Case Studies - Mineral Exploration

GEOTEM Survey in Canada: Caber Deposit

The Caber volcanic massive sulphide deposit is located in the northern Abitibi, Quebéc Canada. The copper-zinc deposit, containing 1.3 MT at 1.3% Cu and 5.5% Zn, was discovered by BHP Minerals Canada in 1994. GEOTEM surveys have been flown over the deposit.

The GEOTEM survey results shown here were collected with a 90 Hz waveform frequency and a 2 ms pulse width. Both B-Field and dB/dt data were collected. The data is presented with the permission of Noranda Mining and Exploration Inc.

dB/dt Profile Data	B-Field Profile Data
GEOTEM anomalous response on both Z-axis and X-axis data. Z-axis data strongly influenced by conductive overburden especially to the north along the line.	GEOTEM anomaly more distinct on both the Z-axis and X-axis data. The response from the approximately 20 metres of conductive overburden is suppressed especially for the Z-axis data.

Geological section of the Caber Deposit

The Caber deposit is located on the Key Tuffite horizon along which are located the base metal VMS deposits of the Matagami camp located about 35 kms to the east.

The strike length of the deposit is 200-250 metres with a down-dip extent of 150-250 metres. The upper most portion of the deposit has been sheared off by an over thrusted granodiorite about 125 metres below surface. Bedrock is overlain by approximately 20 metres of conductive overburden, which thickens to the north.