The Bottle Creek gold mine lies 100 km north east of Menzies in the Mt Ida gold belt. The gold mine is located on the northern extremity of the Mt Ida-Ularring greenstone belt extending from Davyhurst to Mt Alexander.
The Ularring greenstone belt forms the western part of the Norseman-Wiluna Province of the Yilgarn Craton. The location of mineralisation and local geology, is shown in Figure 2. Locally, gold and silver mineralisation is hosted in carbonaceous, sulphidic shales, within a larger package of interbedded basaltic volcanics, sediments and ultramafic rocks. The area is tightly folded and metamorphosed, with intrusion of younger dolerite dykes (Robertson, 2003). Mineralisation at Bottle Creek occurs over a strike length of 11km, running north-west-south east and is interpreted to be nearly vertical, to steeply west-dipping.
Bottle Creek was discovered by Electrolytic Zinc Company of Australasia (EZ) in 1983, who passed management of the project to Norgold Limited (Norgold) in 1985. Norgold managed the project through to production. Ore was treated onsite in a CIP Circuit, producing 90,000 oz Au over an 18-month period from 1988-1989 from two open pits. Significant drilling was undertaken by EZ and later by Norgold along a 9.8 km strike length from 1984 to 1989. RC drill fences at 100m spacing were carried out, with infill drill line spacing at 50m and 25m at various locations. The majority of drilling targeted oxide mineralisation, and 80m vertical below surface.
Mineralisation at Bottle Creek is strongly weathered, with a regolith profile to a depth of ~80m. Gold mineralisation is enriched through supergene processes in the oxide zone, and this oxide ore was the target of previous miners.
Evaluation of historical data is currently being undertaken by BMGS with support from the Company, and it is estimated that the Company will be in a position to provide details of the evaluation and report to the market by the end of November 2017, historical drilling at Bottle Creek includes:
- 5,071m in 78 Diamond drillholes;
- 43,492m in 839 Reverse Circulation drillholes; and
- 32,093m in 776 Rotary Air Blast drillholes.
The Company considers Bottle Creek to be a standalone project with potential to develop a mineable resource.
The project comprises two granted mining leases, existing tailings dams. Governmental approvals are also in place (application by the Vendor) for a new tailings dam and a test heap leach pad to process the existing low-grade ore stockpile onsite from the previous mining undertaken by Norgold.