Xcalibur’s HeliTEM® survey in Mongolia’s Omnogovi Province aims to map conductive lithologies linked to base metal mineralization from near-surface to significant depths. Using a 35 m transmitter loop and 6.25 Hz base frequency, the system provides deep imaging beyond 600 m. The concentric receiver enhances signal quality and interpretation. With multiple off-time frequencies, the 6.25 Hz HeliTEM® characterizes full decay of high-conductance targets and improves differentiation between cover and target responses. The helicopter is also equipped with magnetic and radiometric sensors to acquire complementary data for comprehensive subsurface mapping