Deep Earth Structure
Magnetotellurics (MT) is a good method of determining the conductivity structure of the Earth’s crust and upper mantle. Utilising the Bartington Mag-03MSL sensor or Mag-03MSESL sensor when making long-term observations (low frequency) enables variations of conductivity up to several hundred kilometres deep to be monitored, supplying information about the structure of the crust and mantle.
In earthquake studies, collecting and interpreting long-term magnetic field measurements using MT methods and Bartington Mag-03 sensors help map faults and determine their geometry. The fault plane will usually be more conductive and therefore more identifiable because of the presence of fluids.
Magnetic susceptibility measurement is useful in detecting pollution – especially high susceptibility heavy metal pollution. The Bartington MS3 Meter applied with the MS2D or MS2F probe can be used for field mapping. The MS2B sensor will assist with individual soil study or dual frequency characterisation, the MS2G sensor with airborne particle measurements and the MS2E sensor with work on leaves.
Examining the magnetic susceptibility signature of eroded materials helps determine their origin and the distance they have travelled from their point of origin. The Bartington MS3 Meter in combination with MS2B sensor and MS2D and MS2F probes are mainly used for this purpose, quickly supplying information about the type of rock from which sediments are derived and helping in the understanding of erosion processes.
Climatic conditions (temperature, rain, etc.) will modify the way some sediments react. For example, under a dry and cold climate, sediments will deposit but no chemical process will occur. If the same sediments exist in a warmer and wetter environment, chemical or biological processes will start occurring and modify the nature of the minerals, generating a process of magnetic enhancement. Magnetic susceptibility measurements using Bartington’s MS2/MS3 system in the study of wind-blown dusts assist in understanding climate change.