Geologica acta

Geologica acta Encontrados 20 registros  La búsqueda tardó 0.01 segundos. 
1.
33 p, 8.7 MB Lower Eocene sedimentary succession and microfossil biostratigraphy in the central northern Caucasus basin / Shcherbinina, E. (Russian Academy of Sciences. Geological Institute) ; Iakovleva, A. (Russian Academy of Sciences. Geological Institute) ; Gavrilov, Yu. (Russian Academy of Sciences. Geological Institute) ; Golovanova, O. (Russian Academy of Sciences. Geological Institute) ; Muzylöv, N. (Russian Academy of Sciences. Geological Institute)
The lower Eocene sediments from the classical Paleogene section exposed along the Kheu River, northern Caucasus, southern Russia are here studied. This ca. 50m thick succession is lithologically contrasting: the lower and upper parts are composed by soft marls separated by a thick Radiolaria-rich unit of non-calcareous and low-calcareous mudstones with intercalations of compact cherty layers. [...]
2020 - 10.1344/GeologicaActa2020.18.1
Geologica acta, Vol. 18 (2020) , p. 1-XVIII (Articles)  
2.
19 p, 8.9 MB Relationship of F-Be mineralization to granites and syenites at the Ermakovka deposit (Western Transbaikalia) / Ripp, G.S. (Russian Academy of Sciences. Geological Institute) ; Izbrodin, I.A. (Russian Academy of Sciences. Geological Institute) ; Rampilov, M.O. (Russian Academy of Sciences. Geological Institute) ; Tomilenko, A.A. (Russian Academy of Sciences. Sobolev Institute of Geology and Mineralogy) ; Lastochkin, E.A. (Russian Academy of Sciences. Geological Institute) ; Posokhov, V.F. (Russian Academy of Sciences. Geological Institute)
The paper presents the mineralogical and geochemical characteristics of two groups of hydrothermal rocks and their relation with subalkaline granites of the Ermakovskoe deposit. The first group includes fluorite-phenakite-bertrandite ore bodies, occurring outside the granite massif. [...]
2020 - 10.1344/GeologicaActa2020.18.2
Geologica acta, Vol. 18 (2020) , p. 1-IV (Articles)  
3.
8 p, 669.5 KB Enodicalix (Diploporita, Aristocystitidae) : a new echinoderm genus from the Middle Ordovician of Spain / Paul, C.R.C (University of Bristol. School of Earth Sciences) ; Gutiérrez-Marco, Juan Carlos (Centro Superior de Investigaciones Científicas. Instituto de Geociencias)
Restudy of an Ordovician diploporite specimen from the Middle Ordovician of central Spain reveals that the species 'Calix'inornatusMeléndez has four ambulacra, each with two equal facets, an oval hydropore and a smooth thecal surface. [...]
2020 - 10.1344/GeologicaActa2020.18.3
Geologica acta, Vol. 18 (2020) , p. 1-8 (Articles)  
4.
27 p, 1001.4 KB Middle-Upper Triassic stratigraphy and structure of the Alt Palància (eastern Iberian Chain) : a multidisciplinary approach / Ortí Cabo, Federico (Universitat de Barcelona. Departament de Mineralogia, Petrologia i Geologia Aplicada) ; Guimerà i Rosso, Joan J. (Universitat de Barcelona. Departament de Geodinàmica i Geofísica) ; Götz, Annette E. (University of Portsmouth. School of Earth and Environmental Sciences)
The present study provides new data of the Middle-Upper Triassic successions and their deformation in the eastern Iberian Chain, where contractional tectonics during the Cenozoic disrupted this Mediterranean type of Triassic rocks. [...]
2020 - 10.1344/GeologicaActa2020.18.4
Geologica acta, Vol. 18 (2020) , p. 1-II (Articles)  
5.
20 p, 12.5 MB Magnetic mineralogy of Variscan granites from northern Portugal : an approach to their petrogenesis and metallogenic potential / Cruz, Claudia (Universidade do Porto. Departamento de Geociências Ambiente e Ordenamento do Território) ; Sant'Ovaia, H. (Universidade do Porto. Departamento de Geociências Ambiente e Ordenamento do Território) ; Noronha, F. (Instituto de Ciências da Terra-Polo Porto)
Northern Portugal is characterized by the occurrence of numerous W hydrothermal deposits spatially associated with granites. The primary goal of this work is to establish a relationship between the magnetic behavior of the granites and the redox conditions during magma genesis, as this can influence the occurrence of mineralizations, namely of W (Mo). [...]
2020 - 10.1344/GeologicaActa2020.18.5
Geologica acta, Vol. 18 (2020) , p. 1-20 (Articles)  
6.
10 p, 485.1 KB On the Anthropocene formalization and the proposal by the Anthropocene Working Group / Soriano Clemente, Carles (Consejo Superior de Investigaciones Científicas (Espanya). Institut de Ciències de la Terra Jaume Almera)
In the coming years the Anthropocene will be likely submitted to formalization by the Anthropocene Working Group as a chronostratigraphic unit of the Geologic Time Scale. This has generated an increasing debate among detractors and defenders of its formalization in general, and of the proposal by the Anthropocene Working Group in particular. [...]
2020 - 10.1344/GeologicaActa2020.18.6
Geologica acta, Vol. 18 (2020) , p. 1-10 (Articles)  
7.
29 p, 17.6 MB Stratigraphy and sedimentology of distal-alluvial and lacustrine deposits of the western-central Ebro Basin (NE Iberia) reflecting the onset of the middle Miocene Climatic Optimum / Larena, Zuriñe (Universidad del País Vasco. Departamento de Estratigrafía y Paleontología) ; Arenas Abad, María Concepción (Universidad de Zaragoza. Departamento de Ciencias de la Tierra) ; Baceta Caballero, Juan Ignacio (Universidad del País Vasco. Departamento de Estratigrafía y Paleontología) ; Murelaga Bereicua, Xabier (Universidad del País Vasco. Departamento de Estratigrafía y Paleontología) ; Suárez-Hernando, Oier (Universidad del País Vasco. Departamento de Estratigrafía y Paleontología)
The stratigraphic and sedimentologic study of Miocene deposits in the Plana Negra-Sancho Abarca area fills a gap in the Ebro Basin knowledge. Five main lithofacies were characterized and mapped. The boundary between regional tectosedimentary units T5 and T6 is recognized as a conformity at a major facies change. [...]
2020 - 10.1344/GeologicaActa2020.18.7
Geologica acta, Vol. 18 (2020) , p. 1-III (Articles)  
8.
13 p, 1019.6 KB Customization, extension and reuse of outdated hydrogeological software / Serrano-Juan, A. (Consejo Superior de Investigaciones Científicas (Espanya). Instituto de Diagnóstico Ambiental y Estudios del Agua) ; Criollo Manjarrez, Rotman Alejandro (Consejo Superior de Investigaciones Científicas (Espanya). Instituto de Diagnóstico Ambiental y Estudios del Agua) ; Vázquez-Suñè, Enric (Consejo Superior de Investigaciones Científicas (Espanya). Instituto de Diagnóstico Ambiental y Estudios del Agua) ; Alcaraz, M. (Instituto de Hidrología de Llanuras "Dr. Eduardo Usunoff" (Buenos Aires, Argentina)) ; Ayora Ibáñez, Carlos (Consejo Superior de Investigaciones Científicas (Espanya). Instituto de Diagnóstico Ambiental y Estudios del Agua) ; Velasco Mansilla, Violeta (Consejo Superior de Investigaciones Científicas (Espanya). Instituto de Diagnóstico Ambiental y Estudios del Agua) ; Scheiber Pagès, Laura (Consejo Superior de Investigaciones Científicas (Espanya). Instituto de Diagnóstico Ambiental y Estudios del Agua)
Each scientist is specialisted in his or her field of research, site of research and in the tools he or she uses during the research. Then, he or she is the most suitable person to improve the used tools by overcoming their limitations and for achieving faster and higher quality analysis. [...]
2020 - 10.1344/GeologicaActa2020.18.9
Geologica acta, Vol. 18 (2020) , p. 1-13 (Articles)  
9.
19 p, 3.1 MB The Neogene and Quaternary deposits of the Barcelona city through the high-speed train line / Salvany i Duran, Josep Maria (Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental) ; Aguirre Rodríguez, Julio (Universidad de Granada. Departamento de Estratigrafía y Paleontología)
A total of 208 boreholes with continuous core sampling, drilled for the construction of the high-speed train line through the city of Barcelona and other nearby infrastructures, were studied. The correlation of the lithologic logs of these boreholes allows identifying five main depositional sequences bounded by sharp erosional surfaces: (1) lower Miocene, of alluvial origin; (2) middle Miocene, of deltaic-lacustrine origin; (3) lower Pliocene, of beach-shelf origin; (4) Pleistocene, of alluvial origin, and (5) Holocene, of deltaic origin. [...]
2020 - 10.1344/GeologicaActa2020.18.10
Geologica acta, Vol. 18 (2020) , p. 1-19 (Articles)  
10.
25 p, 7.3 MB Geometry and kinematics of the Baza Fault (central Betic Cordillera, South Spain) : insights into its seismic potential / 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)  
11.
11 p, 3.1 MB Wildfire evidence from the Middle and Late Permian Hanxing Coalfield, North China Basin / Xiao, L. (Hebei University of Engineering) ; Zhao, Q. (Hebei University of Engineering) ; Wang, J. (Hebei University of Engineering) ; Mishra, V. (Hebei University of Engineering) ; Arbuzov, S.I. (University Tomsk. Department of Geology and Geochemistry) ; Zhang, M. (Hebei University of Engineering)
Earth has a long geological history and palaeo-wildfire is one of the key factors which is responsible for the evolution and extinction of our earth systems. Thus, it is important to establish the history in order to gain more understanding about Permian-Triassic mass extinction. [...]
2020 - 10.1344/GeologicaActa2020.18.12
Geologica acta, Vol. 18 (2020) , p. 1-11 (Articles)  
12.
16 p, 12.8 MB The building stone of the Roman city of Lixus (NW Morocco) : provenance, petrography and petrophysical characterization / 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)  
13.
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 / 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)  
14.
26 p, 5.7 MB Source rock and shale oil potential of the Pabdeh Formation (Middle-Late Eocene) in the Dezful Embayment, southwest Iran / 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)  
15.
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) / 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)  
16.
14 p, 3.2 MB Time lag between metamorphism and crystallization of anatectic granites (Córdoba, Argentina) / 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)  
17.
38 p, 6.8 MB Insights into the structural evolution of the pre-Variscan rocks of the Eastern Pyrenees from La Molina quartz veins; constraints on chlorite and fluid inclusion thermometry / González-Esvertit, Eloy (Universitat de Barcelona. Departament de Mineralogia, Petrologia i Geologia Aplicada) ; Canals i Sabaté, Angels (Universitat de Barcelona. Departament de Mineralogia, Petrologia i Geologia Aplicada) ; Casas Tuset, Josep María (Universitat de Barcelona. Departament de Dinàmica de la Terra i de l'Oceà) ; Nieto García, Fernando Javier (Universidad de Granada. Departamento de Mineralogía y Petrología)
Quartz veins hosted in the infra and overlying series to the (Sardic) Upper Ordovician Unconformity provide new insights into the structural and thermal evolution of the pre-Variscan rocks of the Eastern Pyrenees. [...]
2020 - 10.1344/GeologicaActa2020.18.18
Geologica acta, Vol. 18 (2020) , p. 1-XVIII (Articles)  
18.
13 p, 1.5 MB Geochemistry of the Precambrian Basement of the Bamenda massif of southeastern Nigeria : petrogenesis and tectonic setting / Ibe, C.U. (University of Nigeria. Department of Geology)
Trace and Rare-Earth element geochemical study of twenty samples of migmatitic banded gneisses, garnet biotite schists, dolerites, granites and rhyolites was carried out in a bid to determine their petrogenetic and tectonic significance in the evolution of the southeastern Basement complex of Nigeria. [...]
2020 - 10.1344/GeologicaActa2020.18.19
Geologica acta, Vol. 18 (2020) , p. 1-9; I-IV (Articles)  
19.
19 p, 19.5 MB 3D reconstruction of syn-tectonic strata deposited during the inversion of salt-related structures : insights from the Llert syncline (South-central Pyrenees) / Ramos Ordoño, Adrià (Universitat de Barcelona. Departament de Dinàmica de la Terra i de l'Oceà) ; Lopez-Mir, Berta (Universitat de Barcelona. Departament de Dinàmica de la Terra i de l'Oceà) ; Wilson, Elisabeth P. (Universitat de Barcelona. Departament de Dinàmica de la Terra i de l'Oceà) ; Martínez Granado, Pablo (Universitat de Barcelona. Departament de Dinàmica de la Terra i de l'Oceà) ; Muñoz de la Fuente, Josep Anton (Universitat de Barcelona. Departament de Dinàmica de la Terra i de l'Oceà)
The Llert syncline is located in the South-central Pyrenees, between the eastern termination of the EW-trending Cotiella Basin and the north-western limb of the NS-trending Turbón-Serrado fold system. [...]
2020 - 10.1344/GeologicaActa2020.18.20
Geologica acta, Vol. 18 (2020) , p. 1-19 (Articles)  
20.
72 p, 12.2 MB Paleocene Larger Foraminifera from Pyrenean Basin : Recalibration of the Shallow Benthic Zones / Serra-Kiel, Josep (Universitat de Barcelona. Departament d'Estratigrafia, Paleontologia i Geociències Marines) ; Vicedo, Vicent (Museu de Ciències Naturals de Barcelona, Departament de Paleontologia) ; Baceta Caballero, Juan Ignacio (Universidad del País Vasco. Departamento de Estratigrafía y Paleontología) ; Bernaola Bilbao, Gilen (Universidad del País Vasco. Departamento de Ingeneniería Minera y Metalúrgica y Ciencia de los Materiales) ; Robador Moreno, Alejandro (Instituto Geológico y Minero de España)
A taxonomic study of the larger foraminifera found in Paleocene rocks from the Pyrenean basin has led to the description of sixty taxa including two new species: Alveolina korresensis and Valvulineria bacetai. [...]
2020 - 10.1344/GeologicaActa2020.18.8
Geologica acta, Vol. 18 (2020) , p. 1-70 (Biochronology of the South Pyrenean Cenozoic, Serra-Kiel)  

¿Le interesa recibir alertas sobre nuevos resultados de esta búsqueda?
Defina una alerta personal vía correo electrónico o subscríbase al canal RSS.