Magnetic Methods

Magnetic method involves the measurement of the earth's magnetic field intensity. Magnetic methods are used to resolve several problems like:

  • Mapping the basement surface and sediments in oil/gas exploration

  • Detecting various types of ore bodies in mining prospecting

  • Detecting metal objects in engineering geophysics

Magnetic surveys record the spatial variation in the Earth's magnetic flux. In marine archaeology, magnetic surveys are often used to detect and map the geology of wreck sites and discover the composition of magnetic materials found on the seafloor. The other types of magnetic fields found in rock include ferromagnetism and remnant magnetism. Ferromagnetism is generated by ferromagnetic materials like the mineral magnetite found in the rocks. Ferromagnetic materials can create their own magnetic field that may not be in line with the Earth's. Magnetic Method Applications:

  • Unexploded Ordnance (UXO) mapping
  • Locating Underground Storage Tanks (UST) and Buried Drums
  • Locating Buried Debris and Landfills
  • Archaeology
  • Mineral Exploration

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