Arrow Minerals has a 100% interest in 1,150km2 of exploration licences at the Strickland Gold Project, located 100km west of Menzies and 180km north of Southern Cross in the Eastern Goldfields. The Strickland Gold Project covers over 100 strike kilometres of greenstone belts and straddles the Evanston and Yuinmery Shear Zones. The Menzies and Southern Cross Regions contain over 20 million ounces of known gold endowment.
At Divole West, a robust targeting strategy resulted in the drilling of the Dassa gold discovery in early 2020. This exciting discovery has seen three phases of RC drilling and remains open along strike. Work at Dassa will continue to determine the extent of the mineralised zones.
Targeting work by Arrow highlighted the regional Boromo-Poura Shear Zone interpreted along the western flank of the Boromo greenstone belt, and a distinct strike change from N-S to NNE evident in the Divole West area. Regional magnetic data suggested the presence of unmapped greenstone belt stratigraphy in this favourable structural setting.
Arrow completed initial field work in early 2017, with a surface and auger geochemical approach used to confirm the geological interpretation and identify geochemically “live” structures in the project area.
Soil sampling was undertaken in December 2017, with a coherent 3km long NNE-striking gold anomaly identified parallel to and just east of the interpreted position of the Poura Shear Zone.
Two auger drilling programmes were subsequently completed yielding assays up to 6,140ppb Au (6.1g/t Au) that were used to guide three phases of reverse circulation (RC) drilling on the Dassa anomaly. That drilling resulted in the Dassa gold discovery, a mineralised zone from surface in sediments overlying granitic rocks that extends for 5 km along strike. The discovery hosts mineralisation up to 45 g/t Au and shows continuous gold mineralisation in three dimensions.
The Divole East gold project consists of 194km2 of tenements located on the Boromo-Poura Shear Zone. The Boromo Belt hosts several major gold deposits, including the historic Poura gold mine which produced 0.75Moz of gold at an average grade of ~15g/t Au. The Divole East permit blocks were targeted and acquired based on their geologic and structural settings on the Boromo-Poura Shear Zone and significant gold mineralisation identified in artisanal workings.
Detailed regolith mapping of the Divole East lease areas was used to guide initial geochemical exploration. Areas amenable to soil sampling were sampled over parts of the Divole permits and shallow auger drilling was completed in areas with transported cover to augment soil geochemistry information. Reverse circulation (RC) drilling was undertaken at Divole East, where highly anomalous gold mineralisation was encountered. The intersections lacked compelling continuity, and further work was suspended pending granting of an extension of the permit allowing a broader exploration strategy. The extension and the additional Dyapya permit have now been granted, and further surface mapping and sampling are planned.
Significant drilling intersections at Divole East include:
A magnetic high domain was identified in the regional aeromagnetic data in the vicinity of the artisanal gold workings at Divole East. In early 2017, an 8km2 ground magnetic survey on 20m spaced E-W lines was undertaken to cover this regional magnetic anomaly. The survey highlighted an ENE-striking regional fold structure defined by a magnetite-rich pillow basalt unit which extends across most of the Divole East tenement and appears to plunge gently to the ENE (Figure 4).
On the southern limb of the Divole East fold structure, a distinctly laminated quartz vein at least 180m long and extending under concealment to the north and south has been mapped and examined from artisanal workings. This laminated vein style is commonly associated with very high-grade mineralisation, as evidenced at Roxgold Inc.’s (TSE: ROXG) Yaramoko deposit, 90km south-west of Divole, that hosts a laminated vein grading >16g/t Au. A reverse circulation (RC) drilling programme has been completed with 24 holes drilled for 2,385m (average depth 99m). The drill holes were designed to test continuity of the previously identified high-grade Divole Main prospect and the newly identified Divole East fold structure (Figure 5). The drilling samples have been sent to Ouagadougou for assaying and Arrow expects to receive the results in early September 2019.