Round 9 EDGI Results
Mineral Resources Tasmania (MRT) has released the first two Round 9 EDGI co-funded drilling project reports, completed in October - November 2024, to Open File. Reports from the remaining two Round 9 projects are expected to be made Open File later in 2025.
Mineralised quartz vein within the Foley Zone, from drill hole C2124A, assaying 2.28 % WO3 from 798.0 m to 799.8 m.
The two reports currently being made Open File cover projects focused on critical minerals targets:
- Foley Zone (Tungsten, Tin, Copper, Flourine) - Holes C2123 & C2124(A) – Rockwell Minerals (Tas) Pty Ltd
- Bryans Road (Rare Earth Elements (REE)) – 71 holes - ABx Group Limited
Data provided includes the Final Report and all available geological, geochemical, and geophysical data, as well as drill core / sample photos. MRT have collected hyperspectral data from C2124(A), which can be requested from info@mrt.tas.gov.au. Drill core and RC samples are available for viewing, by appointment, at the Mornington Core Library.
The Foley Zone EDGI project was designed to test beneath historically drilled Foley Zone tungsten mineralisation, deep beneath the Cleveland mine workings and the currently defined Foley Zone resource. Foley Zone mineralisation intersected in drill hole C2124(A) consisted of a continuous zone of approximately 420 m of quartz ± wolframite ± scheelite ± molybdenite ± fluorite ± chalcopyrite veining and lesser breccia, within strongly altered host rocks, from 672 m – 1092 m. At a 0.1 % WO3 cutoff, assays returned a length weighted 319.5 m at 0.18 % WO3 from 772.4 m to 1091.9 m but includes multiple intervals at higher WO3 cutoffs.
Numerous intervals of other critical minerals occur within this broad zone, with some examples at the stated cutoffs including:
- Multiple intervals of bismuth above a 0.05 % Bi cutoff, such as 20.3 m at 0.1 % Bi from 779.5 m
- Numerous intervals of molybdenum above a cutoff of 0.05 % Mo, such as 36.95 m at 0.08% Mo from 879.15 m
- Several zones of flourite above a 4.0 % CaF2 cutoff, such as 7.2 m at 7.03 % CaF2 from 507.35 m
- Numerous zones of rubidium (critical mineral in the US) above a 0.1 % Rb2O cutoff, including 76.75 m at 0.15 % Rb2O from 840.35 m.
The Bryans Road EDGI project aimed to test for Dysprosium and Terbium (Dy+Tb) REE mineralisation, comparable to that intersected in the earlier exploration hole RM336. Dy and Tb (both heavy REE) are critical minerals. Round 9 EDGI drilling occurred in a previously untested area to the west of that hole and north of the company’s Deep Leads REE resource.
71 holes for 923 m (624 samples) were completed. The EDGI drilling intersected northern extensions to the Deep Leads REE mineralisation, as well as deep clay layers in a paleo river system northwest of Deep Leads. Whilst not heavily mineralised, new and encouraging geological information was obtained. As a result, further step-out drilling is planned.
Documents:
Company Report - Onshore 24_9032: Drilling Report for: EDGI Round 9, EL7/2005 Cleveland Project
Second release of round 9 EDGI results
Mineral Resources Tasmania has now released the final two Round 9 EDGI co-funded drilling project reports, completed in March to May 2025.
Semi massive pyrrhotite ± pyrite in strongly tremolite-biotite ± talc altered (dolomitic) sediment, from drill hole S1718, assaying 1.13% Sn from 695.6 to 700.1m.
The two reports cover projects focussed principally on tin targets south of Renison Mine:
- Tunnel Hill (Tin, Copper, Zinc, Lead, Silver, Nickel, Rare Earth Elements) - Holes S1717 & S1718 – Bluestone Mines Tas. JV Pty. Ltd.
- DC (Tin, Copper, Zinc, Lead, Silver, Nickel, Rare Earth Elements) – Hole S1699 - Bluestone Mines Tas. JV Pty. Ltd.
Data provided includes the final report and all available geological, geochemical, and geophysical data, as well as drill core photos. MRT has collected hyperspectral data from all three holes, which can be requested from info@mrt.tas.gov.au. Drill core is available for viewing, by appointment, at the Mornington Core Library.
Two holes were drilled at Tunnel Hill to test historic off-hole DHEM conductors, potentially associated with fault-hosted tin mineralisation on the King Solomon Fault, and stratabound mineralisation within the Renison Mine Sequence.
Hole S1717 was abandoned due to difficult drilling, whilst S1718 successfully intersected the complete Renison Mine sequence. S1718 intersected two notable mineralised zones: 4.5m at 1.13% tin from 695.6m and 1.3m at 0.52% tin from 786.9m, both within dolomitic sediments of the Dalcoath Member.
A DHEM survey of S1718 detected several conductors within or adjacent to the hole, with two notably associated with the intersected tin mineralisation. Follow-up drilling to target these new conductors is proposed.
At the DC prospect, hole S1699 was designed to intersect an untested off-hole conductor detected by a 1986 Sirotem survey of hole S1182. The conductor was thought to potentially relate to stratabound or fault-hosted mineralisation within the Renison Bell Mine Sequence.
S1699 intersected several broad skarn intervals and several dolomite units, interpreted to be the Number 2 and Number 3 Dolomites, within the Renison Mine Sequence. The hole ended in Pine Hill Granite.
S1699 confirms the presence of mineralised mine sequence dolomites several kilometres south of the Federal Fault, and the relatively shallow depth to granite at Commonwealth Hill highlights the prospectivity of the area.
The results from S1699 indicate a likely edge-intersection of the EM conductor modelled from the historic Sirotem survey. Further drilling is planned for this prospect.