Drilling has delivered high-grade massive sulphide nickel-copper-cobalt mineralisation in both holes over an interpreted strike length of 150 metres, within a previously undrilled area which is open along strike and down dip.
Highlights
Hole 23RAN002: High-grade massive and breccia sulphide zone returned 9.3 metres at 1.0 % Ni, 0.3 % Cu and 0.10 % Co from 176.5 metres, within a broader upper mineralised zone which returned: 26.2 metres at 0.7 % Ni, 0.2 % Cu and 0.06 % Co from 169.0 metres
Lower mineralised zone returned 2.7 metres at 0.9 % Ni, 0.1 % Cu and 0.08 % Co from 281.9 metres
Hole 23RAN001: Two semi-massive to massive sulphide zones were intercepted 150 metres northwest along strike from 23RAN002
Semi massive to massive sulphide zone returned 2.4 metres at 0.8 % Ni, 0.2 % Cu, 0.10 % Co from 66.4 metres, within a broader mineralised interval of: 10.2 metres at 0.4 % Ni, 0.1 % Cu, 0.05 % Co from 63.7 metres
Semi-massive sulphide lens returned 1.3 metres at 0.6 % Ni, 0.3 % Cu and 0.09 % Co from 167.9 metres (Hole 23RAN001)
'The discovery of a new high-grade, relatively shallow nickel-copper sulphide zone in our first holes at Ranbogen is consistent with our view that the wider Rana intrusion has substantial potential to host to significant mineralisation outside of the historical mine. The holes were planned using a combination of geological mapping, MT and EM geophysical data. There are several additional targets in the Ranbogen prospect area with similar signatures still to drill test.
Two stacked zones of sulphide mineralisation have been intercepted in holes 23RAN001 and 23RAN002, which indicates that the intrusion has experienced multiple sulphide-generative events at various stratigraphic intervals, increasing the search space and scale potential. The whole intrusion outcrops over 70 square kilometres, with mineralised prospects at surface across the exposed highly prospective lower zone of the intrusion, which remains underexplored.'
Discussion of Results
Ranbogen
Mineralisation in 23RAN001 and 23RAN002 has been intercepted in two main zones over a strike length of 150 metres and is broadly coincident with an ovoid, east-west trending MT conductor. Strongly conductive EM modelled plates striking northwest-southeast over 300 metres occur within the MT conductor, and mineralisation in holes 23RAN001 and 23RAN002 is broadly coincident with these plates.
Mineralisation is open along strike and down dip, as indicated by the MT and EM data.
There are several other MT conductors with coincident EM plates and mineralised nickel rock chips at Ranbogen which remain untested.
These targets will form the focus of the remaining drill campaign and will be subject to continued ground and borehole EM surveys to aid drill targeting.
The upper zone of mineralisation in 23RAN002 is hosted by peridotite and comprises a broad, disseminated zone of sulphide which is cross cut by a 9 metre wide zone of sulphide veins, breccia and net, semi-massive and massive pyrrhotite-pentlandite-chalcopyrite. The lower mineralised zone is located at the contact between norite and peridotite and is inferred to represent an intrusive sulphide breccia containing autoliths of peridotite.
The stacked and cross-cutting nature of mineralisation indicates that there is potential for multiple sulphide-generative events, therefore multiple mineralised zones of varying scale and nickel tenor.
Sulphide grain size is variable and includes coarse-grained pentlandite which occurs as loop textures, and coarse-grained chalcopyrite which is often concentrated at the margins of sulphide veins and intrusions.
It is interpreted that the vari-textured host rocks, cross-cutting injected sulphide, coarse-grained pentlandite loop textures and formation of a peridotite-norite sill complex are indicative of a dynamic and multiphase intrusive system, in support of a syn-orogenic chonolith model of emplacement. Such mineral systems are fertile settings for nickel sulphide deposits worldwide.
Mineralisation in holes 23RAN001 and 23RAN002 is stratigraphically higher than mineralised outcrops in the north of the Ranbogen prospect area and the
This suggests that mineralisation occurs in multiple horizons associated with sills of peridotite.
Similar, underexplored peridotite sills with elevated nickel in historical rock chips are observed along the lower zone of the intrusion including at
It is inferred that the entire intrusion is prospective for the discovery of multiple mineralised lenses associated with peridotite sills and as offset lenses of mineralisation in the wall rocks.
Exploration will continue to define additional drill targets using the proven methodology applied by Kingsrose to date.
Bruvann
Results from hole 23BRU004 have been received. This hole was designed to test to the west and down dip from open mineralisation in the southwest of the mined area and intercepted two low grade zones of disseminated sulphide, between 13.8 and 14.2 metres wide and 0.22 to 0.24 % Ni, hosted in peridotite. Although below the threshold for reporting of a significant intercept, these results demonstrate that the intrusion and mineralisation is open to the west along strike and down plunge, where there is potential for discovery of additional massive sulphide zones adjacent to the intrusion sidewalls or as offset bodies within the footwall host rocks.
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