Time-domain electromagnetic measurement (BoreHole transien ElecroMagnetic - BHEM) is typically used to locate and detect massive metal ore deposits in the vicinity of a borehole. The method is based on the conductivity contrast between the electrically conductive metal ore and the more resistive host rock.
The BHEM method is effective for locating deep conductive deposits. The method can effectively guide subsequent exploration activities, especially deep drilling. Compared to the surface TEM method, the BHEM method can locate structures that are smaller in size or have lower conductivity, because the receiver in the borehole is closer to the target.
Separate transmitters and receivers are required for the measurement. Once the transmitter loop is placed on the surface, the receiving 3-component magnetometer is moved in the borehole. Transmitter loops of different sizes can be used depending on the depth target.
We use the market-leading EMIT DigiAtlantis equipment.
The primary transmitter equipment is the SMARTx4 manufactured by EMIT and the ZT transmitters manufactured by Zonge.
However, if necessary, you can ask us for alternative equipment. We have excellent connections to equipment rental companies and an extensive cooperation network. Our personnel have diverse experience with various geophysical equipment.
Customers always receive quality-assured raw data from the surveys. In addition, we can process and analyze the data. The selected level of reporting and familiarizing the customer with the survey results are done as agreed.
The end product of the borehole TEM method can be a 3D model of the deposit.
