Un levé TDEM en trou de forage peut permettre la détection d'une minéralisation au trou et hors trou.
The Flying Doctor Pb-Zn deposit is located in the north Broken Hill area of Australia. The deposit lies beneath 40m of conductive overburden that is saturated with brackish water.
Hole 3039 intersected the weathered section of the sulphide lens.
A borehole TDEM survey was conducted in hole 3039. The sulphide lens was detected as a strong off-hole anomaly.
While the weathered zone is non-conductive, the profile confirms the presence of fresh sulphides adjacent to the hole.