Great Boulder Resources (ASX:GBR) reports it has received the highest-grade gold results from phase three reverse circulation (RC) drilling at the Ironbark Prospect, located within the Side Well Gold Project in Western Australia.
This program of RC drilling has intersected the ‘highest’ gold grades the company has seen at the prospect, and the intersections highlight the potential for ‘high-grade’ plunges within the wider mineralised zones. This drilling has also confirmed mineralisation within parallel steeply west dipping lodes located on or around the contacts between mafic and ultramafic rock units.
Significant intercepts recorded by Great Boulder include 15m @ 1.99g/t Au from 37m in 22IBRC022, 5m @ 51.65g/t Au from 106m including 1m @ 193.50g/t Au from 107m in 22IBRC024, and 8m @ 4.31g/t Au from 88m and 5m @ 6.10g/t Au from 122m in 22IBRC025.
Other intercepts recorded at the prospect include 2m @ 13.76g/t Au from 133m including 1m @ 26.70g/t Au from 133m in 22IBRC027, 3m @ 27.06g/t Au from 145m including 1m @ 79.80g/t Au from 147m in 22IBRC028, and 22m @ 1.43g/t Au from 102m including 2m @ 13.57g/t Au from 102m in 22IBRC029.
“These are the highest grades we’ve yet seen at Ironbark, comparable to some of our best results at Mulga Bill”
Great Boulder Managing Director Andrew Paterson said the third phase of RC drilling at Ironbark has exceeded the company’s expectations with 2 ‘very high-grade’ intersections demonstrating the deposit’s potential for a future open pit or underground mining scenario.
“These are the highest grades we’ve yet seen at Ironbark, comparable to some of our best results at Mulga Bill.
“We have also extended the strike to more than 500m with a shallow intersection in the northernmost hole which means it remains open along strike and also at depth.
“Planning is now underway for more RC drilling to continue testing the strike of Ironbark and also looking at possible plunge orientations for the high-grade shoots.”.
The phase three RC drilling program took place in July, aiming to test strike and depth extensions of mineralisation and infill areas where previous drilling had missed interpreted lodes.
Great Boulder also reports this drilling has extended the strike of Ironbark to over 500m, and further drilling is being planned in the area of hole 22IBRC022.
Aircore (AC) drilling immediately south of Ironbark has also recently been completed to test southerly extensions with the company expecting results in the coming weeks.
The company says RC drilling is continuing at Side Well, with the rig rotating between programs at Mulga Bill and Flagpole, and a fourth round of drilling at Ironbark is currently being planned and will be completed in the coming months.
Infill auger sampling has also been completed over priority areas within the Ironbark South stratigraphy, bringing the sample spacing in to a 200m by 50m grid, and the company says this spacing will allow prioritisation of drill targets for AC testing once the Department of Mines, Industry Regulation and Safety (DMIRS) and heritage clearances are received.
Great Boulder Resources is a mineral exploration company with a portfolio of prospective gold and base metals assets ranging from greenfields through to advanced exploration located in Western Australia.
Its focus is advancing the Whiteheads and Side Well gold projects while progressing initial exploration at the earlier stage Wellington Base Metal Project located in the emerging MVT province.
Images: Great Boulder Resources Ltd