Overview
| Stage | Permitting |
| Mine Type | Underground |
| Commodities |
|
| Processing |
- Calcining
- Agitated tank (VAT) leaching
- Pressure oxidation
- Resin in leach (RIL)
- Carbon in leach (CIL)
- Elution
- Carbon adsorption-desorption-recovery (ADR)
- Solvent Extraction & Electrowinning
- Cyanide (reagent)
- Thiosulfate (reagent)
- Roasting
|
| Mine Life | 21 years (as of Jan 1, 2016) |
Starting in the first quarter of 2021, Goldrush was included as part of Cortez as management began reviewing the operating results and assessing performance on a combined level.
As part of ongoing exploration and development activities, first ore was mined in the first quarter of 2021, in line with guidance.
During 2021, underground development and exploration will continue at Goldrush. Activities in 2021 will focus on verifying geological, geotechnical and geohydrological models developed during the feasibility study until the Record of Decision (ROD) is received. Following receipt of the ROD, construction of infrastructure to allow the ramp-up of production activities will commence.
Permitting activities continued to advance largely on-track. The Notice of Intent is a significant milestone for the project and is expected in the second quarter of 2021.
Barrick continues to expect receipt of the ROD in the first quarter of 2022. |
Source:
p. 60
On March 10, 2019, Barrick entered into an implementation agreement with Newmont to create a joint venture, named Nevada Gold Mines, combining our respective mining operations, assets, reserves and talent in Nevada, USA. This includes Barrick’s Cortez, Goldstrike, Turquoise Ridge and Goldrush properties and Newmont’s Carlin, Twin Creeks, Phoenix, Long Canyon and Lone Tree properties. On July 1, 2019, the transaction closed and we began consolidating the operating results, cash flows and net assets of Nevada Gold Mines from that date forward. Barrick is the operator of the joint venture and owns 61.5%, with Newmont owning the remaining 38.5% of the joint venture.
Summary:
In 2011 the discovery of the Red Hill and Goldrush deposits was announced by Barrick. The two deposits are located four miles southeast of the Cortez Hills mine and 15 mi southeast of the Pipeline mine.
Based on the results of wide spaced drilling, Barrick originally outlined two zones of gold mineralization along a seven kilometre long trend. The mineralization is primarily hosted in a favorable carbonate unit and has a tabular geometry. Host rocks are similar to those found at Barrick’s Cortez Hills and Goldstrike mines. The majority of the mineralization intersected to date is refractory and occurs at depths between 150 m and 500 m. Continued drilling of the mineralization has shown that the two deposits are in fact joined. As a result, the deposit has been renamed Goldrush, which includes both Red Hill and the original Goldrush deposits.
Flow Sheet:
Refractory ore would be transported to Goldstrike for processing.
Processing
- Calcining
- Agitated tank (VAT) leaching
- Pressure oxidation
- Resin in leach (RIL)
- Carbon in leach (CIL)
- Elution
- Carbon adsorption-desorption-recovery (ADR)
- Solvent Extraction & Electrowinning
- Cyanide (reagent)
- Thiosulfate (reagent)
- Roasting
Flow Sheet:
Summary:
Refractory ore would be transported to Goldstrike for processing.
Goldstrike process facilities provide the capability to treat single refractory ore (sulphidic) and double refractory ore (sulphidic and carbonaceous) through roasting or pressure oxidation. The roaster circuit accommodates Goldstrike open-pit and underground ore as well as Cortez Hills Open Pit (CHOP) and Cortez Hills Underground (CHUG) ore. A blended feed to the roaster is required to control the circuit heat balance. Pressure oxidation also receives a blended feed from stockpiles and operates as either alkaline or acid POX dependent upon feed carbonate/sulphide ratios. Pressure oxidation is followed by CaTS leaching, also referred to as the Thiosulphate Leach Conversion (TLC) with an RIL adsorption circuit for gold recovery. Respective facilities include:
1. An autoclave circuit consisting of:
• Primary crushing
• Two parallel SAG Mill-Ball Mill grinding circuits with pebble crushing
Projected Production:
| Commodity | Units | Avg. Annual |
|
Gold
|
oz
| 440,000 |
All production numbers are expressed as metal in doré.
Reserves at December 31, 2020:
| Category | Tonnage | Commodity | Grade | Contained Metal |
|
Proven
|
6.34 Mt
|
Gold
|
9.69 g/t
|
1.95 M oz
|
|
Indicated
|
42.28 Mt
|
Gold
|
6.57 g/t
|
8.94 M oz
|
|
Inferred
|
19.5 Mt
|
Gold
|
6.2 g/t
|
4 M oz
|
Commodity Production Costs:
| | Commodity | Units | Average |
|
All-in sustaining costs (AISC)
|
Gold
|
USD
|
665 / oz *
|
* According to 2016 study / presentation.
2016 Study Costs and Valuation Metrics :
| Metrics | Units | LOM Total |
|
Initial CapEx
|
$M USD
|
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Mine Management:
| Job Title | Name | Email | Profile | Ref. Date |
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Nov 22, 2021
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