Field Work and Instrumentation:

The SJ Geophysics Ltd. crew consisted of three SJ Geophysics employees: Lauran Devlin (geophysical technician), John Wilkinson (technician) and Trevor Stapleton (helper); the client provided local helpers, Stuart Alec, Chris Spicer, Jeff Wannop, and Colby Doherty to assist with the survey.

Data acquisition occurred on June 28th, 2006 starting on line 75N, and progressed to the south to line 25N. The overall IP production was 5000 m/day. For the entire survey the array consisted of a modified pole-dipole configuration that was used with a combination of 12 dipoles of 10x100m and 2x300m dipoles for a total array length of 1600m. Current shots were made at a interval of 50m. For all the current shots injected the remote current was placed off to the east for reading half of the line and to the west for half.

For the entire IP survey, all data was collected using SJV 24 Full Waveform Digital Receiver (Rx). The current was injected with a 2 seconds on, 2 seconds off duty cycle into the ground via a transmitter (Tx). A GDD Tx II 3.6 KW transmitter was utilized during the duration of the survey program.

The dipole array was implemented using standard 8 conductor cables configured with 50m takeouts for the potential rods. At each current station, the electrodes used consisted of 5/8" stainless steel rods of approximately 1m in length. For the potential line, the electrodes consisted of 3/8" stainless steel "pins" of 0.5m in length.

The exact location of the remote current is used in the geophysical calculations. The location data was collected by using 12 channel hand held Garmin GPS's at position accuracy of 5-6m. Location coordinates were in UTM projection with datum of NAD 83.

The IP readings from each day's surveying were downloaded to a computer and entered into a database archive every evening. Survey data quality control, processing and data backup were done on daily basis.