Project Location and Regional Geology
The Menzies project is located immediately west of the town of Menzies, which is situated around 120kms north of Kalgoorlie in Western Australia.
The project area lies within the Archaean Yilgarn province.
Menzies is held under granted Exploration Licence E29/1052 in the name of Magnum on behalf of Magnum and three other parties.
It is estimated that the Menzies Gold Camp has produced over 500,000 ozs of gold from a number of historic underground mines – Lady Shenton being the most well-known and some more recent open pits.
A feature of the historic underground mines was that the mineralization was very high grade (an ounce to the ton was common) and was originally outcropping on a ridge.
Outcrop is poor at Menzies but the mineralisation is reported as being hoisted by altered amphibolites.
During a field reconnaissance in early 2018 it was noted that a drill line extending west from Menzies into the area conventional thought to be granites had intersected mafic lithology’s in all holes found. These holes extended around 4 km s west of Menzies.
This was very much against the known geology and offered the potential for a westwards extension of the Menzies greenstone sequence under an area of nil outcrop.
An examination of the regional magnetics showed that the magnetics were elevated in this possible western extension and also showed evidence for a multiple east west dyke swarm across the Menzies Gold camp.
It is possible that the drill line intersected a mafic dyke but the dykes appear to be very narrow from the magnetics.
What it instead could be is a sequence of intercalated mafics and granites perhaps reflecting the metamorphic event that created the Menzies amphibolites and the structural environment that allowed the later dyke swarm – which coincidentally appears to be most prominent across the Menzies Gold Camp area.
The elevated magnetics could also represent a lower sequence to Menzies and host possible Au potential similar to what is present at Leonora – Tower Hill (in granite) and Harbour Lights (in ultramafic) – both lower in sequence than Sons of Gwalia.
An additional target within the Menzies Project are Au hosting palaeo channels.
A BHP study (not published – circa 1986) hypothesized – based on present day topography and geomorphology that the large majority of Tertiary drainage from the Menzies Gold Camp was to the west.
Based on the high grades of the Menzies Gold Camp this palaeo drainage could therefore host significant alluvial gold deposits if channel and trap sites development had been sufficient.
The area within the Menzies tenement application is entirely alluvial covered and therefore also represents a palaeo alluvial gold target.
A field program concluded in the March quarter that there is present high iron (Fe), magnesium (Mg) rocks in Dampier’s tenement which indicate the presence of greenstone lithologies.
As stated the West Menzies project area is entirely alluvial covered. It thus represents a virgin exploration project with the following attributes:
In exploring both models in tandem (hard rock and alluvial Au) a combination of orientation sampling (using the historic drill holes to test the thickness of transported cover and suitability of surface geochemistry) in conjunction with detailed magnetic analysis to determine potential structural sites and possible palaeo –drainage (because of maghemite in channels) would be an initial step.
Following this it may be possible to undertake a shallow Seismic reflection survey to further search for palaeo drainage. These surveys are relatively inexpensive and the equipment can be hired.