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United States
Haile OP Mine (Haile Operation)

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 Location:
5.5 km NE from Kershaw, South Carolina, United States

  Address:
6911 Snowy Owl Road
P.O. Box 128
Kershaw
South Carolina, United States
29067
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  • Overview
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  • Fleet
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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life13 years (as of Jan 1, 2021)


Owners

Source: p. 17
CompanyInterestOwnership
OceanaGold Corp. 100 % Indirect
Haile Gold Mine Inc. (operator) 100 % Direct
The Haile Gold Mine is 100% owned and operated by OceanaGold. Haile Gold Mine Inc. (HGM) is a wholly owned subsidiary of OceanaGold Corporation (OceanaGold).

Contractors

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Deposit Type

  • Sediment-hosted
  • Epithermal


Summary:

Haile is situated within the northeast-trending Carolina Terrane, also known as the Carolina Slate Belt, which hosts the past-producing Ridgeway, Brewer and Barite Hill gold mines in South Carolina. Haile is the largest gold deposit in the eastern USA. The Haile district consists of nine gold deposits within a 3.5 km by 1 km area. Haile occurs within a variably deformed ENE-trending structural zone at or near the contact between metamorphosed Neoproterozoic volcanic and sedimentary rocks. Haile is hosted in laminated siltstones and minor volcanic rocks of the Upper Persimmon Fork Formation and is dissected by barren NNW-striking diabase dikes. Deformation includes brittle and ductile styles with ENE-trending foliation, faults, brecciation, and isoclinal folds. Sedimentary rocks are folded within an ENE-trending anticlinorium with a steep SE limb and a gentle NW limb. Gold mineralization is assumed at ~549 Ma based on closely associated molybdenite dated using Re-Os (Mobley et al., 2014), which postdates peak volcanism and predates the Alleghanian greenschist facies metamorphic deformation. Pressure shadows around pyrite grains, stretched pyrite and pyrrhotite grains, and flattened hydrothermal breccia clasts indicate that there has been deformation subsequent to sulphide mineralization. These observations are consistent with either pre- or syn-tectonic gold mineralization. Interpreted timing of gold mineralization coincides with a major tectonostratigraphic change from ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

Haile is currently being mined using conventional open pit methods and OceanaGold plans to continue with current mining methods. The material encountered at Haile is a combination of soft (Costal Plains Sands [CPS] and saprolite) and hard (metavolcanics and metasediments) rock units.

CPS is loosely consolidated sand which can be mined without the need for drilling and blasting. Mineralization is not present in CPS thus drilling for the purposes of ore control and waste classification is not necessary. Saprolite is mined without blasting where possible. Saprolite is sampled for waste classification to meet the requirements in Haile’s Overburden Management Plan (OMP).

Drilling and blasting are required in all hard rock. Drilling and blasting are performed on 10 m benches. Multiple bit sizes (115 mm, 171 mm, 200 mm) are used depending on material type and application. Blast hole depth is 10 m plus subdrill; subdrill ranges from 1.4 m to 1.9 m.

The number of samples taken per blasthole is material-type dependent. Blastholes in waste are typically sampled twice on 5m intervals (top half and bottom half). Blastholes in ore are typically sampled three times at 3.3 m sample intervals.

Flitch height is variable. Waste is typically mined on a 10 m flitch and ore is typically mined on a 3.3 m flitch. Ore is usually mined with hydraulic backhoe excavators, while the majority of waste is mined with hydraulic shovels. Front-end loaders may be us ........


Crushing and Grinding
Flow Sheet: Source

A relatively compact Run of Mine (ROM) area is provided for storage and re-handling of ore allowing blending to minimize variation of head grade (sulfur and gold) and rock type, into the crusher. Ore is rehandled into the crusher dump pocket by Front End Loader (FEL).

Ore is reclaimed by an apron feeder onto a vibrating grizzly that delivers scalped oversize to the primary jaw crusher to reduce the ore size from RoM to minus 100 mm. Crushed ore is conveyed for surge and storage of the recombined grizzly undersize fines and primary crushed ore in a coarse ore surge bin or diverted on to an open conical emergency stockpile for later reclaim by Front End Loader (FEL) into a reclaim bin.

Ore is reclaimed from either the surge or reclaim bins, separately or simultaneously, using apron feeders onto a SAG mill feed conveyor belt delivering into the SAG mill feed chute.

Ore is milled in the SAG–Ball Mill-Pebble Crusher (SABC) circuit. The SAG mill operates in closed circuit with a vibrating discharge screen and a pebble return circuit incorporating a surge bin and Sandvik CH-440 cone crusher. The ball mill operates in closed circuit with hydrocyclones to produce the desired grinding product size of 75 microns.

Selected flotation reagents are added in the grinding circuit. A portion of the grinding circuit ball mill circulating load is treated in a flash flotation cell with the concentrate going to the regrind circuit. The grinding circuit product passes to a bank of bulk rougher flotation cells to recover the balance of the sulfide mineralization. Thereafter, the combined flash and rougher flotation concentrates are reground in a two-stage circuit utilizing an ETM-1500 tower mill in closed circuit with cyclones to a P80 under 40 microns and then followed by an M10000 Isamill in closed circuit with cyclones to a target P80 of 13 microns.


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:

CommodityUnits202220212020201920182017
Gold koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required132118
Silver koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics20212020201920182017
Total tonnes mined  ......  Subscription required  ......  Subscription required24,947 kt
Ore tonnes mined  ......  Subscription required  ......  Subscription required3,217 kt2,780 kt2,710,469 t
Waste  ......  Subscription required  ......  Subscription required21,730 kt13,913 kt16,475,134 t
Tonnes milled  ......  Subscription required  ......  Subscription required3,204 kt2,392 kt1,836,086 t
Annual processing capacity  ......  Subscription required  ......  Subscription required2.3 Mt
Subscription required - Subscription is required.

Reserves at December 31, 2021:
Mineral Reserves: the primary cut-off grade is 0.5 g/t Au while oxide material is assigned a 0.6 g/t Au cut-off grade.

Mineral Resources: OP primary cut-off 0.45 g/t Au, oxide cut-off 0.55 g/t Au.

CategoryTonnage CommodityGradeContained Metal
Proven 4.4 Mt Gold 1.26 g/t
Proven 4.4 Mt Silver 1.98 g/t
Probable 37.6 Mt Gold 1.62 g/t
Probable 37.6 Mt Silver 2.44 g/t
Proven & Probable 42 Mt Gold 1.58 g/t 2.14 M oz
Proven & Probable 42 Mt Silver 2.39 g/t 3.23 M oz
Measured 4.5 Mt Gold 1.22 g/t
Measured 4.5 Mt Silver 1.96 g/t
Indicated 43 Mt Gold 1.55 g/t
Indicated 43 Mt Silver 2.41 g/t
Measured & Indicated 47.5 Mt Gold 1.52 g/t 2.32 M oz
Measured & Indicated 47.5 Mt Silver 2.37 g/t 3.61 M oz
Inferred 5.7 Mt Gold 1 g/t 0.2 M oz
Inferred 5.7 Mt Silver 1.3 g/t 0.24 M oz

Commodity Production Costs:

CommodityUnits202220212020201920182017
Cash costs (sold) Gold USD  ......  Subscription required ^†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 499 / oz†   272 / oz†  
All-in sustaining costs (sold) Gold USD  ......  Subscription required ^†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 903 / oz†   509 / oz†  
^ Guidance / Forecast.
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units20212020201920182017
OP mining costs ($/t mined) USD 2.842.753.683.22.31
Processing costs ($/t milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Financials:

Units20222021202020182017
Capital expenditures (planned) M USD  ......  Subscription required
Sustaining costs M USD  ......  Subscription required  ......  Subscription required 2.8  
Growth Capital M USD  ......  Subscription required
Capital expenditures M USD  ......  Subscription required  ......  Subscription required
Revenue M USD 168.3  
EBITDA M USD 104.8  
Subscription required - Subscription is required



Heavy Mobile Equipment as of December 31, 2021:
HME TypeModelQuantityLeased or
Contractor
Compactor ....................... Subscription required ....................... Subscription required Leased
Dozer (crawler) ....................... Subscription required ....................... Subscription required Leased
Dozer (rubber tire) ....................... Subscription required ....................... Subscription required Leased
Drill ....................... Subscription required ....................... Subscription required Leased
Drill ....................... Subscription required ....................... Subscription required Leased
Excavator ....................... Subscription required ....................... Subscription required Leased
Excavator ....................... Subscription required ....................... Subscription required Leased
Grader ....................... Subscription required ....................... Subscription required Leased
Grader ....................... Subscription required ....................... Subscription required Leased
Loader ....................... Subscription required ....................... Subscription required Leased
Loader (FEL) ....................... Subscription required ....................... Subscription required Leased
Truck (haul) ....................... Subscription required ....................... Subscription required Leased
Truck (haul) ....................... Subscription required ....................... Subscription required Leased
Truck (water) ....................... Subscription required Leased
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jun 8, 2022
....................... Subscription required ....................... Subscription required Subscription required May 12, 2022
....................... Subscription required ....................... Subscription required Subscription required May 12, 2022
....................... Subscription required ....................... Subscription required Subscription required Jun 8, 2022
....................... Subscription required ....................... Subscription required Subscription required Jun 8, 2022
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2021
Subscription required 2020
Subscription required 2019
Subscription required 2018
Subscription required 2017
Subscription required 2016

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Annual Information Form 2018
Corporate Presentation 2018
Management Discussion & Analysis 2018
Press Release 2018
Press Release 2018
Press Release 2018
Year-end Mineral Reserves 2018
Corporate Presentation 2017
Corporate Presentation 2017
Feasibility Study Report 2017
Management Discussion & Analysis 2017
Annual Information Form 2016
Feasibility Study Report 2016
Subscription required - Subscription is required.

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