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Arcadia Minerals Ltd (ASX:AM7, FRA:8OH) (Arcadia, AM7 or the Company), the diversified exploration company targeting a suite of projects aimed at Lithium, Tantalum, Nickel, Copper and Gold in Namibia, is pleased to provide its quarterly activities report for the period ending March 2022.
HIGHLIGHTS
- Bitterwasser Lithium Project: Satellite and aerial photo interpretation of the Bitterwasser license areas identify total of 14 exposed surface pans totalling 9 594 hectares.
- Bitterwasser Lithium Project: 64 auger drill holes completed at the Eden Pan (1 of the 14 known pans) for 412.60 m of core
- Bitterwasser Lithium Project: Assay results for 32 of the 64 holes drilled over the Eden Pan on a 500m grid has been received
- Bitterwasser Lithium Project: Mineralogical test work conducted on a composite sample produced during the current drilling campaign identified the Bitterwasser clay mineral as the favoured montmorillonite
- Bitterwasser Lithium Project: Initial unoptimised leach test work on the Bitterwasser lithium clays conducted at the University of Stellenbosch, indicate that an organic acid attained up to 78% recoveries and could be used to extract lithium from the Bitterwasser clays
- Swanson Tantalum Project: A 29-hole diamond drilling campaign totalling 1,217.54 m, focussed on possibly expanding the existing open-pit Mineral Resource over eight of the fifteen known pegmatites comprising the Swanson Swarm, have been completed1,2 .
- Swanson Tantalum Project: 3 drill holes over the D-pegmatite returned intersections with an average true width of 10.62 m @ 372 g/t Ta2O5, 26 drill holes over the F and E-pegmatites returned intersections with an average width of 1.58m @ 583 g/t Ta2O51,2
SUMMARY OF MINING EXPLORATION FOR THE QUARTER
Swanson Tantalum Project
In February a total of 29 diamond drill holes, totalling 1,217.54 m of drilling was completed. All the holes contained pegmatite intersections, have been sampled and were sent to Scientific Services Laboratory in South Africa for analyses. Significant drill results are summarised below, additional information can be reviewed in the original market announcements.
Three holes were drilled to possibly increase the openpit potential of the D Pegmatite area
The drillhole database has now been delivered to Snowden Mining Consultants to commence a review and update of the Mineral Resource Estimate, which is expected to be completed by Q2/2022. Once completed successfully, the updated Mineral Resource will form the basis of a feasibility study that is currently underway over the project.
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AM7:AU
Quarterly Activities Report – June Quarter 2022
HIGHLIGHTS
- Bitterwasser Lithium Project: Final assay results for remaining 32 of the 64 holes drilled over the Eden Pan on a 500m grid received
- Bitterwasser Lithium Project: Regional investigation into Bitterwasser Lithium-in-clay and Lithium-in-brines minerals system defined extensive tectonic rift-related fault structures in a closed basin (the Kalkrand half-graben), similar to Clayton Valley in Nevada1
- Kum-Kum Nickel Project: Historical core samples obtained during investigation were sampled and returned the first known record of PGE and Au mineralisation in the ultramafic units of the Tantalite Valley Complex. The best results indicated mineralisation of2:
- 0.71% Ni, 0.28% Cu, 0.84 g/t Pd and 0.4 g/t Pt in orthopyroxenite
- 0.58% Ni, 0.30% Cu, 0.69 g/t Pd, 0.31 g/t Pt and 0.26% Au in orthopyroxenite
- Swanson Tantalum Project: Mineral Resource update delivers an estimate for a total indicated and inferred resource of 2.59Mt (an increase of 115%) at an average grade of 486 ppm Ta2O5 (an increase of 17.9%), 73 ppm Nb2O5 and 0.15 % Li2O.3 An Environmental Clearance Certificate and Mining Licence was also issued for the project.
1 Refer to ASX Announcement dated 09 May 2022 titled “Regional study advances work program for district scale Lithium in brines”
2 Refer to ASX Announcement dated 09 May 2022 titled “Kum-kum nickel project mineral systems approach results”
3 Refer to ASX Announcement dated 06 May 2022 titled “JORC Mineral Resource at Swanson Tantalum project doubles in size
SUMMARY OF MINING EXPLORATION FOR THE QUARTER
Bitterwasser Lithium Project
Assay results for the outstanding 32 drill holes from the 64-hole follow-up auger drilling campaign completed on 9 February 20224 over the Eden Pan was received during the quarter. All the drill holes commenced in the mineralised Upper Brown Clay Unit and every hole, except two drill holes where thin clay units were intercepted at the edges of the Eden Pan, were sampled from top to bottom up to a depth of 9.60m. Notably, the entire sequence of the drill holes sampled (i.e. Upper Brown Clay Unit and Middle Green Glay Unit) returned lithium mineralisation5.
The Middle Green Clay Unit, lithologically named the Middle-Unit (MU), comprises the dominant lithological unit from which the maiden Mineral Resource6 was derived. This green clay unit was intersected in 18 of the 32 drill holes from which assay results were received and extended from a depth of 1.4 m below surface to the maximum End-of-Hole (EOH) depth of 9.60m. A total of 43 holes from the 64-hole follow-up auger drilling campaign intersected the Middle Green Clay Unit at similar depths.
Figure1: Stacked cross section of the Eden Pan depicting drill-hole interpretation with reference to the existing Mineral Resource (green layers) and clay units intercepted in the follow-up auger drilling program.
4 Refer to ASX Announcement dated 10 March 2022 titled “Encouraging lithium drilling assay results at Bitterwasser”.
5 Refer to ASX Announcement dated 2 May 2022 titled “Final Lithium Drilling assay results at Bitterwasser”.
6 Refer to ASX Announcement dated 3 November 2021 titled “Arcadia acquires lithium project with JORC Mineral Resources”.
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Kum-Kum Nickel Project Mineral Systems Approach Results
HIGHLIGHTS
- The Department of Earth Sciences at the University of Stellenbosch concluded a Minerals Systems Approach investigation over the Kum-Kum Ni-Cu-PGE Project Licenses
- During the investigation several historical documents containing exploration results over the Kum-Kum Project were discovered, which reported best historical borehole intersections from three boreholes drilled by Rio Tinto Exploration, Tantalite Valley Minerals and Southern Sphere between 1972 and 1976 as follows:
- 16.00 m @ 0.65% Ni, 0.16% Cu
- 6.00 m @ 0.61% Ni, 0.30% Cu
- 2.44 m @ 0.62% Ni, 0.30% Cu
- Historical core samples obtained were sampled and returned the first known record of PGE and Au mineralisation in the ultramafic units of the Tantalite Valley Complex. The best results indicated mineralisation of:
- 0.71% Ni, 0.28% Cu, 0.84 g/t Pd and 0.4 g/t Pt in orthopyroxenite
- 0.58% Ni, 0.30% Cu, 0.69 g/t Pd, 0.31 g/t Pt and 0.26% Au in orthopyroxenite
- The primary magmatic sulphides comprise of coarse-grained pentlandite, pyrrhotite, and chalcopyrite
- Whole rock geochemistry highlights the geochemical similarities between the TVC and the Kum-Kum complexes. The TVC crystallized as a mafic/ultramafic layered intrusion and likely from a primitive mantle-derived parental magma.
Philip le Roux, the CEO of Arcadia stated:
“Historical drilling results reporting high values of Nickel and Copper mineralisation attracted us to the Kum-Kum Project. From the work done by the team from the University of Stellenbosch it is evident that PGE and Au mineralisation is also present and that we are looking at a geological environment that possibly could contain a stratiform Ni-Cu-PGE disseminated sulphide ‘reef’ horizon. The prospect of possibly discovering a polymetallic (Ni, Cu, Au & PGE’s) deposit has increased the allure of the KumKum Project for us, which we will eagerly follow up with further exploration. The results of the study will assist the Company to focus its exploration efforts in order to define drill targets.”
Mineral Systems Approach Results
The Tantalite Valley Complex (TVC) has been subject to a geological study by a team from Arcadia and the University of Stellenbosch involving two field sampling campaigns (8 days; 94 field samples collected) augmented with detailed consideration of historical drill core segments (57 samples), and supporting data from historical records, hyperspectral mapping, and stream sediment sampling.
Collected field- and core- samples were subjected to a suite of analytical protocols including reflected- and transmitted-light optical petrography, whole-rock major and trace element chemistry, precious metal assays, sulphur isotope analyses, scanning electron microscopy with associated spectrometries and in-situ Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) of individual sulphide grains. Together, these results provide novel insights into the known mineralisation and prospectively of the TVC.
The TVC is a ~7 km long by 3.3 km wide and roughly oval-shaped mafic-ultramafic complex representing a fault-bound block inside a dextral Pofadder Shear Zone (PSZ) that cuts across southern Namibia. Existing geochronology places the TVC as a ~1.2 Ga intrusion and roughly coeval with a Kum Kum Klippe mafic complex that is located roughly 40 km south-east and along the strike of the PSZ.
Whole rock geochemistry highlights the geochemical similarities between the TVC and the Kum Kum suite, but with the former uniquely showing much stronger geochemical evidence for overwhelmingly cumulate rocks. This implies that the TVC crystallized as a significant mafic/ultramafic layered intrusion and likely from a primitive mantle-derived parental magma that originated from a metasomatized mantle.
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This article includes content from Arcadia Minerals, licensed for the purpose of publishing on Investing News Australia. This article does not constitute financial product advice. It is your responsibility to perform proper due diligence before acting upon any information provided here. Please refer to our full disclaimer here.
Latest Drilling At Salinas Lithium Project Confirms Continuity And Thickening Of Pegmatites Along Strike And Down Dip
HIGHLIGHTS
- Three diamond holes completed, with all three intersecting multiple spodumene bearing pegmatites, confirming strike and dip continuity.
- All pegmatites are open along strike and downdip.
- Drilling 180m along strike to the south has intersected 16.17m (true thickness) spodumene bearing pegmatites.
- Drillinghasconfirmedthe“pinch and swell”natureofthepegmatitesatSalinas, highlighting the significant nature of this greenfields discovery.
- Drilling of the 14-hole program is ongoing, with SADD004 currently underway testing the down dip extensions of pegmatites intersected in SADD003.
As previously reported, the Company’s initial drillhole SADD001, intersected three separate spodumene bearing pegmatites down dip from high-grade lithium outcrop samples1. Drilling of the next two holes is now complete, with SADD002 targeting approximately 100m down dip from SADD001, and SADD003 some 180m to the south along strike (Appendix 1) (Figure 2). All three holes have intersected the same three layers of pegmatites
Figure 1: SADD003 – spodumene bearing pegmatite 65.6-81.77m, (16.17m true thickness) intersected in diamond drilling approximately 180m along strike to the south of previously reported intersections1
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New Drilling and Exploration Programs Launched for Critical Minerals and Gold Targets in World-Class Australian Mineral Provinces
- A series of new drilling and exploration programs have been launched, testing Critical Minerals and gold targets across three key project areas. These projects all lie along strike from major deposits in world-class mineral provinces in Western Australia and the Northern Territory (see locations, Figure 1).
- The exploration programs at these highly prospective projects, acquired through the purchase of an 80% interest in Payne Gully Gold Pty Ltd1, include:
- Initial drilling of un-tested key copper-gold target corridor at the Warrego East Copper-Gold Project within the Tennant Creek Mineral Field (TCMF) in the NT (see Figure 1), which has historically produced 25Mt @ 6.9 g/t Au and 2.8% Cu2. The granted Warrego East EL32725 lies directly east of Warrego, the largest historical mine at Tennant Creek, which produced 6.75Mt @ 1.9% Cu, 6.6 g/t Au2, and covers a fault corridor interpreted from detailed magnetics and the Company’s gravity survey that connects Warrego with the Gecko and Orlando copper-gold deposits (past production and resources 11Mt @ 2.3% Cu, 1.8 g/t Au2,3 – see Figure 2). A Mine Management Plan (MMP) has been submitted to the NT Government for approval for an extensive aircore drilling program and follow-up RC/diamond drilling across ironstone hosted copper-gold targets which have not been previously tested. The Company also has four EL applications in the TCMF, all of which sit on key mineralised corridors (see Figures 2 & 3).
- Initial drilling of lithium-pegmatite targets on the Warrambie Critical Minerals (Li, Ni-Cu-Co) Project in WA’s northwest Pilbara (see Figure 1). Warrambie is located just 10km east of the major Andover lithium discovery which has produced drilling intersections of up to 209m @ 1.42% Li2O4. Targets have been defined by detailed gravity and reprocessed magnetics imagery5 which are analogous to the Andover geophysical signature but have not previously been tested due to the presence of shallow soil cover. A Program of Work (PoW) has been submitted to the WA Department of Energy, Mines, Industry Regulation and Safety (DEMIRS) for approval to drill a series of aircore drilling traverses and follow-up with RC or diamond drilling across identified lithium pegmatite targets (see Figures 4 & 5). This program is expected to commence during H2 2024.
- An aeromagnetic (fixed wing) survey is underway across the granted gold tenements located along strike to the northeast of the 5Moz Big Bell gold deposit in WA’s Murchison Gold Province. (see Figures 1 & 6). The tenements cover a 50km strike length of the regional scale Chunderloo Shear Zone and regional magnetics show potential for greenstone and potentially gold-mineralised splay structures which have not been tested in areas of cover1. The detailed aeromagnetics will define these targets prior to planned aircore drilling to test bedrock targets.
Metals Australia CEO Paul Ferguson commented:
“These new exploration programs are important steps in advancing our extensive and highly prospective Critical Minerals and gold projects in WA and the NT, which are all located along strike from major deposits in world-class mineralised terranes.
High-quality drilling targets have been identified by our geological team at the Tennant Creek project, east of the high-grade Warrego copper-gold mine, and at our Warrambie project in the northwest Pilbara, which is only 10km east of the major Andover lithium discovery. We have also commenced a detailed aeromagnetic survey across a large project area located directly along strike from the 5-million-ounce Big Bell mine in WA’s Murchison district.
With exploration programs across five key projects in Australia and Canada, the second half of 2024 will be an extremely exciting period for the Company as we look to unlock the value of our portfolio.”
The target areas being tested are all located along strike from major mineral deposits (see Figure 1, below).
Figure 1: Metals Australia key Critical Minerals and gold exploration projects in world-class mineral terranes (adapted from Geoscience Australia, Australian Mineral Deposits)
Warrego East Copper-Gold Targets, Tennant Creek, NT
The Company’s Tennant Creek Project includes granted EL32725 at Warrego East and four EL applications, EL32397, EL32837, EL32410 and the more recent EL33853, located in the Tennant Creek Mineral Field (TCMF) (see Figure 2 below).
The TCMF has produced 25Mt @ 6.9 g/t gold (Au) & 2.8% copper (Cu) historically2, the equivalent of more than 8.5Moz or $20 billion worth of gold at current prices, with all production coming from deposits in outcropping areas.
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This article includes content from Metals Australia Ltd, licensed for the purpose of publishing on Investing News Australia. This article does not constitute financial product advice. It is your responsibility to perform proper due diligence before acting upon any information provided here. Please refer to our full disclaimer here.
