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Australia
Hillgrove Mine

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 Location:
23 km E from Armidale, New South Wales, Australia

  Address:
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Reserves
  • Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit & Underground
Commodities
  • Gold
  • Antimony
Processing
  • Gravity separation
  • Centrifugal concentrator
  • ACACIA reactor
  • Filter press plant
  • Flotation
  • Agitated tank (VAT) leaching
  • Solvent Extraction & Electrowinning
Mine Life5 years (as of Jan 1, 2020)
Red River started gold production from the Hillgrove mine’s Bakers Creek stockpile in December 2020 and trucked its first load of gold concentrate from the mine on June 18 2021.

Red River has undertaken a detailed review in preparation for the restart of the Hillgrove Gold Project. The outcome of the review was a lean capital efficient staged restart process, with Stage One (processing of Bakers Creek Stockpile) scheduled to commence at the end of CY2020, and Stage Two (full restart of UG mining operations) scheduled to commence at the end of CY2021.
Latest NewsRed River marks Hillgrove restart with first gold pour     March 1, 2021


Owners

Source:
CompanyInterestOwnership
Red River Resources Ltd. 100 % Indirect
Red River acquired the Hillgrove Gold Project in August 2019 from a private vendor.

Deposit Type

  • Orogenic
  • Vein / narrow vein


Summary:

Orogenic gold-antimony-tungsten mineralisation at Hillgrove is hosted in multiple steeply dipping vein/shear systems contained within the Hillgrove Mineral Field. There is a strong zonation in the vein systems transitioning from shallow antimony dominant mineralisation to gold dominant mineralisation at depth. All known vein systems are open at depth, with potential transition to high grade gold dominant mineralisation at depth.

The Hillgrove Mineral Field covers approximately 9km x 6km, with more than 200 individual mineral occurrences identified in field. Red River controls the entirety of the Hillgrove Mineral Field and holds 225km2 of exploration leases and 17km2 of mining leases (or equivalent).


Mining Methods


Summary:

UG Operations will commence in the Metz Mining Centre, allowing Red River to take advantage of the existing UG development & infrastructure to target the high-grade Lode systems (Syndicate, Blacklode & Sunlight).

The Metz Mining Centre is currently on active care & maintenance, with all infrastructure (ventilation, power, water) in place to support near term restart of mining. Previous owners invested significant capital in development the Metz Mining Centre, with approximately 3,950m of declines and capital development, 3,400m of ore drives in the Syndicate Lode, 500m of ore drives in Blacklode and 320m of ore drives in Cox’s Lode.


Crushing and Grinding


Processing

  • Gravity separation
  • Centrifugal concentrator
  • ACACIA reactor
  • Filter press plant
  • Flotation
  • Agitated tank (VAT) leaching
  • Solvent Extraction & Electrowinning

Flow Sheet: Subscription required

Summary:

Red River estimates more than $200 million has been invested in the Hillgrove Gold Project since 2004 in the following key areas:
• 250ktpa capacity processing plant (constructed in 2008/2009), capable of producing saleable gold and gold-antimony concentrates. Additional antimony alkali leach and electrowinning circuit, pressure oxidation circuit, gold cyanide leach circuit and gold room;
• Offices, warehouses, assay lab and maintenance facilities;
• Underground mining fleet and surface vehicle fleet;
• Lined tailing storage facility with approximately 2 years capacity; and
• Extensive underground development (>10km).

Hillgrove Processing Plant will produce a gold-antimony concentrate, a gold concentrate and a gold doré. Red River will also examine the potential to produce a saleable tungsten concentrate from the scheelite (CaWO4) mineralisation in the Metz Mining Centre.



Reserves at July 29, 2020:

CategoryTonnage CommodityGrade
Measured 413 kt Gold 3.5 g/t
Measured 413 kt Antimony 4.2 %
Measured 413 kt Gold Equivalent 10.3 g/t
Indicated 2,303 kt Gold 4.8 g/t
Indicated 2,303 kt Antimony 1.5 %
Indicated 2,303 kt Gold Equivalent 7.1 g/t
Inferred 2,235 kt Gold 4 g/t
Inferred 2,235 kt Antimony 1 %
Inferred 2,235 kt Gold Equivalent 5 g/t
Total Resource 4,951 kt Gold 4.3 g/t
Total Resource 4,951 kt Antimony 1.5 %
Total Resource 4,951 kt Gold Equivalent 6.4 g/t

Financials:

Units2020
Operating Income M AUD  ......  Subscription required
Subscription required - Subscription is required


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jun 25, 2021
....................... Subscription required ....................... Subscription required Subscription required Jun 25, 2021
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2020
................................... Subscription required 2019
Subscription required - Subscription is required.

News:

NewsDate
Red River marks Hillgrove restart with first gold pour March 1, 2021
Red River initiates Hillgrove gold production January 4, 2021
Red River to start gold production before year’s end October 22, 2020
Red River plots Hillgrove gold restart with acquisition July 3, 2019

Aerial view:

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