Person: Fernández Barrenechea, José María
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First Name
José María
Last Name
Fernández Barrenechea
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Ciencias Geológicas
Department
Mineralogía y Petrología
Area
Cristalografía y Mineralogía
Identifiers
15 results
Search Results
Now showing 1 - 10 of 15
Item Early Triassic-Anisian continental sediments from SE Iberian ranges: sedimentological and mineralogical features(Macla, 2008) Galán Abellán, Ana Belén; Fernández Barrenechea, José María; López Gómez, José; Lago San José, Marceliano; Benito Moreno, María IsabelItem Mineralogía del tránsito Pérmico-Triásico en sedimentos continentales del SE de la cordillera Ibérica: implicaciones paleoambientales(Macla, 2004) Fernández Barrenechea, José María; Rodas González, Magdalena; Benito Moreno, María Isabel; López Fraguas, Francisco Javier; Alonso Azcárate, J.; Arche Miralles, Alfredo; Horra Del Barco, Raúl De La- Project number: 196
Item Análisis de la evolución en la adquisición de competencias específicas y transversales en los Grados de Geología e Ingeniería Geológica(2019) García Lorenzo, María De La Luz; Abati Gómez, Jacobo; Orejana García, David; Castiñeiras García, Pedro; Crespo Feo, María Elena; Piña García, Rubén; García Romero, Emilia; Granja Bruña, José Luis; López García, José Ángel; Fernández Barrenechea, José María; Arribas Mocoroa, María Eugenia; Ortega Menor, Lorena; Pérez Moreno, Elisa María; Benito Moreno, María Isabel - Project number: 196
Item Material audiovisual para el mural "El Tiempo en Geología" de la Facultad de Ciencias Geológicas(2020) García Lorenzo, María De La Luz; Arroyo Rey, Xabier; Soutullo García, Belén; Abati Gómez, Jacobo; Benito Moreno, María Isabel; Álvarez Sierra, María De Los Ángeles; Arribas Mocoroa, José; Arribas Mocoroa, María Eugenia; Castiñeiras García, Pedro; Crespo Feo, María Elena; Fernández Barrenechea, José María; García Romero, Emilia; Granja Bruña, José Luis; Iglesias Martínez, Mario; De Ignacio San José, Cristina; Martín Chivelet, Javier; Muñoz Martín, Alfonso; Orejana García, David; Ortega Menor, Lorena; Pieren Pidal, Agustín Pedro; Piña García, Rubén; Fernández Martín, Elena; Fernández Suffo, Paula; Muñoz Gallego, AlmudenaLa Geología abarca toda la historia del planeta, por lo que se hace inviable utilizar conceptos temporales de nuestra vida cotidiana. Por ello, se ha realizado un friso para el hall de la Facultad y para presentarlo, se ha realizado un vídeo explicativo del mismo. - Project number: 60
Item Construyendo paisajes de arena: la caja de arena de realidad aumentada para la docencia de los Grados de Geología e Ingeniería Geológica(2023) García Lorenzo, María De La Luz; Abati Gómez, Jacobo; Almorox Zapico, Cora; Andonaegui Moreno, María Del Pilar; Arribas Mocoroa, María Eugenia; Arroyo Rey, Xabier; Benito Moreno, María Isabel; Benito Sáez, Alberto; Cabanillas Núñez, Elvira; Crespo Feo, María Elena; Esbrí Víctor, José María; Ferri Moreno, Inmaculada; Fernández Barrenechea, José María; García Benito, Jesús; García Romero, Emilia; Garrote Revilla, Julio; Herranz Uguina, Arianne; Huertas Coronel, María José; Ignacio San José, Cristina de; KH Adnan, Zeena; Llanes Estrada, María Pilar; López Carmona, Alicia; Márquez González, Álvaro; Martín Chivelet, Javier; Muñoz Cemillán, Alfonso; Muñoz Martín, Alfonso; Orejana García, David; Rodríguez Martínez, Marta; Rodríguez Ortega, Álvaro; Sanz Montero, María Esther; Sanz Santos, Miguel Ángel; Suárez González, Pablo; Uribelarrea del Val, David; Zapico Alonso, Ignacio; García Lorenzo, María De La Luz - Project number: 223
Item Virtualización de afloramientos geológicos mediante herramientas digitales de muy alta resolución: una nueva aproximación virtual al trabajo de campo(2021) García Lorenzo, María De La Luz; Sánchez Donoso, Ramón; Abati Gómez, Jacobo; Ancochea Soto, Eumenio; Arribas Mocoroa, María Eugenia; Álvarez Sierra, María De Los Ángeles; Benito Moreno, María Isabel; Campos Soto, Sonia; Castiñeiras García, Pedro; Crespo Feo, María Elena; Fernández Barrenechea, José María; García Romero, Emilia; Granja Bruña, José Luis; Huertas Coronel, María José; López Andrés, Sol; Martín Chivelet, Javier; Muñoz Martín, Alfonso; Orejana García, David; Pieren Pidal, Agustín PedroEl uso de imágenes de Gigapan en la enseñanza de la Geología facilita el estudio de contenidos de campo mediante imágenes de muy alta resolución de afloramientos geológicos, que pueden ser utilizadas como herramienta de docencia virtual. Item Paleoecological and paleoenvironmental changes during the continental Middle–Late Permian transition at the SE Iberian Ranges, Spain(Global and planetary change, 2012) Horra Del Barco, Raúl De La; Galán Abellán, Ana Belén; López Gómez, José; Sheldon, N.D.; Fernández Barrenechea, José María; Luque del Villar, Francisco Javier; Arche, Alfredo; Benito Moreno, María IsabelThe Middle and Late Permian are characterized by a pair of mass-extinction events that are recorded in both marine and continental environments. Here, we present the first continental western peri-Tethyan record of an extinction event located in the Middle–Late interval. In the SE Iberian Ranges, Central Spain, the transition between the Lower and Middle subunits of the Middle Permian Alcotas Formation indicates a significant paleoclimatic change from arid and semiarid conditions towards more humid conditions. Coincident with the onset of humid conditions there were changes in the sedimentology, mineralogy, and geochemistry that indicate significant environmental changes including a shift in weathering intensity and a change of fluvial style from braided to meandering systems. Near the top of the Middle Subunit, a local biotic crisis is recorded by palynomorph assemblages. Following this crisis, there is a total absence of coal beds, plant remains, and microflora that defines a barren zone in the uppermost part of the Alcotas Formation which is recorded throughout the basin. The barren zone is accompanied by a shift back to braided stream systems, but not by a return to carbonate-bearing paleosols indicative of arid or semi-arid conditions. This combination of features is consistent with other Middle–Late continental basins related with mass extinctions, so the barren zone is interpreted as the extinction interval. The regional character of the extinction interval and its proximity with the Middle–Late Permian transition could be related with the global mid-Capitanian biotic turnover described in this period of time in other marine basins. However, the common difficulties of dating with precision non-marine rocks make this relationship difficult to probe in the Iberian Basin and in other Middle– Late Permian basins. Further work, including high resolution carbon-isotope analyses and complete studies of the magnetostratigraphy, should be desirable in order to obtain a better age constraint and to produce reliable comparisons with marine sections.Item Sources of Sr and S in Aluminum-Phosphate–Sulfate Minerals in Early–Middle Triassic Sandstones (Iberian Ranges, Spain) and Paleoenvironmental Implications for the West Tethys(Journal of sedimentary research, 2013) Galán Abellán, Ana Belén; Alonso Azcárate, Jacinto; Newton, Robert J.; Bottrell, Simon H.; Fernández Barrenechea, José María; Benito Moreno, María Isabel; Horra Del Barco, Raúl De La; López Gómez, José; Luque del Villar, Francisco JavierAluminum-phosphate–sulfate (APS) minerals, formed during early diagenesis in relation to acid meteoric waters, are the main host of Sr and S in the Early–Middle Triassic continental sandstones of the Iberian Ranges (east of the Iberian Peninsula). The sources of these elements and the effects of paleoenvironmetal changes on these sources and on the formation of APS minerals during Early–Middle Triassic times, were established on the basis of Sr and S isotopic analyses. The S and Sr data (d34S V-CDT = +11 to +14% and 87Sr/86Sr = 0.7099–0.7247, respectively) can be interpreted as resulting from mixing of different sources. Strontium was sourced from the dissolution of pre-existing minerals like K-feldspar and clay minerals inherited from the source areas, causing high radiogenic values. However, the isotopic signal must also be influenced by other sources, such as marine or volcanic aerosol that decreased the total 87Sr/86Sr ratios. Marine and volcanic aerosols were also sources of sulfur, but the d34S was lowered by dissolution of pre-existing sulfides, mainly pyrite. Pyrite dissolution and volcanic aerosols would also trigger the acid conditions required for the precipitation of APS minerals. APS minerals in the study area are found mainly in the Cañizar Formation (Olenekian?–Aegian), which has the lowest 87Sr/86Sr ratios. The lower abundance of APS minerals in the Eslida Formation (Aegian–Pelsonian) may indicate change in the acidity of pore water towards more alkaline conditions, while the increased 87Sr/86Sr ratios imply decreased Sr input from volcanic activity and/or marine aerosol inputs during Anisian times. Therefore, the decrease in abundance of APS minerals from the Early to Middle Triassic and the variations in the sources of Sr and S are indicative of changes in paleoenvironmental conditions during the beginning of the Triassic Period. These changes from acid to more alkaline conditions are also coincident with the first appearance of carbonate paleosols, trace fossils, and plant fossils in the upper part of the Cañizar Formation (and more in the overlying Eslida Formation) and mark the beginning of biotic recovery in this area. The presence of APS minerals in other European basins of the Western Tethys (such as the German Basin, the Paris Basin and the southeastern France and Sardinia basins) could thus also indicate that unfavorable environmental conditions caused delay in biotic recovery in those areas. In general, the presence of APS minerals may be used as an indicator of arid, acidic conditions unfavorable to biotic colonization.Item Shallow burial dolomitisation of Middle–Upper Permian paleosols in an extensional tectonic context (SE Iberian Basin, Spain): Controls on temperature of precipitation and source of fluids(Sedimentary Geology, 2011) Benito Moreno, María Isabel; Horra Del Barco, Raúl De La; López Gómez, José; Fernández Barrenechea, José María; Luque del Villar, Francisco Javier; Arche, AlfredoThis work is focused on carbonate paleosols developed in three stratigraphic sections (Landete, Talayuelas and Henarejos) of theMiddle–Late Permian Alcotas Formation in the SE Iberian Basin. The Alcotas Formation, of alluvial origin, was deposited in semi-connected half-grabens developed during the early stages of the Permian–Triassic rifting stage that affected the Iberian Basin. The studied sections were located in two of these half-grabens, the Henarejos section being much closer to the basin boundary fault than the other two sections. The mineralogy and texture of the carbonate precursor of paleosols in the three studied sections are not preserved because original carbonate is replaced by coarse crystals of dolomite and/or magnesite. Dolomite crystals are typically euhedral, displaying rhombohedral shapes and reddish luminescence, although in the Henarejos section dolomite displays non-planar boundaries and frequently saddle habit. Micas are deformed and adapted to dolomite crystals, which, in turn, are affected by stylolites, suggesting that dolomite precipitated before mechanical and chemical compaction. Carbon and oxygen isotopic compositions of dolomite fromthe three sections showdifferent values (δ13CVPDB mean values=−6.7‰,−5.5‰ and −7.5‰; δ18OVPDB mean values=−4.0‰; –5.6‰and−8.2‰, at Landete, Talayuelas and Henarejos sections, respectively). The 87Sr/86Sr ratios are similar in the three sections yielding values between 0.71391 and 0.72213. The petrographic and geochemical features of dolomite in the three studied sections suggest precipitation fromsimilar fluids and during shallow burial diagenesis. Assuming that theminimum temperature for dolomite precipitation in the Henarejos sectionwas 60 °C (as suggested by the presence of non-planar saddle habit), and that the dolomitizing fluid had similar δ18O values at the three localities, then dolomite in the Talayuelas and Landete sections precipitated at temperatures around 16 and 25 °C cooler, respectively. In addition, the δ18OVSMOW values of the water from which dolomite precipitated would have ranged between −0.3 and −2.9‰. Dolomite is partially or totally replaced by non- to dark dull luminescent magnesite in the Landete and Talayuelas sections. Magnesite crystals are affected by stylolites, indicating that it precipitated before chemical compaction. The δ13C mean values are −6.5 and −6.0‰ and the δ18OVPDB mean values are −6.7 and −7.8‰, in the Landete and Talayuelas sections, respectively. The 87Sr/86Sr ratios of magnesite are similar in both sections yielding values between 0.71258 and 0.72508. This suggests that they probably precipitated from similar fluids during progressive burial and at higher temperatures than dolomites at the same sections. Assuming thatmagnesite precipitated froma fluid with similar δ18O values in both sections, then it had to precipitate at a temperature around 8 °C higher in Talayuelas than in the Landete section. Dolomitisation and magnesite precipitation probably occurred via reflux of saline to hypersaline brines from the overlying Mid-Late Triassic Muschelkalk and/or Keuper facies. The temperatures inferred for dolomite precipitation, however, are too high for shallow burial if a normal geothermal gradient is applied. Thus, it can be inferred that salinefluidswere heated as theyflowed through the syn-sedimentary extensional faults that controlledMiddle Permian to Middle Triassic sedimentation; consequently fluidswould have been at higher temperatures near the Henarejos area, which was closer to the basin boundary fault than at the Talayuelas and Landete areas, whichwere situated further away. This contention is in agreement with recent studies which demonstrate that an important thermal event took place during Late Triassic–Early Jurassic times in the Iberian Peninsula.Item First report of a Middle-Upper Permian magmatism in the SE Iberian Ranges: characterisation and comparison with coeval magmatisms in the western Tethys(Journal of Iberian Geology, 2012) Fernández Barrenechea, José María; Benito Moreno, María Isabel; Lago San José, Marceliano; Galé, Carlos; López Gómez, José; Horra Del Barco, Raúl De La; Ubide Garralda, Teresa; Galán Abellán, Ana Belén; Arche, Alfredo; Alonso Azcárate, Jacinto; Luque del Villar, Francisco Javier; Timmerman, Martin J.A multiple basic to intermediate sill is reported for the first time in the south-eastern Iberian Ranges. It is composed of several tabular to irregular levels intercalated within the fluvial sediments of the Alcotas Formation (Middle-Upper Permian). The sill could represent the youngest Paleozoic subvolcanic intrusion in the Iberian Ranges. The igneous rocks are classified as basaltic andesites. They show a subophitic microstructure constituted by plagioclase (An62 – An6), augite (En48Wo44Fs7 –En46Wo39Fs15), pseudomorphosed olivine, minor amounts of oxides (magnetite and ilmenite)and accessory F-apatite. According to the mineralogy and whole-rock composition, their geochemical affinity is transitional from subalkaline to alkaline. Radiometric dating of the sill is not feasible due to its significant alteration. Field criteria, however, suggest an emplacement coeval to the deposition of the Alcotas Formation (Middle-Upper Permian). This hypothesis is supported by the transitional affinity of these rocks, similar to other Middle-Upper Permian magmatisms in the western Tethys, e.g., from the Pyrenees. Taking into account their isotopic signature (εSr: -6.8 to -9.2; εNd:+1.7 to +8.3), an enriched mantle source with the involvement of a HIMU component has been identified. This interpretation is supported by the trace element contents. Some of these HIMU characteristics have been recognised in the Middle-Upper Permian magmatisms of the Central Pyrenees (Anayet Basin) and the High Atlas (Argana Basin). However, none of these source features are shared with other Middle-Upper Permian magmatisms of the western Tethys (Catalonian Coastal Ranges, Corsica-Sardinia and southern France), nor with the Lower Permian magmatism of the Iberian Ranges. These differences support the presence of a heterogeneous mantle in the western Tethys during the Permian.