Zenith Minerals Limited (ASX: ZNC) has announced an encouraging update from the 16-hole RC drilling program at its Split Rocks project in Western Australia.
The company reported that the initial RC drilling program returned significant bedrock gold mineralisation at Split Rocks, with gold mineralisation intersected in 12 of 16 wide spaced drill holes.
ZNC said that the final 1m resample results confirm and upgrade the initial preliminary 4-metre composite sampling results that were previously reported.
The new 1m-results include 10m @ 2.20 g/t Au from 60m including 6m @ 3.32 g/t Au in ZDRC022; 5m @ 3.23 g/t Au from 8m plus 4m @ 1.48 g/t Au from 44m and 1m @ 3.79 g/t Au from 124m in ZDRC020; 5m @ 2.04 g/t Au from 34m incl 2m @ 3.94 g/t Au plus 2m @ 0.89 g/t Au from 75m in ZDRC021; and 2m @ 2.56 g/t Au from 32m and 3m @ 0.57 g/t Au from 38m in ZDRC017.
Zenith reported that although several holes were abandoned prematurely due to historic workings and water, the drill program has successfully confirmed the presence of significant bedrock gold mineralisation below the widespread gold in surface laterite.
The company said that a follow-up drill program will be designed shortly and that the dual purpose program provided an initial wide spaced drill test of bedrock gold targets and lithium pegmatite bodies identified in the historical drilling in this highly prospective Forrestania lithium belt.
Split Rocks project
The Split Rocks project located in Western Australia covers a large area (>500sqkm) of the Forrestania greenstone belt. This emerging lithium district is host to the new Earl Grey lithium deposit. Zenith is exploring for this style of lithium rich pegmatite as well as gold within its large land holding.
Zenith had announced a 2-year option to explore for bedrock gold and lithium mineralisation on tenements covering the operating Dulcie Heap Leach Gold Project (DHLGO) in exchange for surface laterite gold rights on Zenith’s adjoining exploration licence E77/2388.
According to the terms of the agreement, Zenith may at its sole election exercise the option through the payment of a 2% NSR royalty payable on any future bedrock gold production from the DHLGO project area.
High-grade historical results
The company reported that the historical exploration reports on the area of the DHLGO leases highlight that high-grade gold mineralisation is predominantly hosted by moderately west dipping BIF units.
High-grade historic drill results include 6.0m @ 16.91 g/t Au, 2.0m @ 32.73 g/t Au, 2.0m @ 16.5 g/t Au, 2.0m @ 15.40 g/t Au, 5.0m @ 4.73 g/t Au, 4.0m @ 4.90 g/t Au and 9.0m @ 2.20g/t Au, presenting several high-priority target zones for follow-up.
It may be noted that most historic drill holes have only focused on the near surface laterite rich gold zone with the average drill hole depth for the project area at only 19.7m (1,777 historic shallow holes).
Drill program at Split Rock
Zenith had commenced a 16-hole (ZDRC007, ZDRC008, ZDRC009, ZDRC010, ZDRC011, ZDRC012, ZDRC013, ZDRC014, ZDRC015, ZDRC016, ZDRC017, ZDRC018, ZDRC019, ZDRC020, ZDRC021, and ZDRC022) RC drilling program at its Split Rocks project in Western Australia.
The initial preliminary 4-metre composite sampling results that were reported on the 21st October 2019. The company has now report final 1m assay results from the program.
Zenith reported that this initial program of approximately 2000m successfully confirmed bedrock gold targets beneath the currently operating Dulcie Heap Leach Gold Project (DHLGO).
Drilling returns significant bedrock gold mineralisation
The company reported that gold mineralisation (>0.5 g/t Au) was successfully intersected in 12 of the initial 16 wide spaced drill holes, with final 1m resample results received confirming and upgrading the initial preliminary 4-metre composite sampling results.
The new 1m-results from 3 separate drill areas over 2.6km of strike include: 10m @ 2.20 g/t Au from 60m including 6m @ 3.32 g/t Au in ZDRC022 (abandoned before ultimate target depth due to water), 5m @ 3.23 g/t Au from 8m plus 4m @ 1.48 g/t Au from 44m and 1m @ 3.79 g/t Au from 124m in ZDRC020, 5m @ 2.04 g/t Au from 34m including 2m @ 3.94 g/t Au plus 2m @ 0.89 g/t Au from 75m in ZDRC021, and 2m @ 2.56 g/t Au from 32m and 3m @ 0.57 g/t Au from 38m (hole abandoned in old underground workings) in ZDRC017.
Hole ZDRC022 redrill of hole ZDRC017
The company reported that the intersection in hole ZDRC022 is particularly noteworthy as this hole was a redrill of hole ZDRC017, which was abandoned at 32m depth in mineralisation having hit a cavity that is likely old underground workings.
Additionally, drill holes ZDRC022 & ZDRC018 did not reach their respective ultimate target depths to test the BIF – shear intersection due to high water ingress.
The surface sampling by Zenith had returned high lithium values up to 0.39% Li2O returned from a small pegmatite outcropping beneath the surface laterite in May 2019.
The company said that the two holes were drilled to provide an initial first pass assessment of this lithium target. A relatively thin pegmatite was intersected with assays for lithium and associated elements to come.
It may be noted that the area drill tested is located immediately east of Zenith’s Dulcie lithium target, where drilling by Zenith has confirmed thick pegmatite bodies (up to 79m downhole widths) – containing broad anomalous levels of lithium throughout 79m @ 284ppm Li2O with a peak value of 1m @ 1072ppm Li2O.
The company reported that a follow-up drill program will be designed shortly.