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United States
Betze-Post Mine (Goldstrike Operation)

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 Location:
54 NW from Elko, Nevada, United States

  Regional Office:
1655 Mountain City Hwy
Elko
Nevada, United States
89801
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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life2034
Betze-Post open pit mine is part of the Goldstrike Operation.

On July 1, 2019, Barrick's Goldstrike and Newmont's Carlin operation were contributed to the Nevada Gold Mines joint venture and are now collectively referred to as Carlin.


Owners

Source: p. 76-77
CompanyInterestOwnership
Newmont Corp. 38.5 % Indirect
Barrick Gold Corp. (operator) 61.5 % Indirect
On July 1, 2019, Barrick's Goldstrike and Newmont's Carlin operation were contributed to the Nevada Gold Mines joint venture and are now collectively referred to as Carlin.

Barrick is the operator of the Nevada Gold Mines LLC joint venture and owns 61.5%, with Newmont owning the remaining 38.5% of the joint venture.

Contractors

Subscription required - Subscription is required.


Deposit Type

  • Hydrothermal
  • Carlin-type


Summary:

The Betze-Post deposit, the largest on the Carlin Trend, is divided into sub-deposits which, from east to west, are the Deep Post, Post, Betze, West Betze, and Screamer. Other zones within the pit are North Betze, West Barrel, and North Screamer.

Five generations of pyrite mineralization have been recognized at the Betze-Post open pit. Early stages of diagenetic pyrite, and coarse-grained pyrite in the metamorphic aureole of the Goldstrike diorite, are barren. Early hydrothermal, very fine-grained pyrite and marcasite grains of the third generation are coated by a 25 µm thick rind and cut by micro-veinlets of arsenic and gold bearing pyrite of the fourth generation. Barren, late hydrothermal coarse-grained pyrite and marcasite is accompanied by barite and stibnite. Sulphides make up approximately 2% by weight of the ore, locally up to 20%.

The gold bearing arsenian pyrite may be subdivided into coarse grained sulphides at ±200 µm diameter and fined grained at 10 µm to 20 µm, with the latter carrying proportionately much more gold. Gold at 0.05 µm to 0.1 µm is occluded in the iron sulphides. Approximately 10% to 20% of the gold is free, 20% to 30% is held in the fine-grained pyrite/marcasite, a few percent (generally less than 2%) is contained in coarse pyrite, and the balance is in very fine pyrite associated with clay.

Mineralization may be predominantly oxides, sulphides, or refractory or carbonaceous sulphides. Weathering alteration extends ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Betze-Post open pit is a truck and shovel operation. With completion of the 3rd NW phase targeted for March 2019, the open pit has three remaining phases (4th NW, West Barrel, and 5th NW). The ultimate pit will measure approximately two miles east to west, 1.5 miles north to south, and have an average depth of approximately 1,300 ft.

The Bazza Waste Dump is located to the southwest of the open pit. The Life of Mine (LOM) plan includes the Clydesdale Dump to the west and backfilling of the southwest and southeast portions of the open pit. Internal to the pit is the Betze Portal, which connects to the Rodeo underground mine; the North Post Portal, which connects to North Post and Rodeo underground; and the Betze Portal 2, which is used for ventilation.

Previously the Post Portal connected to Newmont’s Deep Post underground mine, however, this area has since been backfilled.

The pit design is based on 40 ft benches in the waste and, where possible, 60 ft benches in the ore mined in 20 ft cuts. Slopes vary based on location.


Crushing and Grinding


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Combined production numbers are reported under Goldstrike Operation

Operational Metrics:

Metrics2016201520142013
Stripping / waste ratio 22.7 10.9 12.4 15
Daily mining rate 244 kt237 kt219 kt260 kt

Reserves at December 31, 2018:

CategoryTonnage CommodityGradeContained Metal
Proven 50,281 kt Gold 2.85 g/t 4,609 koz
Probable 8,706 kt Gold 3.78 g/t 1,058 koz
Proven & Probable 58,987 kt Gold 2.99 g/t 5,667 koz
Measured 1,243 kt Gold 1.4 g/t 56 koz
Indicated 1,768 kt Gold 1.04 g/t 59 koz
Measured & Indicated 3,011 kt Gold 1.19 g/t 115 koz
Inferred 214 kt Gold 2.18 g/t 15 koz

Operating Costs:

Units2018201720162015
OP mining costs ($/t mined) USD 2.091.471.61.9



Heavy Mobile Equipment as of March 22, 2019:
HME TypeModelSizeQuantity
Backhoe ....................... Subscription required ....................... Subscription required
Backhoe ....................... Subscription required
Dozer ....................... Subscription required ....................... Subscription required
Dozer (crawler) ....................... Subscription required ....................... Subscription required
Dozer (rubber tire) ....................... Subscription required ....................... Subscription required
Drill ....................... Subscription required ....................... Subscription required
Grader ....................... Subscription required ....................... Subscription required
Loader ....................... Subscription required ....................... Subscription required
Loader ....................... Subscription required ....................... Subscription required
Loader ....................... Subscription required ....................... Subscription required
Shovel (hydraulic) ....................... Subscription required ....................... Subscription required
Shovel (rope) ....................... Subscription required ....................... Subscription required
Shovel (rope) ....................... Subscription required ....................... Subscription required
Truck (haul) ....................... Subscription required 290 t ....................... Subscription required
Truck (haul) ....................... Subscription required ....................... Subscription required
Truck (haul) ....................... Subscription required ....................... Subscription required
Truck (water) ....................... Subscription required ....................... Subscription required
Truck (water) ....................... Subscription required ....................... Subscription required
Truck (water) ....................... Subscription required ....................... Subscription required
Truck (water) ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Aug 4, 2022
....................... Subscription required ....................... Subscription required Subscription required Aug 4, 2022
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Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Quarterly Report 2018
Other 2017
Quarterly Report 2017
Management Discussion & Analysis 2016
Annual Information Form 2015
Press Release 2015
Annual Report 2014
Fact Sheet 2014
Technical Report 2012
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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