Geophysical borehole measuring methods at the BGR
Geophysical measurement parameters in boreholes are acquired in different areas of application. Long-time monitoring on mining dumps is carried out by near-surface sensor measurements of temperature, pressure, pH-value, conductivity, natural gamma radiation, redox-potential and water level while optical sensors measure the pollutant concentration.
If cores are acquired by drilling, further optical, chemical and physical parameters can be evaluated.
Magnetometer measurements in deeper boreholes allow to record the magnetic field in all three dimensions.
In media of low conductivity, a direction sensitive borehole radar sensor can be used for the preliminary exploration of the spatial geological structure of the surroundings of a borehole.