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The CSIRO designed LANDTEM is a ground based TEM receiver, utilising high temperature superconducting (HTS) magnetic sensors to accurately measure the magnetic (B) field.
The rf SQUIDs (Superconducting Quantum Interference Devices) used in the LANDTEM system are extremely sensitive – they are capable of detecting magnetic fields which are one hundred millionth smaller than the earth’s magnetic field. |
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The LANDTEM
• Can utilise 1, 2 or 3 axis sensors,
• Uses liquid nitrogen coolant,
• Is portable and field proven in production surveys,
• Can directly replace the coil sensor on many EM systems,
• Has low noise white noise floor ~350fT/√Hz
Excess noise corner <40Hz |
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Successful trials in Canada have established the LANDTEM system as an important tool in the exploration for very conductive mineralisation in a complex geological environment. The LANDTEM was used in the moving loop configuration to detect deeply buried, highly conductive massive sulphides, such as nickel, while being able to effectively minimise the response from conductive cover and formational conductors.
In Australia, similar trials have given very encouraging results. |
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