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Resultats globals: 16 registres trobats en 0.02 segons.
Articles, 15 registres trobats
Documents de recerca, 1 registres trobats
Articles 15 registres trobats  1 - 10següent  anar al registre:
1.
11 p, 439.3 KB A zoll counterexample to a geodesic length conjecture / Balacheff, Florent Nicolas (University of Geneva. Department of Mathematics) ; Croke, Christopher (University of Pennsylvania. Department of Mathematics) ; Katz, Mikhail G. (Bar Ilan University. Department of Mathematics)
We construct a counterexample to a conjectured inequality L ≤ 2D, relating the diameter D and the least length L of a nontrivial closed geodesic, for a Riemannian metric on the 2-sphere. The construction relies on Guillemin's theorem concerning the existence of Zoll surfaces integrating an arbitrary infinitesimal odd deformation of the round metric. [...]
2009 - 10.1007/s00039-009-0708-9
Geometric and Functional Analysis, Vol. 19, Issue 1 (May 2009) , p. 1-10  
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2.
30 p, 20.3 MB Recumbent folding in the Upper Cretaceous Eaux-Chaudes massif : a Helvetic-type nappe in the Pyrenees? / Caldera, Norbert (Universitat Autònoma de Barcelona. Departament de Geologia) ; Teixell Cácharo, Antonio (Universitat Autònoma de Barcelona. Departament de Geologia) ; Griera Artigas, Albert (Universitat Autònoma de Barcelona. Departament de Geologia) ; Labaume, Pierre (Université de Montpellier. Géosciences Montpellier) ; Lahfid, Abdeltif (Bureau de Recherches Géologiques et Minières)
We describe a singular structure in Upper Cretaceous rocks of the Eaux-Chaudes massif of the western Pyrenees, consisting of a kilometre-scale fold nappe with a sheared overturned limb. High ductile strain attests a deformation style rarely reported for the alpine Pyrenees, and peak temperature in Upper Cretaceous carbonates is estimated by Raman spectroscopy of carbonaceous material palaeothermometry in the lower greenschist facies (>300°C). [...]
2021 - 10.1111/ter.12517
Terra Nova, Published onlince 2021  
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3.
11 p, 2.2 MB Deformation-promoted defects and retrograde chloritization of biotite in slates from a shear zone, Southern Iberian Massif, SE Spain / Jiménez-Millán, Juan (Universidad de Jaén. Departamento de Geología) ; Vázquez, Mercedes (Universidade de Aveiro. Departamento de Geociencias) ; Velilla, Nicolás (Universidad de Granada. Departamento de Mineralogía y Petrología)
Naturally deformed biotite in contact-metamorphosed slates affected by a shear zone of the Southern Iberian Massif near Jaén (SE Spain) were studied by X-ray diffraction, optical microscopy, scanning electron microscopy, electron probe microanalysis and high-resolution transmission and analytical electron microscopy. [...]
2007 - 10.1346/CCMN.2007.0550305
Clays and Clay Minerals, Vol. 55, Núm. 3 (2007) , p. 284-294  
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4.
18 p, 5.2 MB Factors influencing the formation and characteristics of halloysites or kaolinites in granitic and tuffaceous saprolites in Hong Kong / Churchman, Gordon Jock (University of Adelaide. School of Earth and Environmental Sciences) ; Pontifex, Ian Russel (Pontifex and Associates) ; McClure, Stuart Gerrand (University of Adelaide. School of Earth and Environmental Sciences)
The occurrence of halloysite and/or kaolinitein clay-rich, vein-likezone s in saprolites in Hong Kong has provided the opportunity to examine the conditions determining the formation of onekaolin mineral or the other and also the nature of their particles. [...]
2010 - 10.1346/CCMN.2010.0580207
Clays and Clay Minerals, Vol. 58, Núm. 2 (2010) , p. 220-237  
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5.
16 p, 3.7 MB Stress-induced alteration of sudoite : Structural and chemical modifications / Cruz, María Dolores R. (Facultad de Ciencias. Campus de Teatinos. Málaga) ; Ruiz, María Dolores R. (Facultad de Ciencias. Campus de Teatinos. Málaga) ; de Galdeano, Carlos Sanz (Instituto Andaluz de Ciencias de la Tierra)
The purpose of this study was to investigate the structural and chemical modifications of phyllosilicates that occur under natural conditions, using the progressive deformation of chlorite (sudoite) present in quartz-rich veins from the Internal Zone of the Rif range (Morocco) as the model system. [...]
2010 - 10.1346/CCMN.2010.0580102
Clays and Clay Minerals, Vol. 58, Núm. 1 (2010) , p. 21-36  
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6.
20 p, 898.1 KB Giant reversible nanoscale piezoresistance at room temperature in Sr₂IrO₄ thin films / Domingo Marimon, Neus (Institut Català de Nanociència i Nanotecnologia) ; López-Mir, Laura (Institut Català de Nanociència i Nanotecnologia) ; Paradinas Aranjuelo, Marcos (Institut de Ciència de Materials de Barcelona) ; Holy, Vaclav (Charles University. Department of Condensed Matter Physics) ; Železný, Jakuv (Institute of Physics ASCR) ; Yi, Di (University of California. Department of Materials Science and Engineering) ; Suresha, Siriyara J. (Lawrence Berkeley National Laboratory. Materials Sciences Division) ; Liu, Jian (University of California. Department of Physics) ; Rayan Serrao, Claudy (University of California. Department of Materials Science and Engineering) ; Ramesh, Ramamoorthy (University of California. Department of Physics) ; Ocal García, Carmen (Institut de Ciència de Materials de Barcelona) ; Martí Rovirosa, Xavier (Institut Català de Nanociència i Nanotecnologia) ; Catalan, Gustau (Institut Català de Nanociència i Nanotecnologia)
Layered iridates have been the subject of intense scrutiny on account of their unusually strong spin-orbit coupling, which opens up a narrow bandgap in a material that would otherwise be a metal. This insulating state is very sensitive to external perturbations. [...]
2015 - 10.1039/c4nr06954d
Nanoscale, Vol. 7, Issue 8 (February 2015) , p. 3453-3459  
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7.
17 p, 7.4 MB Deformation pattern around the Conejera fault blocks (Asturian Basin, North Iberian Margin) / Martínez Granado, Pablo (Universitat de Barcelona. Departament de Dinàmica de la Terra i de l'Oceà) ; Tavani, Stefano (Università degli Studi di Napoli Federico II. Dipartimento di Scienze della Terra, dell'Ambiente e delle Risorse) ; Carrera, N. (Universitat de Barcelona. Departament de Ciències de la Terra i de l'Oceà) ; Muñoz, Josep Antón (Universitat de Barcelona. Departament de Dinàmica de la Terra i de l'Oceà)
The Asturian Basin is located on the coastline of the North Iberian Margin. This basin is dissected by long-lived E-, NE- and NW-striking faults that delineate a series of extensional fault blocks that became shortened during the Upper Cretaceous to Cenozoic Alpine convergence. [...]
2018 - 10.1344/GeologicaActa2018.16.4.2
Geologica acta, Vol. 16 Núm. 4 (December 2018) , p. 357-373 (Articles)  
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8.
20 p, 6.4 MB Crystal preferred orientation of olivine in mantle xenoliths from Catalonia (NE Spain) / Fernández Roig, Mercé (Universitat Autònoma de Barcelona. Departament de Geologia) ; Galán García, Gumer (Universitat Autònoma de Barcelona. Departament de Geologia) ; Mariani, E. (University of Liverpool. School of Environmental Sciences)
Mantle xenoliths in Neogene-Quaternary alkaline volcanic rocks from the Catalan Volcanic Zone indicate that ≪anhydrous≫ spinel lherzolites, harzburgites and much subordinate olivine websterites form the lithospheric mantle of NE Iberian Peninsula. [...]
Los xenolitos mantelitos en lavas alcalinas neógeno-cuaternarias de la Zona Volcánica de Cataluña indican que lherzolitas y harzburgitas ≪anhidras≫ y con espinela son las rocas predominantes en el manto litosférico del NE de la Península Ibérica, con presencia también subordinada de websteritas olivínicas. [...]
2016 - 10.17811/tdg.36.2016.119-138
Trabajos de Geología, Núm. 36 (2016) , p. 119-138  
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9.
18 p, 3.8 MB Rasgos sedimentarios indicadores de inestabilidad causada por actividad tectónica sismogenética : las cuencas neógenas de las Minas de Hellín y Cenajo (Prebético externo, SE de España) / Calvo Sorando, José Pedro (Universidad Complutense de Madrid. Departamento de Petrología y Geoquímica) ; Rodríguez-Pascua, Miguel A. (Instituto Geológico y Minero de España) ; Gómez-Gras, David (Universitat Autònoma de Barcelona. Departament de Geologia)
Resum.
2014
Revista de la Sociedad Geológica de España, Vol. 27, Num. 1 (2014) , p. 205-221  
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10.
17 p, 6.4 MB Use of PSInSAR data to map highly compressible soil layers / Del Ventisette, C. (Università di Firenze. Dipartimento di Scienze della Terra) ; Solari, L. A (Università di Firenze. Dipartimento di Scienze della Terra) ; Raspini, F. (Università di Firenze. Dipartimento di Scienze della Terra) ; Ciampalini, A. (Università di Firenze. Dipartimento di Scienze della Terra) ; Di Traglia, F. (Università di Firenze. Dipartimento di Scienze della Terra) ; Moscatelli, M. (CNR-IGAG (Roma, Itàlia). Institute of Environmental Geology and Geoengineering) ; Pagliaroli, A. (CNR-IGAG (Roma, Itàlia). Institute of Environmental Geology and Geoengineering) ; Moretti, S. (Università di Firenze. Dipartimento di Scienze della Terra)
A new approach to the use of Persistent Scatterers (PS) Interferometry data in the reconstruction of the extension of compressible geological bodies is presented. The methodology was applied in the test area of the Tiber River delta (Italy), characterized by the presence of two large marshy zones, known as the Maccarese and Ostia Antica ponds. [...]
2015 - 10.1344/GeologicaActa2015.13.4.4
Geologica acta, Vol. 13 Núm. 4 (December 2015) , p. 309-323 (Articles)  
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Articles : 15 registres trobats   1 - 10següent  anar al registre:
Documents de recerca 1 registres trobats  
1.
25.8 MB Ductile deformation of the Pyrenean hinterland during the Alpine collision : The case of the proximal Iberian margin in the Eaux-Chaudes massif (west-central Pyrenees) / Caldera, Norbert ; Griera i Artigas, Albert, dir. ; Teixell Cácharo, Antonio, dir.
La deformació Alpina al cor de la serralada dels Pirineus és poc coneguda degut a la forta erosió de les roques post Paleozoiques resultant de l'extensa exhumació. Les calcàries del Cretaci superior del massís d'Eaux-Chaudes, envoltades de roques Paleozoiques a la part més interna del Pirineu centre-occidental, presenten evidències de deformació dúctil complexa i estructures de gran escala, amb un estil estructural que no havia estat descrit abans per a la col·lisió Alpina en aquesta serralada. [...]
La deformación Alpina en el corazón de los Pirineos es poco conocida debido a la fuerte erosión de las rocas post Paleozoicas resultante de la extensa exhumación. Las calizas del Cretácico superior del macizo de Eaux-Chaudes, rodeadas de rocas Paleozoicas en la parte más interna del Pirineo centro-occidental, presentan evidencias de deformación dúctil compleja y estructuras de gran escala, con un estilo estructural que no había estado descrito antes para la colisión Alpina en esta cadena montañosa. [...]
Alpine deformation in the hinterland of the Pyrenean belt is poorly constrained due to the strong erosion of the post-Paleozoic rocks in the topographic axis of the Pyrenees. The upper Cretaceous limestones of the Eaux-Chaudes massif, enclosed by Paleozoic rocks in the interior of the west-central Pyrenees, show evidence of complex ductile deformation and a large-scale structural style not reported hitherto for the Alpine collisional stage. [...]
2022  
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