Luis Barbero

Universidad de Cádiz | UCA · Faculty of Sea and Environmental Sciences

Salt marshes are one of the most productive ecosystems and provide numerous ecosystem services. However, they are seriously threatened by human activities and sea level rise. One of the main characteristics of this environment is the distribution of specialized plant species. The environmental conditions governing the distribution of this vegetatio...

Novel data-acquisition technologies have revolutionized the study of natural systems, allowing the massive collection of information in situ and remotely. Merging these technologies improves the understanding of complex hydrological interactions, such as those of wetland–aquifer systems, and facilitates their conservation and management. This paper...

In hydrogeological research, the systematic and periodic measurement of the piezometric level is fundamental to assess aquifer storage, identify recharge and discharge areas, define flow directions and to infer the balance between inputs and withdrawals. Furthermore, knowledge of this variable and its fluctuations is essential for the efficient man...

Uncrewed Aerial Systems (UAS) and satellites are used for monitoring and assessing the quality of surface waters. Combining both sensors in a joint tool may scale local water quality retrieval models to regional and global scales by translating UAS-based models to satellite imagery. The main objective of this study is to examine whether Sentinel-2...

Salt marshes are very valuable and threatened ecosystems, and are challenging to study due to their difficulty of access and the alterable nature of their soft soil. Remote sensing methods in unmanned aerial vehicles (UAVs) offer a great opportunity to improve our knowledge in this type of complex habitat. However, further analysis of UAV technolog...

Few studies have assessed mining-associated water pollution using spectral characteristics. We used high-resolution multispectral data acquired by unmanned aerial drones combined with in situ chemical data to assess water quality parameters in 12 relatively small water bodies located in the Tharsis complex, an abandoned mining area in the Iberian p...

We are celebrating the 10th anniversary of the Cadiz Geolodays, dedicating this edition to show various aspects of the geology of our capital. We begin with an introductory lecture about the geological setting and its evolution. After, at different stops a walk will take us to the few outcrops of the rocky substrate on which the city is located. Th...

In less than two decades, UASs (unmanned aerial systems) have revolutionized the field of hydrology, bridging the gap between traditional satellite observations and ground-based measurements and allowing the limitations of manned aircraft to be overcome. With unparalleled spatial and temporal resolutions and product-tailoring possibilities, UAS are...

The present paper deals with the historical evolution of the northern Bay of Cádiz (SW Spain) between the last eustatic maximum (6.5 ka BP) and the present day, by means of a series of independent proxies. The zone is constituted by the tidal estuary of the Guadalete River, filled with saltmarsh sediments during the late Holocene, due to the shelte...

Field video-guide for the "Geolodía Cadiz 2020". A geological field trip video-guide to show the geological point of interest in the dawntown of Cadiz

Las nuevas tecnologías han revolucionado la adquisición de datos del medio natural, tanto espacial como temporalmente, al proporcionar herramientas para su recolección masiva. Esto puede representar una dificultad añadida, al sobredimensionar las bases de datos específicos y dar mayor complejidad al procesamiento, pero sin duda, contribuye notablem...

Los drones han alcanzado en los últimos años gran popularidad. El cambio en la normativa actual abre más posibilidades para usarlos en diferentes campos. Investigamos sobre métodos para reducir el tiempo de entrenamiento o para seleccionar a los sujetos con mayores habilidades para dichos entrenamientos. El hecho de usar una emisora, que es muy par...

Hasta hace pocos años, los Drones habían estado limitados al ámbito militar sin embargo, hoy en día las mejoras tecnológicas, han conseguido que los pequeños vehículos aéreos de bajo coste permitan a los civiles trabajar y llevar a cabo experimentos con Drones reales. Muchas son las investigaciones que en estos últimos años han proliferado respecto...

Numerous biogeochemical studies in the Southern Ocean have focused on the importance of trace metals in controlling primary production (e.g. Fe, Co) or as potentially toxic to the ecosystem (e.g. Ag, Cd). However, the reasons why Fe limitation is prevalent in the Southern Ocean or the concentrations of non-biogenic elements in surface waters are hi...

The increasing pressures and hazards derived from human actionand climate change make the implementation of coastal monitoringplans a requirement for assessing coastal responses and evolution.For this reason, this work aims to use unmanned aerial systems (UAS)in combination with Structure from Motion algorithms for detectingmorphodynamic changes ca...

Wetlands are sensitive and complex systems whose conservation is a priority. For the correct understanding of their hydrological dynamics, it is necessary to determine the different elements of the water budget and, in particular, the geometry of the wetland basin in order to estimate the variations in storage capacity. This paper presents a novel,...

En el presente trabajo se describen las actuaciones dirigidas a la implementación y utilización con fines docentes de un laboratorio natural de Hidrogeología junto al Campus de Puerto Real de la Universidad de Cádiz, en el Parque Metropolitano Marisma de Los Toruños y Pinar de La Algaida. Esta zona protegida se encuentra a su vez ubicada dentro del...

Understanding how radon escapes from minerals is important for many fields in Earth science, yet few studies have focused on the mechanisms for radon escape. We measured radon emanation rate and radon loss upon heating for crushed aliquots of three large zircon crystals from three localities: Mud Tank (Australia), Bancroft (Canada), and Malawi (Afr...

The Cantabrian Mountains extend along the Atlantic coast of northern Spain and are known to have experienced an Alpine phase of deformation, reactivating well-expressed Variscan structures. They form the westward continuation of the Pyrenean range and were similarly uplifted consequently to the convergence between the Iberian and European plates. N...

Results of ultrafiltration experiments performed in acid waters from the Río Tinto acid mine drainage system in order to evaluate the role of colloids under acid mine drainage conditions indicate that for U and Th, a constant permeation model is applicable and does produce results that are compatible with the predicted behavior of these elements un...

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The activity ratios of (234)U/(238)U were used to investigate processes of subterranean groundwater discharge into coastal marine waters in a study location at Bay of Cádiz (southwest Spain). Marine waters in the bay and surrounding open ocean exhibited U concentrations of 3.4 ± 0.1 μg/L and activity ratios of 1.15 ± 0.01, in agreement with the exp...

The distribution pattern of diagenetic conditions to very low-grade metamorphism in the eastern Rif has been determined based on a study of clay-mineral assemblages and illite crystallinity of Mesozoic metapelites. Lowgrade conditions were reached in marbles and also in the Beni-Malek serpentinites, as suggested by the mineral assemblages present i...

Apatite fission-track (AFT) ages from the Iberian Massif, along the northern coastal region in Galicia are presented. The study aims at unravelling the exhumation history of this higher topography coastal region, the so-called Rías Altas region, next to the northern Iberian margin. The rough topography region is bound to the south by the WNW-ESE tr...

Apatite fission-track (AFT) ages from the Iberian Massif, along the northern coastal region in Galicia are presented. The study aims at unravelling the exhumation history of this higher topography coastal region, the so-called Rías Altas region, next to the northern Iberian margin. The rough topography region is bound to the south by the WNW-ESE tr...

The lateral termination of the Alpine-Pyrenean Orogen relief onshore is located in the NW Iberian Peninsula. It overlies a Variscan basement (Iberian Massif), where the sedimentary record of the Alpine tectonic is very scarce. Thus, the characterisation of the tectonic evolution of the lateral termination is difficult and timing and geometries of t...

Resumen: La Cordillera Cantábrica se sitúa en el borde norte de la Península Ibérica y fue originada como consecuencia de la convergencia entre las placas Ibérica y Europea durante la orogenia Alpina. La creación del relieve en su sector central asturiano responde fundamentalmente al levantamiento tectónico del antiguo basamento Varisco a favor de...

In order to investigate the radiological hazard of naturally occurring radioactive material (NORM) and man-made (137)Cs radionuclide in the Bay of Cádiz, 149 samples of sediments have been analysed. Activity concentration in all the samples was determined using a HPGe detection system. Activity concentrations values of (226)Ra, (232)Th, (40)K and (...

Terra Nova, 23, 257–263, 2011AbstractNew apatite (U-Th)/He and fission-track data from the Nevado–Filábride complex in the Sierra Nevada of southern Spain are used to constrain the Neogene exhumation history. Apatite (U-Th)/He ages are close to fission-track ages in western Sierra Nevada indicating that rapid cooling occurred at 8–6 Ma, consistent...

Radioactivity levels in aquatic environments can be assessed through the study of superficial sediments. Anthropogenic activities may alter radioactivity levels leading to the anomalous accumulation of natural radionuclides in coastal areas. In this work, marine sediments from a significant area subjected to severe industrial development were colle...

The Pyrenean-Cantabrian orogen has evolved in response to convergence between Iberia and Europe since the late Cretaceous. As a consequence, the Cantabrian Mountains, which record extensive Variscan deformation and a period of crustal extension in Mesozoic times, were reactivated during the Cenozoic. The most common interpretation is that north-ver...

This work represents an initial attempt to link the evolution of the topography in relation to the general tectonic framework of western Morocco. For this purpose, in a section of the Western Moroccan Meseta different tools are combined in order to attain the general objective. Apatite fission-track (AFT) data of granitic rocks of the Rabat–Khenifr...

We present the first fission-track (FT) thermochronology results for the NW Zagros Belt (SW Iran) in order to identify denudation episodes that occurred during the protracted Zagros orogeny. Samples were collected from the two main detrital successions of the NW Zagros foreland basin: the Palaeocene–early Eocene Amiran–Kashkan succession and the Mi...

The techniques for the direct measurement of the sedimentation rate are reliable but slow and imprecise, given that the time intervals of measurement cannot be very long. Consequently it is an extremely laborious task to obtain a representative map of the sedimentation rates and such maps are available for very few zones. However, for most environm...

In a section of the Western Moroccan Meseta different tools are combined in order to link the evolution of the topography to the general tectonic framework of western Morocco. Apatite fission track (AFT) data of granitic rocks of the Rabat - Khenifra area give ages around 200 Ma with track length distributions which are compatible with the thermal...

Previous apatite and zircon fission track ages of the Nevado-Filábride Complex support rapid cooling from 300°C at 12 to 8 Ma (Johnson et al., 1997). However, apatite fission track ages from the western end of the complex are less than 5 Ma, implying that it experienced significant cooling/denudation during the Neogene that was linked to both the m...

A new method using the inventory determined for the activity of the radionuclide (137)Cs, coming from global radioactive fallout has been utilised to calculate the sedimentation rates. The method has been applied in a wide intertidal region in the Bay of Cádiz Natural Park (SW Spain). The sedimentation rates estimated by the (137)Cs inventory metho...

The Cameros Basin (NW of the Iberian Range, NE of the Iberian Peninsula) was an intracontinental basin during Mesozoic times, which was inverted during Alpine compression. Its formation was due to a main rifting stage during Thithonian-Albian times related with an extensional period due to the opening of the Bay of Biscay. This extensional period i...

The Sierra de Cameros is an intracontinental orogen and represents the north-western part of the Iberian Range in Northern Spain. It comprises a thick sequence of syn-rift continental sediments (mainly sandstones and carbonates) deposited during lower Cretaceous times. A unique characteristic of the Sierra de Cameros in relation to the rest of the...

We present new fission-track and (U-Th)/He data from apatite and zircon in order to reconstruct the exhumation of the Sierra de Cameros, in the northwestern part of Iberian Range, Spain. Zircon fission-track ages from samples from the depocentre of the basin were reset during the metamorphic peak at approximately 100 Ma. Detrital apatites from the...

In this work we have determine the characteristic of low grade metamorphism in metapelites from Temsamane and Ketama Units from the eastern Rif and the mineralogical assemblages of serpentinites of peridotites from Beni-Malek. The Tánger-Ketama unit has an estratigraphic sequence from the Lower Jurassic to the Cenozoic and it is composed by metapel...

Link to map and text: http://info.igme.es/cartografiadigital/geologica/Magna50Hoja.aspx?language=es&id=656

Link to map and text: http://info.igme.es/cartografiadigital/geologica/Magna50Hoja.aspx?language=es&id=658

Modelling of the apatite fission-track data contributes to new information about the tectonothermal evolution of the NW Iberian Peninsula. We have sampled the three main morphotectonic blocks (Cantabrian Range Ancares, Galaico-Leoneses Mountains and Rías Bajas-Terra Chá Plains). The tectonothermal history observed in the AFT models begins with the...

U–Pb SHRIMP ages obtained in zircons from the Sotosalbos and Toledo anatectic complexes in Central Spain give new constraints to the evolution of the inner part of the Hercynian Iberian belt. Pre- Hercynian ages in zircons from the Sotosalbos complex (~464 Ma) are well preserved and reveal that an age diversity of the Lower Paleozoic magmatism in t...

Resumen: La semiventana de Beni-Malek permite proponer que el autóctono relativo de la Unidad metamórfica de Tánger-Ketama son las unidades de Temsamane. En el cabalgamiento principal se encuentran las peridotitas de Beni-Malek, un cuerpo de peridotitas serpentinizadas que se dispone sobre unos 5 a 10 metros de mármoles miloníticos con una lineació...

Resumen: Se han determinado las edades de huellas de fisión y las longitudes de huellas confinadas en apatitos procedentes de granitoides de la Meseta Oeste Marroquí con el objeto de reconstruir su historia termal desde el momento de su emplazamiento hasta la actualidad. Los resultados obtenidos muestran que el bloque completo ha seguido una histor...

El acuífero de Sotogrande, con una superficie de unos 30 km2, está situado en el litoral mediterráneo de la provincia de Cádiz, cerca del límite con la provincia de Málaga. Se trata de un acuífero detrítico costero enclavado en una comarca cuya principal actividad económica es la turística, orientada a un sector de población de alto poder adquisiti...

Recent field work and review of radiometric data obtained from Neogene lavas and plutonic rocks exposed in the Eastern Central Patagonian Cordillera (46–48ºS), which overlie subducted segments of the South Chile Ridge, suggest important Late Miocene to Pleistocene morphological changes in relation to base level variations and/or tectonic events. We...

Apatite fission track (AFT) and (U–Th)/He data from the High Atlas have been obtained for the first time to constrain the tectono-thermal evolution of the central part of the chain. Results from Palaeozoic basement massifs indicate long residence at low temperatures, consistently with their original location out of the deepest Mesozoic rift troughs...

We discuss recent developments on the geodynamics of the High and Middle Atlas of Morocco, two high-topography mountain belts developed within the African plate. The NE-trending Middle Atlas and the nearly E-trending High Atlas derived from inversion of an orthogonal and an oblique rift respectively, both essentially Jurassic in age. NNW-SSE-direct...

Apatite fission-track analysis was applied to Triassic and Cretaceous sediments from the South-Iberian Continental Margin to unravel its thermal history. Apatite fission-track age populations from Triassic samples indicate partial annealing and point to a maximum temperature of around 100–110 °C during their post-depositional evolution. In certain...

The Northwest of the Iberian Peninsula is characterised by the absence of Mesozoic sedimentary deposits, the Cenozoic sediments being scarce. Due to that, the chronology of the geological events in the area is difficult to establish. Nevertheless, in the absence of deposits during a certain time span, the thermal history a particular area during th...

Combined lead, sulphur and oxygen isotopes have been analysed in ore (galena and sphalerite) and associated (quartz, barite) minerals from the Mazarambroz Pb-Zn mineralization. Lead isotopic model ages in galenas cluster around 121 ± 8 Ma in good agreement with previously suggested mesozoic age of this Pb-Zn mineralization estimated by apatite fiss...

In the Montes de Toledo area, located in the axial part of the Central Hercynian zone, a long-term thermo-tectonic evolution can be deduced from apatite fission-track (AFT) data in conjunction with tight geological constraints derived from the knowledge of regional geology and other independent chronometers. The area is composed of two different bl...

Anisotropy of magnetic susceptibility data are presented for samples from the anatectic complex of Toledo and the Mora batholith. The units located at the axial part of the Central Hercynian belt are separated by an important listric fault. Anatectic granites (Layos granite), epizonal granites (Mora granite) and, to a lesser extent, high-grade meta...

Accessory minerals are thought to play a key role in controlling the behaviour of certain trace elements such as REE, Y, Zr, Th and U during crustal melting processes under high-grade metamorphic conditions. Although this is probably the case at middle crustal levels, when a comparison is made with granulite-facies lower crustal levels, differences...

Alpha-recoil tracks (ART) are lattice defects caused by the a-decay of 238 U, 235 U, 232 Th, and daughter products. Visualization of etched ARTs in dark mica by phase-contrast microscopy allows dating of Quaternary geological as well as archaeological materials. Visualization of etched ARTs by Nomarski-differential-interference-contrast mi-croscopy...