Development of a Geoelectric Device of Capacitive Contact for Studying Archaeological Targets in Very Resistive Zones

Osella, A.; Bongiovanni, M.V.; Vega, Matı́as de la

doi:10.3997/2214-4609.20143455

Cited by 5 publications

(3 citation statements)

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“…To achieve more e cient electrical contact, geoelectrical equipment using alternating current injection and inductive coupling has been developed, which can be used in highly resistive media and on rigid surfaces such as asphalt or concrete (Osella et al, 2012). One of the systems that work with capacitive resistivity is the OhmMapper, from Geometrics.…”

Section: Resistive Capacitive Methodsmentioning

confidence: 99%

Environmental characterization of an industrially contaminated area by tetrachloroethylene using the resistive-capacitive method

Barros,

Elis,

Dantas

et al. 2024

Environ Earth Sci

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Investigation of soil and groundwater contamination is essential for assessing environmental risks and monitoring remediation processes. Geophysical methods effectively map and characterize subsurface properties without requiring direct excavations. These methods provide data on geological structure, lithological changes, groundwater level, contaminant identi cation, and remediation process monitoring.Being non-invasive, they offer an advantage over drilling operations by avoiding the need for soil excavation. This reduces the risk of contaminant migration during investigation activities. The study area in São Paulo corresponds to a former industrial galvanization site where contamination by chlorinated solvents, especially tetrachloroethylene, occurred. Remediation measures such as pumping and treatment, multiphase extraction, soil/waste removal, and chemical oxidation were implemented in the area. The contaminant and remediation processes alter the geophysical signatures of the environment, enabling the use of the electrical resistivity method. However, applying this method can be challenging in urban areas due to pavement and urban interferences. The resistive-capacitive method was employed, allowing continuous data acquisition over large areas without the need to insert electrodes into the soil.Additionally, traditional electrical pro ling and induced polarization were used to gather data at greater depths. The integration of geophysical methods with soil sample descriptions in liners provided an analysis of subsurface characteristics and affected areas. Although challenges exist in applying it to urban areas due to pavement and interferences, the electrical resistivity method can contribute to the Conceptual Site Model by lling data gaps between wells and delineating the contaminant's in uence area and the chemical oxidation remediation process.

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Section: Resistive Capacitive Methodsmentioning

confidence: 99%

Environmental characterization of an industrially contaminated area by tetrachloroethylene using the resistive-capacitive method

Barros,

Elis,

Dantas

et al. 2024

Environ Earth Sci

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show abstract

“…The use of coaxial cables makes it possible for the CR method to be used on rigid surfaces (such as asphalt or other types of paving, frozen ground, etc.) and highly resistive media, the contexts in which the application of the ER method is limited [28]. Since there is no need to insert the electrodes into the ground, the data acquisition is continuous, which makes it simpler and faster.…”

Section: Capacitive Resistivitymentioning

confidence: 99%

Near-Surface Geophysical Characterization of a Marble Deposit to Promote a Sustainable Small-Scale Mining

Penna,

Porsani,

Rangel

et al. 2024

Remote Sensing

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Small-scale mining (SSM) is responsible for almost all the production of non-metallic minerals in the world and represents around 80% of the mining in Brazil. The lack of direct geological information increases the level of uncertainty associated with the exploratory process, compromises mine planning, limits mineral extraction, and contributes to maximizing environmental issues. In this research, near-surface geophysical methods, including Electrical Resistivity, Capacitive Resistivity, Ground Penetrating Radar (GPR), and Transient Electromagnetic (TEM), were applied to characterize a marble deposit in an SSM located in the Campos do Jordão region, São Paulo state, southeast Brazil. The geophysical methods used provide indirect information about the subsurface geology based on the contrast in electrical and electromagnetic properties. Resistivity results show the efficiency of locating marble deposits, as well as fracture zones. GPR profiles allowed for the investigation of the structural heterogeneities in the subsurface. Geophysical data and lithological information from drill holes were integrated into Micromine software and guided the development of a geological model and a conceptual pit model. The information inferred from the pit modeling allowed us to analyze the potential of the deposit and should be used to assist in developing sustainable mining planning. The results of this work demonstrate that the investment in geophysical research can support the modernization of an SSM and contribute to more sustainable and productive mining.

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“…Dessa forma, visando obter um contato elétrico mais eficiente, foi desenvolvido um equipamento geoelétrico usando uma injeção de corrente alternada e acoplamento capacitivo, que pode ser usado em meios altamente resistivos e também em superfícies rígidas como asfalto ou concreto (OSELLA et al, 2012). A eletrorresistividade capacitiva se apresenta como uma forma de se utilizar a metodologia de resistividade elétrica sem a necessidade do acoplamento galvânico (cravação de eletrodos) com a superfície do terreno.…”

Section: Considerações Geraisunclassified

Caracterização geoelétrica de alvos rasos no Sítio Controlado de Geofísica Rasa-II - IAG/USP através do uso de resistividade capacitiva

Cavenaghi¹

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O que antes parecia impossível torna-se possível quando alguém se sente apto a transpor todos os obstáculos, conhecendo a sua verdadeira grandeza interior." Nuno Cobra iii iv AGRADECIMENTOS Mais um ciclo se completou em minha vida e, com muito orgulho, alcancei os objetivos traçados. Para que isso fosse possível, contei com a ajuda e compreensão de muita gente, que me doaram o seu tempo e conhecimento e que no qual sem eles tudo isso não seria possível. Agradeço primeiramente aos meus pais Sueli e Vitório que sempre me deram opções na vida e me possibilitaram escolher àquelas que mais me agradaram. Por isso, este trabalho é de vocês. Às minhas irmãs Marcella, Michelle e Monique pela parceria de sempre, tão necessária e que fez toda a diferença. Aos meus tios Antônio Cavenaghi e Bernadete. À minha amada Bruna, por todo o carinho, amor e companheirismo e pelo apoio incondicional às minhas decisões. Ao meu orientador Vagner Elis por todo o processo, desde a primeira conversa, aonde eu não havia nem prestado a prova do mestrado, até a entrega final deste trabalho, doando para mim um pouco do seu conhecimento e me mostrando caminhos que não enxerguei por si só durante o desenvolvimento da pesquisa. Aos técnicos de campo do IAG, Ernande e Marcelo, pela ajuda nas atividades de campo e pelos bons momentos de risada e descontração. Aos demais funcionários do IAG por toda a estrutura dada. Aos professores do IGc e do IAG na qual fui aluno e que contribuíram para a minha formação.

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Development of a Geoelectric Device of Capacitive Contact for Studying Archaeological Targets in Very Resistive Zones

Cited by 5 publications

References 0 publications

Environmental characterization of an industrially contaminated area by tetrachloroethylene using the resistive-capacitive method

Environmental characterization of an industrially contaminated area by tetrachloroethylene using the resistive-capacitive method

Near-Surface Geophysical Characterization of a Marble Deposit to Promote a Sustainable Small-Scale Mining

Caracterização geoelétrica de alvos rasos no Sítio Controlado de Geofísica Rasa-II - IAG/USP através do uso de resistividade capacitiva

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