Contribución a la correlación y síntesis de los granitos gallegos

[Resumen] La correlación y síntesis de los granitos gallegos, sigue presentando hoy aspectos conflictivos. La realización de la síntesis geológica 1:200.000 por parte dellGME yen concreto la de la hoja n° 7 (Santiago de Compostela), área abarcada por el presente trabajo, ha vuelto a plantear ésta problemática. La importante calidad de datos procedentes tanto de estudios anteriores, como de la realización del proyecto MAGNA, crea una base cuyo desarrollo nos permite avanzar en el conocimiento de éstos granitos. Este trabajo corresponde a la primera parte de otro ú otros posteriores y en él se marcan fundamentalmente los problemas que se plantean hoy en la correlación y síntesis de los granitos en el área observada, las líneas directrices que se están siguiendo en la elaboración e interpretación de los datos antes mencionados y se adelantan unos primeros resultados, fruto de los trabajos de campo ya realizado

El complejo de Órdenes: subdivisión, descripción y discusión sobre su origen.

[Resumen] El Complejo de Ordenes, el mayor de los macizos alóctonos con rocas máficas y ultramAficas de Galicia y el N de Portugal, se ha subdividido en cinco unidades en base, fundamentalmente, a las asociaciones litológicas: U. de Santiago, U. de Villa de Cruces, U. De la Sierra del Careón-Bazar, U. de SobradoMellid y U. de Betanzos-Arzúa. Todas ellas están separadas entre si por cabalgamientos y superpuestas tectónicamente. Para cada unidad, se realiza una descripción petrológica y se analizan las relaciones de las diferentes rocas entre si. ,Se efectúa, además, una revisión de los datos geoquimicos disponibles y, finalmente, se discute el origen probable de las distintas unidades[Abstract] The Ordenes Complex, the biggest OI the allochthonous massifs with mafic and ultramafic rocks in Galicia and northern Portugal, has been divided into five units according to the lithological associations: Santiago Unit, Villa de Cruces Unít, Sierra del Care6n-Bazar Unit, Sobrado-Mellid Unít and BetanzoS-Arzúa Unít. They are separated from each other by thrust faults and tectonically stacked. For each OI the units, a petrological description is given, explaining the relationships between the different rock types. Moreover, the geochemical data available are reviewed and the probable origin of the units is discusse

Evolución petrológico geoquímica de los granitoides hercínicos del NO gallego

[Resumen] Se estudia el conjunto de rocas graníticas hercínicas del sector noroeste de Galicia, desde el punto de vista petrológico y geoquímico. Por características tect6nicas y mineral6gicas se han distinguido cuatro grupos de granitoides: Granotáides precoces, granitoides inhomogneos,/granitos de dos micas pre-fase 3, y granitos postcinemáticos. Todos los grupos, a excepci6n de los granitoides precoces, tienen una tendencia geoquímica más ácida y evolucionada que la media total de los granitoides gallegos. Los contenidos en Li,Rb,Ba,Sr, demuestran igualmente un alto grado de diferenciación. L1 y Rb por un lado, y Ba y Sr. por otro, se comportan de manera análoga en todos los grupos.[Abstract] This paper deals with the petrological and geochémical aspects of Hercynian granitic rocks in the northwestern part of Galicia. Based on minerological and structural criteria four granitoid groups are distinguished: Early-Hercynian granitoids, " inhomogeneus granitoids " , an'older group of two-micas granite (prior to the third Hercynian deformation) and postcinematic granites. Geochemically al1 the granitic rocks, with the exception of the EarlyHercynian granitoids, are more acid than the average value of all Galician granitoids. Also the abundances of Li, Rb, Ba, and Sr demonstrate a high degree of differentiation. The element pairs Li-Rb and Ba-Sr, tend to behave similarly in the granitoid groups

A Revision of the characteristics and clasification of the hercynian granitoids of Northern Galicia and Western Asturias (NW Spain)

[Resumen] Este trabajo resume parte de los resultados obtenidos en el desarrollo del proyecto «Caracterización y correlación petrológica, geoquímica y geocronológica de las rocas graníticas de Galicia (A Coruña-Lugo)>>, realizado por el 1. ~G. M. E. El estudio sistemático de los distintos plutones graníticos de esta región ha puesto de manifiesto que los criterios de clasificación tradicionalmente utilizados en este ámbito geológico, presentan una serie de limitaciones debidas por una parte a la rigidez de los grupos establecidos y por otra, a las características transicionales de algunas unidades plutónicas. Estos hechos permiten suponer que las relaciones entre los «granitoides alcalinos y alumínicos de dos micas» y los «granitoides de tendencia calcoalcalina» no son tan independientes como se ha venido considerando en los modelos preexistentes. En función de la profundidad y etapa de emplazamiento y de las características petrológicas, las distintas unidades se han agrupado en las siguientes familias: - Granitoides sincinemáticos de emplazamiento relativamente profundo. - Granitoides sincinemáticos de emplazamiento somero. - Granitoides postcinemáticos de emplazamiento somero. Asimismo se detectan unidades plutónicas complejas, constituidas por varios granitos, a los cuales les corresponderían génesis diferentes, si se siguiesen los criterios previamente vigentes.[Abstract] This article summarizes part of the results of the project «Petrological, geochemical and geochronological caracterization and correlation of the granitic rocks of Galicia (provinces of A Coruña-Lugo)>>, executed on behalf of the Spanish Institute of Geology and Mining (1. G. M. E.). The Systematic investigation of the different granite plutons of the area evidences that the application of the criteria traditionally used for the classification of the granitic rocks in Galicia meets with serious difficulties. These are due to the rigidity of the established groups on the one hand and the transitional character of a number of plutonic units on the other hand. The study suggests that the relationship among the {<a1caline and aluminous two-mica granites» and the granitoids of the «ca1c-a1caline tendency is less independent than assumed in the hitherto used classification schemes and petrogenetical models. As a function of the depth and time of their emplacement and their petrological features, the different plutonic units are grouped into the following families: - Synkinematic, relatively deep-seated granitoid bodies. - Synkinematic, shallow-level granitoid bodies. - Postkinematic, shallow-level granitoid bodies. Attention is drawn to the occurrence of complex plutonic units whose constituent members would, according to the criteria of the pre-existing classification schemes, be petrogenetically unrelated or poorly related

Metavolcanic rocks from schistose domain of Galicia-Tras-os-Montes: petrography, geochemistry and tectonic environment (Galice, NW. Spain)

[Resumen] Se estudia el vulcanismo intercalado en los grupos litoestratigráficos inferiores que integran el Dominio Esquistoso de Galicia Tras-os-Montes (DEGTM) denominados de muro a techo Santabaía, Nogueira y Paraño. El grupo de LalínForcarei que completa la secuencia no será tratado en este trabajo. La edad de estos grupos debe comprender desde el Precámbrico hasta el Devónico Inf. Los tres grupos tiene un cierto carácter vulcanosedimentario, más marcado en el grupo de Santabaía que en los dos grupos superiores. Se encuentran en ellos diferentes niveles volcánicos y vulcanosedimentarios de espesor y continuidad lateral variables, correspondientes a neises microporfídicos de dos micas y ortoneises biotíticos, además de algún nivel de riolitas y tranquitas presentes hacia la parte alta del grupo de Paraño. Geoquímicamente se caracteriza por ser un vulcanismo ácido de naturaleza calcoalcalina en el que predominan los términos riolíticos y iodacíticos de alto contenido en K, posiblemente originado en la zona externa de un margen continental pasivo existente durante el Ordovícico-Silúrico en el NO. de la Península, en el que tendrían lugar diferentes episodios o etapas de aportes volcánicos alternando con etapas más largas de sedimentación detrítica.[Abstract] The Vulcanism interbedded in the lower litostratigraphic groups of the DEGTM is studied. Those gruoups are known as Santabaia, Nogueira and Paraño from bo~tom to top; The sequence is completed with the Lalín-Forcarei group that is not studied in this paper. The age of the whole sequence is probably, from Precambrian to lower Devonian. The three groups show volcano-sedimentary features which are dominant in the Santabaia group. Several volcanic and volcano-sedimentary levels with different thickness and extension are found; these correspond to two mica microporfidic gneisses and biotitic ortogneisses and seldom ryolites and trachites in the uppermost pan of the Paraño group. Geochemically correspond to acid calcoalcaline vulcanites with ryolites and K rich ryodacites as main types. These rocks are possibily related to an external area of a continental margin which existed during Ordovician-Silurian time in the NW of the Iberian Peninsula. Several volcanic stages would alternate with sedimentation in this geotectonic environment

Electronic localization at mesoscopic length scales: different definitions of localization and contact effects in a heuristic DNA model

In this work we investigate the electronic transport along model DNA molecules using an effective tight-binding approach that includes the backbone on site energies. The localization length and participation number are examined as a function of system size, energy dependence, and the contact coupling between the leads and the DNA molecule. On one hand, the transition from an diffusive regime to a localized regime for short systems is identified, suggesting the necessity of a further length scale revealing the system borders sensibility. On the other hand, we show that the lenght localization and participation number, do not depended of system size and contact coupling in the thermodynamic limit. Finally we discuss possible length dependent origins for the large discrepancies among experimental results for the electronic transport in DNA sample

Estructura, petrología y evolución de Sobrado de los Montes (La Coruña)

[Resumen] La región de Sobrado, que forma parte del Complejo de Ordenes, se caracteriza por la existencia de una antiforma que pliega a dos unidades alóctonas superpuestas. La Unidad Inferior, constituida por rocas ultramáficas, máficas y félsicas, ha sufrido un metamorfismo de alto grado en facies granulita, mientras que la superior, compuesta por grani toides prehercínicos y gabros, intruidos en esquistos micáceos, no ha superado la facies anfibolita en el área que nos ocupa. En la Unidad Inferior se ha establecido una sucesión que consta, de abajo arriba, de rocas ultramáficas, un paquete de espesor constante de eclogitas y pirigarnitas y una alternancia de gneises félsicos y metabasitas heterogéneas. Las metabasitas heterogéneas derivan en su mayoría de gabros, los cuales han sido parcialmente preservados de la deformación y afloran en cuerpos subredondeados de hasta 2 km. de longitud . Se describen las características petrológicas y las relaciones mutuas de las rocas, así como su evolución en el curso de la deformación, que va acompañada frecuentemente por una milonitización intensa.[Abstract] The Sobrado area, which belongs to the Ordenes Complex, is characterized by the presence of an antiform affecting two superposed allochthonous units. The lower one, made up of ultramafic , mafic and felsic rocks, suffered high grade metamorphism in the granulite facies, while the grade of metamorphism in the Upper Unit, composed of prehercynian granitoids and gabbros intruded in micaschists, not reached beyond that of the amphibolite facies in the area under consideration. In the Lower Uni t a succession could be established, which consists, from bottom to top, of ultramafics, a serie of constant width composed of eclogites and pyrigarnites, and an alternation of felsic gneisses with inhomogeneous metabasic rocks. The latter derive mainly from gabbros, which have been partially preserved and which outcrop in subrounded bodies of up to 2 km. length. A description is given of the petrological features of and the mutual relations between the different rock types, as well as a model of their evolution during the deformation they underwent, wich was frequently accompanied by strong milonitizatio

Fungal Planet description sheets : 1383–1435

Novel species of fungi described in this study include those from various countries as follows: Australia, Agaricus albofoetidus, Agaricus aureoelephanti and Agaricus parviumbrus on soil, Fusarium ramsdenii from stem cankers of Araucaria cunninghamii, Keissleriella sporoboli from stem of Sporobolus natalensis, Leptosphaerulina queenslandica and Pestalotiopsis chiaroscuro from leaves of Sporobolus natalensis, Serendipita petricolae as endophyte from roots of Eriochilus petricola, Stagonospora tauntonensis from stem of Sporobolus natalensis, Teratosphaeria carnegiei from leaves of Eucalyptus grandis × E. camaldulensis and Wongia ficherai from roots of Eragrostis curvula. Canada, Lulworthia fundyensis from intertidal wood and Newbrunswickomyces abietophilus (incl. Newbrunswickomyces gen. nov.) on buds of Abies balsamea. Czech Republic, Geosmithia funiculosa from a bark beetle gallery on Ulmus minor and Neoherpotrichiella juglandicola (incl. Neoherpotrichiella gen. nov.) from wood of Juglans regia. France, Aspergillus rouenensis and Neoacrodontium gallica (incl. Neoacrodontium gen. nov.) from bore dust of Xestobium rufovillosum feeding on Quercus wood, Endoradiciella communis (incl. Endoradiciella gen. nov.) endophytic in roots of Microthlaspi perfoliatum and Entoloma simulans on soil. India, Amanita konajensis on soil and Keithomyces indicus from soil. Israel, Microascus rothbergiorum from Stylophora pistillata. Italy, Calonarius ligusticus on soil. Netherlands, Appendopyricularia juncicola (incl. Appendopyricularia gen. nov.), Eriospora juncicola and Tetraploa juncicola on dead culms of Juncus effusus, Gonatophragmium physciae on Physcia caesia and Paracosmospora physciae (incl. Paracosmospora gen. nov.) on Physcia tenella, Myrmecridium phragmitigenum on dead culm of Phragmites australis, Neochalara lolae on stems of Pteridium aquilinum, Niesslia nieuwwulvenica on dead culm of undetermined Poaceae, Nothodevriesia narthecii (incl. Nothodevriesia gen. nov.) on dead leaves of Narthecium ossifragum and Parastenospora pini (incl. Parastenospora gen. nov.) on dead twigs of Pinus sylvestris. Norway, Verticillium bjoernoeyanum from sand grains attached to a piece of driftwood on a sandy beach. Portugal, Collybiopsis cimrmanii on the base of living Quercus ilex and amongst dead leaves of Laurus and herbs. South Africa, Paraproliferophorum hyphaenes (incl. Paraproliferophorum gen. nov.) on living leaves of Hyphaene sp. and Saccothecium widdringtoniae on twigs of Widdringtonia wallichii. Spain, Cortinarius dryosalor on soil, Cyphellophora endoradicis endophytic in roots of Microthlaspi perfoliatum, Geoglossum laurisilvae on soil, Leptographium gemmatum from fluvial sediments, Physalacria auricularioides from a dead twig of Castanea sativa, Terfezia bertae and Tuber davidlopezii in soil. Sweden, Alpova larskersii, Inocybe alpestris and Inocybe boreogodeyi on soil. Thailand, Russula banwatchanensis, Russula purpureoviridis and Russula lilacina on soil. Ukraine, Nectriella adonidis on overwintered stems of Adonis vernalis. USA, Microcyclus jacquiniae from living leaves of Jacquinia keyensis and Penicillium neoherquei from a minute mushroom sporocarp. Morphological and culture characteristics are supported by DNA barcodes

Fungal planet description sheets : 1042-1111

Novel species of fungi described in this study include those from various countries as follows: Antarctica, Cladosporium arenosum from marine sediment sand. Argentina, Kosmimatamyces alatophylus (incl. Kosmimatamyces gen. nov.) from soil. Australia, Aspergillus banksianus, Aspergillus kumbius, Aspergillus luteorubrus, Aspergillus malvicolor and Aspergillus nanangensis from soil, Erysiphe medicaginis from leaves of Medicago polymorpha, Hymenotorrendiella communis on leaf litter of Eucalyptus bicostata, Lactifluus albopicri and Lactifluus austropiperatus on soil, Macalpinomyces collinsiae on Eriachne benthamii, Marasmius vagus on soil, Microdochium dawsoniorum from leaves of Sporobolus natalensis, Neopestalotiopsis nebuloides from leaves of Sporobolus elongatus, Pestalotiopsis etonensis from leaves of Sporobolus jacquemontii, Phytophthora personensis from soil associated with dying Grevillea mccutcheonii. Brazil, Aspergillus oxumiae from soil, Calvatia baixaverdensis on soil, Geastrum calycicoriaceum on leaf litter, Greeneria kielmeyerae on leaf spots of Kielmeyera coriacea. Chile, Phytophthora aysenensis on collar rot and stem of Aristotelia chilensis. Croatia, Mollisia gibbospora on fallen branch of Fagus sylvatica. Czech Republic, Neosetophoma hnaniceana from Buxus sempervirens. Ecuador, Exophiala frigidotolerans from soil. Estonia, Elaphomyces bucholtzii in soil. France, Venturia paralias from leaves of Euphorbia paralias. India, Cortinarius balteatoindicus and Cortinarius ulkhagarhiensis on leaf litter. Indonesia, Hymenotorrendiella indonesiana on Eucalyptus urophylla leaf litter. Italy, Penicillium taurinense from indoor chestnut mill. Malaysia, Hemileucoglossum kelabitense on soil, Satchmopsis pini on dead needles of Pinus tecunumanii. Poland, Lecanicillium praecognitum on insects’ frass. Portugal, Neodevriesia aestuarina from saline water. Republic of Korea, Gongronella namwonensis from freshwater. Russia, Candida pellucida from Exomias pellucidus, Heterocephalacria septentrionalis as endophyte from Cladonia rangiferina, Vishniacozyma phoenicis from dates fruit, Volvariella paludosa from swamp. Slovenia, Mallocybe crassivelata on soil. South Africa, Beltraniella podocarpi, Hamatocanthoscypha podocarpi, Coleophoma podocarpi and Nothoseiridium podocarpi (incl. Nothoseiridium gen. nov.) from leaves of Podocarpus latifolius, Gyrothrix encephalarti from leaves of Encephalartos sp., Paraphyton cutaneum from skin of human patient, Phacidiella alsophilae from leaves of Alsophila capensis, and Satchmopsis metrosideri on leaf litter of Metrosideros excelsa. Spain, Cladophialophora cabanerensis from soil, Cortinarius paezii on soil, Cylindrium magnoliae from leaves of Magnolia grandiflora, Trichophoma cylindrospora (incl. Trichophoma gen. nov.) from plant debris, Tuber alcaracense in calcareus soil, Tuber buendiae in calcareus soil. Thailand, Annulohypoxylon spougei on corticated wood, Poaceascoma filiforme from leaves of unknown Poaceae. UK, Dendrostoma luteum on branch lesions of Castanea sativa, Ypsilina buttingtonensis from heartwood of Quercus sp. Ukraine, Myrmecridium phragmiticola from leaves of Phragmites australis. USA, Absidia pararepens from air, Juncomyces californiensis (incl. Juncomyces gen. nov.) from leaves of Juncus effusus, Montagnula cylindrospora from a human skin sample, Muriphila oklahomaensis (incl. Muriphila gen. nov.) on outside wall of alcohol distillery, Neofabraea eucalyptorum from leaves of Eucalyptus macrandra, Diabolocovidia claustri (incl. Diabolocovidia gen. nov.) from leaves of Serenoa repens, Paecilomyces penicilliformis from air, Pseudopezicula betulae from leaves of leaf spots of Populus tremuloides. Vietnam, Diaporthe durionigena on branches of Durio zibethinus and Roridomyces pseudoirritans on rotten wood. Morphological and culture characteristics are supported by DNA barcodes

Screening for HTLV-1 infection should be expanded in Europe

Human T-cell lymphotropic virus type 1 (HTLV-1) infection is spreading globally at an uncertain speed. Sexual, mother-to-child, and parenteral exposure are the major transmission routes. Neither vaccines nor antivirals have been developed to confront HTLV-1, despite infecting over 10 million people globally and causing life-threatening illnesses in 10% of carriers. It is time to place this long-neglected disease firmly into the 2030 elimination agenda. Current evidence supports once-in-life testing for HTLV-1, as recommended for HIV, hepatitis B and C, along with targeted screening of pregnant women, blood donors, and people who attended clinics for sexually transmitted infections (STIs). Similar targeted screening strategies are already being performed for Chagas disease in some Western countries in persons from Latin America. Given the high risk of rapid-onset HTLV-1-associated myelopathy, universal screening of solid organ donors is warranted. To minimize organ wastage, however, the specificity of HTLV screening tests must be improved. HTLV screening of organ donors in Europe has become mandatory in Spain and the United Kingdom. The advent of HTLV point-of-care kits would facilitate testing. Finally, increasing awareness of HTLV-1 will help those living with HTLV-1 to be tested, clinically monitored, and informed about transmission-preventive measures