The Iroquois Project (80% Strickland; 20% Gibb River Diamonds Ltd (ASX:GIB)) is located directly along strike from Rumble Resources Limited’s (ASX : RTR) Earaheedy Project Chinook zinc-lead discovery.
Both discoveries suggest the Earaheedy Basin margin is emerging as a significant new mineralised province and is highly prospective for further zinc-lead discoveries. Strickland controls approximately 30 kilometres of strike extending from the Rumble Resources Earaheedy Project.
Earaheedy Basin, Western Australia
Project location compared to RTR’s Chinook discovery
STK completed five Reverse Circulation (RC) holes for 940 metres as an initial first pass drilling program at the Iroquois zinc-lead prospect. All five holes intersected visible zinc-lead mineralisation. Initial assays for two holes have been received, highlighting broad zones of mineralisation in the fresh rock, containing both a Zn-rich upper zone and a Zn + Pb rich lower zone
- IQRC001: 23m @ 5.5% Zn + Pb from 108m (combined), including;
- 14m @ 4.5% Zn from 108m (true depth 90m) and 9m @ 7% Zn + Pb from 135m (true depth 110m)
- IQRC003: 12m @ 5.4% Zn + Pb from 58m (combined), including;
- 6m @ 6.2% Zn from 58m (true depth 50m) and 6m @ 4.6% Zn + Pb from 96m (true depth 80m)
In addition, both holes returned broad, lower grade Zn + Pb mineralisation within the oxide zone, including:
- IQRC001: 5m @ 2.9% Zn + Pb from 23m; and 22m @ 2.2% Zn + Pb from 37m
- IQRC003: 13m @ 2.1% Zn + Pb from 24m
Drill holes IQRC001 and IQRC003 are located approximately 300m apart. Importantly, this the first drilling to have tested for fresh-rock hosted mineralisation in the area. Historic drilling has only targeted a shallow oxide manganese-rich zone. Holes IQRC004 and IQRC005 intersected the same visible sphalerite mineralisation down dip (assays awaited), potentially extending the mineralisation approximately 300m to the north-west.
Drilling intersected two distinct mineralised zones: an upper Zn-rich zone, and a lower Zn + Pb zone.
Mineralisation consists of relatively coarse grained sphalerite +/- galena mineralisation, hosted within the Iroquois dolomite unit. Proximal to the mineralisation is an alteration zone consisting of pyrite, manganese and minor sericite. Initial observations suggest there is zinc-lead-copper enrichment near the feeder zone fault structures, with a stronger zinc-lead distal enrichment.
Hole IQRC001 is approximately 300m south-west of IQRC003. The same visible mineralised zones intersected in IQRC003 were also intersected in IQRC004 (assays pending) with 16m in the Zn rich ‘upper zone’ and 9m in the Zn + Pb rich ‘lower zone.’ This same ‘upper zone’ was again intersected further down dip in IQRC005 (assays pending) over a 22m interval. Drilling did not extend deep enough in IQRC005 to intersect the interpreted lower zone. The dimensions of intersections to date demonstrate a significant sized footprint of primary mineralisation.
The drilling to date indicates strong continuity of mineralisation and highlights a substantial potentially mineralised zone which requires further drilling along strike. At this stage, drilling has only occurred on the western side of a key regional fault structure. Mineralisation is expected to be repeated on the eastern side of the fault.
The shallow nature of the mineralisation intersected to date also indicates it could potentially be amenable to open cut mining scenarios.