Geophysical Investigation in Papua New Guinea (Q2 2016).

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GBG Australia staff recently spent several weeks in a remote part of PNG to conduct a geophysical investigation for a proposed tailings dam. The conditions experienced onsite were hot, humid and muddy but the staff enjoyed the challenge amongst the jungle.

Initially a number of techniques were trialed which included resistivity, shallow and deep ReMi (refraction microtremor). Processing was carried out on site concurrent to the field acquisition to save on time, and to adequately assess each technique’s effectiveness. Upon examination of the results of all the techniques it was decided to exclude the use of resistivity as the results being returned were not of a high standard.

In addition to the surface geophysics described above, a number of downhole VSSP (vertical seismic shear-wave profiling) and crosshole seismic surveys were conducted at strategic points throughout the tailings dam to correlate the results of the ReMi.

This is the fourth project undertaken by GBG Australia in PNG.

Figure 1: Site View.

Figure 2: Site View.

Figure 3: Site View.

Figure 4: A 5m geophone spaced ReMi line layed through the jungle.

Figure 5: A 10m geophone spaced ReMi line layed through the jungle.

Figure 6: Some makeshift shade over the equipment while we operated out the back of the vehicle.

Figure 7: One of our Perth based staff members in the jungle with the collection equipment in a carry box.

Figure 8: One of our Sydney based staff members getting some temporary shade while collecting 5m geophone spaced ReMi on a beach.

Figure 9: Getting ready to collect some cross hole data.

Figure 10: Setting up the VSSP equipment.

Figure 11: Collecting VSSP data.

Figure 12: Two of our staff members posing with the vehicles after a day of data collection.

Figure 13: Some interested locals checking up on us.

Figure 14: An example of the wildlife seen within the jungle.

Figure 15: A staff member enjoying a break from the heat.