Person:
Mas Mayoral, José Ramón

First Name

José Ramón

Last Name

Mas Mayoral

Affiliation

Universidad Complutense de Madrid

Faculty / Institute

Ciencias Geológicas

Area

Estratigrafía

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Now showing 1 - 10 of 80

Interpretación estratigráfica y estructural de la Cuenca de San Pedro (margen sudeste de la República Dominicana)
(Sociedad Geológica de España., 2021) Gorosabel Araus, J.M.; Granja Bruña, José Luis; Gallego Mingo, , A.; Carbó Gorosabel, Andrés; Mas Mayoral, José Ramón; Arribas Mocoroa, José; Arribas Mocoroa, María Eugenia; López Andrés, Sol; Canales Fernández, María Luisa; Rodríguez Zurrunero, Álvaro; Reynoso-Villafaña, R.; Rosario, G.; Muñoz-Tapia, S.J.
La cuenca de San Pedro (CSP) se define como una depresión batimétrica con tendencia E-O y una extensión aproximada de 6000 km2, situada en el margen sureste de la isla de La Española (República Dominicana y Haití). Estructuralmente se ubica en la parte trasera del Cinturón Deformado de los Muertos (CDM). Considerada tradicionalmente como una cuenca de edad Mioceno medio, cuyo relleno ha sido depositado en el espacio de configuración generado por la progresiva deformación del CDM. Sin embargo, gracias a la integración de los trabajos de cartografía geológica (Proyectos SYSMIN I y II) con datos de geofísica de subsuelo (sísmica de reflexión, registros de pozo y campos potenciales), ha sido posible proponer un nuevo modelo evolutivo de la cuenca que abarca desde el inicio de la sedimentación en un contexto de retro-arco desde el Cretácico Superior hasta la inversión de la cuenca en el Eoceno medio y la posterior evolución del conjunto CSP-CDM hasta la actualidad, pudiendo correlacionar las principales secuencias estratigráficas y estructuras con los datos de afloramiento y pozo.
Evolution of an intra-plate rift basin: the Latest Jurassic-Early Cretaceous Cameros Basin (Northwest Iberian Ranges, North Spain)
(Sociedad Geológica de España, 2011) Mas Mayoral, José Ramón; Benito Moreno, María Isabel; Arribas Mocoroa, José; Alonso Millán, Ángela; Arribas Mocoroa, María Eugenia; Lohmann, K.C.; González Acebrón, Laura; Hernán, J.; Quijada, Isabel Emma; Suárez González, Pablo; Omodeo Salé, S.; Arenas, Concha; Pomar, Luis; Colombo, Ferrán
Clay minerals as provenance indicators in continental lacustrine sequences: the Leza Formation, early Cretaceous, Cameros Basin, northern Spain
(Blackwell Scientific publications, 2005) Alonso Azcárate, Jacinto; Rodas, Magdalena; Fernández Barrenechea, José María; Mas Mayoral, José Ramón
Variations in clay mineral assemblages, changes in KuÈbler index (KI), and the chemical composition of chlorites are used to identify source areas in the lacustrine materials in the Lower Cretaceous Leza Limestone Formation of the Cameros Basin, northern Spain. This formation has fairly homogeneous lithological characteristics and facies associations which do not allow for identification and characterization of local source areas. The Arnedillo lithosome of the Leza Limestone Formation contains a clay mineral association (Mg-chlorite, illite and smectite) indicative of its provenance. Chlorite composition and illite KI values indicate that these minerals were formed at temperatures higher than those reached by the Leza Formation which indicates its detrital origin. The similarity in the Mg-chlorite composition between the Arnedillo lithosome and the Keuper sediments of the area indicates that these materials acted as a local source area. This implies that Triassic sediments were exposed, at least locally, at the time of deposition of the Leza Formation. The presence of smectite in the Leza Formation is related to a retrograde diagenesis event that altered the Mg-chlorites in some samples.
Mid Cretaceous events Iberian field conference 77. Guide III partie: Chaine iberique et prebetique. Deuxime jour.
(Servicio de Publicaciones de la Universidad Complutense de Madrid, 1979) Meléndez, F.; Ramínez del Pozo, J.; Mas Mayoral, José Ramón; García, A.; Rincón, R.
Los arrecifes coralinos del Malm en la Sierra de los Cameros (La Rioja, España)
(Instituto Jaime Almera, Consejo Superior de Investigaciones Científicas. Universidad de Barcelona, Facultad de Geología, 1987) Alonso Zarza, Ana María; Mas Mayoral, José Ramón; Meléndez Hevia, María Nieves
El ultimo episodio marino del Jurásico de la Sierra de los Cameros (La Rioja sur) se caracteriza por el desarrollo local de complejos arrecifales coralinos. El estudiado aquí está constituido por una progradación de arrecifes franjeantes que presenta acreción frontal casi exclusiva, aunque con cierta acreción vertical durante la maduración de cada edificio. Su funcionamiento estaría controlado por pulsos de levantamiento tectónico con emersión (mecanismo dominante) y eustatismo positivo (mecanismo subordinado).
Do stromatolites Need Tides to trap Oodis? insights from the Coastal-Lake carbonates of the Leza FM (Early Cretaceous, N Spain)
(Université de Caen, 2012) Suárez González, Pablo; Quijada, Isabel Emma; Benito Moreno, María Isabel; Mas Mayoral, José Ramón
Petroleum systems modelling in a fold-and-thrust belt setting: the inverted Cameros basin, north-central Spain
(Wiley, 2019-04) Omodeo Salé, S.; Ondrak, R.; Arribas Mocoroa, José; Mas Mayoral, José Ramón; Guimerà, J.; Martínez, L.
The Mesozoic Cameros Basin, northern Spain, was inverted during the Cenozoic Alpine orogeny when the Tithonian – Upper Cretaceous sedimentary fill was uplifted and partially eroded. Tar sandstones outcropping in the southern part of the basin and pyrobitumen particles trapped in potential source rocks suggest that hydrocarbons have been generated in the basin and subsequently migrated. However, no economic accumulations of oil or gas have yet been found. This study reconstructs the evolution of possible petroleum systems in the basin from initial extension through to the inversion phase, and is based on structural, stratigraphic and sedimentological data integrated with petrographic and geochemical observations. Petroleum systems modelling was used to investigate the timing of source rock maturation and hydrocarbon generation, and to reconstruct possible hydrocarbon migration pathways and accumulations. In the northern part of the basin, modelling results indicate that the generation of hydrocarbons began in the Early Berriasian and reached a peak in the Late Barremian – Early Albian. The absence of traps during peak generation prevented the formation of significant hydrocarbon accumulations. Some accumulations formed after the deposition of post‐extensional units (Late Cretaceous in age) which acted as seals. However, during subsequent inversion, these reservoir units were uplifted and eroded. In the southern sector of the basin, hydrocarbon generation did not begin until the Late Cretaceous due to the lower rates of subsidence and burial, and migration and accumulation may have taken place until the initial phases of inversion. Sandstones impregnated with bitumen (tar sandstones) observed at the present day in the crests of surface anticlines in the south of the basin are interpreted to represent the relics of these palaeo‐accumulations. Despite a number of uncertainties which are inherent to modelling the petroleum systems evolution of an inverted and overmature basin, this study demonstrates the importance of integrating multidisciplinary and multi‐scale data to the resource assessment of a complex fold‐and‐thrust belt.
Control tectónico e influencia del eustatismo en la sedimentación del Cretácico inferior de la cuenca de Los Cameros
(Editorial Complutense, 1993) Alonso-Zarza, Ana María; Mas Mayoral, José Ramón
La sedimentación durante el Jurásico terminal y el Cretácico inferior en la Cuenca de Los Cameros se desarrolla en cuatro Secuencias deposicionales de forma tal que todas comienzan con facies siliciclásticas fluviales y terminan (excepto la IV) con facies calcáreas de origen lacustre. El control tectónico durante la sedimentación es muy claro y se manifiesta de diversas maneras y escalas, pero el control eustático también parece jugar un papel importante. Para estudiar estos factores se ha analizado con detalle una de las etapas lacustres en la cuenca, concretamente la que termina la Secuencia deposicional III (Barremiense - Aptiense), y se ha elegido la franja mas nororiental de la misma. En esta unidad (la Formación Calizas de Leza), y en ese sector, se ha realizado un análisis sedimentológico detallado identificando cuatro grupos de facies que corresponden a la sedimentación en lagos carbonáticos costeros, con etapas de influencia marina neta. También se ha reconstruido la cuenca para la etapa Barremiense - Aptiense, que formaba una gran rampa basculada hacia el NE, en cuyo borde nororiental se desarrollaba la sedimentación lacustre-costera que nos ocupa. La influencia marina proviene del SE, del Tetis, ya que durante esa etapa en el resto de la cuenca Ibérica se produjo la mas importante transgresión del Cretácico inferior en la zona. Por otro lado, la Formación Leza está formada por seis litosomas carbonáticos claramente diferenciados, limitados por paleofracturas que funcionaron durante la sedimentación de la unidad y que fueron fosilizadas posteriormente. El control tectónico está ejercido por una fractura de bajo ángulo en el margen noreste, buzando hacia el sur, que durante la etapa distensiva, de formación de la cuenca, actuó como “detachment” y que durante la etapa de inversión alpina actuó de nuevo originando un cabalgamiento de cerca de 30 km claramente apreciable en los perfiles sísmicos disponibles.
Fluid migration recorded by fluid inclusions in crack-sealed quartz veins and sandstone host rock; Cameros Basin, Spain
(Universidad Complutense de Madrid, 2021-08-11) González Acebrón, Laura; López Elorza, Maialen; Mas Mayoral, José Ramón; Arribas Mocoroa, José; Omodeo-Salé, Silvia
The role of deep hydrothermal fluid circulation through fractures and their impact on the sandstone host rock is studied in an extensional sedimentary basin (Cameros Basin, Spain) affected by a post-extensional hydrothermal metamorphism. The quartzarenites of the Urbión Group constituted a hydrocarbon carrier affected by very low to low-grade hydrothermal metamorphism during Late Albian to Coniacian. This process generated abundant quartz veins and transformed the quartzarenites into quartzites. This study compares the microthermometry of the fluid inclusion asemblages (FIAs) in the veins and in the quartz grain overgrowths in the quartzites, in order to understand the behavior of the hydrothermal fluids through fractures and their effects in the host rock. Fluid inclusions in the quartz grain overgrowths contain liquid and vapor at room temperature and homogenize to the liquid (Th: 124–265 °C, H2O + NaCl system). Those of quartz veins present both liquid and vapor CO2 and an aqueous liquid phase (room temperature). Final homogenization is to the liquid (Th: 109–282 °C, H2O + NaCl + CO2, mean values of amount-of-substance fractions: 0.92, 0.01, 0.07). Large Th variation within each FIA is common, due to crack and sealing processes and to reequilibration by successive thermal pulses. In contrast, the narrow Th range in each FIA towards the top of the record indicates that these inclusions are probably not reequilibrated. Two growing stages are recognized under SEM-CL in the quartz grain overgrowths, one diagenetic and another hydrothermal, the later with FIAs showing Th similar than the veins. The results can help in the evaluation of the geo-energy resources in sedimentary basins.
Aalenian pulses of tectonic activity in the Iberian Basin, Spain
(Elsevier, 2008) García Frank, Alejandra; Ureta Gil, María Soledad; Mas Mayoral, José Ramón
In the northwest Iberian Range the Aalenian to Bajocian interval is represented by condensed, as well as more expanded marine carbonate strata deposited in a shallow epicontinental-sea setting. Precise biochronological data (successive ammonites assemblages) from 29 measured sections, along with a bedby- bed facies analysis, allowed a detailed correlation between sections, the definition of a number of successive transgressive–regressive cycles and of two distinct sedimentation areas, as well as the compilation of isopach maps for short time intervals (duration of ammonites Zone/Subzone) and the assessment of sediment accumulation rates. Differences in facies and thickness in the studied interval, and the sequential organization, reveal significant changes in the depositional environment. A tectonically-controlled compartmentalization of the sedimentation area is suggested by a detailed reconstruction of the accumulation history. An active extensional tectonic regime is supported by contemporaneous volcanic activity in the southeastern Iberian Basin. A precise timing of the main tectonic pulses recorded in NW Iberian Basin for the Upper Toarcian–Lower Bajocian interval is presented, which may help to better resolve the stratigraphy in otherW European during this time interval.