Geologica acta

Geologica acta 12 records found  Search took 0.00 seconds. 
1.
2 p, 677.7 KB Foreword : Granites and Related Rocks: a tribute to Guillermo Corretgé / Bea Barredo, Fernando (Universidad de Granada. Departamento de Mineralogía y Petrología) ; Castro Dorado, Antonio (Universidad de Huelva. Departamento de Ciencias de la Tierra) ; Montero, P. (Universidad de Granada. Departamento de Mineralogía y Petrología)
2017
Geologica acta, Vol. 15 Núm. 4 (December 2017) , p. i-ii  
2.
17 p, 1.5 MB Geochemical, isotopic, and zircon (U-Pb, O, Hf isotopes) evidence for the magmatic sources of the volcano-plutonic Ollo de Sapo Formation, Central Iberia / Montero, P. (Universidad de Granada. Departamento de Mineralogía y Petrología) ; Talavera, C. (Curtin University Perth (Austràlia). John de Laeter Centre) ; Bea Barredo, Fernando (Universidad de Granada. Departamento de Mineralogía y Petrología)
The Ollo de Sapo Formation comprises variably metamorphosed felsic peraluminous volcanic rocks and highlevel granites that crop out over some 600km from the Cantabrian coast to central Spain in the northern part of the Central Iberian Zone. [...]
2017 - 10.1344/GeologicaActa2017.15.4.1
Geologica acta, Vol. 15 (December 4) , p. 245-260  
3.
21 p, 5.8 MB Experimental early crystallization of K-feldspar in granitic systems : implications on the origin of magmatic fabrics in granitic rocks / Díaz-Alvarado, J. (Universidad de Atacama. Departamento de Geología)
One of the most outstanding characteristics of some granodioritic to granitic rocks is the presence of K-feldspar megacrysts. For instance, granodiorites and monzogranites of the Spanish Central System batholith present variable amounts of large (up to 10cm in length) euhedral K-feldspar crystals. [...]
2017 - 10.1344/GeologicaActa2017.15.4.2
Geologica acta, Vol. 15 Núm. 4 (2017) , p. 261-281  
4.
29 p, 3.0 MB Petrology and geochronology of the Porriño late-Variscan pluton from NW Iberia : a model for post-tectonic plutons in collisional settings / González Menéndez, Leopoldo (Instituto Geológico y Minero de España) ; Gallastegui Suárez, Gloria María (Instituto Geológico y Minero de España) ; Cuesta Fernández, Andrés (Universidad de Oviedo. Departamento de Geología) ; Montero, P. (Universidad de Granada. Departamento de Mineralogía y Petrología) ; Rubio Ordoñez, Álvaro (Universidad de Oviedo. Departamento de Geología) ; Molina Palma, José Francisco (Universidad de Granada. Departamento de Mineralogía y Petrología) ; Bea Barredo, Fernando (Universidad de Granada. Departamento de Mineralogía y Petrología)
The Variscan orogen of NW Iberia contains abundant syn- and post-tectonic granitoids. The post-tectonic granitoids are metaluminous to slightly peraluminous, I-type granites, monzogranites ± granodiorites ± tonalites. [...]
2017 - 10.1344/GeologicaActa2017.15.4.3
Geologica acta, Vol. 15 Núm. 4 (December 2017) , p. 283-304  
5.
17 p, 2.9 MB Late Cambrian magmatic arc activity in peri-Gondwana : geochemical evidence from metagranitoid rocks of the Basal Allochthonous Units of NW Iberia / Andonaegui Moreno, Pilar (Universidad Complutense de Madrid. Departamento de Petrología y Geoquímica) ; Abati Gómez, Jacobo (Universidad Complutense de Madrid. Departamento de Petrología y Geoquímica) ; Diez Fernández, Rubén (Universidad Complutense de Madrid. Departamento de Geodinámica)
The North African section of the Gondwana margin was the site of voluminous, arc-related magmatism during the Late Neoproterozoic (Avalonian–Cadomian orogen). The lower (and older) metasedimentary sequence that constitutes the Basal Units of the llochthonous Complexes of NW Iberia was deposited in that setting. [...]
2017 - 10.1344/GeologicaActa2017.15.4.4
Geologica acta, Vol. 15 Núm. 4 (December 2017) , p. 305-321  
6.
14 p, 3.3 MB Spinels of Variscan olivine hornblendites related to the Montnegre granitoids revisited (NE Spain) : petrogenetic evidence of mafic magma mixing. / Galán García, Gumer (Universitat Autònoma de Barcelona. Departament de Geologia) ; Enrique, P. (Universitat de Barcelona. Departament de Mineralogia, Petrologia i Geologia aplicada) ; Butjosa Molines, Lidia (Departament de Mineralogia, Petrologia i Geologia aplicada, Facultat de Ciències de la Terra, Universitat de Barcelona) ; Fernández Roig, Mercé (Universitat Autònoma de Barcelona. Departament de Geologia)
Olivine hornblendites (cortlandtites) form part of the Montnegre mafic complex related to late-Variscan I-type granitoids in the Catalan Coastal Ranges. Two generations of spinel are present in these hornblendites: Spl1 forms euhedral crystals included in both olivine and Spl2. [...]
2017 - 10.1344/GeologicaActa2017.15.4.5
Geologica acta, Vol. 15 Núm. 4 (December 2017) , p. 323-336  
7.
24 p, 3.4 MB Phase relations in the Cabeza de Araya cordierite monzogranite, Iberian Massif : implications for the formation of cordierite in a crystal mush. / García-Moreno, Olga (Universidad de Oviedo. Departmento de Geología) ; Corretgé Castañón, Luis Guillermo (Universidad de Oviedo. Departmento de Geología) ; Holtz, F. (Leibniz Universität Hannover. Institut für Mineralogie) ; García-Arias, M. (Universidad de Los Andes. Departmento de Geociencias) ; Rodríguez, C. (Departmento de Ciencias de la Tierra. Facultad de Ciencias Experimentales, Universidad de Huelva)
Experimental investigations and thermodynamic calculations of the phase relations of a cordierite-rich monzogranite from the Cabeza de Araya batholith (Cáceres, Spain) have been performed to understand the formation of cordierite. [...]
2017 - 10.1344/GeologicaActa2017.15.4.6
Geologica acta, Vol. 15 Núm. 4 (December 2017) , p. 337-359  
8.
18 p, 3.2 MB The late-Variscan peraluminous Valdepeñas pluton (southern Central Iberian Zone) / Errandonea, Jon (Universidad del País Vasco. Departamento de Minerología y Petrología) ; Carracedo Sánchez, Manuel (Universidad del País Vasco. Departamento de Minerología y Petrología) ; Sarrionandia, S. (Universidad del País Vasco. Departamento de Geodinámica) ; Santos Zalduegui, José Francisco (Universidad del País Vasco. Departamento de Minerología y Petrología) ; García de Madinabeitia, Sonia (Universidad del País Vasco. Departamento de Minerología y Petrología) ; Gil Ibarguchi, José Ignacio (Universidad del País Vasco. Departamento de Minerología y Petrología)
The Valdepeñas pluton is the easternmost outcrop of the Cáceres-Valdepeñas magmatic alignment (southern Central Iberian Zone). This massif is constituted by a cordierite-bearing porphyritic monzogranite and may be grouped within the so-called "Serie Mixta" granitoids. [...]
2017 - 10.1344/GeologicaActa2017.15.4.7
Geologica acta, Vol. 15 Núm. 4 (December 2017) , p. 361-378  
9.
17 p, 2.4 MB Magnetic susceptibility of Variscan granite-types of the Spanish Central System and the redox state of magma. / Villaseca González, Carlos (Universidad Complutense de Madrid. Departamento de Petrología y Geoquímica) ; Ruíz Martínez, Vicente Carlos (Universidad Complutense de Madrid. Departamento de Física de la Tierra) ; Pérez-Soba Aguilar, Cecilia (Universidad Complutense de Madrid. Departamento de Petrología y Geoquímica)
Magnetic susceptibility (MS) has been measured in Variscan granites from central Spain. They yield values in the order of 15 to 180µSI units for S- and I-type granites, indicating that both types belong to the ilmenite series. [...]
2017 - 10.1344/GeologicaActa2017.15.4.8
Geologica acta, Vol. 15 Núm. 4 (December 2017) , p. 379-394  
10.
14 p, 6.1 MB Zircon and allanite U-Pb ID-TIMS ages of vaugnerites from the Calzadilla pluton, Salamanca (Spain) : dating mantle-derived magmatism and post-magmatic subsolidus overprint. / López-Moro, Francisco Javier (Universidad de Salamanca. Departamento de Geología) ; Romer, R.L. (Deutsches GeoForschungsZentrum (GFZ)) ; López-Plaza, Miguel (Universidad de Salamanca. Departamento de Geología,) ; Gónzalez Sánchez, M. (Instituto de Recursos Naturales y Agrobiología de Salamanca)
Basic to intermediate high-K, high-Mg mantle-derived rocks occur throughout the Iberian Massif and are particularly important in the Tormes Dome, where vaugnerites form several stocks and small plutons. [...]
2017 - 10.1344/GeologicaActa2017.15.4.9
Geologica acta, Vol. 15 Núm. 4 (December 2017) , p. 395-408  
11.
28 p, 7.2 MB Coeval interaction between magmas of contrasting composition (Late Carboniferous-Early Permian Santa Eulália-Monforte massif, Ossa-Morena Zone) : field relationships and geochronological constraints. / Pereira, M. F. (Universidade de Évora. Departamento de Geociências) ; Gama, C. (Universidade de Évora. Departamento de Geociências) ; Rodríguez, Carmen (Universidad de Huelva. Departamento de Ciencias de la Tierra)
The Santa Eulália-Monforte massif is a post-kinematic Late Carboniferous-Early Permian calc-alkaline composite massif (LC-EP) located in the Ossa-Morena Zone (OMZ, Portugal). This paper examines the field relationships between pinkish granites and mafic-intermediate rocks from the external ring of this massif and presents new U-Pb zircon age determinations. [...]
2017 - 10.1344/GeologicaActa2017.15.4.10
Geologica acta, Vol. 15 Núm. 4 (December 2017) , p. 409-428  
12.
14 p, 5.2 MB Late Variscan, Permo-Carboniferous, Al-K plutonism in the South Portuguese Zone : El Crispinejo cordierite-bearing granite / Diéz-Montes, Alejandro (Instituto Geológico y Minero de España) ; Valverde-Vaquero, P. (Instituto Geológico y Minero de España) ; Rey-Moral, C. (Instituto Geológico y Minero de España) ; Sánchez-García, T. (Instituto Geológico y Minero de España)
The El Crispinejo granite forms part of a small, but distinctive late intrusive suite of cordierite-bearing peraluminous granites in the South Portuguese Zone (SPZ). This granite has the best outcrop relationships of the suite. [...]
2017
Geologica acta, Vol. 15 Núm. 4 (December 2017) , p. 429-442  

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