Gamma-ray spectrometry applied in the identification of potential acid mine drainage generation zones in waste rock pile with uranium ore and associated sulfides (Caldas, Brazil)
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Universidad Nacional Autónoma de México
2022
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| _version_ | 1876476293703270400 |
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| author | Anna Carolina Gastmaier Marques |
| author_facet | Anna Carolina Gastmaier Marques |
| contents | Gamma-ray spectrometry applied in the identification of potential acid mine drainage generation zones in waste rock pile with uranium ore and associated sulfides (Caldas, Brazil) Anna Carolina Gastmaier Marques César Augusto Moreira Matheus Felipe Stanfoca Casagrande Erika Juliana Aldana Arcila Ciencias de la Tierra Mining pollution geophysics groundwater environment Metal mining deeply modifies local environmental dynamics and produces large volumes of waste rock and residues, which is expected to be carefully disposed in order to prevent soil, water, and environment degradation. The Osamu Utsumi mine was a pioneer uranium ore exploitation site in Brazil, located in the State of Minas Gerais. The open pit and the high concentration of sulfide in waste rock piles are nowadays a dispendious concern to the Nuclear Industries of Brazil (INB, in Portuguese), due to sulfide oxidation and the resultant acid mine drainage (AMD). The objective of this research is to analyze the correlation between gamma-ray spectrometry data and the generation of AMD in a waste rock pile, locally known as BF-04. Potassium concentrations can be used to distinguish zones of rock depletion, lowest concentrations, and radioelement sedimentation. The radiometric data acquisition combined with previous studies indicates that high uranium and thorium concentrations are associated with high sulfide zones. The mineralized uranium ore includes sulfides that are rapidly destroyed by surface hydration conditions, responsible for generating acid mine drainage. In this sense, superficial zones in the waste rock pile with high levels of eU and eTh are areas exposed to oxidation and hydration of sulfides, and, therefore, their recognition and neutralization can contribute to decrease AMD generation in the study site and areas with similar characteristics. The gamma-ray spectrometry results can subsidize more effective and low-cost remediation techniques. 2022 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56875428005 https://www.redalyc.org/journal/568/56875428005/ https://www.redalyc.org/journal/568/56875428005/html/ https://www.redalyc.org/journal/568/56875428005/56875428005.epub https://www.redalyc.org/journal/568/56875428005/movil http://doi.org/10.22201/igeof.00167169p.2022.61.3.2207 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.3 Vol.61 |
| format | Artículo científico |
| id | redalyc_56875428005 |
| institution | Redalyc |
| language | en |
| publishDate | 2022 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Gamma-ray spectrometry applied in the identification of potential acid mine drainage generation zones in waste rock pile with uranium ore and associated sulfides (Caldas, Brazil) Anna Carolina Gastmaier Marques Ciencias de la Tierra Mining pollution geophysics groundwater environment Gamma-ray spectrometry applied in the identification of potential acid mine drainage generation zones in waste rock pile with uranium ore and associated sulfides (Caldas, Brazil) Anna Carolina Gastmaier Marques César Augusto Moreira Matheus Felipe Stanfoca Casagrande Erika Juliana Aldana Arcila Ciencias de la Tierra Mining pollution geophysics groundwater environment Metal mining deeply modifies local environmental dynamics and produces large volumes of waste rock and residues, which is expected to be carefully disposed in order to prevent soil, water, and environment degradation. The Osamu Utsumi mine was a pioneer uranium ore exploitation site in Brazil, located in the State of Minas Gerais. The open pit and the high concentration of sulfide in waste rock piles are nowadays a dispendious concern to the Nuclear Industries of Brazil (INB, in Portuguese), due to sulfide oxidation and the resultant acid mine drainage (AMD). The objective of this research is to analyze the correlation between gamma-ray spectrometry data and the generation of AMD in a waste rock pile, locally known as BF-04. Potassium concentrations can be used to distinguish zones of rock depletion, lowest concentrations, and radioelement sedimentation. The radiometric data acquisition combined with previous studies indicates that high uranium and thorium concentrations are associated with high sulfide zones. The mineralized uranium ore includes sulfides that are rapidly destroyed by surface hydration conditions, responsible for generating acid mine drainage. In this sense, superficial zones in the waste rock pile with high levels of eU and eTh are areas exposed to oxidation and hydration of sulfides, and, therefore, their recognition and neutralization can contribute to decrease AMD generation in the study site and areas with similar characteristics. The gamma-ray spectrometry results can subsidize more effective and low-cost remediation techniques. 2022 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56875428005 https://www.redalyc.org/journal/568/56875428005/ https://www.redalyc.org/journal/568/56875428005/html/ https://www.redalyc.org/journal/568/56875428005/56875428005.epub https://www.redalyc.org/journal/568/56875428005/movil http://doi.org/10.22201/igeof.00167169p.2022.61.3.2207 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.3 Vol.61 |
| title | Gamma-ray spectrometry applied in the identification of potential acid mine drainage generation zones in waste rock pile with uranium ore and associated sulfides (Caldas, Brazil) |
| topic | Ciencias de la Tierra Mining pollution geophysics groundwater environment |
| url | https://www.redalyc.org/articulo.oa?id=56875428005 https://www.redalyc.org/journal/568/56875428005/ https://www.redalyc.org/journal/568/56875428005/html/ https://www.redalyc.org/journal/568/56875428005/56875428005.epub https://www.redalyc.org/journal/568/56875428005/movil http://doi.org/10.22201/igeof.00167169p.2022.61.3.2207 |