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Sánchez Martínez, Sonia ; Arenas Martín, Ricardo ; Díaz García, Florentino ; Martínez Catalán, José Ramón ; Gómez Barreiro, Juan ; Pearce, Julian A. | Geological Society of America | 2007The Careón ophiolite (Galicia, NW Iberian Massif) shows lithological and geochemical features suggestive of an origin in a suprasubduction zone setting. As with other Devonian ophiolites in the European Variscan belt, it was generated within a c[...]texto impreso
Gómez Ortiz, D. ; Agarwal, B.N.P. ; Tejero López, Rosa ; Ruiz Pérez, Javier | Geological Society of America | 2011Through two-dimensional fi ltering and spectral analysis of gravity data, we infer the density structure of the Iberia Peninsula’s lithosphere (western Europe). The gravity anomaly map of the Iberian Peninsula displays long-wavelength anomaly mi[...]texto impreso
Villaseca González, Carlos ; Belousova, Elena ; Barfod, Dan N. ; González Jiménez, José María | Geological Society of America | 2019-04-01We report the first attempt to date metasomatic events in peridotite xenoliths from the Subcontinental Lithospheric Mantle (SCLM) beneath the Cenozoic Calatrava volcanic field of central Spain. The most metasomatized xenoliths of the El Aprisco [...]texto impreso
Luque del Villar, Francisco Javier ; Ortega Menor, Lorena ; Barrenechea, José F. ; Millward, David ; Beyssac, Olivier ; Huizenga, Jan-Marten | Geological Society of America | 2009Recognized large occurrences of fl uid-deposited graphite displaying high crystallinity were previously restricted to high-temperature environments (mainly granulite facies terranes). However, in the extensively mined Borrowdale deposit (UK), th[...]texto impreso
Rapela, C. W. ; Pankhurst, Robert J. ; Casquet, César ; Baldo, Edgardo G. | Geological Society of America | 1998From a detailed study of a 500 km transect in the Sierras Pampeanas, central-west Argentina, two pre-Silurian tectono-magmatic episodes are recognized and defined, each culminating n micro-continental collisions against the proto-Andean margin o[...]texto impreso
Gutiérrez-Alonso, Gabriel ; Fernández Suárez, Javier ; López Carmona, Alicia ; Gärtner, Andreas | Geological Society of America | 2018-02-09In this study we report laser ablation–inductively coupled plasma–mass spectrometer U-Pb ages of granitoids from the so-called early granodiorites of the northwest Iberian Variscan belt. The U-Pb results attest to significant magmatic activity i[...]texto impreso
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We analyzed modern fluvial sands in the Iberian Range in order to obtain an accurate description of the different typologies of carbonate grains and to interpret their origin. Head streams of the Iberian Range mainly receive carbonate sediments [...]texto impreso
Casquet, César ; Baldo, Edgardo G. ; Pankhurst, R.J. ; Rapela, Carlos W. ; Galindo Francisco, Mª del Carmen ; Fanning, C.M. ; Saavedra, Julio | Geological Society of America | 2001New data suggest that the eastern margin of the Argentine Precordillera terrane comprises Grenvillian basement and a sedimentary cover derived from it that were together affected by Middle Ordovician deformation and metamorphism during accretion[...]texto impreso
Hooke, Roger Leb. ; Martín Duque, José Francisco ; Pedraza Gilsanz, Javier de | Geological Society of America | 2012In recent decades, changes that human activities have wrought in Earth’s life support system have worried many people. The human population has doubled in the past 40 years and is projected to increase by the same amount again in the next 40. Th[...]texto impreso
Murphy, J. Brendam ; Fernández Suárez, Javier ; Jeffries, Teresa E. | Geological Society of America | 2004The Silurian–Lower Devonian Arisaig Group, in the Avalon terrane of Nova Scotia, consists of a thick (~1900 m) sequence of unmetamorphosed fossiliferous siliciclastic strata deposited during terrane accretionary events in the Appalachian-Caledon[...]texto impreso
Alasino, P.H ; Casquet, César ; Pankhurst, R.J. ; Rapela, C.W. ; Dahlquist, J.A ; Galindo Francisco, María del Carmen ; Larrovere, M.A. ; Recio, C. ; Paterson, S.R. ; Colombo, F. ; Baldo, E.G. | Geological Society of America | 2016-04We studied the petrogenesis of mafic igneous rocks in the Famatinian arc in the western Sierra Famatina (NW Argentina), an Early Ordovician middle-crustal section in the proto-Andean margin of Gondwana. Mafic rock types consist of amphibolite, m[...]texto impreso
Alasino, Pablo H. ; Ardill, K. ; Stanback, J. ; Paterson, S. R. ; Galindo Francisco, Mª del Carmen ; Leopold, M. | Geological Society of America | 2019The southwestern margin of the Late Cretaceous Sonora Pass Intrusive Suite, northern Sierra Nevada, California (USA), preserves a densely populated zone of magmatic structures that record dynamic magmatic layer formation and deformation (faultin[...]texto impreso
Compositions of modern first-cycle sands derived from granitic and metamorphic terrains in the Spanish Central System have been analyzed in order to evaluate the contributions of different bedrock types. The results of this work indicate that sa[...]texto impreso
Piña García, Rubén ; Romeo Briones, Ignacio ; Ortega Menor, Lorena ; Lunar Hernández, Rosario ; Capote del Villar, Ramón ; Gervilla, Fernando ; Tejero López, Rosa ; Quesada Ochoa, Cecilio | Geological Society of America | 2010-05A model is proposed for the origin and emplacement of the ca. 341 Ma Aguablanca magmatic Ni-Cu-(platinum group element [PGE]) sulfi de deposit (SW Iberia) integrating petrological, geochemical, structural, and geophysical data. The Aguablanca de[...]
