Ruth Well has been drilled previously and we upgraded the JORC Resources in 2019 for 152kt at 0.63% nickel and 0.47% copper. Additionally, we see separate nearby potential for gold exploration.
The Ruth Well nickel–copper deposits were discovered by Whim Creek Consolidated in 1971.
Artemis completed RC drilling of the Ruth Well Ni-Cu deposit to verify that older drilling met the JORC Code (2012) standards required for reporting a Mineral Resource estimate and to improve the definition of the Mineral Resource. Previous drilling in and around Ruth Well comprised 426 drill holes including open hole percussion, RAB, RC and diamond drilling for a total of approximately 18,827 m. Artemis drilled another 37 RC drill holes and 1 diamond drill hole for an additional 2,923.3 m in 2018. Artemis drilling results have been merged with the older data and AM&A undertook resource modelling and estimation incorporating both data sets.
Mineralisation comprises sulphides and magnetite within serpentinised extrusive peridotite of the Ruth Well Formation. This association suggests that the deposits are of a similar type to the extrusive Kambalda nickel deposits of the eastern Yilgarn Craton.
Ruth Well Mineral Resource estimate (December 2018):
|Tonnes (kt)||Ni %||Cu %||Ni Metal (t)||Cu Metal (t)|
Geology and mineralisation
The Ruth Well nickel–copper deposits were discovered by Whim Creek Consolidated in 1971. Mineralisation comprises violaritised pentlandite, pyrrhotite, gersdorffite, niccolite, chalcopyrite, and magnetite within serpentinised extrusive peridotite of the Ruth Well Formation. This association suggests that the deposits are of a similar type to the extrusive Kambalda nickel deposits of the eastern Yilgarn Craton. The mineralisation however probably lies within a tectonic slice of the Andover Intrusion that has been faulted into the Ruth Well Formation of the Roebourne Group on the northern side of the major, approximately 300 km long Sholl Shear Zone.
AM&A estimated the Indicated Sulphide Mineral Resource at Ruth Well to be 152,000 t at 0.5% Cu and 0.6% Ni, in December 2018, and the estimate is reported above a 0.3% nickel cut-off.
The Ruth Well tenements were aquired through our 2017 Elysian transaction. Then in early 2018 E47/3487 was granted and we quickly commenced drilling.
Recent high powered SAM geophysicalsurveying hasidentified multiple “high-order” Galvanic Source Electromagnetic (GSEM) targets within a broader VTEM target area - and this is the Zac Project.
Our 2018 drilling, as announced in May registered grades up to 11.5% nickel. We completed 38 RC drillholes, over a 2,838m drilling program, with the following intercepts:
- 13 metres @ 2.14% Ni, 1.19% Cu, 0.07% Co, 0.6 g/t Au, 0.6g/t Pd from 55m (EWRC003) (including 2m @ 8.74% Ni, 3.12% Cu, 0.26% Co, 1.58g/t Pd from 57m - and including 1m @ 11.15% Ni from 57 metres
- 21 metres @ 1.11%Ni, 0.88% Cu, 0.05% Co from 30m (EWRC002) (including 1m @ 2.54% Ni, 0.66% Cu, 0.07% Co, 3.73g/t Au & 2.82g/t Pd from 30 metres
- 11 metres @ 0.85% Ni, 0.55% Cu, 0.05% Co from40m (EWRC003) (including 1m @ 1.81% Ni, 0.64% Cu, 0.08% Co from 55 metres)