Lode gold and gold porphyry
Mount Perry Project (100% owned)
Location: 130km north-west of Gympie, Queensland, Australia
Ownership: 100% owned
Tenement Area: 89 granted sub-blocks (circa 277km²) and 103 application sub-blocks (circa 336km², primarily tenement consolidation areas).
Primary Targets: High grade, lode gold deposits and possible gold porphyry deposits
The Mt Perry Goldfield is located four hours by road from Brisbane and is host to more than 60 named and numerous other unnamed historical mines and workings (see Figure 16). The area lies adjacent to Evolution’s 100,000 ounce per annum Mt Rawdon Gold Mine which lies at the intersection of two major geological fault structures; the Mt Bania and Darling Lineaments. Current published resources at Mt Rawdon stand at 36.7 million tonnes at 0.87g/t gold for 1 million ounces, and historical production has been approximately 1 million ounces. Exploration at Mt Perry has focussed along two mineralised structural zones (The Augustine-New Moonta trend and the Chinamans-Reagans trend (Figure 21). The structural orientations of these are similar to the major structures that host the Mt Rawdon gold mine.
The ‘Augustine-New Moonta trend’ extends over a 20km long north-east trending corridor from Augustine in the south-west to the New Moonta mines in the north-east. Sulphide-mineralised breccia bodies with variable gold, silver, base metals and with occurrences of uranium characterise the Augustine-New Moonta trend.
The second target zone is the ‘Chinamans-Reagans trend’. This target zone is characterised by copper-molybdenum porphyries with gold and zinc anomalous halos in the south of the project area, and it merges with the 7km long and strongly mineralised Chinaman’s Creek – Reid’s Creek – Spring Creek – Reagan’s target immediately to the north. Extensive airborne magnetic and electromagnetic surveys have been conducted over the Mt Perry Project area, together with detailed soil sampling, rock chip sampling and geological mapping surveys. This has been followed by drilling programs that conducted first pass reconnaissance drilling on numerous targets. Exploration at Mt Perry has identified several high grade vein-style targets and lower grade, high-tonnage porphyry-style gold targets.
Independent review of the geological resource potential of the area concluded that the prospects have a combined potential to host between 200,000 ounces (base case) and 700,000 ounces (geological potential) of gold. A significant amount of the tenement remains unexplored, leaving the potential for unrecognised prospects to be discovered within the area. SolGold encourages interest in a JV partnership to continue exploration at Mt Perry.
Copper-gold porphyry and batholith associated gold vein deposits
Exploration at the Normanby Goldfield has included extensive stream sediment, soil and rock chip sampling, an airborne magnetic survey and 50 drill holes totalling 1523 metres in length.
Normanby Project (100% owned)
Location: 120km north-west of Mackay, Queensland, Australia
Ownership: 100% owned
Tenement Area: 171 granted sub-blocks (circa 550km²) and 100 application sub-blocks (circa 321km², primarily tenement consolidation areas).
Primary Targets: Copper-gold porphyry deposits and batholith associated gold vein deposits
The Normanby Project is located at the southern margin of eastern Australia’s densest cluster of million-ounce gold deposits, the nearest of which is the Mt. Carlton Au-Ag mine, located 40km to the northwest of Normanby. The most significant intersections were at the Mt Flat Top prospect and included an intersection of 42m grading 1.16 g/t gold and 34m grading 1.22 g/t gold. The mineralisation has the geological features of a porphyry copper system with a high gold to copper ratio. A second phase of drilling may be carried out to test the lateral and vertical extension of this potential porphyry target. Regional-scale stream sediment and rock chip sampling has identified numerous anomalous areas, including the Mt Crompton breccia pipe.
Disseminated and vein gold and silver deposits
Principal targets at the Rannes project are structurally-controlled, low-sulphidation epithermal gold-silver deposits. Thirteen prospects have been identified within the Permian-aged Camboon Volcanics, with the majority lying along north-northwest trending fault lines.
Rannes Project (100% owned)
Location: 140km west of Gladstone, Queensland, Australia
Ownership: 100% owned
Tenement Area: 209 granted sub-blocks (circa 655km²) and 203 application sub-blocks (circa 651.5km², primarily tenement consolidation areas).
Primary Targets: Disseminated and vein gold and silver deposits
Exploration has included tenement wide stream sediment, soil and rock chip sampling surveys. A detailed airborne magnetic survey was recently re-interpreted to enhance the development of the structural model of the belt. Exploration methods have included a 3D IP (Induced Polarisation) survey, geological mapping, and trenching all contributing to definition of additional drill targets at several prospects.
A total of 473 holes have been drilled at the Rannes project for a total of 58,887m. Most of this drilling has occurred at Kauffmans prospect (151 holes) and the Crunchie prospect (90 holes), while lower metreage drill programs have been conducted at the Shilo, Cracklin Rosie, Porcupine, Brother, Spring Creek and Police Camp Creek prospects. The geometry and nature of the Kauffmans and Crunchie systems are well understood (Figures 7 and 8).
Mineral resources estimates were completed by Hellman & Schofield Pty Ltd, and by H&S Consulting Pty. Ltd., independent geological consultancies. The most recent resource estimate includes resources in both Indicated and Inferred categories for reporting under the JORC Code for Reporting of Mineral Resources and Ore Reserves. The current combined indicated and inferred resource estimate stands at 12.23 million tonnes at 0.6 g/t gold and 23.18 g/t silver; for 237,240 ounces Au and 9,105,072 ounces Ag. Table 1 lists the current resource estimates at the five main prospects. These estimates are based on gold to silver ratio of 1:50 and a 0.5 g/t Au equivalent cut-off.
Low-sulphidation epithermal Gold-Silver
SolGold’s exploration at Cracow West has included stream sediment, soil and rock chip sampling. This has identified three significant prospects; Dawson Park, Kambrook and Theodore Bends. A ‘SAM’ survey (sub-audio magnetotellurics) has also been completed over the Kambrook and Dawson Park prospect. This has identified a potential buried target at Dawson Park, which coincides with a distinct soil tellurium anomaly at surface.
Cracow West Project (100% owned)
Location: 260km west-north-west of Gympie, Queensland, Australia
Ownership: 100% owned
Tenement Area: 47 granted sub-blocks (circa 146km²) and 30 application sub-blocks (circa 93.16km²
Primary Targets: Low-sulphidation epithermal Au-Ag deposits
Cracow West is located 15km to the north-west of Evolution Mining’s Cracow gold mine (approximately 1.5 million ounces of gold). Gold mineralisation at the mine is associated with Permian-aged, low-sulphidation, epithermal quartz veins which have been emplaced along north-west and north-northwest trending fault zones. SolGold’s initial exploration concept was to explore for a similar deposit to Cracow gold mine but a recent review of the regional geology suggests that the anomalism seen at Cracow West may be associated with a later phase of Triassic intrusions, suggesting a later mineralisation event.