Andrés Pocoví Juan- PhD
- University of Zaragoza
Andrés Pocoví Juan
- PhD
- University of Zaragoza
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Publications (298)
Resumen La ASM puede permitir identificar distintos procesos genéticos o de deformación a partir del análisis del elipsoide de susceptibilidad y comparar con el elipsoide de deformación finita, al menos, en orientación y forma. En rocas sedimentarias es habitual la presencia de una foliación magnética paralela a la laminación sedimentaria (Kmin per...
Presentamos un complejo minero dedicado a la extracción del sílex denominado Botorrita-Monegros, demandado en diferentes momentos de la Prehistoria. Para su documentación se programó una prospección a tres escalas: 1) prospección superficial intensiva para acotar las áreas de interés; 2) ortofotografía y MDE de las zonas de mayor potencial mediante...
In this work we present three magnetic surveys in an intensively exploited agricultural area from Tuscania (Lazio region, Italy) whose soils are derived from volcanic rocks with different degrees of reworking, from weathering of the in situ rocks to sedimentary transport forming extensive piedmont deposits. Magnetic surveys were done with a GSM Ove...
In this work we present three magnetic surveys in an intensively exploited agricultural area from Tuscania (Lazio region, Italy) whose soils are derived from volcanic rocks with different degrees of reworking, from weathering of the in situ rocks to sedimentary transport forming extensive piedmont deposits. Magnetic surveys were done with a GSM Ove...
The interfolding remagnetizations are those acquired between two deformational stages, and they are common in inverted
sedimentary basins. They can be used as a tool to restore the structure at the remagnetization time (Villalaín et al., 2016).
This technique is used in the Central High Atlas (Morocco) in the frame of the CGL2016-77560-C2-P researc...
To deal with magnetic modelling, remanent magnetization as well as susceptibility of the rocks that generate an induced
magnetic field by the interaction with the Earth Magnetic field has to be addressed. In presence of primary and/or secondary
fields, it is essential to consider the total magnetization as the sum of induced and remanent components...
En el subsuelo del barrio de La Almozara (Zaragoza) persisten residuos de la tostación de sulfuros de una antigua planta industrial que finalizó su actividad en la década de 1970. Los residuos generados no fueron retirados y es habitual su aparición en obras y en zonas de parque del barrio. Su aparición en superficie produce la dispersión eólica y...
Una amplia distribución de grietas y otras patologías constructivas afectan al casco urbano de la localidad de Perdiguera (Zaragoza). A partir de la información oral se asume que dicho desarrollo es de aparición reciente y que afecta a la práctica totalidad del casco urbano histórico de la localidad. Las grietas indican tanto movimientos verticales...
El barrio de La Almozara (Zaragoza) nació al amparo del desarrollo de la Industrial Química de Zaragoza. Una de las actividades de esta empresa era la tostación de piritas para la obtención de ácido sulfúrico. Durante casi un siglo de actividad, los residuos producidos fueron utilizados para recrecer motas y elevar topográficamente La Almozara que...
En el yacimiento de La Leandra (La Muela, Zaragoza) afloran unidades miocenas lacustres que incluyen habituales niveles de especial concentración de nódulos de sílex. Éstos han sido explotados durante varios periodos y, dadas las características
climáticas y demográficas, conservan en ocasiones la topografía original desde su explotación. Con el ob...
We introduce a field trip to the southwestern termination of the Pyrenean sole thrust: the Santo Domingo anticline. The field trip is articulated in three main stops with panoramic views. We pursue to emphasize some outstanding characteristics of this structure: (A) the large-scale progressive (laterally angular) unconformity that crops out in its...
A sinkhole collapse on November 10th 2003 affected the Casa Azul from Calatayud, which produced the later building tear down. Many analyses were carried out to identify the affected area, to look for potential solutions and to evaluate the conditioning and triggering collapse factors. Documentation review, years later, can permit to get some consid...
Pyrite roasting wastes coming from a former industry closed in 1979 are still present at the subsoil of La Almozara neighborhood (Zaragoza, Spain). These granular wastes are mainly composed of Fe-and Fe-Ti-oxides, also having high Tl, As, Mo, Cu, Sb, Ag, Pb, and Be content that far exceed the generic reference levels. When these waste materials int...
The Jurassic carbonates of the Central High Atlas (CHA) are affected by a widespread and homogeneous chemical remagnetization. This is an interfolding remagnetization (dated in ca. 100 Ma by comparison with the GAPWP of the African plate) that separates two deformational events; the first one is related to the basinal period in the Atlas (Triassic...
The Atlas system, an ENE-WSW intracontinental chain in the NW of Africa, grew because of the inversion of Mesozoic extensional basins during the Cenozoic convergence between the African and European plates. The Central High Atlas (CHA) is located in the mid-western sector of the chain and is characterized by (i) the presence of an Upper Triassic dé...
New residual magnetic map is presented to help decipher the magnetic imprints in the Central High Atlas (CHA) fold-and-thrust belt. The total intensity map shows a main direction mimicking the N070 trend which features the Atlas range. Detailed structural and paleomagnetic studies performed in the selected area demonstrate that similar shortening f...
Multiple constraints, including poorly known parameters, determine along-strike changes of frontal thrust structures in fold-and-thrust belts. Along the 400 km long, continuous Central Moroccan Atlas belt, structural style shows significant changes, preserving similar figures of shortening. This implies the absence of large-scale vertical-axes rota...
A detailed magnetic survey combined with the study of magnetic properties and spectral analysis in the Tusculum archaeological site (Alban Hills, Italy) indicates the existence of magnetic anomalies (total field and gradient, showing amplitudes up to thousands of nT) resulting from combined geological and archaeological features. In this paper we p...
La caracterización de la fábrica constructiva de edificaciones previa a su restauración o evaluación de estabilidad requiere estudios históricos previos y análisis del estilo constructivo del momento de construcción. En ocasiones dicha información es limitada o requiere ser contrastada por métodos de caracterización directa. En este trabajo se abor...
Desde 2016 se vienen estudiando minas de sílex prehistóricas situadas en la localidad Zaragoza de La Muela, probablemente neolíticas. El núcleo principal se encuentra en las partidas de La Leandra-El Cerro y parecen extenderse por los alrededores en una extensión no menor de 90 ha.
Con objeto de acotar las principales zonas de explotación e identif...
Resumen: En este trabajo se aplica el análisis de la anisotropía de la susceptibilidad magnética (ASM) con la finalidad de ayudar a descifrar la evolución mesozoica y cenozoica de un sector del Alto Atlas Central. El Atlas es la cadena intraplaca más importante del norte de África, resultado de una compleja evolución durante el Mesozoico y Cenozoic...
Resumen: Las cuencas sedimentarias invertidas con un importante apilamiento de sedimentos presentan frecuentemente remagnetizaciones muy intensas y ubicuas que, en la mayoría de los casos, sustituyen la magnetización primaria en áreas muy extensas. El Atlas es una cadena intracontinental generada por la inversión de cuencas extensionales mesozoicas...
Twenty chain-scale cross-sections (between 50 and 100 km long) in the Central High Atlas (between Demnate and Rich, Morocco) considering potential field data and constrained by means of paleomagnetism (paleodips for cross-section reconstruction) and AMS (anisotropy of magnetic susceptibility as an indicator of internal deformation) reveal the inter...
In this work we present the preliminary paleomagnetic results in the framework of an ambitious research project that is being carried out in the Central High Atlas (CHA). The Atlas is an intracontinental chain generated by the inversion of extensional Mesozoic basins due to the convergence between Africa and Europe during the Cenozoic. The deposits...
In this work the analysis of the anisotropy of magnetic susceptibility (AMS) has been applied to decipher the Mesozoic and Cenozoic evolution of the Central High Atlas. The Atlas is the most important intraplate mountain range in North Africa, resulting from a complex evolution during the Mesozoic and the Cenozoic. Its evolution during the Mesozoic...
Contexto geológico y ambiental Autores: Pueyo Anchuela, Ó.; Revuelto, C.; Ramajo, J.; Bartolomé, J.I.; Arce, M., López, P. L.; Gracia, J.; Blecua, A.; Moncayola, J.A.; Pocoví, A.; Mihi, E.; Sánchez, J.; Franco, M.; Blas, A.; Gil, H. y Jiménez, G.
In the central Ebro Basin, solution of Neogene evaporites creates mantled karst on the Quaternary alluvial deposits. Karst has been active at least since Early Pleistocene, as remains of deformation paleostructures prove, being a very active process at present. Sediments involved in paleodolines helps to determine its geometry, genetic processes an...
Structural analysis and Anisotropy of Magnetic Susceptibility are here applied to the fault zone (several hundreds of meters thick) associated with an E-W striking, 20 km-long segment of the Vallès-Penedès Fault (Catalan Coastal Ranges). The results obtained indicate a complex structure, mainly resulting from the imprint of Paleogene compressional...
Introducción Las tasas de actividad y subsidencia en el entorno del sector central de la Cuenca del Ebro asociadas a la disolución de materiales evaporíticos son ampliamente conocidas (ver por ejemplo Simón et al., 2009). Considerando que la prevención y ordenación del territorio es el mayor factor de éxito en minimizar las afec-ciones, la presenci...
The stability of embankment dams without an impermeable core depends on the characteristics of the face slab that prevents internal erosion, piping and eventual collapse of the structure. Under a Mediterranean climate, the impermeable asphaltic face slab is subjected to high solar radiation and consequent temperature changes, which can generate the...
El proyecto de presa de Enciso en el valle del Cidacos es ya una realidad: 100 metros de pared de hormigón (94
metros desde el cauce, 105 metros sobre cimientos) que se alzan amenazadores sobre Enciso para retener 37 Hm3 (tres cuartas partes del volumen anual del río). Lejos de aportar soluciones para el desarrollo del alto Cidacos, la presa, tal c...
Evaluation of karst hazards benefits from the integration of different techniques, methodologies and approaches. Each one presents a different signature and is sensitive to certain indicators related to karst hazards. In some cases, detailed analysis permits the evaluation of representativeness either from isolated approaches or by means of integra...
The logic correlation between the increase of water availability and the increase of karst solution can be generalized at contexts where the soluble materials are located below the water level. Alluvial saturated
thickness upwards of Zaragoza city, where wide areas are submitted to a mantled karstic evaporitic process, is evaluated in order to deci...
Dispersion of pollutants from mining areas can result in risks to human health. The dynamic interaction of
geological processes can generate complex situations that favor enrichment in toxic elements by sedimentary and diagenetic mechanisms. In order to explore the distribution of iron-rich minerals in coastal and river sediments, a geophysical cam...
Population settlement studies from a certain area are based in the analysis of their documentary remains, the imprint in the landscape or by their constructions. The persistence of these evidences is related to cultural and climatic factors and the natural resources available in the settlement areas. In this work, an analysis of the available natur...
ABSTRACT
At retrofitting of buildings or at building damages analysis, the identification of footing characteristics is of high interest. The application of GPR for determining the size, depth and characteristics of footing is usual, due
to the non-invasive character of this technique, the possibility to be performed at urban environments and the r...
ABSTRACT
During February/March 2015 an important flood affected several sectors in the central zone of the Ebro middle course. Scientific evaluation was clear, the flood plains are often flooded, the periodicity of events such as the one in 2015 is high and similar discharges produce higher water levels in urban domains. However, the citizen percep...
La formación de cavidades y su posterior colapso genera distintos tipos de dolinas en superficie. La evaluación de los riesgos asociados al karst aluvial o cubierto varía respecto la percepción habitual por encontrarse su origen desde varios a decenas de metros de profundidad. Las dolinas no son estáticas; en su desarrollo influye tanto la continui...
Karst hazards in the central Ebro Basin are related to subsidence and collapses owing to evaporitic rocks located several tens of metres below the surface. In this type of karst (mantle karst) cavities propagate upwards through a non-soluble rock, in this case Quaternary alluvial deposits. The typical geological series comprises a heterogeneous all...
The low contrast in physical properties of archaeological elements compared to the host soil is a common drawback in geophysical surveys applied to subtle archaeological sites because those contrasts are usually what are being measured by most instruments. Furthermore, when archaeological elements and construction remains are placed within the same...
Los embalses de Enciso (en el río Cidacos) y Terroba (río Leza) son ejemplos muy interesantes de lo que puede aportar la geología a las cuestiones ambientales y de cómo se podrían evitar los riesgos (y los gastos asociados a los mismos) con un poco de planificación y de sentido común. Además, desde el ámbito de la ingeniería civil se debería recono...
El recorrido de este itinerario, se desarrollará por dos unidades geológicas netamente diferenciadas: por el denominado Sistema Ibérico (en donde se iniciará) y por la Depresión Geológica del Ebro (en donde finalizara). Así, el recorrido del presente itinerario se iniciará en el paraje de los Estrechos, dentro de la Rama Aragonesa del Sistema Ibéri...
El recorrido de este itinerario, se desarrollará íntegramente por una sola unidad geológica, por la Depresión Geológica del Ebro (en donde se iniciará y en donde finalizara el recorrido). Así, el recorrido del presente itinerario se iniciará en las inmediaciones de Hijar, dentro de la unidad geológica antes mencionada, para finalizar en las cercaní...
En esta comunicación, nos centraremos fundamentalmente en el patrimonio minero generado en las antiguas explotaciones mineras; y también en la minería actual e histórica de esta comarca, una de las más activas de Aragón, y también del conjunto de la Depresión Geológica del Ebro.
El recorrido de este itinerario, se desarrollará íntegramente por una sola unidad geológica, por la Depresión Geológica del Ebro (en donde se iniciará y en donde finalizara el recorrido). Así, el recorrido del presente itinerario se iniciará en las inmediaciones de Vinaceite, dentro de la unidad geológica antes mencionada, para finalizar en las cer...
Ground penetrating radar surveys (GPR) present numerous application fields due to its high resolution and depth range depending upon the used central frequency antennas. Both penetration and resolution permits the study at scales between milimetric to decametric range. The evaluation of research objectives permits the choosing of high to low freque...
Recorregut realitzat el 17 de novembre de 2013. També en aquesta ocasió, el recorregut del present itinerari discorrerà per una zona en la qual conflueixen tres unitats geològiques netament diferenciades: la Depressió Geològica de l´Ebre, la Serralada Prelitoral Catalana (del Sistema Mediterrani), i la Serralada Ibèrica. Així, en el primer tram del...
Recorregut realitzat el 16 de novembre de 2013 [1]. En aquesta ocasió, el recorregut del present itinerari discorrerà per una zona en la qual conflueixen tres unitats geològiques netament diferenciades: la Depressió Geològica de l´Ebre, la Serralada Prelitoral Catalana (del Sistema Mediterrani), i la Serralada Ibèrica. Així, en els primers trams de...
Recorregut realitzat el 17 de novembre de 2013. En aquesta ocasió, el recorregut del present itinerari discorrerà per una zona en la qual conflueixen tres unitats geològiques netament diferenciades: la Depressió Geològica de l´Ebre, la Serralada Prelitoral Catalana (del Sistema Mediterrani), i la Serralada Ibèrica. Així, cap els voltants de Beseit...
Recorregut realitzat el 16 de novembre de 2013. En aquesta ocasió, el recorregut del present itinerari discorrerà per una zona en la qual conflueixen tres unitats geològiques netament diferenciades: la Depressió Geològica de l´Ebre, la Serralada Prelitoral Catalana (del Sistema Mediterrani), i la Serralada Ibèrica. Així, cap els voltants de Beseit...
En esta ocasión se realizará un itinerario localizado en un área totalmente situada en la comarca del Bajo Aragón, desde principio a fin, entre las localidades de la Mata de los Olmos, los Olmos, Alcorisa, Calanda y Alcañíz (la capital administrativa de esta comarca). Por otra parte, el recorrido se centrará en un principio en el Sistema Ibérico (e...
En esta ocasión se realizará un itinerario localizado en un área muy pequeña, pero con unas connotaciones muy especiales: se trata de un recorrido por una cuenca lignitífera, por la Cuenca Lignitífera de Mequinenza. Ésta, como es conocido, se halla en la Depresión Geológica del Ebro, repartiéndose entre varias comarcas de Cataluña y de Aragón. Así...
En esta ocasión se realizará un itinerario localizado en un área totalmente situada en la comarca del Bajo Aragón, desde principio a fin, entre las localidades de Seno y Alcorisa, pasando además por los municipios de Aguaviva, Foz Calanda y la Ginebrosa (en este caso, muy tangencialmente). Por otra parte, el recorrido se centrará en su totalidad en...
En esta ocasión se realizará un itinerario localizado en un área totalmente situada en la comarca del Bajo Aragón, desde principio a fin, entre las localidades de Aguaviva, la Ginebrosa, la Cañada de Verichs, la Codoñera, Torrecilla de Alcañiz y Alcañíz, finalizando dentro del término de este municipio en Puigmoreno. Por otra parte, el recorrido se...
At mantle/cover evaporite karst settings, evidences of surficial subsidence are usually strongly dependent on geomechanical properties and spatial inhomogeneities within the cover series. In infrastructure assets, affected by karst processes, the evaluation of mitigation or engineering solutions requires a 3D reconstruction of the underground, kars...
En este caso, el presente itinerario se desarrollará totalmente en la denominada Rama Aragonesa de la Cordillera Ibérica (que ya no se abandonará). En este tramo se irán encontrando afloramientos de los materiales mesozoicos (del Triásico, del Jurásico y del Cretácico). Más concretamente, se realizará en por la denominada Cuenca del Maestrazgo, sie...
En esta ocasión se realizará un itinerario localizado en un área totalmente situada dentro la comarca aragonesa y zaragozana del Aranda, desde principio a fin, entre las localidades de Viver de la Sierra y Tierga, pasando además por los municipios de Brea de Aragón e Illueca. Por otra parte, el recorrido se centrará en su totalidad en el Sistema Ib...
En esta ocasión se realizará un itinerario localizado en un área totalmente situada dentro la comarca aragonesa y zaragozana del Aranda, desde principio a fin, entre las localidades de Brea de Aragón y Aranda del Moncayo, pasando además por los municipios de de Illueca, Gotor y Jarque. Por otra parte, el recorrido se centrará en su totalidad en el...
En esta ocasión se realizará un itinerario localizado en un área totalmente situada dentro la comarca aragonesa y zaragozana del Aranda, desde principio a fin, entre las localidades de Mesones y Purujosa, pasando además por los municipios de de Tierga, Trasobares y Calcena. Por otra parte, el recorrido se centrará en su totalidad en el Sistema Ibér...
Mantle karst environments can be analyzed bymeans of historical, geophysical and geomechanical approacheswith the objectives of avoiding urban development in hazardous areas or to establish guidelines for foundation design. Nevertheless, geophysical and geomorphological techniques can show complexities in interpretation in urban domains. In order t...
The Central Ebro Basin exhibits a wide potential in the mining of alabaster nodules. Their sedimentary and diagenetic origin makes difficult the resources evaluation from conventional surficial analyses. In this work, the application of electromagnetic geophysical techniques in the identification of such nodules is evaluated at different mining sta...
The propagation of solution cavities located below alluvial deposits produce surficial evidences that, in some cases, cannot be representative of their actual extension at depth. Cavity propagation through heterogeneous media, for example with interbedded cemented levels, can produce changes in the
propagation of deformation producing the identific...
Assumptions of simple geometries for alluvial deposits (related to main rivers) can preclude determination of complexities that are revealed as fundamental controls in underground flow. Although subhorizontal contacts between alluvial and substratum materials are expected, previous
sedimentary or erosional processes can result in irregular geometri...
Mantle karst environments can be analyzed by means of historical, geophysical and geomechanical approaches with the objectives of avoiding urban development in hazardous areas or to establish guidelines for foundation design. Nevertheless, geophysical and geomorphological techniques can show complexities in interpretation in urban domains. In order...
Anisotropy of Magnetic susceptibility (AMS) has been traditionally used as an indirect approach for the characterization of mineral preferred orientation and rock petrofabric. In the Southern Central Pyrenees, a robust data set of magnetic fabrics covering a wide range of ages, structural context, and lithologies has been used for an assessment at...
Paleomagnetic studies have been conducted in the Pyrenees (and in its foreland basins) since the earlier sixties and have continued duringthe next decades, particularly increasing in the nineties. At the moment, the research interest is still growing as regards of the increasing in number of publications. This vast amount of data is due to several...
The Central Ebro Basin is the southern Pyrenean foreland basin ; endorheic sedimentation allowed precipitation of evaporites during Cenozoic times and solution of evaporites underlying the alluvial Quaternary sediments favors the present-day development of mantle karst. In urban areas, collapse sinkholes and subsidence can affect infrastructures, a...
In the Western Central-Pyrenees numerous investigations during the past years have yielded an exceptional high density of localities (more than 700 sites) where the AMS and rock magnetic properties have been determined. This unique AMS dataset helps in understanding the orogenic evolution of the Pyrenees and its foreland basins. Processes related t...
In this work we present an analysis of the applicability of ground penetrating radar (GPR) to karstic hazard evaluation in urban areas by means of several case studies. The main objective is to characterize the origin of pathologies in buildings and other facilities, and of subsidence processes, and to identify their causative phenomena in the subs...
During Early, as proposed by the International commission on stratigraphy Pleistocene times, interacting fluvial and aeolian processes constructed wide alluvial plains over an evaporite-dominated Miocene substratum in the central Ebro Basin. An exceptional site where these deposits show faults, folds, diapirs, karst structures and unconformities ha...
The faults chosen for this study belong to the Iberian Chain (Northeastern Iberian Plate) and include two kine-matically different kinds of structures (thrusts and strike-slip), with well-developed fault gouges several tens or hundreds of meters thick (Datos Fault System and Daroca Fault) and thinner clayey layers linked to thrust surfaces (Cameros...
An integrated analysis was carried out in a selected quarry of the oldest terrace of the Ebro River, where a wide gravel unit characterized by large-scale cross bedding outcrops. This unit has been interpreted as a lake with marginal deltas. Previous sedimentological studies have pointed out that braided rivers dominated in the area during the Earl...
Subsidence processes commonly imply volume reduction of an underground unit. This reduction can be due to constructive imperfections, filling consolidation, evaporitic solution or collapses of silty units. In many cases, the surficial evidences -pathologies- allow the identification of their origin even though they are contingent on the material rh...
Active karst processes in urban settings can represent a significative hazard for the population and to buildings and other facilities. In this work, an integrated analysis by means of geophysical survey, surficial analysis and geomechanical tests is presented. The obtained results permit to identify a collapsed geometry where the more sudden hazar...
A detailed stratigraphic study based on the igneous outcrops located in the Tramuntana chain (Mallorca, Spain) and the observed magma-sediment interaction structures, show a main magmatic unit emplaced within Carnian-Norian sediments (in Keuper facies) which share common lithostratigraphic features with contemporary outcrops located on the NW margi...
We have carried out a complete study of the Upper-Triassic alkaline magmatism on the northwestern margin of the Iberian Chain. This magmatism is composed of mafic sills, which intrude the Keuper facies in two geographic sectors: the Cameros Massif (NW) and the Moncayo Massif (SE). In both of these sectors, the rocks are characterised by an intense...
