Inference of fault and fracture systems beneath the Matatlan waste dump basement, a VLF study

Alatorre-Zamora, M. A.; Campos-Enríquez, J. O.; Belmonte-Jiménez, Salvador Isidro; Ibarra-Nuño, Jaime

doi:10.1016/s0016-7169(14)71503-x

Cited by 3 publications

(1 citation statement)

References 24 publications

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“…The method has also proved to be suitable to detect buried hazardous waste in a quick and accurate way. In landfill environments, the VLF prospection is commonly used to locate fracture zones that are preferential pathways for the leachate flow (Alatorre-Zamora et al, 2014). Further application of the method concerns the monitoring of landfill leachate plumes associated with other conductive materials (Soupios et al, 2007).…”

Section: Very Low Frequency Electromagnetic Surveymentioning

confidence: 99%

3D geophysical imaging for site-specific characterization plan of an old landfill

et al. 2018

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Section: Very Low Frequency Electromagnetic Surveymentioning

confidence: 99%

3D geophysical imaging for site-specific characterization plan of an old landfill

et al. 2018

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Applications of the VLF-EM method for rapid Sumatran fault identification in Leuser national park, Aceh

Irwandi¹,

Marwan²,

Muksin³

et al. 2017

AIP Conference Proceedings

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Integration of Multi-geophysical Approaches to Identify Potential Pathways of Heavy Metals Contamination - A Case Study in Zeida, Morocco

Lachhab

Benyassine

Rouai

et al. 2020

JEEG

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The tailings of Zeida's abandoned mine are found near the city of Midelt, in the middle of the high Moulouya watershed between the Middle and the High Atlas of Morocco. The tailings occupy an area of about 100 ha and are stored either in large mining pit lakes with clay-marl substratum or directly on a heavily fractured granite bedrock. The high contents of lead and arsenic in these tailings have transformed them into sources of pollution that disperse by wind, runoff, and seepage to the aquifer through faults and fractures. In this work, the main goal is to identify the pathways of contaminated water with heavy metals and arsenic to the local aquifers, water ponds, and Moulouya River. For this reason, geophysical surveys including electrical resistivity tomography (ERT), seismic refraction tomography (SRT) and very low-frequency electromagnetic (VLF-EM) methods were carried out over the tailings, and directly on the substratum outside the tailings. The result obtained from combining these methods has shown that pollutants were funneled through fractures, faults, and subsurface paleochannels and contaminated the hydrological system connecting groundwater, ponds, and the river. The ERT profiles have successfully shown the location of fractures, some of which extend throughout the upper formation to depths reaching the granite. The ERT was not successful in identifying fractures directly beneath the tailings due to their low resistivity which inhibits electrical current from propagating deeper. The seismic refraction surveys have provided valuable details on the local geology, and clearly identified the thickness of the tailings and explicitly marked the boundary between the Triassic formation and the granite. It also aided in the identification of paleochannels. The tailings materials were easily identified by both their low resistivity and low P-wave velocity values. Also, both resistivity and seismic velocity values rapidly increased beneath the tailings due to the compaction of the material and lack of moisture and have proven to be effective in identifying the upper limit of the granite. Faults were found to lie along the bottom of paleochannels, which suggest that the locations of these channels were caused by these same faults. The VLF-EM surveys have shown tilt angle anomalies over fractured areas which were also evinced by low resistivity area in ERT profiles. Finally, this study showed that the three geophysical methods were complementary and in good agreement in revealing the pathways of contamination from the tailings to the local aquifer, nearby ponds and Moulouya River.

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Inference of fault and fracture systems beneath the Matatlan waste dump basement, a VLF study

Cited by 3 publications

References 24 publications

3D geophysical imaging for site-specific characterization plan of an old landfill

3D geophysical imaging for site-specific characterization plan of an old landfill

Applications of the VLF-EM method for rapid Sumatran fault identification in Leuser national park, Aceh

Integration of Multi-geophysical Approaches to Identify Potential Pathways of Heavy Metals Contamination - A Case Study in Zeida, Morocco

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