McPherson's Bore Project
(E29/587) - 80% Encounter, 20% Avoca
The McPherson's Bore Project is located 120km west of Leonora and is located with the Lake Raeside drainage system. The project covers a coincident uranium channel radiometric anomaly and a GSWA uranium stream sediment anomaly.
Four broad spaced auger drill traverses were completed at McPherson's Bore to test the coincident geochemical and geophysical anomaly. The drilling identified a 4km long uranium geochemical anomaly associated with a near surface zone of calcrete and calcareous sediments.
A follow up aircore program was designed to test the area of the uranium geochemical anomaly identified.
Near surface uranium mineralisation is hosted in lake clays and extends over 1.7 kms of strike, with results including:
- 1m @ 448ppm U 3O 8 from surface
- 1m @ 283ppm U 3O 8 from surface
- 1m @ 271ppm U 3O 8 from surface
The mineralisation remains open to the north. It is interpreted that this mineralisation potentially represents a significant uranium leakage anomaly from a nearby buried source area.
Based on these results, the following activities are now planned:
- complete a series of sample pits to confirm the continuity of the mineralisation and to allow in-situ sampling of the mineralised horizon;
- drilling to determine the extent of mineralisation to the north; and
- drilling to locate the potential source of the surface mineralisation.
A second mineralised horizon has also been defined along the western margin of the drilling that is not associated with the primary airborne radiometric anomaly. This mineralisation occurs at around 3m depth with assays typically between 50-100ppm U 3O 8 over 2-3m and remains open to the north, south and west.
Figure 1. McPherson's Bore Northern Anomaly