HOLDING

100%

RESOURCES

Gold

PROJECT SIZE

39km2

LOCATION

200kms North of Meekatharra

The Bulgera Gold Project is located 200kms north of Meekatharra in the +6.5moz gold Plutonic Well greenstone belt. The Bulgera gold trend is the offset-extension of the mafic-ultramafic mine sequence hosting the Plutonic Gold mine (+5.5moz) & Vango’s Marymia project (+1moz). Key infrastructure in the area includes power, water, airstrips, and accommodation. The Bulgera oxide ore was last processed at the Plutonic gold Mine in 2004 with the haul road still in place. Total historical production from the three shallow oxide pits was reported to be 441kt @ 1.65g/t.

RC and diamond drilling completed in 2021 resulted in extending a new high-grade gold zone to over 500 metres down-dip of the shallow Bulgera open cut.

In early 2022 a new project block model and resource estimate increased the gold inventory by 113% to 5 million tonnes grading 1.2g/t for 200,000 ounces of gold.

The March 2022 JORC 2012 compliant Mineral Resource for the Bulgera Gold project applying a 0.6g/t lower Au cut-off stands at:

Preliminary metallurgical testing was undertaken by ALS Global Metallurgical Services on three Bulgera gold RC samples[1]. The average gold grades for the three samples were 1.74g/t, 4.43g/t and 8.66g/t respectively.

All 3 gold samples returned excellent flow sheet and processing characteristics including:

  • High gravity separation and mercury amalgamation of the gravity concentrate to yield significant free liberated gravity recoverable gold (GRG) of 28.80%, 39.08% and 47.46% for composites 1 to 3 respectively.
  • High total extractable gold (via gravity plus standard leach) for composite 1 to 3 with overall gold recoveries of 95.6%, 92.6% and 98.3% respectively.
  • Fast gold leach kinetics for all gravity leach tests with the majority of the gold leaching in the first 2-4 hours.
  • Low sodium cyanide and lime consumption rates with Perth tap water for all leach tests.
  • Low levels of organic carbon decreasing the likelihood of preg-robbing of gold in solution during cyanidation.
  • Low concentrations of base metals decreasing the possibility of excess cyanide consumption through preferential complexing with these metals.
  • Low levels of arsenic, decreasing the likelihood of refractory gold deportment.
  • Low levels of antimony, thus avoiding high pH which may form passivating oxide layers on the gold surfaces, which can have a detrimental effect on gold cyanidation.

 

Bulgera Project Location Map

Map of Bulgera gold deposits /
prospects with +100m drill holes

The Bulgera project model showing target zones having potential for shear hosted gold mineralisation below 100 vertical metres

Norwest’s deep drilling success below the Bulgera open cut has encouraged the Company to plan similar exploration drilling programs below many of the historical gold deposits and prospects located across the Bulgera project tenements.

The increase in gold tenor below 100 vertical metres has not only been recognized at Bulgera but also below many other gold zones discovered along the Plutonic Well greenstone belt.

The Bulgera gold trend is the extension of the Plutonic (+5.5moz)[2] and Marymia (+1moz)[3] mafic-ultramafic mine sequence where drilling has shown that gold tenor increases with depth. The nearby Marymia (Vango Mining ASX: VAN) drilling within the mafic-ultramafic mine sequence has consistently shown that the highest gold grades are located below 100 vertical metres which is evidenced by their many ASX announcement.

The Company is now reviewing the project-wide Bulgera RC drill hole database. The aim is to identify deeper targets having potential to host gold lodes similar to the recently discovered Bulgera ‘main shear’ zone. Most of the historical gold prospects have only been tested above 100 vertical metres by RC drilling. The images above depict where deeper RC drilling has the potential to intersect one or more high-grade lodes and significantly add to the Bulgera project’s 200,000- ounce gold inventory. 

 

1. ASX: NWM – Announcement 23 September 2021, ‘Diamond drilling commences at Bulgera’

2. Superior Gold Inc., Website www.superior-gold.com & Resolute Ltd Marymia production

3. ASX: VAN – Announcement 20 May 2020, ‘Marymia Minerals Resource Increases to One Million Ounces’

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CONTACT US

Phone
(08) 6117 04657

Email
info@norwestminerals.com.au

Address
PO Box 140 West Perth WA 6872

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