is distorted by reason of the mingling and dismemberment of the intrusive bodies. The geodinamic characterization based on the geochemical data shows that this plutonic complex corresponds to a high potassium calc-alkaline association, typical of an active continental margin or of a mature island arc environment. The Massif is covered by recent magnetic and radiometric flights, as well as by a regional gravimetric net (IGME 1997, 2001). The aeroradiometric, aeromagnetic and gravimetric maps show a high degree of agreement and they provide good view of the outcrop geometry and subsurface pattern of the main geological units of the complex. This paper shows that airborne geophysical cartography combined with surface geophysical data and field geological research is a very valuable mapping tool of complex plutonic bodie

Imaging the crustal structure of the Central Iberian Zone (Variscan Belt): The ALCUDIA deep seismic reflection transect

ALCUDIA is a 230 km long, vertical incidence deep seismic reflection transect acquired in spring 2007 across the southern Central Iberian Zone (part of the pre-Mesozoic Gondwana paleocontinent) of the Variscan Orogen of Spain. The carefully designed acquisition parameters resulted in a 20 s TWTT deep, 60–90 fold, high-resolution seismic reflection transect. The processed image shows a weakly reflective upper crust (the scarce reflectivity matching structures identified at surface), a thick, highly reflective and laminated lower crust, and a flat Moho located at 10 s TWTT (30 km depth). The transect can be divided into three segments with different structural styles in the lower crust. In the central segment, the lower crust is imaged by regular, horizontal and parallel reflectors, whereas in the northern and southern segments it displays oblique reflectors interpreted as an important thrust (north) and tectonic wedging involving the mantle (south). The ALCUDIA seismic image shows that in an intracontinental orogenic crust, far from the suture zones, the upper and lower crust may react differently to shortening in different sectors, which is taken as evidence for decoupling. The interpreted structures, as deduced from surface geology and the seismic image, show that deformation was distributed homogeneously in the upper crust, whereas it was concentrated in wedge/thrust structures at specific sectors in the lower crust. The seismic image also shows the location of late Variscan faults in spatial association with the lower crustal thickened areas

Doñana. Acta vetebrata. vol 6(2)

Nuevos datos sobre el jarabugo, Phoxinellus hispanicus (Steindachner, 1866) (Pisces,Cyprinidae)Aplicación de técnicas multivariantes al estudio de dos poblaciones de bogas (Chondrostoma polylepis willkomi Stein.) (Pisces: Cyprinidae) en el sur de EspañaCrecimiento de Mauremys caspica leprosa (Schweigger, 1812) (Reptilia, Testudines) en la Reserva Biológica de DoñanaContribución al estudio de la alimentación de Asio otus en el sur de EspañaPrimeros datos sobre la dieta de la nutria Lutra lutra (L.), en aguas continentales de GaliciAnálisis cromosómico, carga de DNA y electroforesis de las liebres españolasEl cariotipo de la lagartija de Valverde (Algyroides marchi)Estudios cariológicos de las especies Algyroides marchi Valverde y Lacerta hispanica vaucheri Boulenger (Reptilia, lacertidae)Sobre la reproducción del eslizón canario (Chalcides viridanus) en la isla de Gran CanariaNididicación invernal de Asio otusCenso de limícolos en las salinas de Bonanza (Cádiz) en agosto de 1978.Observaciones de pito negro (Drycopus martius) en la provincia de SantandeNueva localidad para mirlo collarizo (Turdus torquatus)Observaciones deñ escribano nival (Plectrophenax nivalis) en la provincia de SantanderNidificación de Sturnus vulgaris en la provincia de Santander y anillamiento de pollosObservación de espátulas anilladas en la marisma de Santoña (Santander).Datos de ardeidas y gruiformes para Santander.Intento de cría de Oxyura leucocephala en la laguna de Medina (Cádiz)Presencia de Bufo bufo spinosus Daudin en la dieta de falconiformes y strigiformes en sierra Morena occidentalMartes foina (Erxleben, 1777) y no Martes martes (Linnaeus, 1758) en la isla de Ibiza (Pitiusas, Baleares)Notes on a collection of small mammals from San Vicente de la Barquera in northern SpainObservaciones sobre la reproducción del capibara (Hydrochoerus hydrochaeris) en los llanos de VenezuelaNuevos datos sobre Eumops dabbenei Thomas, 1914 (Chiroptera, molossidaePeer reviewe

Azole and amphotericin B MIC values against aspergillus fumigatus: High agreement between spectrophotometric and visual readings using the EUCAST EDef 9.3.2 procedure

The EUCAST EDef 9.3.2 procedure recommends visual readings of azole and amphotericin B MICs against Aspergillus spp. Visual determination of MICs may be challenging. In this work, we aim to obtain and compare visual and spectrophotometric MIC readings of azoles and amphotericin B against Aspergillus fumigatus sensu lato isolates. A total of 847 A. fumigatus sensu lato isolates (A. fumigatus sensu stricto [n = 828] and cryptic species [n = 19]) were tested against amphotericin B, itraconazole, voriconazole, posaconazole, and isavuconazole using the EUCAST EDef 9.3.2 procedure. Isolates were classified as susceptible or resistant/non-wild type according to the 2020 updated breakpoints. The area of technical uncertainty for the azoles was defined in the updated breakpoints. Visual and spectrophotometric (fungal growth reduction of >95% compared to the control, read at 540 nm) MICs were compared. Essential (+1 2-fold dilution) and categorical agreements were calculated. Overall, high essential (97.1%) and categorical (99.6%) agreements were found. We obtained 100% categorical agreements for amphotericin B, itraconazole, and posaconazole, and consequently, no errors were found. Categorical agreements were 98.7 and 99.3% for voriconazole and isavuconazole, respectively. Most of the misclassifications for voriconazole and isavuconazole were found to be associated with MIC results falling either in the area of technical uncertainty or within one 2-fold dilution above the breakpoint. The resistance rate was slightly lower when the MICs were obtained by spectrophotometric readings. However, all relevant cyp51A mutants were correctly classified as resistant. Spectrophotometric determination of azole and amphotericin B MICs against A. fumigatus sensu lato isolates may be a convenient alternative to visual endpoint readings