Yidby Gold Project
Figure 1 : Plan showing the Yidby Gold Project and the surrounding Gold deposits.
About Yidby Gold Project
A large greenstone tenement holding (38 blocks or 122km2), located on the Great Northern Highway, 40km southwest of Paynes Find in the Mid-West of Western Australia within the prolific gold producing southern portion of the Yalgoo-Singleton Greenstone Belt approximately 400km NNE of Perth.
The Project comprises three granted exploration licences with a total area of 114 km² Yidby Gold includes three recent Surefire gold discoveries:
The Yidby Gold Project is in prime gold country, surrounded by large gold deposits as follows:
Yidby is a blind gold deposit – meaning the mineralisation does not come to the surface. The gold mineralised rocks are truncated by 5m to 20m of barren transported overburden. The lack of a geochemical signature and structural clues, normally found on the surface, make exploration more difficult and explain why it has taken so long to be discovered.
Figure 2: Fender Marshall & Yidby Gold Mineralisation interpretation
METALLURGICAL TEST WORK
Surefire has commissioned 2 programs of metallurgical test work as shown below:
Composite | Hole ID | East | North | RL | From | To | Grade | Weathering | Lithology |
---|---|---|---|---|---|---|---|---|---|
1 | YBRC037 | 525869 | 6751724 | 297 | 29 | 32 | 1.06 | oxide | oxide |
YBRC045 | 525891 | 6751726 | 297 | 35 | 40 | ||||
YBRC016 | 525724 | 6751839 | 297 | 24 | 29 | ||||
2 | YBRC006 | 525828 | 6751734 | 297 | 41 | 51 | 2.45 | transitional & fresh | porphyry / ultramafic / quartz vein |
YBRC045 | 525891 | 6751726 | 297 | 49 | 56 | ||||
YBRC037 | 525869 | 6751724 | 297 | 58 | 64 | ||||
YBRC007 | 525766 | 6751837 | 297 | 75 | 79 | ||||
YBRC010 | 525814 | 6751781 | 297 | 71 | 79 | ||||
3 | YBRC006 | 525828 | 6751734 | 297 | 55 | 59 | 12.5 | fresh | porphyry / ultramafic / quartz vein |
YBRC005 | 525782 | 6751778 | 297 | 57 | 61 | ||||
YBRC037 | 525869 | 6751724 | 297 | 64 | 67 | ||||
YBRC007 | 525766 | 6751837 | 297 | 69 | 73 | ||||
YBRC019 | 525804 | 6751839 | 297 | 150 | 153 |
Table 1: Samples used for the Yidby Gold Project Sighter Test Work Program – ALS Metallurgy Completed Jan 2023.
Excellent results were obtained, the final ALS report stating as below:
The column leach test work program was initiated on the 3rd of February 2023 and is scheduled to be completed early November 2023. It seems like a long time however, like painting a house, preparation is the key. The column leach test is rigorous, takes 8 to 9 months to do properly, and requires coarse rock, like diamond core sample, (refer figure 4 below) to understand the effect of differing crush sizes on gold recovery.
The Surefire test work involved 4 phases of analysis as shown on the ALS test work chart below:
Head assay, 2) Sizing analysis 3) Percolation analysis & 4) the 70 day column leach test, with additional time and cost to calculate the grade of the residue.
Figure 3: ALS Test Work Program for the Surefire Yidby Gold Project Column Leach Test Work.
Figure 4: YDD004 diamond drill core displaying 44m @ 2.77g/t Au in quartzose lithology with common sulphides throughout.
Figure 5: Fender Marshall Yidby – Money Prospect Orientation.
Figure 6: Yidby Gold Project – Prospect Locations & Geochemistry Trends.
Figure 7: Plan view of the Money Prospect MMI Soil Anomalism, along strike to the S-E of the Yidby Gold Deposit.