2021-03-25
18:50 |
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20 p, 4.0 MB |
Spinel group minerals in metamorphosed ultramafic rocks from Río de Las Tunas belt, Central Andes, Argentina
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Gargiulo, M. F. (Universidad Nacional del Sur (Bahía Blanca, Argentina)) ;
Bjerg, E. A. (Universidad Nacional del Sur (Bahía Blanca, Argentina)) ;
Mogessie, A. (Karl-Franzens Universität Graz. Institut für Erdwissenschaften, Bereich Mineralogie und Petrologie)
In the Río de Las Tunas belt, Central Andes of Argentina, spinel group minerals occur in metaperidotites and in reaction zones developed at the boundary between metaperidotite bodies and their country-rocks. [...]
2013
Geologica acta, Vol. 11, Núm. 2 (Juny 2013) , p. 133-148
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2020-12-22
06:06 |
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2020-12-22
06:06 |
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2020-12-22
06:06 |
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2020-12-22
06:06 |
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14 p, 3.2 MB |
Time lag between metamorphism and crystallization of anatectic granites (Córdoba, Argentina)
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D'Eramo, F.J. (Universidad Nacional de Río Cuarto. Departamento de Geología) ;
Esteban Guzman, José Julián (Universidad del País Vasco. Departamento de Geodinámica) ;
Demartis, M. (Universidad Nacional de Río Cuarto. Departamento de Geología) ;
Aragón, Eugenio (Universidad Nacional de la Plata) ;
Coniglio, Jorge E. (Universidad Nacional de Río Cuarto. Departamento de Geología) ;
Pinotti, L.P. (Universidad Nacional de Río Cuarto. Departamento de Geología)
SHRIMP and LA-ICP-MS analyses carried out on zircons from the Río de los Sauces granite revealed their metamorphic and igneous nature. The metamorphic zircons yielded an age of 537±4. 8 (2σ)Ma that probably predates the onset of the anatexis during the Pampean orogeny. [...]
2020 -  10.1344/GeologicaActa2020.18.17
Geologica acta, Vol. 18 (2020) , p. 1-14 (Articles)
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2020-12-22
06:06 |
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17 p, 7.5 MB |
Age of the basement beneath the Mesozoic Lusitanian Basin revealed by granitic xenoliths from the Papôa volcanic breccia (West Iberia)
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Pereira, M.F. (Universidade de Évora. Instituto de Ciências da Terra) ;
Gama, C. (Universidade de Évora. Instituto de Ciências da Terra) ;
Silva, J.B. (Universidade de Lisboa. Departamento de Geologia) ;
Dias da Silva, Í. (Universidade de Lisboa. Departamento de Geologia)
The dyke of the Papôa volcanic breccia cross-cutting the Lower Jurassic sequence of the Lusitanian Basin (West Iberia) contains granitic xenoliths. In this study, for the first time, U-Th-Pb zircon analysis of two xenoliths yielded 298 ± 4 Ma for biotite granite and of 292 ± 2 Ma for two-mica granite, indicating that the pre-Mesozoic basement of the Lusitanian Basin includes Permian intrusions. [...]
2020 - 10.1344/GeologicaActa2020.18.16
Geologica acta, Vol. 18 (2020) , p. 1-19 (Articles)
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2020-12-22
06:06 |
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26 p, 5.7 MB |
Source rock and shale oil potential of the Pabdeh Formation (Middle-Late Eocene) in the Dezful Embayment, southwest Iran
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Alizadeh, B. (Shahid Chamran University of Ahvaz. Department of Petroleum Geology and Sedimentary Basins) ;
Opera, A. (Shahid Chamran University of Ahvaz. Department of Petroleum Geology and Sedimentary Basins) ;
Kalani, M. (National Iranian South Oil Company (NISOC). Department of Geology) ;
Alipour, M. (Shahid Chamran University of Ahvaz. Department of Petroleum Geology and Sedimentary Basins)
The Pabdeh Brown Shale Unit (BSU) is an organic-rich calcareous mudstone within the Paleogene Pabdeh Formation, which has not yet been investigated in detail. A total of 166 core and cutting samples were selected from four wells in the Dezful Embayment to investigate the organic geochemical and the mineralogical compositions, as well as the shale oil potential of the BSU. [...]
2020 - 10.1344/GeologicaActa2020.18.15
Geologica acta, Vol. 18 (2020) , p. 1-22 (Articles)
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2020-12-22
06:06 |
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21 p, 8.6 MB |
Foraminifera of shallow and very shallow facies from the upper Eocene-lower Oligocene Kazandere Member, Soğucak Formation, Thrace Basin, northwest Turkey
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Sirel, E. (Ankara University. Department of Geological Engineering) ;
Ayyıldız, T. (Ankara University. Department of Geological Engineering) ;
Deveciler, A. (Ankara University. Department of Geological Engineering)
The middle-late Eocene to early Oligocene sediments, mainly limestone of the Soğucak Formation with its shallow water marine foraminiferal species occur most widespread in the territory of the Thrace basin. [...]
2020 - 10.1344/GeologicaActa2020.18.14
Geologica acta, Vol. 18 (2020) , p. 1-21 (Articles)
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2020-12-22
06:06 |
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16 p, 12.8 MB |
The building stone of the Roman city of Lixus (NW Morocco) : provenance, petrography and petrophysical characterization
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Ajanaf, T. (Université Abdelmalek Essaadi Maroc. Département de Géologie) ;
Gómez-Gras, David (Universitat Autònoma de Barcelona. Departament de Geologia) ;
Navarro Ezquerra, Antonia (Universitat Politècnica de Catalunya. Departament de Tecnología de la Arquitectura) ;
Martín Martín, Juan Diego (Universitat de Barcelona. Departament de Geoquímica, Petrologia i Prospecció Geològica) ;
Rosell Amigó, J.R. (Universitat Politècnica de Catalunya. Departament de Tecnología de la Arquitectura) ;
Maate, A. (Université Abdelmalek Essaadi Maroc. Département de Géologie)
Characterization of building material is a key tool to assess deterioration processes and improve potential restoration works of archaeological sites. The aim of this paper is to identify and characterize the building stone used in the construction of the Phoenician-Roman city of Lixus (Larache, Morocco) by means of petrographic and petrophysical technics. [...]
2020 - 10.1344/GeologicaActa2020.18.13
Geologica acta, Vol. 18 (2020) (Articles)
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2020-12-22
06:06 |
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25 p, 7.3 MB |
Geometry and kinematics of the Baza Fault (central Betic Cordillera, South Spain) : insights into its seismic potential
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Medina-Cascales, Iván (Departamento de Ciencias de la Tierra y del Medio Ambiente, Universidad de Alicante) ;
Martin-Rojas, Iván (Universidad de Alicante. Departamento de Ciencias de la Tierra y del Medio Ambiente) ;
García-Tortosa, Francisco Juan (Universidad de Jaén. Departamento de Geología) ;
Peláez Montilla, José A. (Universidad de Jaén. Departamento de Física) ;
Alfaro García, Pedro (Universidad de Alicante. Departamento de Ciencias de la Tierra y del Medio Ambiente)
The geometry and kinematics of active faults have a significant impact on their seismic potential. In this work, a structural characterization of the active Baza Fault (central Betic Cordillera, southern Spain) combining surface and subsurface data is presented. [...]
2020 - 10.1344/GeologicaActa2020.18.11
Geologica acta, Vol. 18 (2020) , p. 1-25 (Articles)
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