Torrens’ JV project delivers high-grade bornite zone within IOCG prospect

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Torrens’ JV project delivers high-grade bornite zone within IOCG prospect

Logging drillhole samples at Elizabeth Creek with a hand-held XRF analyser
Image source: Company website


  • Assay results from drilling at Torrens Mining’ jointly held Elizabeth Creek Project have returned very encouraging results.
  • The results highlight the presence of a high-grade bornite zone within the Emmie Bluff Deeps IOCG deposit.
  • The JV partners are progressing with the drilling of two new parent holes within the target.

Marking another major event this week, Torrens Mining Limited (ASX:TRN) has released more highly encouraging assay results for the Emmie Bluff Deeps IOCG target.

The IOCG target is a part of the Company’s jointly held Elizabeth Creek Copper Project in South Australia. Coda Minerals (ASX:COD) is the project operator and holds a 70% interest, while Torrens holds the remaining 30%.

Earlier this week, the Company updated on a standout 43Mt maiden Cu-Co Mineral Resource Estimate at the Emmie Bluff copper-cobalt deposit within the project. 

The project is unique, perhaps in the world, in hosting both shale-hosted copper-cobalt mineralisation and Iron Oxide Copper-Gold (IOCG) mineralisation, for which the Olympic Dam Copper Province is more famous.

Related read: Torrens’ shares soar 18% on maiden MRE for Emmie Bluff Cu-Co Deposit

IOCG assays highlight thick bornite zone at Emmie Bluff Deeps

The latest tranche of diamond drillhole assay results further confirms the presence of a high-grade bornite zone within the IOCG deposit. A peak grade of 9.48% Cu in one of the drillholes supports the exploration model adopted by the JV partners.

The assay results are from four drillholes including two parent holes and two wedge holes. The hole DD21EBD0003W2 (3W2) delivered the most significant results, encountering 68m of high-grade copper-gold mineralisation.

Torrens Mining, TRN, plan view

Simplified plan view of Emmie Bluff Deeps IOCG drilling pattern (Image source: Company update, 22 December 2021)

The hole 3W2 encountered a 26m zone of bornite mineralisation at a depth of 804m, and a 42m thick zone of chalcopyrite dominated lower lode at a depth of 911m. These results are from the section of the diamond core that was considered to be most prospective part of the hole, based on geologist’s visual estimations of copper grade. These sections were prioritised for processing and assaying for a quick turnaround in results.

Related read: Torrens Mining (ASX:TRN) riding high on thickest yet copper intercept at Emmie Bluffs

The assay result from the hole 3W2 is the best drill intercept received from Emmie Bluff Deeps to date. The 68m high-grade Cu-Au mineralisation intersected in two intervals confirms the visual results that the partners shared in October 2021.  

The 68m intercept from 3W2 includes mineralisation results comprising 1.95% Cu, 0.29g/t Au from 803.5m, including 8m @ 3.55% Cu, 0.2g/t Au from 816m for the first interval of 26.9m. The second interval of 41.8m includes 1.21% Cu and 0.23g/t Au from 911.5m.

The full assay results from the four holes are shown in the below table:

Torrens Mining, TRN, assay results

Assay results of four drillholes (Image source: Company update, 22 December 2021)

Related read: Torrens Mining (ASX:TRN) hits high-grade gold at Goldie Prospect 

Assay results of drillhole 3W3B are also anticipated to deliver a similar encouraging intercept of bornite in the higher-grade upper lode. If so, this would establish the increasing trend of thickness within this high-grade zone towards the southeast. The visual intercept result has already suggesteded this potential.

Follow up exploration remains a top priority

At the project, drilling is underway in two drillholes, EBD4 and EBD5. Drillhole EBD4 is testing one of the most prospective areas to date on the project. The aim is to further delineate the bornite dominated mineralisation zone encountered in 18W2, 3W2 and 3W3B. The decision to drill wedge holes to EBD4 and EBD5 will be made after the results of the parent holes.

Related read: IOCG mineralisation extended at Torrens Mining’s (ASX: TRN) Emmie Bluff Deeps, shares preliminary drill results

Driven by the encouraging outcomes, the JV partners are gearing up for follow up exploration activities as a top priority. The results have highlighted the potential for an enormous increase in lateral extent of IOCG mineralisation around drillhole EBD2.

The field team has been demobilised for the upcoming holidays, and work will recommence in the first week of January 2022.

TRN shares traded at AU$0.165 with a market capitalisation of AU$20.07 million on 22 December 2021.

Related read: Torrens Mining well placed to cash in on green transition tailwinds


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