Round 8 EDGI Results
Mineral Resources Tasmania has released the first Round 8 EDGI co-funded drilling project report. This project was completed in October 2023, well before the final reporting date for Round 8, with the rest of Round 8 projects released in early November 2024.
Drill core from the top of the upper vein and breccia zone intersected in NSD005. Interval from 131.0 m to 133.6 m has a length weighted average of 2.6 m @ 0.04% Cu, 6.4% Pb, 8.8% Zn, 842 g/t Ag, 0.06 g/t Au and 1.9% Sn.
The report covers Tarcoola Iron Pty Ltd’s Hole NSD005, at their North Scamander (Sn, W, Cu, Ag, Pb, Zn and critical minerals) project.
Data includes the final report and all available geological, geochemical, and geophysical data, as well as drill core photos. MRT has collected hyperspectral data from this core, which can be requested from info@mrt.tas.gov.au. Drill core is available for viewing, by appointment, at the Mornington Core Library.
NSD005 (732.7m) was designed to test at depth, historically drilled shallow Sn-Cu-Zn-Ag bearing hydrothermal breccia, associated with an intense magnetic anomaly. The target at depth was based on new magnetic inversion modelling, placing the NSD005 target 150 m below the historic drilling.
NSD005 intersected two zones of mineralisation. The first was a previously unknown shallow vein and breccia zone which assayed 32 m @ 141 g/t Ag, 0.34% Sn, 3.8% Zn, 2.0% Pb from 130 m. The second, deeper, lower grade zone comprised pyrrhotite +/- chalcopyrite stockwork veining and is interpreted as a possible near miss of a potential tin or copper dominant system. Assays from this deeper zone were only geochemically anomalous, returning 204.5 m @ 0.05% Cu from 369 m.
Geological features and anomalous In and Ga are taken by the company to indicate similarities to the Bolivian Tin Belt deposits.
Documents:
Second release of Round 8 EDGI results
Anchor Mine EDGI hole ATD1, 54 – 61.1m Greisen altered granite showing dark zinnwaldite-quartz alteration, associated with elevated lithium values.
Mineral Resources Tasmania (MRT) has now released to Open File, Final Reports from the remaining Round 8 EDGI co-funded drilling projects, completed in April-May 2024.
The reports which are now Open File cover the following projects:
Round 8 – Wind Break (Rare Earth Elements) – Holes WB126 to WB155 – ABx4 Pty Ltd
Round 8 – East Denison (Gold) – DRG006 – Edrill Pty Ltd
Round 8 – Basin Lake (Copper, Gold) – Hole LMD7 – Moina Gold Pty Ltd
Round 8 – Anchor Tin Deeps (Tin, Lithium, Rare Earth Elements) – Holes ATD1 & ATD2 – Yunnan Tin Australia TDK Resources Pty Ltd
Data includes the Final Reports and all available geological, geochemical, and geophysical data, as well as drill core photos. MRT are collecting hyperspectral data from this core, which can be requested from info@mrt.tas.gov.au (~2.5Gb per hole). Drill core is available for viewing, by appointment, at the Mornington Core Library.
At the Wind Break project, north of Westbury, the aim was to determine the presence of rare earth elements (REE) in an outlying part of the Deep Leads - Rubble Mound project area, which had only been explored previously for bauxite. The EDGI drilling successfully intersected REE mineralisation, interpreted to be an eastern extension of the REE mineralisation at Deep Leads - Rubble Mound. Together with re-assayed earlier bauxite holes, the additional EDGI drilling resulted in an estimated Indicated + Inferred Resource of 8.9mt at 826ppm TREO at Wind Break.
At East Denison, north of Golconda, drill hole DRG006 (554.4m) was designed to test a structural interpretation of passive seismic data, within Mathinna Group metasediments, as well as the depth to top of an interpreted underlying granitic body. The hole also aimed to test for a southern extension of the structure reported at the Bardenhagens prospect and establish whether the underlying intrusive was a possible source for potential supergene gold mineralisation found within EL11/2019. Due to drilling difficulties DRG006 did not drill to planned depth (700m). An underlying granitic intrusive was not intersected and alteration within the hole does not support proximity to one. 82 samples were submitted for assay, but none were anomalous for gold.
At the Basin Lake prospect, north of Queenstown, drill hole LMD7 targeted an IP anomaly associated with sericite-pyrite alteration within a quartz feldspar porphyry intrusive. The hole intersected variable sericite-pyrite alteration at the margins of the porphyry body, and this is thought to be the cause of the IP anomaly. Assays show only very slightly elevated levels of copper and gold.
Two holes for 487m were drilled at Anchor mine, west of St Helens, to examine the tin and REE / critical mineral potential at depth, associated with the margins of the interpreted regional-scale Crystal Creek Lineament. Drill hole ATD1 intersected a zone of lithium bearing mica-rich (zinnwaldite) alteration. However, the lithium assays from ATD1 were not highly anomalous. The company believes that the two EDGI holes have confirmed the existence of the Crystal Creek Lineament in the vicinity of the Anchor deposit, which may be expressed as structural zone intruded locally by a distinctive quartz-feldspar porphyry.
Documents:
Company Report - EL9/2010 - Drilling Project Report - Deloraine
Company Report - EL11/2019 - Denison River Diamond Drill Report DRG006
Company Report - EL11/2016 - Drill Hole LMD7 Basin Lake Prospect Report - Lake Margaret
Company Report - EL17/2017 - Final Drilling Project Report - Poimena, NE Tasmania