Firetail Resources Limited (“Firetail” or “the Company”) (ASX: FTL) is pleased to provide an update on exploration activites at its Yalgoo Lithium Project (“Yalgoo”) in Western Australia. Final assay results have been received from the Company’s drilling program at the Johnson Well Prospect, completed in late June.
Highlights include:
- Reverse Circulation (“RC”) Drilling program comprising 22 holes for 589m completed at the Johnson Well Prospect, following up from encouraging rock chip sample results.
- Pegmatites intersected in 3 of the 4 drill sections over a strike length of around 150m and appear continuous for ~ 120m down-dip.
- Encouraging assay results include 3m @ 0.83% LiO2 from 32m including 1m @ 1.16% LiO2 from 34m in JWRC-0005.
- Apparent increase in lithium grade down-dip in eastern-most drill section (Fence 1), where the deepest intersection of pegmatite returned the best assay results (JWRC-0005).
- All pegmatites intersected are open down-dip, with the next stage of RC drilling proposed to step- out further to the northeast and test these pegmatites at depth.
Figure 1: RC rig drilling first collar at Johnson’s Well.
Executive Chairman, Brett Grosvenor, commented:
“We are really pleased to be able to report the results of this drilling at Johnson Well, that were received late last week. These results reflect an increased understanding of the region and further assurance that our team’s interpretation of the pegmatite system within the Yalgoo tenure is heading in the right direction
“Johnson Well is our second target drilled at Yalgoo to date and the confirmation of the LCT mineralisation gives us confidence that we are on the right track.
“Our Geological team, led by Robin Wilson, is hard at work planning the next round of activities to better understand the geology and potential for further LCT pegmatites in the region, as well as target generation for future drilling campaigns.”
Yalgoo Project – Johnson Well Prospect
RC Drilling
An RC drilling program was completed at the Yalgoo Project, Johnson Well Prospect in June 2023, following up from geological mapping and rock chip sampling1. The drilling program comprised of 22 holes for 589m with drilling completed on four traverses approximately 80m apart and drill holes 20m or 40m apart (see Figure 3 below).
Three of the four drill traverses intersected pegmatites indicating continuity over a strike length of at least 150m and also open down-dip. The pegmatites are interpreted to be relatively shallow-dipping towards the north/northeast and striking roughly west-northwest (see Figures 2 and 3 below).
Assay results have now been received which confirm the pegmatites intersected are Lithium-Caesium- Tantalum (LCT) pegmatites, with a best result of 3m @ 0.83% LiO2 from 32m in JWRC-0005 including 1m @ 1.16% LiO2 from 34m. All significant LiO2 assay results (>0.2% LiO2) are highlighted in the Table 2 below (Appendix 1). Lithium minerals observed in the pegmatites were predominantly lepidolite and zinnwaldite, associated with potassium feldspar, albite, muscovite and biotite.
Of note is the apparent increase in lithium grade at depth which is evident on Drill Fence 1 (see Figure 2 below) where the deepest pegmatite intersection returned the best lithium assay result (drill hole JWRC-0005).
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