The VTEM (Versatile Time-Domain Electromagnetic) survey is the leading airborne geophysical system in use today and is particularly suited to the identification of copper-zinc massive sulphide deposits, which any VMS (volcanogenic massive sulphide) belt is prolific in hosting. The VTEM survey provides high definition, deep penetrating magnetic and electro-magnetic measurements of the underlying rock which are able to detect buried massive sulphide mineral deposits. VTEM identifies anomalies deeper and with greater resolution than the previous generation of airborne surveys.