Economic and Environmental Geology (자원환경지질)

The Korean Society of Economic and Environmental Geology (대한자원환경지질학회)
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Contribution of Geophysics to the Study of Barite Mineralization in the Paleozoic Formations of Asdaf Tinejdad (Eastern Anti Atlas Morocco)

  • Ibrahim, Dakir (Lab: environmental geology and natural resources, Cartography and Digital Technologies team, Department of Geology, Faculty of Science, Abdelmalek Essaadi University) ;
  • Ahmed, Benamara (Applied Geophysics and Modeling in Geoenvironment Department of Geology, Faculty of Science and Techniques, Errachidia Moulay Ismail University) ;
  • Habiba, Aassoumi (Lab: environmental geology and natural resources, Cartography and Digital Technologies team, Department of Geology, Faculty of Science, Abdelmalek Essaadi University) ;
  • Abdessalam, Ouallali (Lab: environmental geology and natural resources, Cartography and Digital Technologies team, Department of Geology, Faculty of Science, Abdelmalek Essaadi University) ;
  • Youssef, Ait Bahammou (Laboratory of Geophysics and Natural Risks Department of Geology, Faculty of Sciences, Rabat, Mohammed V University)
  • Received : 2019.10.26
  • Accepted : 2020.06.04
  • Published : 2020.06.28
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Abstract

The use of the geophysical method in mining prospecting has been studied in the Asdaf region (South-East of Morocco). The objective of the study is to examine the aptitude of the electrical technique, in this case induced polarization (IP) and electric tomography, combined with the electromagnetic method (VLF), in the exploration of barite . The result obtained by the pseudo-sections of electrical tomography and that of KH filtration highlighted anomalies of resistant contact (greater than 400Ω.m) and of high charge chargeability (5mV / V). These contacts are hosted in less resistant Devonian age shale and sandstone. The resistivity response obtained at their level is characteristic of the venous structures associated with barite mineralization. The direction of the mineralized veins is parallel to the direction of the fractured zones (NE-SW), which indicates that the mineralization in place is due to the tectonic movements of the Hercynian orogeny (from Devonian to Permian). These veins are aligned with the locations of abandoned mine shafts and with surface mining areas. Geophysical technique therefore seems to play a key role in barite mining exploration.

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References

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