Case Studies - Mineral Exploration

Kimberlite Exploration - Field Example- Point Lake (Discovery Pipe)

Note the pronounced GEOTEM response (anomaly A) recorded over the Point Lake kimberlite (figure 1). The trailing edge negative of this anomaly is characteristic of a GEOTEM response over a conductive flat-lying plate.

Figure 1: GEOTEM Profile

A magnetic low (40 nT) is coincident with the Point Lake kimberlite (figure 3). The apparent conductivity high (17 mS/m) shown in figure 4 is coincident with the magnetic low. The high spectral content of the GEOTEM on-time channel and its geological mapping capabilities is also well illustrated. The "stripping" of the sediment response in the GEOTEM off-time (figure 5) reveals the presence of a second GEOTEM target (anomaly B).

Figure 2: GEOTEM Anomalies and Flight Path

Figure 3: Total Magnetic Field Contours (nT)

Figure 4: Apparent Conductivity (On-time) Contours (mS/m)

Figure 5: Channel 7 (off-time) Amplitude Contours (ppm)