The Labyrinth Project (EL 5113) covers an area of 266 Sq. Kms and lies within Woomera Prohibited Area (WPA) in the central Gawler Craton about 30 Kms North West of Kingoonya and 40 Kms North East of Tarcoola between the Stuart Highway and the Adelaide-Darwin in rail (Figure 1).

Figure 1. WPA and EL location

The Labyrinth Project is prospective for:

  • Nickel-Copper-PGE sulphide mineralisation
  • Lode gold deposits
  • Lithium-Boron-Potasium brines of Lake Labyrinth

At the Labyrinth Ni-Cu-PGE prospect, WEX has employed the Vector Residual Magnetic Intensity (VRMI) method, combined with ground gravity data to predict coincident high density and high susceptibility bodies as shown in Figure 2.

The body is approximately 1.1 Kms long x 0.5 kms wide and the previous drill hole appears to have narrowly missed the predicted body.  This presents WEX with a drill ready target on this tenement.

Figure 2 – predicted body from 3D inversion of VRMI (red) and gravity (orange). Previous drill hole shown in yellow

Lithium-Boron-Potassium Brines

The Labyrinth Project encompasses most of Lake Labyrinth (figure 5) which is one of a series of playas that are distributed along an arcuate fracture zone that extends from Tarcoola, south east to Lake MacFarlane. Lake Labyrinth has been identified by Geoscience Australia as having lithium-boron-potassium values in brine that are significantly higher than that of seawater. Lithium concentrations are around 30 times that of sea water.

There has been very little research conducted into the economic potential of these playas and it is WEX’s intention to investigate this thoroughly at Lake Labyrinth.