Detection of underground cavities by combining gravity, magnetic and ground penetrating radar surveys: a case study from the Zaragoza area, NE Spain

Mochales, Tania; Sáinz, Antonio María Casas; Pueyo, Emilio L.; Pueyo, Óscar; Román, M. T.; Pocoví, A.; Soriano, María Asunción; Ansón, Diego

doi:10.1007/s00254-007-0733-7

Cited by 108 publications

(47 citation statements)

References 29 publications

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“…This filling contains ferromagnetic elements, showing higher values of magnetic susceptibility than local natural materials. The presence of urban debris at surface overlying previous historical collapses confirms this interpretation (see for example Mochales et al, 2008).…”

Section: Integrated Evaluationsupporting

confidence: 69%

Integrated approach for sinkhole evaluation and evolution prediction in the Central Ebro Basin (NE Spain)

Anchuela¹,

Juan²,

Sainz³

et al. 2017

IJS

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Abstract: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 integrated analyses.In this study, we present the evaluation of an area with high density of karstic collapses at different evolutionary stages through the integration of surficial, historical, geomorphological and geophysical data in order to finally define the evolutionary model for karst activity development. The obtained dataset permits to identify different steps in sinkhole evolution: (i) cavities and open sinkholes, (ii) filling of these cavities, with materials having different signatures, (iii) the progression from collapses to subsidence sinkholes and (iv) enlargement through collapses in marginal areas of previous sinkholes. The presence of different stages of this evolutionary model permits to determine their own signatures that can be of application in contexts where analysis cannot be so systematic and also to evaluate the definition of the marginal areas of previous sinkholes as the most hazardous sectors.

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Section: Integrated Evaluationsupporting

confidence: 69%

Integrated approach for sinkhole evaluation and evolution prediction in the Central Ebro Basin (NE Spain)

Anchuela¹,

Juan²,

Sainz³

et al. 2017

IJS

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“…In scientific literature, many papers report on the successful application of geophysical prospecting for the detection of natural cavities: Gibson et al (2004), Leucci et al (2004), Mochales et al (2008), Kaufmann et al (2011), Gambetta et al (2011), Gó mez-Ortiz and Martín-Crespo (2012) and Pueyo Anchuela et al (2013). This is probably because natural cavities are often isolated, with a high contrast between their physical parameters and those of the host material.…”

Section: Introductionmentioning

confidence: 99%

Integrated Analysis of Geological and Geophysical Data for the Detection of Man-made Underground Caves in an area in Southern Italy

Negri¹,

Margiotta²,

Quarta³

et al. 2015

JCKS

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In Cutrofiano, in the southern part of the Salento Peninsula, Apulia, Italy, a Pleistocene calcarenitic sequence was quarried by digging extensive networks of galleries along the geological succession most suitable for the quarrying activity. These caves represent a potential hazard for the built-up environment due to the occurrence of underground instability that may propagate upward and eventually reach the surface, causing sinkholes. In this work we propose integrated interdisciplinary methods for cavities detection. The methodology was applied at a test area located along a major road near Cutrofiano using geological and electrical-resistivity tomography and microgravity geophysical methods.

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“…The idea behind most of these geophysical methods is a material property of the void that is significantly different from the surrounding host rock and thus makes a material contrast. This material contrast can then be detected using a specific geophysical technique (e.g., Butler, 1984;Gibson et al, 2004;El-Qady et al, 2005;Dobecki and Upchurch, 2006;Nyquist et al, 2007;Mochales et al, 2008;Margiotta et al, 2012;Putiška et al, 2012a). Among some of the most frequently used geophysical techniques, electrical-resistivity tomography and microgravity can be mentioned, but additional methods can provide very useful information as well.…”

Section: Introductionmentioning

confidence: 99%

Integrated Geophysical and Geological Investiga-tions of Karst Structures in Komberek, Slovakia

Putiška¹,

Kušnirák²,

Dostál³

et al. 2014

JCKS

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A complex of geophysical methods were used to investigate a small karst area aimed at the production of detailed geological mapping, to confirm geological localization of known sinkholes, and to find possible continuations of caves and voids below the surface. The dipole electromagnetic profiling and radiometric mapping (the gamma-ray spectrometry method) were applied to determine the spatial distribution of hard carbonate rocks and weathered valley-fill sediments. Detailed high-definition magnetometry was carried out at selected sites in the studied region with the aim of distinguishing between sinkholes and man-made lime-kilns, pits where limestone was heated and transformed into lime. The microgravity and the electrical-resistivity tomography (ERT) methods were used to create high-resolution images of the underground cave. The results of ERT and the geological survey were used as an initial model for gravity modeling. Subsurface cavities of various sizes are contrasting geophysical objects, and the electrical resistivity can range from very conductive to relatively resistive depending on the composition of the filling materials. The interpretation of resistivity properties is not always straightforward. We must distinguish air-filled (high-resistivity) and loamy water-filled (low-resistivity) cavities and fractures. The combined geophysical methodology permits us to determine a more accurate near-surface geological model, in our case the parallel interpretation of a strong conductive anomaly in the ERT inversion and a predominant density decrease in the gravity modelling yield the presence of cavities at depths approximately of 50 to 60 m below the surface.

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Detection of underground cavities by combining gravity, magnetic and ground penetrating radar surveys: a case study from the Zaragoza area, NE Spain

Cited by 108 publications

References 29 publications

Integrated approach for sinkhole evaluation and evolution prediction in the Central Ebro Basin (NE Spain)

Integrated approach for sinkhole evaluation and evolution prediction in the Central Ebro Basin (NE Spain)

Integrated Analysis of Geological and Geophysical Data for the Detection of Man-made Underground Caves in an area in Southern Italy

Integrated Geophysical and Geological Investiga-tions of Karst Structures in Komberek, Slovakia

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