Infinity Mining Limited (ASX: IMI) has completed its maiden RC drilling programme at the Tambourah South Lithium project in the Eastern Pilbara of Western Australia.
A total of 21 RC holes were completed for a total of 1812m of drilling. Over 41 individual pegmatite units containing visual lepidolite and spodumene, were logged in 18 of the 21 holes with pegmatite intervals varying from 1.0m up to 35m.
Infinity Mining Pilbara Projects
The Pilbara tenements comprise an extensive portfolio of Lithium, Gold, Nickel, Copper and Zinc exploration tenements located in the Pilbara region of northwest Western Australia, including the Tambourah South, Tambourah North, Strelley Gorge, Hillside, Panorama and Noreena Downs Projects.
Tambourah South is located in greenstones of the on the east margin of the Yule Batholith which host the relatively younger and lithium fertile Tambourah Monzogranite (Split Rock Suite). Previous mapping and rock chip geochemistry has identified 36 pegmatite dykes which have returned grades up to 2.635% Li2O.
RC Drilling Programme
Drilling Details
A total of 21 RC drill holes were completed at Infinity’s Tambourah South project for a total advance of 1812m. The drilling program was designed to test the largest lithium-bearing pegmatite bodies mapped by Infinity on the South Tambourah tenement. Drilling will test the depth extent of Lithium mineralisation (plus the associated rare-element geochemistry) and test for any blind repetitions of additional pegmatites at depth.
This maiden drilling programme was focused on testing several mapped pegmatites in three main prospect areas – McNeill, Grumpy and Naughton.
Pegmatite Intervals and Lithium Mineralogy
A total of 41 individual pegmatite units were logged in 18 of the 21 drill holes with thickness ranging from 1m to 35m. Additional minor intervals with narrower pegmatite veining less than a 1m were also recorded, hosted within the greenstone units. The lithium minerals lepidolite and spodumene were logged in many of the drill holes and were confirmed at night under UV light.
RC Drill Chip Sampling
A total of 567 RC drill chip samples were collected during the programme, including one metre samples and five metre composite samples. All samples have been forwarded to Jinning Laboratories in Kalgoorlie for analysis. All 21 holes were sampled at 1.0 metre intervals and a back-up sample was collected and stored securely. For the intervals containing pegmatite, 1.0 m samples were collected and submitted to the laboratory for analysis. For the samples outside the logged pegmatites, 5.0 m composite samples were collected using a spear and sent to the laboratory for analysis. If any assays from the 5.0 m composite samples contain anomalous Lithium and associated rare-element geochemistry, these will be re-assayed at 1.0 m intervals.
New Pegmatites Discovered During Reconnaissance Mapping
Reconnaissance geological mapping carried out during the RC drilling programme identified four new pegmatite zones in the northern part of the tenement containing visible Spodumene at surface.
A total of nine rock chip samples were collected at these sites and assay results are pending. This exciting new discovery of additional Lithium-bearing pegmatites shows that there are more pegmatites on this tenement than previously thought. Further detailed mapping and ground based geophysical surveys are planned to better understand the tenement’s full lithium potential, especially where pegmatites are partly concealed under a thin veneer of cover.
Forward Planning
The results from this maiden RC drilling programme will be used to plan the 2023 field exploration season, which will follow up any significant Lithium intercepts returned from these drill holes. A programme of ground-based geophysics is also being considered, to aid with the discovery of any additional concealed pegmatites under cover.
“The initial results of our maiden drilling programme at Tambourah South are very exciting and we look forward to receiving assay results over the next few weeks,” CEO, Joe Groot, said.
“Our team has done an amazing job over the past six months, from discovering new lithium-pegmatites units at surface earlier this year to completion of a 21-hole drilling programme just seven months later.
“The recent discovery of additional lithium pegmatites to the
north demonstrates the high lithium prospectivity of the tenement. We certainly have a lot more exploration to do at Tambourah South, as much of this tenement is still unexplored.
Next year is shaping up to be a very exciting year for Infinity.”