Environmental applications of magnetometry profiling

Gibson, Paul; Lyle, P.; George, Dinu

doi:10.1007/bf00770430

Cited by 15 publications

(12 citation statements)

References 2 publications

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“…Indeed in numerous cases the ground based surveys will be in response to the need for higher resolution studies of certain anomalies in the aeromagnetic data in order to provide a more constrained interpretation (Blakely et al, 2005). Ground based magnetic profiling has been highly successful in detecting and modelling faults and fractures in sediments (La Femina et al, 2002) and bedrock (Gibson et al, 1996, Dutta et al, 2006, features where secondary hydraulic permeability can often enhance groundwater flow. Geological bodies, such as igneous dykes, can exert controls on groundwater flow directions where they cut across aquifers.…”

Section: Ground Based Magnetic Measurementsmentioning

confidence: 99%

“…Geological bodies, such as igneous dykes, can exert controls on groundwater flow directions where they cut across aquifers. Magnetic profiling can reveal the location, extent, and strike of these magnetic bodies (Gibson et al, 1996). In cases where a magnetic contrast exists between the underlying basement and infilling sediments aquifer thickness can be modelled through magnetic mapping (Birch, 1984).…”

Section: Ground Based Magnetic Measurementsmentioning

confidence: 99%

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Advancing process‐based watershed hydrological research using near‐surface geophysics: a vision for, and review of, electrical and magnetic geophysical methods

Robinson

Binley

Crook

et al. 2008

Hydrological Processes

243

169

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Abstract:We want to develop a dialogue between geophysicists and hydrologists interested in synergistically advancing process based watershed research. We identify recent advances in geophysical instrumentation, and provide a vision for the use of electrical and magnetic geophysical instrumentation in watershed scale hydrology. The focus of the paper is to identify instrumentation that could significantly advance this vision for geophysics and hydrology during the next 3-5 years. We acknowledge that this is one of a number of possible ways forward and seek only to offer a relatively narrow and achievable vision. The vision focuses on the measurement of geological structure and identification of flow paths using electrical and magnetic methods. The paper identifies instruments, provides examples of their use, and describes how synergy between measurement and modelling could be achieved. Of specific interest are the airborne systems that can cover large areas and are appropriate for watershed studies. Although airborne geophysics has been around for some time, only in the last few years have systems designed exclusively for hydrological applications begun to emerge. These systems, such as airborne electromagnetic (EM) and transient electromagnetic (TEM), could revolutionize hydrogeological interpretations. Our vision centers on developing nested and cross scale electrical and magnetic measurements that can be used to construct a three-dimensional (3D) electrical or magnetic model of the subsurface in watersheds. The methodological framework assumes a 'top down' approach using airborne methods to identify the large scale, dominant architecture of the subsurface. We recognize that the integration of geophysical measurement methods, and data, into watershed process characterization and modelling can only be achieved through dialogue. Especially, through the development of partnerships between geophysicists and hydrologists, partnerships that explore how the application of geophysics can answer critical hydrological science questions, and conversely provide an understanding of the limitations of geophysical measurements and interpretation.

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Section: Ground Based Magnetic Measurementsmentioning

confidence: 99%

Section: Ground Based Magnetic Measurementsmentioning

confidence: 99%

Advancing process‐based watershed hydrological research using near‐surface geophysics: a vision for, and review of, electrical and magnetic geophysical methods

Robinson

Binley

Crook

et al. 2008

Hydrological Processes

243

169

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“…by magnetic minerals or metallic Fe/Ni, are detectable by magnetometrie profiling. This geophysical, non-destructive and rapidly Downloaded by [Brunel University London] at 15:08 22 December 2014 performed technique can reveal geological faults and fractures, buried metallic objects, or even subsurface water movement models [41]. Within this chapter, merits and limitations of magnetometrie profiling in the detection of combustion products in the environment will be discussed.…”

Section: Magnetic Minerals As Markers For Combustion Processesmentioning

confidence: 98%

Environmental aspects of trace elements in coal combustion

Sager¹

1999

Toxicological & Environmental Chemistry

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“…Landfills without leachate collection systems pose a high risk to the ecosystems and to human health. In the past, this was not case, the municipal solid waste contains domestic ferrous materials that produce strong magnetic anomalies that are helpful in delineating the lateral extent of the waste deposit (e.g., Gilkeson, Heigold and Laymon 1986;Barrows and Rocchio 1990;Gibson, Lyle and Gorge 1996;Marchetti et al 2002;Wemegah et al 2014). IP has also been used in a variety of environmental applications linked to the characterisation of waste sites, ranging from the detection and mapping of contaminants (e.g., Vanhala 1997;Kemna, Binley and Slater 2004;Sogade et al 2006;Flores Orozco et al 2011;Flores Orozco et al 2012;Johansson, Fiandaca and Dahlin 2014;Wemegah et al 2014) to geological discrimination (e.g., Schmutz et al 2010;Gazoty et al 2012b) and landfill delineation (e.g., Carlson, Hare and Zonge 2001;Leroux, Dahlin and Rosqvist 2010;Gazoty et al 2012a,b;Wemegah et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Spectral time‐domain induced polarisation and magnetic surveying – an efficient tool for characterisation of solid waste deposits in developing countries

Wemegah

Fiandaca

Auken

et al. 2016

Near Surface Geophysics

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Time‐domain induced polarisation and magnetic data were acquired to map and characterise the decommissioned and un‐engineered municipal solid waste disposal site of the Kwame Nkrumah University of Science and Technology, located in the Kumasi Metropolis of Ghana. In this survey, 13 induced polarisation profiles 500–800 m long and 26 magnetic profiles 400–800 m long were acquired. In addition, two boreholes were drilled to help in the interpretation of the geophysical data. The study was carried out with the aim of determining the risk posed by the waste deposit to the quality of the soil and the ground water system, which is the main potable water supply for the Secondary School, the University Teaching Hospital and the Veterinary School, situated within the catchment area of the site. Full‐decay 2‐D time‐domain induced polarisation inversions in terms of Cole–Cole parameters were used for interpreting the induced polarisation data. The chargeability, resistivity and normalised charge‐ability distributions, together with the magnetic results, aided in a full characterisation of the site geology, the waste and the associated pollution plume. In particular, clear contrasts in resistivity and the polarisation parameters were found between the saprolite layer and the granitic bedrock, which are the main lithological units of the area. Furthermore, it was found that the Kwame Nkrumah University of Science and Technology waste deposit is characterised by a low‐chargeability and low‐resistivity signature and that the low‐resistivity area spreads out from the waste deposit into the permeable saprolite layer, indicating the presence of a leachate plume. A fracture zone in the granitic bedrock beneath the waste deposit, which is a potential conduit for leachate contamination of the ground water system, was also identified. The study thus provides the information needed for assessing the future impact of the waste on the water quality in the area and for designing risk‐mitigation actions.

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Environmental applications of magnetometry profiling

Cited by 15 publications

References 2 publications

Advancing process‐based watershed hydrological research using near‐surface geophysics: a vision for, and review of, electrical and magnetic geophysical methods

Advancing process‐based watershed hydrological research using near‐surface geophysics: a vision for, and review of, electrical and magnetic geophysical methods

Environmental aspects of trace elements in coal combustion

Spectral time‐domain induced polarisation and magnetic surveying – an efficient tool for characterisation of solid waste deposits in developing countries

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