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United States
Goldstrike Operation (Betze-Post Mine, Meikle Mine, Rodeo Mine)

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 Location:
52 km NW from Elko, Nevada, United States

  Regional Office:
1655 Mountain City Hwy
Elko
Nevada, United States
89801
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  • Overview
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  • Geology
  • Mining
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  • Fleet
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Overview

StageProduction
Mine TypeOpen Pit & Underground
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
  • Drift & Fill
  • Longhole stoping
  • Transverse stoping
  • Longitudinal stoping
  • Cemented backfill
Production Start...
Mine Life2034
Goldstrike consist of: Betze-Post open pit mine; Meikle and Rodeo underground mines.

On July 1, 2019, Goldstrike was contributed to Nevada Gold Mines, a joint venture between Barrick (61.5%) and Newmont (38.5%). Under this joint venture, Goldstrike is reported as part of the Carlin complex.


Owners

Source: p. 76-77
CompanyInterestOwnership
Newmont Corp. 38.5 % Indirect
Barrick Gold Corp. (operator) 61.5 % Indirect
Nevada Gold Mines LLC 100 % Direct
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

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Deposit Type

  • Carlin-type
  • Hydrothermal


Summary:

The Goldstrike deposits are Carlin style deposits. Carlin deposits comprise stratabound disseminated gold mineralization hosted by Silurian-Devonian carbonate rocks that have been metamorphosed to varying extents. The deposits are hydrothermal in origin and are usually structurally controlled. The carbonate host rocks are part of an autochthonous miogeoclinal carbonate sequence exposed as tectonic windows beneath the Roberts Mountains allochthon.

The gold mineralization is associated with silicification, argillization, and sulphide mineralization with little or no oxide mineralization remaining. In sulphide ore, the gold is intimately associated with very fine-grained pyrite and marcasite and is refractory. Over time, the pyrite oxidized, freeing the gold and making its extraction relatively easy, as in the historic Post Oxide deposit. Associated sulphide minerals include arsenopyrite, realgar, orpiment, and stibnite. Gangue minerals include quartz, calcite, and barite. Realgar and orpiment are generally low in abundance; however, these minerals are locally common in stockwork veinlets, fracture fillings, and breccia matrices.

OPEN PIT
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 recogniz ........


Mining Methods

  • Truck & Shovel / Loader
  • Drift & Fill
  • Longhole stoping
  • Transverse stoping
  • Longitudinal stoping
  • Cemented backfill


Summary:

The Goldstrike Mine consists of operating open pit and underground mines.

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 underground mine consists of 11 separate production areas stretching over a length of 12,000 ft, and a vertical distance from approximately 600 ft to 2,000 ft below surface. At the southern end of the underground zones, the pit workings cut the underground zones.

SHAFTS
There are two access shafts for the mine - the Meikle shaft and the Rodeo shaft. Both are used for personnel and materials, while, ore is only hoisted via the Meikle shaft. The Meikle shaft is approximately 1,800 ft deep, extending to the 3,700 ft level, while the Rodeo shaft is 1,300 ft deep and extends to the 4,100 ft level.

Hoist operation in both shafts is automated with human oversight provided. There are ventilation shafts and boreholes for ventilation in both the Meikle and Rodeo mines.

RAMPS
There are three ramps to surface, all three are accessed through the open pit. The Betze No. 1 portal is a fresh air intake and used for both vehicular traffic and movement of ore to the pit. The Betze No. 2 portal is an emergency exit and ........


Crushing and Grinding
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Processing

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Summary:

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Production:
On July 1, 2019, Goldstrike was contributed to Nevada Gold Mines, a joint venture between Barrick (61.5%) and Newmont (38.5%). Under this joint venture, Goldstrike is reported as part of the Carlin complex.

CommodityUnits201820172016201520142013
Gold koz 7967661,0961,053902892
All production numbers are expressed as metal in doré.
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Operational Metrics:

Metrics201820172016201520142013
Total tonnes mined 59,605 kt76,587 kt67,834 kt72,304 kt81,410 kt87,350 kt
Waste 53,387 kt73,374 kt
Stripping / waste ratio 11.5 46.6
Tonnes processed 8,075 kt8,041 kt7,361 kt6,752 kt5,307 kt6,829 kt
Daily mining rate 248.9 kt241.9 kt224.4 kt

Reserves at December 31, 2018:

CategoryOreTypeTonnage CommodityGradeContained Metal
Proven In-Situ (OP) 50,281 kt Gold 2.85 g/t 4,609 koz
Proven In-Situ (UG) 5,233 kt Gold 11.32 g/t 1,904 koz
Proven Total 55,514 kt Gold 3.65 g/t 6,513 koz
Probable In-Situ (OP) 8,706 kt Gold 3.78 g/t 1,058 koz
Probable In-Situ (UG) 3,675 kt Gold 8.07 g/t 954 koz
Probable Total 12,381 kt Gold 5.05 g/t 2,012 koz
Proven & Probable In-Situ (OP) 58,987 kt Gold 2.99 g/t 5,667 koz
Proven & Probable In-Situ (UG) 8,908 kt Gold 9.98 g/t 2,858 koz
Proven & Probable Total 67,895 kt Gold 3.91 g/t 8,525 koz
Measured In-Situ (OP) 1,243 kt Gold 1.4 g/t 56 koz
Measured In-Situ (UG) 2,329 kt Gold 9.6 g/t 719 koz
Measured Total 3,572 kt Gold 6.75 g/t 775 koz
Indicated In-Situ (OP) 1,768 kt Gold 1.04 g/t 59 koz
Indicated In-Situ (UG) 2,824 kt Gold 8.79 g/t 798 koz
Indicated Total 4,592 kt Gold 5.8 g/t 857 koz
Measured & Indicated In-Situ (OP) 3,011 kt Gold 1.19 g/t 115 koz
Measured & Indicated In-Situ (UG) 5,153 kt Gold 9.16 g/t 1,517 koz
Measured & Indicated Total 8,164 kt Gold 6.22 g/t 1,632 koz
Inferred In-Situ (OP) 214 kt Gold 2.18 g/t 15 koz
Inferred In-Situ (UG) 1,603 kt Gold 8.91 g/t 459 koz
Inferred Total 1,817 kt Gold 8.11 g/t 474 koz

Commodity Production Costs:

CommodityUnits20162015
Cash costs Gold USD 573 / oz   523 / oz  
Cash costs Gold USD 572 / oz†   522 / oz†  
All-in sustaining costs (AISC) Gold USD 715 / oz   659 / oz  
All-in sustaining costs (AISC) Gold USD 714 / oz†   658 / oz†  
All-in costs Gold USD 755 / oz   739 / oz  
All-in costs Gold USD 754 / oz†   738 / oz†  
† Net of By-Product.

Operating Costs:

Units201720162015
OP mining costs ($/t mined) USD 1.471.61.9
UG mining costs ($/t mined) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Processing costs ($/t milled) USD  ......  Subscription required  ......  Subscription required
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Financials:

Units2016
Capital expenditures M USD 216  
Revenue M USD 1,389  
After-tax Income M USD 442  
EBITDA M USD 749  



Heavy Mobile Equipment as of March 22, 2019:
HME TypeModelSizeQuantity
Backhoe ....................... Subscription required
Crane ....................... Subscription required ....................... Subscription required
Dozer (crawler) ....................... Subscription required ....................... Subscription required
Dozer (crawler) ....................... Subscription required ....................... Subscription required
Dozer (crawler) ....................... Subscription required ....................... Subscription required
Dozer (rubber tire) ....................... Subscription required ....................... Subscription required
Drill ....................... Subscription required
Drill (blasthole) ....................... Subscription required ....................... Subscription required
Grader ....................... Subscription required ....................... Subscription required
Grader ....................... Subscription required ....................... Subscription required
Jumbo ....................... Subscription required
Loader ....................... Subscription required 9 cu. m ....................... Subscription required
Loader ....................... Subscription required ....................... Subscription required
Loader ....................... Subscription required ....................... Subscription required
Loader ....................... Subscription required 3.5 cu. yd ....................... Subscription required
Loader ....................... Subscription required ....................... Subscription required
Loader ....................... Subscription required ....................... Subscription required
Loader ....................... Subscription required ....................... Subscription required
Personnel Carrier ....................... Subscription required
Rock bolter ....................... Subscription required
Scissor Lift ....................... Subscription required ....................... Subscription required
Shovel (hydraulic) ....................... Subscription required ....................... Subscription required
Shovel (hydraulic) ....................... Subscription required ....................... Subscription required
Shovel (rope) ....................... Subscription required ....................... Subscription required
Shovel (rope) ....................... Subscription required ....................... Subscription required
Truck (fuel / lube) ....................... Subscription required ....................... Subscription required
Truck (haul) ....................... Subscription required ....................... Subscription required
Truck (haul) ....................... Subscription required 290 t ....................... Subscription required
Truck (haul) ....................... Subscription required ....................... Subscription required
Truck (underground) 30 t ....................... 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
Truck (water) ....................... Subscription required ....................... Subscription required
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Aug 4, 2022
....................... Subscription required ....................... Subscription required Subscription required Aug 4, 2022
....................... Subscription required ....................... Subscription required Subscription required Aug 4, 2022
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Staff:

EmployeesYear
Subscription required 2020
Subscription required 2019
Subscription required 2018
Subscription required 2017
Subscription required 2016

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Other 2018
Other 2018
Quarterly Report 2018
Operations & Technical Update 2017
Other 2017
Quarterly Report 2017
Technical Report 2017
Management Discussion & Analysis 2016
Press Release 2016
Annual Report 2015
Press Release 2015
Annual Information Form 2014
Annual Report 2014
Corporate Presentation 2014
Technical Report 2012
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