ASX-listed gold explorer, Castle Minerals has snared a high-grade gold rock chip at its Polelle project in the eastern region of WA’s Meekatharra gold mining district. The find comes in the wake of a poultice of geochemical anomalies from a recently completed reconnaissance auger soil sampling program, which has also added to the prospectivity of the project. The company says rock chip samples collected from limited outcrop exposures of a brecciated quartz vein at Polelle returned up to 4.9 grams per tonne gold.
According to Castle, the veining is closely associated with a structure that splays off to the north of the main Albury Heath Shear and extends for some seven kilometres south onto its largely soil covered Polelle project tenure. It also marks the contact between mafic volcanic rocks and sedimentary rocks.
Management says the splay structure is one of several interesting geological features identified by the company’s high-resolution aeromagnetic survey carried out late last year that may be an important vector for unearthing orogenic-style gold mineralisation.
The rock chip sampling was undertaken as part of a field inspection to follow up anomalies detected by the recent soil auger sampling campaign comprising 1,877 samples bagged at 80-metre intervals on 400m spaced lines stretching over an area of 58 square kilometres.
Four of the 20 rock chip samples taken along the interpreted splay uncovered the presence of gold anomalies.
These high-grade rock chip results of up to 4.9 g/t gold from the Polelle project reinforce the recently reported auger sampling, which delineated six zones of gold anomalism. An infill soil sampling program has just commenced to tighten up some of the auger anomalies ahead of drill testing.
Polelle ticks a lot of geological boxes with our recent high-resolution magnetic program confirming that it has an excellent structurally prepared backdrop for the formation of orogenic gold deposits. It lies immediately to the east of the prolific Meekatharra gold mining district but, due to a general lack of outcrop and near-surface gold depletion, hasn’t received as much attention as its well-established neighbour.
The Perth-based company suggests the splay structure can be traced for a further 2.2km south to the Lordy Bore prospect where it intersects the Albury Heath Shear, at which point further gold anomalies have been identified by previous explorers and Castle.
Castle says the first-pass exploration at Polelle points to the fertility of the Albury Heath Shear and its northern splay, which extend for a combined 12km along the company’s tenement holdings.
Polelle sits 25km south of Meekatharra and 7km south-east of Westgold Resources’ Bluebird gold operation.
Butting up to the east boundary of Polelle within the Albury Heath Shear zone is Westgold’s recently acquired Albury Heath gold deposit which hosts an inferred resource of 528,000 tonnes of ore at an average grade of 2.09 g/t for 35,479 ounces of contained gold.
According to Castle, Polelle has been rapidly advanced from a greenfields exploration proposition, where extensive soil cover has hampered historical exploration, to an intriguing gold-bearing foothold in the Meekatharra gold mining district with several targets having been delineated for maiden drill testing.
An infill soil sampling campaign aimed at finessing the recently encountered gold auger geochemical anomalies has now kicked off.
Castle’s maiden drill program at Polelle is slated to be completed in the June quarter this year, subject to assay lab turnaround times and drill rig availability.
With a wealth of geological goodies already present at the project, the first numbers out of Polelle will no doubt be closely watched by the market meerkats.
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