Dolly Varden Big Bulk Option
The central Big Bulk IP survey employed 1600m arrays consisting of
32 dipoles at 50m spacing (line spacing: 200m) in order to achieve
the greatest depth penetration possible (500m to 600m).
The resulting 3D inversion model displayed the following important
chargeability and resistivity features:
·
An extensive, potentially
stratigraphically-influenced, circular high chargeability zone
starting at approximately 350m depth as defined by the 30msec
isosurface, with a few thin peripheral pipe-like anomalies extending
to surface (Figure 1);
·
A broad, tongue-shaped
low resistivity zone defined by the 750 ohm-m isosurface
cutting
east to west across the central survey area.
This is interpreted to define the base of the coincident
glacial moraine observable at surface.
Big Bulk Rock Sampling
The Big Bulk rock sampling program yielded 989 rock samples (738
outcrop, 120 boulder, 130 talus).
Seven percent of the outcrop samples graded greater than
0.5g/t gold, and ten percent of the outcrop samples graded greater
than 0.5% copper.
Analysis of these results suggests that the southwestern sector of
the Big Bulk system, primarily over
Teck property, is relatively enriched in gold, while the
northeastern sector, primarily over Dolly Varden property, is
relatively enriched in copper.
