Mincor Resources uncovers massive and matrix nickel sulphides at Cassini North prospect

by Leena Thomas
Image: Mincor Resources NL

Mincor Resources NL (ASX: MCR) has announced the intersection of high-grade massive and matrix nickel sulphide mineralisation grading 6.6% Ni from the drilling at its Cassini North prospect, located 700m to the north of its cornerstone Cassini Main deposit at Kambalda in Western Australia.

The company reported a new high-grade intercept of 2.5m at 6.6% Ni in a new channel at Cassini North. This represents the first ore grade intercept in a new channel position north of Cassini Main

MCR said that MDD350 is the first hole drilled following an update to Mincor’s geological model for the area. The company said that the intersection is approximately 700m to the north of the planned infrastructure at the Cassini Main Ore Reserve (1.2Mt @ 3.3% Ni for 40,100 nickel tonnes).

Mincor said that the recent down-hole EM (DHEM) indicates a conductor down-plunge from this hole.

The company noted that the early results at Cassini North have similarities to the early stages of the Cassini Main discovery.

MCR said that the very limited drilling in the area further reinforces the significant emerging opportunity at Cassini North.

Cassini Nickel project

Mincor Resources’ nickel restart strategy is centred on four key production hubs at Cassini, Durkin North, Ken/McMahon, and Miitel/Burnett.

The Cassini Nickel Project area lies on the southern end of the Widgiemooltha Dome in the southern part of the Archaean Norseman–Wiluna Greenstone Belt and has a reported Mineral Resource of 1.254Mt at 4.0% Ni for 50,400 nickel tonnes.

Two open ended resource trends have been delineated at Cassini to date, CS2, and CS4.

Mincor’s exploration team had completed the reassessment and geological re-modelling of the Cassini North area. The company had then commenced drilling at Cassini North following the reassessment and geological re-modelling of the area.

High-grade intercepts from Cassini North

The company announced that the first diamond hole, MDD350, drilled at Cassini North has intersected high-grade massive and matrix nickel sulphide mineralisation.

MCR reported that MDD350 returned a significant intercept of 2.5m @ 6.6% Ni (including a higher-grade core of 2.0m @ 7.7% Ni), comprising a mix of high tenor massive and matrix nickel sulphides.

Mincor reported that the intersection is located on the lower eastern side of the Cassini North channel – a position that has not been the focus of the previous exploration.

The company said that the new geological interpretation suggests that the Cassini North channel trends sub-parallel to the Cassini Main system and is open for 250m to the north and at least 1.2km to the south.

MCR noted that this new intersection is located on the contact rather than the hangingwall position – unlike previous less significant intersections at Cassini North – and is sediment free. These characteristics are similar to the early stage of the Cassini Main deposit

Significant breakthrough

Mincor said that given the significant grade and tenor of the mineralisation, its location within an interpreted new channel position that runs sub-parallel to the Cassini Main deposit, and the presence of a significant DHEM conductor down-plunge from the intercept, the Company’s exploration team regards the intercept as a significant breakthrough which heralds an important new discovery for the Company.

Management comments

Mincor’s Managing Director David Southam said: “This is a really exciting development which stems directly from the systematic approach which the geology team has adopted to nickel sulphide exploration. The discovery intercept of 2.5 metres at 6.6% Ni in a new area at Cassini North is the result of our latest re-interpretation of the basalt model from recent drilling and DHEM results.

We’ve completed DHEM on MDD350 and the results indicate a conductor which requires follow-up. The team will immediately commence planning for a discrete drilling program which will help to enhance our understanding of the geology in this lightly drilled area over the next few months.

Given that the intersection is relatively shallow at 260 metres and is only 700 metres to the north of the designed Cassini Main infrastructure, we are excited by the potential for the broader Cassini area to emerge as a new mining district in its own right within the general Kambalda region.

The early exploration results at Cassini North are very similar to what we saw at Cassini Main itself in the early days, supporting our view that the Cassini area has the potential to be a nickel camp.

The next few months will be a really exciting time for Mincor, with project financing discussions progressing well, ahead of a Final Investment Decision.

Following our recent Exploration and Development update on 17 August 2020, I can also confirm that we have now awarded the Stage 2 early works at the Northern Operations and the additional infrastructure works at Cassini to Pit N Portal.”