M. Teresa Teixidó

• PhD
• Resarch and teaching in Applied Geophysics at University of Granada

This study presents the geological and geomorphological characterization of the Pie de la Cuesta landslide, a large (>60 ha) slow-moving (up 4.5 m/month) landslide in Southern Peru. The landslide has been active since 1975 and underwent a significant re-activation in 2016; the mass movement has caused the loss of property and agricultural land and...

Due to the presence of an excessive amount of noise in the data, archeological geophysics frequently produces results that cannot be used to evaluate the content that may exist in the subsurface. If it is impossible to differentiate between signal and noise, excessive noise will result. Its genesis, when it is attributable to heterogeneities in the...

Pie de Cuesta is a large landslide with a planar area of 1 km² located in the Vítor district, in the Arequipa department (Peru), and constitutes an active phenomenon. It belongs to the rotational/translational type, which concerns cases that are very susceptible to reactivation because any change in the water content or removal of the lower part ca...

This work addresses the problem of the lack of perceptibility that geophysical data may have. Data fusion allows us to combine datasets, providing an improved and more informative source of information about structures buried in the ground. After testing different approaches, a strategy was developed using ground-penetrating radar and magnetic data...

The seismicity in the SE Iberian Peninsula is distributed parallel to the coast in a well-developed strike-slip fracture system known as the Eastern Betic Shear Zone (EBSZ). This work focuses on the characterization of the shallow subsurface structure of the Algezares-Casas Nuevas Fault, within the Carrascoy Fault System of the EBSZ. The Carrascoy...

The approach presented in this work uses an interpolation methodology to densify 3D-GPR datasets to sharpen the results obtained in GPR surveys carried out in an archaeological environment. It allows the estimation of missing data from the combined use of mathematical transforms, such as the Fourier and curvelet transforms, and predictive filters....

INT-FFT algorithm presented in this work uses an interpolation methodology to densify 3D-GPR datasets to sharpen images obtained in GPR surveys obtained in an archaeological context. It allows the reconstruction of missing data from the combined use of mathematical transforms (e.g., the Fourier and Curvelet transform) and predictive filters. This t...

The critical zone (CZ) represents the most-shallow subsurface, where the bio-, hydro-, and geospheres interact with anthropogenic activity. To characterize the thickness and lateral variations of the CZ, here we focus on the Eastern Betic Shear Zone (EBSZ), one of the most tectonically active regions in the Iberian Peninsula. Within the EBSZ, the G...

We obtain P-wave receiver functions from teleseismic earthquake recordings at a dense seismic broadband transect, deployed along 170 km across the Betic mountain range in southeastern Spain. Migrated images show the crustal structure of the orogen in detail. In particular, they reveal the situation of the subducted Iberian paleomargin, with full pr...

When an active landslide is first identified in an artificial reservoir, a comprehensive study has to be quickly conducted to analyse the possible hazard that it may represent to such a critical infrastructure. This paper presents the case of the El Arrecife Landslide, located in a slope of the Rules Reservoir (Southern Spain), as an example of geo...

The Central Bransfield Basin shows a chain of submerged volcanic edifices developed along an active segmented back-arc spreading center. Into the BRAVOSEIS (CTM2016-77315-R) amphibious project, in 2019 and 2020, two marine geophysical cruises were carried out onboard the R/V Sarmiento de Gamboa and Hesperides, respectively (Almendros et al., 2020)....

Usually, in ground-penetrating radar (GPR) datasets, the user defines the limits between the useful signal and the noise through standard filtering to isolate the effective signal as much as possible. However, there are true reflections that mask the coherent reflectors that can be considered noise. In archaeological sites these clutter reflections...

Usually, in ground-penetrating radar (GPR) datasets the user defines the limits between the useful signal and the noise through standard filtering to isolate the effective signal as much as possible. However, there are true reflections that mask the coherent reflectors that can be considered noise. In archaeological sites these clutter reflections...

The results of the first phase of the General Research Project are presented in which various archaeological activities have been carried out: geophysical prospecting by magnetometry, remote sensing prospecting by thermal imaging, radiocarbon and thermoluminescence dating, and analysis of ceramic materials and fauna. This preliminary results have s...

Non-destructive techniques are widely used to explore and detect burial remains in archaeological sites. In this study, we present two sets of sensors, aerial and geophysics, that we have combined to analyze a 2 ha sector of ground in the Torreparedones Archaeological Park located in Cordoba, Spain. Aerial platforms were used in a first step to ide...

Over the past decade, high-resolution noninvasive sensors have been widely used in explorations of the first few meters underground at archaeological sites. However, remote sensing actions aimed at the study of structural elements that require a very high resolution are rare. In this study, layer characterization of the floor mosaic substrate of th...

This chapter uses case studies to illustrate the way geophysical techniques are integrated into archaeological approaches. The general idea is to show how the different geophysical models obtained using magnetic, electric, seismic and GPR data, are used in the archaeological praxis and the capacity they have to respond to particular questions.

The study that corresponds to this communication consists in the development and adaptation of geophysical prospecting methodologies for application in Archaeology. Namely for: (a) the geoarchaeological context of sites to be studied; (b) obtaining images of the subsoil with sufficient resolution to represent the spatial distribution of buried stru...

Geophysical survey and laser scanning allows us to define the shape of the Osuna’s roman theater. It is a low cost activity with no impact on the ruins that should serve as a basis for further planning of its future.

In this work the description of the first laboratory tests and modelling tests are performed to develop an inversion scheme capable of reproducing the image of the subsurface that we can obtain from acquired GPR-profiles (or radargrams). This procedure involves modelling synthetic radargrams so as to resemble the best possible to acquired radargram...

The Segeda I site is located in northeastern Spain and holds the remains of an important city mentioned in Roman sources on the conquest of the Iberian Peninsula, particularly the Celtiberian war, from 153 to 133 BC. Recent excavations at this site have revealed a peculiar structure outside the perimeter wall that can be related more to defensive o...

The use of geophysical methods applied to Archaeology, in the exploration of buried structures in the sub-surface, is an imperative need in the previous steps to excavations or archaeological surveys, playing an important role in the delimitation of archaeological sites, making it more effective protective actions archaeological heritage. With rega...

Gravity can be considered an optimal geophysical method for cave detection, give the high density contrast between an empty cavity and the surrounding materials. A number of methods can be used for regional and residual gravity anomaly separation, although they have not been tested in natural scenarios. With the purpose of comparing the different m...

O objectivo deste projectode doutoramento é o estudo e o desenvolvimento de metodologias eficazes de prospecção geofísica aplicadas a diferentes ambientes arqueológicos, cruzando as diversas técnicas geofísicas disponíveis. As técnicas escolhidas para o desenvolvimento do projeto são as mais usadas actualmente em arqueologia: georradar, tomografia...

The set of ETR and GPR used in a limited activity, low cost and no impact on the monument, allowed us to define the outline of the size, design and shape of the Roman theater in Carteia and to propose a simulation of its volume and implementation on the ground.

From the geometrical, sedimentological and petrological characteristics derived from an outcrop and the core and well logging data of 4 boreholes in combination with 5 GPR lines (200 MHz), a 3D model of a layer of sandstone in TIBEM (Triassic of the Iberian Meseta, Spain) has been developed.The selected example corresponds to a meander belt. In it...

Three-dimensional ground-penetrating radar (3D-GPR) is one of the highest resolution geophysical methods for exploring the shallow subsurface and it is widely utilized in the diverse fields requiring this kind of information: for example archaeology, civil engineering and environmental studies. Currently, there are several ways to present 3D-GPR re...

The present study is a pilot magnetic gradient survey inserted in a set of geological and geophysical works that are planned to understand the infilling process of the Portman Bay (Murcia, Spain). In a period of 33 years (from 1957 until 1990) the Portman Bay has been silted up with mine tailings. This mining waste, after being discharged into the...

In the frame of the research conducted to develop efficient strategies for investigation of rock properties and fluids ahead of tunnel excavations the seismic interferometry method was applied to analyze the data acquired in boreholes instrumented with geophone strings. The results obtained confirmed that seismic interferometry provided an improved...

During the Bronze Age, the region of La Mancha Occidental (Spain) was occupied by prehistoric settlements in which the protection of basic resources was a primary concern. The structure of these settlements comprised several concentric walls that surrounded conical mounds around 4–10 m high. The Motilla de la Vega is an unexcavated site next to the...

El yacimiento de la Edad del Bronce de la Motilla del Azuer viene siendo objeto de excavaciones arqueológicas sistemáticas y de intervenciones para su puesta en valor por el Departamento de Prehistoria y Arqueología de la Universidad de Granada durante las últimas décadas. Con el objeto de priorizar los sectores de excavación en futuras campañas se...

Surface geophysical methods have become a useful tool in studies related to mining, geology, environmental impact studies, etc. The objective of this conference is to present the latest developments in shallow geophysical exploration to an audience not versed in these techniques and show you its ability to obtain images of the subsurface.Each metho...

Exploitation of the phosphatic layers in Sidi Chennane deposit (Morocco) collides frequently with problems bound to the existence, in the phosphatic series, of sterile bodies qualified as derangements. Our study shows that these bodies, masked by the Quaternary cover can be mapped using the Time-Domain ElectroMagnetic Soundings (TDEM) and Frequency...

Introduction Geophysical methods are increasingly being used with great success to delineate areas contaminated with potentially harmful elements and compounds, including acidic seepage at industrial landfills and mine waste sites. To monitor or decontaminate affected sites, a complete knowledge of their geology and hydrogeology is necessary, as is...

RÉSUME Au Maroc, de nombreux sites miniers abandonnés au fil des ans, sans l’application d’un plan de fermeture, devraient être restaurés pour réduire les impacts négatifs sur l’environnement: pollution des sols, de l’eau, destruction ou perturbation d’habitats naturels, impact visuel sur le paysage, effets sur le niveau des nappes phréatiques, etc...

The Kettara site (Morocco) is an abandoned pyrrhotite ore mine in a semi-arid environment. The site contains more than 3 million tons of mine waste that were deposited on the surface without concern for environmental consequences. Tailings were stockpiled in a pond, in a dyke, and in piles over an area of approximately 16 ha and have generated acid...

Les rejets sulfurés de la mine abandonnée de Kettara, située à 30 km au Nord-Nord-Ouest de Marrakech, sont directement entreposés sur un substratum schisto-gréseux fracturé. D'une superficie d'environ 16 ha, ils constituent une réelle source de pollution pour l'écosystème local en particulier à cause du Drainage Minier Acide (DMA) vers les eaux de...

Groundwater management needs detailed aquifer characterization, especially in semiarid costal aquifer systems that are under hydrological pressure. Our study area is in the Tordera delta, northeastern coast of Spain, where a detrital fluvio-deltaic aquifer system has been developed above granitic basement. The main purpose of this study is to chara...

In Sidi Chennane deposits (Morocco), the phosphatic series is composed of regular interbedded phosphatic and marly limestone layers. Exploitation of the phosphate in these deposits collides frequently with problems bound to the existence, in this series, of sterile bodies qualified as derangements. They cause two kinds of problems: 1) as they are h...

Understanding and characterizing fault zone structure at depth is vital to predicting the slip behaviour of faults in the brittle crust. The CFZ is a large offset (10s of km) strike-slip fault that constitutes part of the diffuse plate boundary between Africa and Iberia. It has been largely passively exhumed from ca. 4 to 6 km depth. The friable fa...

Understanding and characterizing fault zone structure at depth is vital to predicting the slip behaviour of faults in the brittle crust. We aim to combine detailed field mapping and laboratory velocity/physical property determinations with seismic measurements on the Carboneras fault zone (S.E. Spain) to improve our knowledge of how fault zone stru...

The Zafarraya basin is a Neogene karstic hollow enclosed in the Betic Mountains (southwest Spain). That region suffers the highest seismic hazard in the Iberian Peninsula due to the collision between the Euroasiatic and the African plates. An example of this was the Andalusian earthquake on 24th December 1884, with estimated magnitude 6.8 and epice...

El deslizamiento de Diezma afectó a un volumen superior al millón de m3 de material y cortó la Autovía A-92 a su paso por el paraje conocido como Cortijo de Rías. El drenaje de la zona afectada por el deslizamiento fue una de las principales medidas correctoras para su estabilización. En este trabajo se presentan los resultados de una campaña de ge...

Seismic refraction tomography is an attractive strategy for modeling near surface presenting lateral and vertical gradients and also producing static corrections, where traditional seismic refraction fails. We evaluate a hybrid inversion method that combines a global search with a local optimization method to build the velocity model from first bre...

SUMMARY Near-surface seismic characterization (100 or 200 m) has an important role in hydrogeological and natural hazards studies among others. P-wave seismic methods can provide useful information in those cases where high-frequency signals (>100 Hz) can be generated, transmitted and registered. Favourable near-surface conditions in soft sediments...

Groundwater research and management requires the understanding of the subsurface properties to constrain multiscale heterogeneities. This work presents a multidisciplinary study focused on the characterization of hydrogeological parameters and processes of a porous aquifer system using geophysical methods sensitive to structures, lithologies, and p...

The Baixa Tordera alluvial aquifer system is located in the northeastern Mediterranean coast of Spain. This system is considered as a strategic aquifer for planning the management of regional water resources. Since the 1980s, this area has been the subject of an important tourist and industrial development that has incremented the water demand. The...

Radio-wave velocity measurements in temperate and polythermal glaciers, combined with dielectric mixture formulae by Looyenga or Paren, have been used during the last decade to estimate the water content in temperate ice. We have used a similar mixture formula by Riznichenko, but based on elastic properties of the material, to estimate the water co...

The blind reverse Bajo Segura Fault is located at the eastern extreme of the Trans-Alboran shear zone (Betic Cordillera, southeast Iberian Peninsula). The surface expression of recent activity of this blind ENE–WSW fault is represented by coseismic surface anticlines and growth synclines on both sides of the anticlines. In the synclines, the deform...

Obtaining information at an archaeological site by means of geophysical methods can reduce the need for intensive excavation. This paper addresses the use of seismic methods to reveal details in a non-destructive manner at the archaeological site of Los Millares (Almerı́a, Spain). The seismic refraction method provides information on the low freque...

During two Antarctic summers (1996-1997 and 1997-1998), five seismic refraction and two reflection profiles were acquired on the Johnsons Glacier (Livingston Island, Antarctica) in order to obtain information about the structure of the ice, characteristics of the ice-bed contact and basement topography. An innovative technique has been used for the...

Durante las campañas antárticas de 1996-97 y 1997-98, se realizaron en el glaciar Johnsons (Isla Livingston, Antártida) cinco perfiles sísmicos de refracción (con un total de 2.685 m longitud) y dos perfiles de reflexión (2.980 m longitud) con el objetivo de obtener información sobre el grosor del hielo y la topografía del basamento. En cuanto a la...

During two Antarctic summers (1996-97 and 1997-98), five seismic refraction (2.685 m long) and two reflection profiles (2.980 m long) were acquired on Johnsons Glacier (Livingston Island, Antarctica) in order to obtain information about the structure of the ice, characteristics of the ice-rock contact and the basement topography. Seismic refraction...

The Department of Geodynamic and Geophysics of University of Barcelona, in collaboration with I.A.G. and L.C.C., has developed seismic surveys on Johnsons glacier during 1997- 1998 Antarctic summer. This survey has been carried out inside the Antarctic Research Projects ANT96-0734 and ANT95-0994-C03-02 of the Spanish National Antarctic Plan. 2D ref...