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The study aims to verify the extent and continuity of the Kropfmühl graphite deposit using advanced exploration techniques.

January 22, 2026Geophysics

Investigation of a graphite deposit with drone-based semi-airborne electromagnetics

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The study aims to verify the extent and continuity of the Kropfmühl graphite deposit using advanced exploration techniques.
Conducted a drone-based semi-airborne electromagnetic survey over 1.8 × 2.5 km2.
Utilized four galvanically coupled dipole transmitters and multiple UAV flights over four days.
Implemented a total-field magnetometer and a three-component induction coil system.
Performed a 3D inversion of multi-frequency, multi-source sAEM data to develop the subsurface conductivity model.
Identified three east-west trending conductive anomalies interpreted as graphite-rich zones.
Main anomaly located ~200 m south of the active mine suggests possible fault-controlled displacement.
Borehole resistivity logs and existing HEM data correlate well with the detected conductive zones.

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Drone-based semi-airborne electromagnetic method reveals subsurface graphite zones, indicating potential mining areas.

Mörbe et al. (2026) studied this question.

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