- Drilling defines new zones of high-grade mineralisation in the western sector including, 32 m @ 1.15 % Li2O from 165 metres
- New results demonstrate extensions of the main pegmatite orebody up to 300 metres to the west. Main pegmatite is now 1,100 metres in strike length
- Phase 2 drilling also demonstrating extensions of the mineralisation in the east, the new pegmatite discovered in 2016 and at depth. Assay results are pending
The Phase 2 drilling program initially focused on targeting extensions of mineralisation in the western sector. Significant intersections from the first five drill holes, include:
- Hole 17-02: 32m @ 1.15% Li2O from 165m, including:
o 7m @ 1.44 % Li2O from177m;
o 6m @ 1.37 %Li2O from186 m; and
- Hole 17-03: 11m @ 1.07 % Li2O from 222m, including:
o 5m @ 1.42 % Li2O from 226m; and
- Hole 17-05: 19m @ 1.26% Li2O from 224m, including:
o 9m @ 1.69% Li2O from 224m.
The new holes drilled west of the main Authier pegmatite orebody have successfully demonstrated extensions of the mineralisation at open-cut mineable depths. The results have confirmed an extension of the main pegmatite orebody by 300 metres to the west within the deeper levels and 200 metres west at shallower levels. The mineralisation remains open to the west and further drilling will be required to test the full western strike extent of the deposit.
The Phase 2 drilling program has now been completed. Thirty-one diamond drill holes totaling 4,104 metres have been completed testing extensions of the mineralisation to the west, east and depth in the main orebody, and within the new northern pegmatite. Assay results from the remaining holes are pending.
Overview of the Phase 2 Drilling Program
The Phase 2 drilling program follows a successful 3,967 metre drilling campaign in 2016 which significantly expanded the size of the Authier Mineral Resource, tabulated below (see the link below).
The Phase 2 diamond drilling program commenced in January 2017 and comprised 31 holes for 4,104 metres. The objective of the Phase 2 drilling program, included:
- Defining the mineralised boundaries and lifting the resource categories in zones in the western sector that were drilled during the 2016 drill program. The most western hole drilled in the 2016 program intersected 46m @ 1.26% Li20 including 24m @ 1.62% Li20;
- Testing for mineralisation in the eastern strike extension and at depth;
- Infill definition drilling within the main resource zone where the mineralisation is not well defined and is currently treated as waste; and
- Assessing the resource potential of the new northern pegmatite which intersected 7m @ 1.36% Li20 from 15 metres.
The drilling program has been designed to improve the overall quality and expand the size of the JORC 2012 compliant Mineral Resource estimate announced in November 2016. The deposit geometry is now very well defined through nearly 22,000 metres of diamond drilling in 172 holes. The orebody remains open in the east, west and at depth. The Company's plan is to increase the size and confidence levels of the resource, and to study the merits of an expansion and/or the value adding potential of the project beyond what has been scoped in positive Pre-Feasibility Study released in February 2017.
The deposit is hosted in a spodumene-bearing pegmatite intrusion. The dimensions of the deposit drilled to date are 1,100 metres long, striking east-west, with an average thickness of 25 metres, ranging from 4 metres to 55 metres, dipping at 40 degrees to the north. The deposit outcrops in the eastern sector and then extends under up to 10 metres of cover in the western sector. The lithium mineralisation at Authier project is related to multiple pulses of spodumene bearing quartz-feldspar pegmatite. Higher lithium grades are related with high concentrations of mid-to-coarse spodumene crystals (up to 4 cm long axis) in a mid-to-coarse grained pegmatite facies.
Assay results from drilling received to date (see table 2 in the link below), include:
- AL-17-001 (western zone) - No significant results. Low grade pegmatite in fault zone from 241.8 metres to 251.5 metres;
- AL-17-002 (western zone) - 32 m @ 1.15 % Li2O from 165 metres including 7 m @ 1.44 % Li2O from 177 metres and 6 m @ 1.37 % Li2O from 186 metres;
- AL-17-003 (western zone) - 11 m @ 1.07 % Li2O from 222 metres including 5 m @ 1.42 % Li2O from 226 metres; 4m @ 1.00 % Li2O from 236 metres;
- AL-17-004 (western zone) - 11 m @ 0.88 % Li2O from 166 metres including 3 m @ 1.26 % Li2O from 166 metres; 11 m @ 1.03 % Li2O from 214 metres including 7 m @ 1.26 % Li2O from 218 metres; and
- AL-17-005 (western zone) -6 m @ 1.09 % Li2O from 199 metres; 19 m @ 1.26 % Li2O from 224 metres including 9 m @ 1.69 % Li2O from 224 metres.
The Company believes the western sector remains highly prospective for further spodumene mineralisation. Figure 4 (see the link below) demonstrates the Authier main pegmatite in relation to the local magnetic geophysical image. The main orebody is strongly correlated to a deep magnetic low which extends to the western tenement boundary. Whilst drilling during the Phase 2 drilling intersected a fault zone at section line 707250, mineralisation was still evident in drill core and the Company believes there is no reason it shouldn't continue to the western boundary, although further drilling we will be required to confirm the hypothesis.
Corey Nolan, Chief Executive Officer, commented, "The 2017 drilling program is demonstrating the potential to expand the size of the 2016 Mineral Resource. An expanded resource has the potential to extend the mine life beyond the 13 years outlined in the February 2017 Pre-Feasibility Study. Once all the assay results are received from the drilling program, the Company will update its Mineral Resource estimate".
To view tables and figures, please visit:
About Sayona Mining Ltd
Sayona Mining Limited (ASX:SYA) (OTCMKTS:DMNXF) is a company focused on sourcing and developing the raw materials required to construct lithium-ion batteries for use in the rapidly growing new and green technology sectors. Please visit us as at www.sayonamining.com.au
Sayona Mining Ltd