¿Bastan los datos geoquímicos para establecer el origen del circón? Aportaciones de los esquistos cloríticos en las peridotitas de Ronda

This study deals with the scarce chlorite schists scattered through the Ronda peridotites (Betic Cordilleras, Spain) related to the intrusion of granite dykes. Chlorite schists field data and the petrography, geochemistry and geothermometry of the extracted zircon crystals, point to late magmatic melts for the zircon origin. Moreover, LA-ICPMS analyses reveal that trace and rare earth elements alone could not be indicative for the magmatic or hydrothermal origin of zircon. Therefore, the combination of that information with zircon morphology, melt inclusions, geothermometry, and structural data, when possible, is crucial in the correct zircon origin identificationEste trabajo se centra en los escasos esquistos cloríticos, asociados a la intrusión de diques graníticos, que se encuentran en las peridotitas de Ronda (Cordilleras Béticas, España). A partir de los datos de campo de los esquistos y de la petrografía, geoquímica y geotermometría de circones extraídos, se concluye que su origen está ligado a fluidos magmáticos tardíos. Además, la información obtenida mediante LA-ICP-MS confirma que los elementos trazas y las tierras raras por sí solos no son determinantes acerca del origen magmático o hidrotermal del circón. Por tanto, la combinación de dicha información con la morfología de los circones, inclusiones de fundidos, geotermometría y el estudio estructural, en el caso de ser posible, es crucial para la correcta identificación del origen del circó

Chemical characterization of igneous sphene and application of the Zr-in-sphene thermometer to tardimagmatic processes

This preliminary work illustrates the chemical composition of sphene from Variscan tonalites with sphene-centered ocellar texture (Ribadelago pluton, NW Iberian Massif). The ocellar texture is linked with the percolation of a tardimagmatic melt, with trondhjemitic affinities, through an hyperdense crystal mush. Chemical zoning in sphene, revealed by BSE imaging, shows a heterogeneous distribution of heavy trace elements (Nb, Y, Ce and Zr) that depicts concentric, oscillatory, sector and patchy patterns. Application of the Zr-in-sphene thermometer yields a temperature range of 746 to 778 ºC for the crystallization of sphene in the tardimagmatic melt. It also constitutes a minimum temperature estimation for biotite partial destabilization in this litholog

Repotenciación de tres maletas didácticas con mini plc logo + hmi, para realizar aplicaciones con motores trifásicos de baja potencia.

El proyecto de titulación “repotenciación de tres maletas didáticas, con mini plc logo + hmi, para realizar aplicaciones con motores trifásicos de baja potencia”, se basa en la investigación, diseño e implementación de tres módulos didácticos para generar prácticas de sistemas de controles industriales, complementando los conocimientos teóricos adquiridos con la experiencia obtenida al trabajar con estos equipos, el objetivo es lograr que los estudiantes se familiaricen con el uso de variadores sinamics g110; lograr su funcionamiento en conjunto con el mini plc logo 230 rce, aprovechando la capacidad de comunicación con el puerto ethernet que posee.The titulation project "repotenciation of three didactic suitcase, with logo + hmi mini plc, to perform applications with low powered three-phase motors", is based on the research, design and implementation of three industrial didactic industrial modules , complementing the theoretical knowledge acquired with the experience obtained by working with these equipment, the objective is to ensure that students are familiarize with the use of sinamics g110 variators; achieve its operation in conjunction with the logo 230 rce mini plc, taking advantage of the communication capacity with the ethernet port it has

Peri-Gondwanan Provenance and Geodynamic Evolution of The Guadaiza Nappe (Alpujarride Complex, Betic Cordilleras, Spain): Insights on The Paleotethyan Paleogeography

Based on the LA-ICP-MS U-Pb zircon ages of four metamorphic samples, we discuss the geochronology and provenance of the Guadaiza nappe, an allochthonous unit that underlies the Ronda peridotites (Betic Cordilleras, Spain). The Guadaiza nappe is composed of Triassic marbles overlying a metapelitic sequence with schists and migmatites. Zircons from a quartzite interlayered with the marbles yield a maximum depositional age of ca. 289 Ma that supports the Triassic age. The idiomorphic morphology of these Paleozoic zircon crystals and the lack of late-Variscan metamorphism (ca. 300 Ma) supports a proximal source area, and suggests that the marbles were discordantly deposited over the metapelitic sequence, along the northern margin of the Alboran microplate. The zircon patterns from the metapelitic sequence mainly yield Paleoproterozoic (ca. 1.6–2.5 Ga), Tonian–Stenian (ca. 1000 Ma), Ediacaran–Cryogenian (ca. 600 Ma) and Paleozoic (ca. 500 Ma) age clusters. These results suggest provenance from areas within the triangle bound by the West African Craton, the Metasaharan Craton and the Hun Superterrane during the Paleotethys opening (Silurian–Devonian). A Silurian–Carboniferous deposition age for the schist protoliths is constrained by the youngest detrital zircon population (ca. 443 Ma) and the Variscan age of their migmatization by an additional peak of around 299 Ma in the migmatites.This research was funded by Ministerio de Economía, Industria y Competitividad/Agencia Estatal de Investigación/Fondo Europeo de Desarrollo Regional, European Union, grant number CGL2017-82976-P and Grupos de Investigación, University of the Basque Country, grant number GIU20/017

Provenance Analysis of the Ojén Nappe and Its Implication for the Geodynamic History (Alpujárride Complex, Betic Cordilleras, Spain)

The Ojén nappe, an allochthonous unit that underlies the Ronda peridotites (Betic Cordilleras), is composed of Triassic marbles overlying a metapelitic sequence. In order to carry out an LA-ICP-MS U-Pb age determination and provenance analysis, detrital zircon grains from two quartzites interlayered within marbles and metapelites were extracted. The obtained results yield the youngest zircon population of 254 ± 3 Ma (Late Permian) with a mean Th/U ratio of 0.34 that supports both the Permian–Triassic age of the marble member and the felsic magma nature for zircon-bearing protoliths. The Permian zircons exhibit tight age peaks in three main populations of 292 ± 2 Ma, 278 ± 3 Ma, and 254 ± 3 Ma, in agreement with the main age populations reported from rhyolites and shallow crustal basaltic–andesite subalkaline rocks emplaced in transtensional Permian basins of the Variscan Orogen during the break-up of Pangea. Moreover, the analyzed detrital zircon grains yield age distributions with clear Tonian–Stenian (ca. 950–975 Ma), Ediacaran–Cryogenian (ca. 560–615 Ma), Ordovician (ca. 460–465 Ma), and Cisuralian peaks (ca. 280–290 Ma) and smoothed Mesoproterozoic peaks that point to a weak and residual Cadomian peri-Gondwanan terrane inheritance. The identified Middle Ordovician detrital zircon populations (460–465 Ma) strengthen the hypothesis that the Alborán domain would be located along the southern passive margin of the European Hunic superterrane.This research was funded by Ministerio de Economía, Industria y Competitividad/Agencia Estatal de Investigación/Fondo Europeo de Desarrollo Regional, European Union (grant number CGL2017-82976-P) and Grupos de Investigación, University of the Basque Country (grant number GIU20/017)

Challenges for the Adoption of Model-Driven Web Engineering Approaches in Industry

Model-driven web engineering approaches have become an attractive research and technology solution for Web application development. However, after 20 years of development, they have attracted little attention from the Industry due to the mismatch between technical versus research requirements. In this joint work between academia and industry, the authors present the current problems of using these approaches in scale and provide guidelines to convert them into viable industry solutions.Ministerio de ciencia e Innovación TIN2016-76956-C3-2-RMinisterio de Economía y Competitividad TIN2015-71938-RED

Mantle diapirism induced by delamination in the Ronda peridotites (Betic Cordillera)

The contribution of asthenosphere diapirs to the exhumation of Orogenic Lherzolites from the mantle to the Earth’s surface stands as a major issue in the evolution of orogenic belts. Structural and textural data from the Carratraca massifs of the Ronda peridotites, in the Betic Cordillera of southern Spain, provide evidence for a narrow mantle diapir that was formed in Early Miocene times. Its development spent 1.1 Ma at an ascent rate of less than 4.5 mm/y. When set in its geological and petrological context, this diapir documents the injection of hot asthenosphere into older and cooler lithospheric mantle, in response to the delamination of the thickened lithosphere keel formed during the Mesozoic and Cenozoic convergence of the African and Iberian plates from Cretaceous times onward

Geochemistry and geodynamic frame of the Ojen Nappe´s eclogites and amphibolites, Alpujarride Complex, Betic Cordilleras

Amphibolite bodies with eclogite relics are found interlayered between the Ojen nappe´s crustal rocks, below the Ronda peridotites of the Betic Cordilleras (southern Spain). We present a geochemical study of such amphibolites and retrogressed eclogites, from which it is possible to deduce a gabbroic origin for their protoliths. We propose that their intrusion in the continental crust took place in a rift setting of Jurassic to Lower Cretaceous age. The recognition of this rifting event in the Alpujarride Complex places an additional constraint for Mesozoic reconstructions of the Western Mediterranea

Structural zoning in a serpentinite-bearing shear zone (Peña Parda Fault, Ronda peridotites)

We study deformation structures in a serpentinite-bearing normal shear zone in the Ronda peridotites, southern Spain. The fault zone displays a structural zoning composed by four domains showing similar strain gradients. Deformation is partitioned into distributed deformation expressed by foliated serpentinites and S-C structures and localized deformation expressed by R and P shear planes at lower and upper portions, respectively, of each domain. Such a structural zoning suggests that stable shear creep alternates with intermittent seismogenic events during the fault activit

Synthesis and Characterization of Amide Stationary Phases for the Determination of Sulfonamides by Sequential Injection Chromatography

Producción CientíficaThe synthesis of amide (butyl, cyclohexyl, and phenyl) modified silica and the use as stationary phases in sequential injection chromatogra-phy are described. The system was tested on the isocratic separation of seven sulfonamides (sulfachloropyridazine, sulfadimethoxine, sulfame-thazine, sulfamethoxazole, sulfamethoxypyridazine, sulfaquinoxaline, and sulfathiazole) using each stationary phase with mobile phases composed of acetonitrile/water at a flow rate of 0.45 mL min−1. A mixed mode retention mechanism of sulfonamides in the stationary phases was obtained, including dipole-dipole, π-π, and hydrogen bonding interactions. The most appropriate phase for the separation of sulfonamides was phenylamide. The chromatographic behavior was confirmed using density functional theory of the interaction between sulfamethoxazole and the stationary phases.Junta de Castilla y León Proyecto VA171U1