Location: Approximately 250 km northeast of Kalgoorlie, in the Leonora-Laverton district of Western Australia in the highly prospective Yilgarn Craton region. (see Location Map)
Area: 13 granted prospecting licenses covering 24 km2 close to major mining operations such as the Minara Nickel Operation, some 15 km to the north, and Barricks’ Granny Smith gold mine located about 50 km to the east (see regional map).
Status: Geological mapping, sampling and drilling.
Ownership/Tenure: The project is owned by Reinhold Resources Pty Ltd., a private company based in Kalgoorlie. The property comprises 13 granted prospecting licences that cover 24 km2 area over the prospective greenstone belt in the Eastern goldfields of Western Australia. The property was previously held by a now-deceased prospector for over 20 years, who made a living from the alluvial gold on the property. No in-ground, hard-rock exploration has been carried out.
Terms of Agreement: SUI must commit to exploration expenditures of AUD$200,000 on the project within 24 months from the date of execution of the agreement in order to earn 51% of the project.
The Redcastle Project lies within the Murrin-Margaret area, which is in a terrane of low strain greenstones and granitoids known as the Kurnalpi Terrane. The Murrin-Margaret area is bounded by the Keith-Kilkenny lineament to the west and the Laverton Tectonic Zone to the east. There are three main lithological entities within the mapped portion of the project area:
- a greenstone sequence of tholeiite basalts with minor interflow sediments is intruded by gabbro and dolerite sills. The dolerite sills have pyroxenitic or gabbroic bases and quartz rich or more feldspar-rich tops;
- the greenstones have been intruded by weakly porphyritic tonalite and dacite porphyry. The late stage dacite porphyry is confined to the periphery of the tonalite bodies which it intrudes, and the greenstones close to the tonalite contact. Regional metamorphism is lower greenschist facies; and
- tonalite and dacite have been intruded early in the structural evolution of the greenstone belt. They are foliated and folded with the greenstone sequence. Early isoclinal folds have been refolded into broad north trending open folds with an amplitude of about four kilometres.
Gold mineralization is hosted in quartz-veined faults and shears where they transect favourable mafic lithologies, in particular dolerite and more specifically quartz dolerite. The intersections of early structures by later cross-cutting faults where mafic rocks are present are important sites for gold deposition, as are quartz stockworks in tonalite.
Considerable gold remobilization has occurred with depletion of gold from the laterite surface to a depth of approximately 8 to 15 m. Supergene enrichment has occurred near the base of the pallid zone, resulting in development of nuggets (as seen from the numerous "patches") and rich supergene gold as previously mined. Much of the early mining selectively targeted material containing these supergene-enriched quartz veins, which were mined from between approximately 10 to 20 m below the Tertiary laterite surface; or down to 11 m below the present surface.
There is potential on the Redcastle property to discover shallow oxide mineralisation that can be mined by open cut methods due to the rare situation where the ground has only been worked for alluvial gold deposits by an individual. The project lies in a much sought after area where many gold and nickel discoveries have been made.
Status of Redcastle Exploration
A field geologist has completed mapping of the the project area (see Interpretive Geology map). This geologist has worked for many exploration and mining companies and has over 40 years of experience.
A first-pass soil sampling program was completed by Superior Mining during December 2012, with several anomalous results above the background threshold of 2 ppb returned, plotted and returned (see Redcastle Soil Gold Geochemistry map for assay results). However, the 2 km2 area in the north of the property were not sampled during this soil sampling program because of a layer of transported overburden masking the area, which required a shallow drilling program.
Over a four-day period starting on February 20, 2013, a shallow, 52-hole drilling program was carried out to test the north area (see Redcastle Phase 1 Drilling map). All samples were analyzed for gold. Samples in the rock interface were also subjected to additional analyses, which included arsenic, antimony, bismuth, tungsten, copper, lead, zinc and nickel. The most significant gold values returned from the drilling program varied from 13 ppb to 56 ppb.
Superior Mining completed a Phase 2, 50+ drillhole program in early May 2014. Results are pending.
See Redcastle Project Activities page for more details.
Adequate unencumbered surface exists on the property to be developed for a gold mine.
Access & Infrastructure
The Project lies 62 km east-southeast of Leonora and 25 kms due south of the Minara Nickel Operation. Access is from the Leonora to Laverton paved and sealed road 60 km east of Leonora and then 25kms south via the old Mt Burgess Mining - Butcher Well graded haul road that runs 5 km to the east of the Project.
The old Murrin Murrin to Yundamindera coach road and numerous other unsealed tracks allow easy access to the tenements. The Project tenements lie on the Minara pastoral lease. The northern and western part of the project area consists of dissected low hills with the highest point being the flat-topped Mt Redcastle at 487m above mean sea level.
Mineral resource and mineral reserve estimates
No historical or recent resource or reserve estimates have been made for the Redcastle Project.
The Redcastle Project area is prospective for gold mineralisation contained in quartz veins and quartz vein stockworks, hosted by intensely altered quartz dolerites and controlled by numerous northwest trending generally northeast-dipping fault zones. Alluvial gold has also been produced from the Redcastle Project area, which has yielded over 3,000 oz gold between 1970 to 2004.