Félix Rubio

Instituto Geológico y Minero de España

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C. Ayala

Geociencias Barcelona

Emilio L. Pueyo

Instituto Geológico y Minero de España

Carmen Rey‐Moral

Instituto Geológico y Minero de España

Ruth Soto

Instituto Geológico y Minero de España

Antonio María Casas Sáinz

Universidad Complutense de Madrid

Pilar Clariana

Instituto Geológico y Minero de España

Belén Oliva-Urcía

Universidad de Zaragoza

José Luis García-Lobón

Instituto Geológico y Minero de España

Teresa Román‐Berdiel

Universidad de Zaragoza

Adriana Rodríguez-Pintó

Grantmakers for Effective Organizations

Cooperative Institutions

Instituto Geológico y Minero de España

Consejo Superior de Investigaciones Científicas

Universitat de Barcelona

Geociencias Barcelona

Universidad de Zaragoza

National Laboratory of Energy and Geology

Universidad Complutense de Madrid

Universitat Politècnica de Catalunya

National Institute of Engineering, Technology and Innovation

Universidad de Salamanca

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Nueva campaña geofísica en el acuífero aluvial del río Verde (Almuñecar, Granada)

BOLETÍN GEOLÓGICO Y MINERO (2002)

Juan Luis Plata Torres Félix Rubio

La revision de la informacion geoelectrica existente en la vega del rio Verde en las proximidades de Almunecar (Granada), realizada con objeto de verificar su utilidad para contrastar los nuevos valores tomados con un equipo de prospeccion magnetotelurica tensorial de alta resolucion (ENVIRO-MT), puso de manifiesto que la interpretacion dada a los SEVs efectuados en 1977 no se correspondia con la situacion real, conocida posteriormente mediante la realizacion de sondeos mecanicos. Al no disponer de los datos de campo originales de la cam-pana geofisica para proceder a su reinterpretacion, en el ano 1998 se realizo una nueva campana de SEVs. La metodologia seguida para la interpretacion de estos SEVs tiene cuatro etapas. En primer lugar, por agrupacion de las curvas de campo en familias de similar mor-fologia, se ha dividido el area estudiada en zonas de comportamiento geoelectrico analogo, lo que sirve de buena orientacion para su pos-terior interpretacion en terminos hidrogeologicos. En segundo lugar, a partir de SEVs parametricos (realizados junto a sondeos mecani-cos) se ha asignado a cada litologia un rango de valores de resistividad. Posteriormente, se ha extendido el modelo geoelectrico al resto de los SEVs efectuados en esta campana, y por correlacion se ha procedido al trazado de cortes de resistividades con significacion geolog-ica. Se ha puesto asi de manifiesto que en una zona como la estudiada, donde la informacion litologica es abundante, la realizacion de unos pocos SEVs permite el establecimiento de la morfologia del acuifero con gran detalle, identificandose la posicion de posibles pale-ocauces y definiendo con precision la evolucion del espesor total de sedimentos.

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Microgravimetric and seismic joint characterisation of the basement in Hontomín (Spain)

Juvenal Andrés Juan Alcalde P. Ayarza Eduard Saura Ignacio Marzán

Basement

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Developing a new innovative methodology to integrate geophysical techniques into characterization of potential CO ₂ storage sites: Lopín structure (southern Ebro Basin, Spain)

Geological Society London Special Publications (2022)

C. Ayala Beatriz Benjumea José Arribas Jesús García-Crespo Pilar Clariana

Abstract One of the main challenges facing geological storage is to identify cost-effective methodological workflows for characterizing and monitoring geological storage sites. In the framework of the ALGECO2 project, led by the IGME (Geological and Mining Institute, Spain), a preliminary study of the Lopín site in the NE of Spain indicated conditions were promising for geological storage of CO 2 . However, the poor quality of the legacy seismic reflection data precluded thorough characterization. Within the H2020 PilotSTRATEGY project, one of the possible selected target reservoirs was the Lopín structure. In order to characterize its geometry and physical properties as required to properly evaluate its storage potential, IGME applied a new emerging methodology that integrates reinterpreted reflection seismic data with newly acquired and interpreted gravity, passive seismic and petrophysical data. This methodology was successfully applied along one seismic profile. In this paper, we present the results of this integration as the first step towards characterizing the site and evaluating its suitability for storage.

Petrophysics

Reflection

10.1144/sp528-2022-70

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Citations (4)

Nuevos datos gravimétricos en los Pirineos Centrales (NE de España)

Geogaceta (2020)

C. Ayala Félix Rubio Carmen Rey Moral Emilio. L. Pueyo Morer M. P. Clariana

espanolThe GeoPiri3D project aims to characterize the geometry and kinematics of the Permo-Carboniferous batholiths of the Central Pyrenees through a combination of potential fields and structural data. During 2018 we have acquired 824 new gravity stations and 186 rock samples. The gravity data were proces-sed and integrated into the IGME database and a new Bouguer anomaly was calculated. The two main granite bodies (La Mala-deta and Andorra-Mount Louis) provide different gravimetric responses. The anomaly on the La Maladeta granite outcrop presents a zonation with small variations in its amplitude. The petrophysical data provide an average density of ca. 2.6 g/cm3, which is consistent with its granodioritic composition. The out-crop of the Andorra-Mount Louis pluton is characterized by a relative minimum, suggesting a dominant granitic composition. In addition, the minimum extends in an oblique NE direction in-dicating that part of the pluton is buried. The relative minimum to the SW of La Maladeta is probably linked to accumulations of Triassic evaporites. EnglishEl proyecto GeoPiri3D tiene como objetivo caracterizar la geo-metria y la cinematica de los batolitos permo-carboniferos del Piri-neo Central por medio de una combinacion de campos potenciales y de datos estructurales. Durante 2018 se han adquirido 824 nuevas estaciones de gravedad y 186 muestras de roca. Los datos de gra-vedad se han procesado e integrado en la base de datos del IGME y se ha calculado un nuevo mapa de anomalias de Bouguer. Los dos cuerpos graniticos principales (La Maladeta y Andorra-Mount Louis) proporcionan diferentes respuestas gravimetricas. La anomalia sobre el afloramiento de granito de La Maladeta presenta pequenas variaciones en su amplitud que se asocian con cambios de facies. Los datos petrofisicos proporcionan una densidad media de ca. 2,6 g/cm3 que son consistentes con su composicion, predominantemente granodioritica. El afloramiento del pluton de Mount Louis-Andorra se caracteriza por un minimo relativo, lo que sugiere una composicion predominantemente granitica (aun no se tienen resultados de las me-didas de densidad). Ademas, el minimo se extiende en direccion NE, lo que sugiere que parte del pluton esta enterrado. El minimo relativo al SO del granito de La Maladeta probablemente esta relacionado con las acumulaciones de evaporitas triasicas.

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Modelling of the Cala area (Ossa-Morena Zone)

Mineral resource reviews (2015)

Teresa Sánchez-García F. Bellido José Arribas José Luis García-Lobón Jesús García-Crespo

Orogeny

Massif

Anticline

Basement

10.1007/978-3-319-17428-0_12

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Morphotectonic setting of maar lakes in the Campo de Calatrava Volcanic Field (Central Spain, SW Europe)

Sedimentary Geology (2009)

A. Martín-Serrano Juana Vegas Salamanca Ángel García‐Cortés L. Galán José Luis Gallardo-Millán

Maar

Phreatomagmatic eruption

Diatreme

Lava field

10.1016/j.sedgeo.2009.07.005

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Citations (45)

Petrophysical Characterization of Non-Magnetic Granites; Density and Magnetic Susceptibility Relationships

Geosciences (2022)

Emilio L. Pueyo Teresa Román‐Berdiel Pablo Calvín J. L. Bouchez Elisabet Beamud

In this work we establish reliable correlations between density and magnetic susceptibility in three paramagnetic granites from the Pyrenees. In total, 128 sites (310 density measurements and >2600 susceptibility ones) were studied in the Mont Louis-Andorra, Maladeta and Marimanha granitic plutons covering the main range of variability of magnetic susceptibility. Regressions were calculated for every granitic body and an integrated linear function was obtained for the entire dataset: ρ (kg/m3) = 2566 (kg/m3) + 0.541κ (10−6 S.I.) (R:0.97). This relationship is only valid in the paramagnetic domain, where iron is mostly fractioned in iron-bearing phyllosilicates and the occurrence of magnetite is negligible (or at least its contribution to the bulk susceptibility). This relationship, likely different in other bodies, allows for transforming magnetic susceptibility data into density data, helping to constrain gravity modelling when density data from rock samples are scarce. Given the large amount of AMS studies worldwide, together with the quickness and cost-effectiveness of susceptibility measurements with portable devices, this methodology allows for densifying and homogenizing the petrophysical data when modelling granite rock volumes based on both magnetic and gravimetric signals.

Petrophysics

10.3390/geosciences12060240

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Citations (7)

Three‐dimensional geophysical characterization of the La Rambla and Zafra de Záncara anticlines (Loranca Basin, Central Spain)

Geophysical Prospecting (2019)

C. Ayala Félix Rubio Carmen Rey‐Moral María Isabel Reguera Cristina Biete

ABSTRACT The Zafra de Záncara anticline (also known as the El Hito anticline), located in the Loranca Cenozoic Basin (part of the Tagus Basin, Central Spain), had been studied by several oil companies during the late 1960s and early 1970s. In 2009, within the ‘Plan for selection and characterization of suitable structures of CO 2 geological storage’, this anticline was selected as a potential CO 2 storage site. A preliminary three‐dimensional geological model, based on five geological cross sections that were constrained with the interpretation of the available seismic profiles (that are rather old and do not have very good quality), was created. With the aim of improving the geological knowledge of the Zafra de Záncara anticline and helping to investigate the suitability of a nearby anticline, namely La Rambla, as another structural closure that might make it a possible CO 2 storage site, a local gravity survey (1 station every km 2 ) was carried out in the area, seven new geological cross sections, based on these existing seismic profiles and field geology, were build, and a new three‐dimensional geological model that included both anticlines, improved through three‐dimensional stochastic gravity inversion, was constructed. The densities needed for the geological formations of the model come from the analysis of rock samples, logging data from El Hito‐1 drillhole and petrophysical information from Instituto Geológico y Minero de España database. The inversion has improved the knowledge about the geometry of the anticlines’ traps and seals as well as the geometry of the basement relief and the structural relationship between basement and cover.

Anticline

Petrophysics

10.1111/1365-2478.12745

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Citations (2)

Updated Bouguer anomalies of the Iberian Peninsula: a new perspective to interpret the regional geology

Journal of Maps (2016)

C. Ayala Fernando Bohoyo Adolfo Maestro María Isabel Reguera Montserrat Torné

Bouguer anomaly maps are powerful cartographic tools used mainly by geoscientists and natural resources' companies (oil, mining, etc.) since they reflect rock density distribution at different depths, allowing the identification of different tectonic features. At upper crustal levels, Bouguer anomaly maps can help, for instance, in characterizing possible ore deposits, ground water reservoirs, petroleum resources, CO2 storage sites and sedimentary basins; at deeper crustal levels they can help to further refine seismic velocity models or other integrated geophysical models and thus help in deciphering the lateral density variations within the crust and the geometry of the base of the crust. This new Bouguer anomaly map at a 1:1,500,000 scale is based on the compilation of 210,283 gravity stations covering the Iberian Peninsula (c. 583,254 km2). The new map upgrades previous maps in two ways: (1) it is built up from a database with a 15% more spatial coverage than previous compilations and (2) it is freely available. This map show shorter wavelengths than previous published maps thus allowing investigation of smaller geological features.

Peninsula

Anomaly (physics)

10.1080/17445647.2015.1126538

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Citations (42)

The western termination of the South Pyrenean Triangle Zone; a structural and geophysical characterization.

Pablo Santolaria C. Ayala Emilio L. Pueyo Félix Rubio Ruth Soto

<p>The presence of multiple evaporite levels strongly influence the structural style and kinematics of fold-and-thrust belts. Particularly (but not exclusively) in their fronts, it is common for these d&#233;collements to favor the formation of triangle zones. In the central portion of the Pyrenees, the South Pyrenean Triangle Zone represents the frontal part of this chain, that involves the Oligocene-Miocene Ebro Basin foreland deposits. We have focused on its western termination, characterized by a salt-cored anticline that laterally passes to a backthrust which dies out to the west. These structures are detached on the Upper Eocene-Lower Oligocene syntectonic evaporite Barbastro Formation (and lateral equivalents) that acted as a multidetachment unit. To the north, the south-directed Pyrenean thrust unit detached on Middle-Upper Triassic evaporites to finally glide along the Upper Eocene-Lower Oligocene d&#233;collement horizons.</p><p>In this contribution, we present a detailed structural and stratigraphic model of this triangle zone termination, constructed accordingly to two major approaches (1) constraining the geometry and structural architecture based on surface geology, interpretation of seismic lines (>900 km) and wells and, (2) obtaining the 3D density distribution of the detachment level (Barbastro Fm. and lateral equivalents as well as deeper, Triassic evaporites) using gravity stochastic inversion by means of more than 7000 gravity stations and 1500 actual density data from surface rocks. All in all, this multidisciplinary approach allows us to characterize the western termination of the South Pyrenean Triangle zone as the transition from a ramp-dominated and multiple triangle zone to a detachment-dominated one whose geometry, kinematics, and location were controlled by the distribution and heterogeneity of the Upper Eocene-Lower Oligocene syntectonic d&#233;collements and the southern pinch-out of the basal detachment of this unit.</p>

Anticline

10.5194/egusphere-egu21-3417

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