• Data Access
  • Your Email  
  • Your Email  
Keep me signed in.
Forgot your password?
Close
  • Forgot Your Password?
  • Enter the email you signed up with and we'll email it to you.
  • Your Email  
Close
Back
MDO
Mining Data Solutions
  • Home
  • Database
  • Subscribe
  • Sign In
  • Sign In
Canada
Goldboro Expansion Project (Goldboro Project)

This page is not tailored to
devices with screen width under 750 px.
 Location:
54 km SE from Antigonish, Nova Scotia, Canada

  Project Contacts:
20 Adelaide St. East Suite 915
Toronto
Ontario, Canada
M5C 2T6
Phone  ...  Subscription required
Fax(416) 363-4567
EmailEmail
WebsiteWeb
Additional Resources for Suppliers & Investors
Drill results over 30 g/t Au
Stay on top of recent discoveries.
Search drill results by commodity and grade.
Largest mines in the Americas
Mining and mill throughput capaciites.
Full profiles of select mines and projects.
Deepest underground mines
Shaft depth and mill throughput data.
Full profiles of select mines and projects.
Heavy mobile equipment
HME type, model, size and quantity.
Full profiles of select mines and projects.
Permitting and construction projects
Projects at the permitting or construction stage. Full profiles of select projects.
Mines with remote camps
Camp size, mine location and contacts.
Full profiles of select mines and projects.
Mines & projects in Canada
A list of country's mines and projects.
Full profiles of select mines and projects.
  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

Thank you for browsing through mine profiles compiled by the Mining Data Online team.

Would you like to subcribe or schedule a Demo?
  • Name:
     
  • Company:
     
  • Position:
     
  • Phone:
  • Email:
  • Message:

Overview

StagePreliminary Economic Assessment
Mine TypeUnderground
Commodities
  • Gold
Mining Method
  • Longhole open stoping
  • Longitudinal retreat
  • Cemented backfill
Mine Life11 years (as of Jan 1, 2021)
The PEA is based on a conventional truck-shovel open pit mining operation within two pits that transition to underground mining in year 6.

The Goldboro Project has potential for further Mineral Resource expansion, particularly towards the west along strike and at depth. A future study will consider upgrading and expanding potentially mineable underground Mineral Resources as part of the longer-term mine development plan.


Owners

Source: p. 5,17
CompanyInterestOwnership
Signal Gold Inc. 100 % Indirect
The Goldboro Project is 100% - owned by Signal Gold Inc.

The Goldboro Project is registered to the Signal Gold subsidiary Goldboro Gold Mines Inc. (previously Orex Exploration Inc.).

Contractors

Subscription required - Subscription is required.


Deposit Type

  • Vein / narrow vein
  • Orogenic
  • Metamorphic hosted


Summary:

The Deposit is a turbidite-hosted orogenic gold deposit hosted within a sequence of alternating argillites and greywacke metamorphosed to greenschist facies. The metasedimentary units on the Property are folded into the tight, gently east-plunging Upper Seal Harbour Anticline and gold mineralization has typically been deposited at various positions and times during the fold formation process. Veins, which form during deformation, occur in three major geometries commonly referred to as reefs: saddle reefs, leg reefs, and spur reefs. The Deposit contains all three types of reefs outlined above but is also characterized by mineralization within the argillite forming the Belts. Because the Deposit contains saddle, leg, and spur reefs, and often has gold mineralization within the argillite hosting the veins, it has the potential to contain significantly more gold resources than deposits of a similar style that contain gold only within the quartz veins (reefs) themselves. The trace of the Upper Seal Harbour Anticline transects the Property and is found near the Dolliver Mountain prospect 2 km to the west of the Deposit, demonstrating that the structure which hosts gold continues for several kilometres.

At the Deposit, the Goldenville Formation consists of alternating greywacke and argillite beds with an approximate true thickness of 950 m. The base of the stratigraphic sequence intersected in the BR Gold System consists of roughly 325 m of alternating greywacke and argil ........


Mining Methods

  • Longhole open stoping
  • Longitudinal retreat
  • Cemented backfill


Summary:

The PEA is based on a conventional truck-shovel open pit mining operation within two pits that transition to underground mining in year 6.

The mining method was selected based on economic and geotechnical parameters, ensuring it was suitable for the mineralization geometry. Longitudinal retreat longhole open stoping (LHOS) with cemented paste backfill was ultimately selected due to its relatively low cost, ability to accommodate narrow vein mineralization, and ability to mine close to the open pits without causing excessive instability. Stope dimensions were designed as 15 m in length (along strike), 20 m in height (level spacing), an average true thickness of 2.6 m (hanging wall to footwall) and an average dip of 70.6 degrees.

Stopes are accessed via overcut and undercut stope access development drifts, with associated drilling and blasting activities performed from the overcut and mucking from the undercut. Stope sequencing is based on a longitudinal retreat, progressing from the outward extents of the level, and retreating inward to the level access and ramp. The underground has been sequenced in a bottom-up manner, assuming all stopes on a level are excavated laterally before progressing vertically; however, the option to use a combination of lateral and vertical (half pyramid) sequencing is also viable.

External dilution was considered for the hanging wall and footwall of stopes. Due to the overall high rock mass quality of the deposit, e ........


Crushing and Grinding
Flow Sheet: Source

ROM mineralized material is transported from the mine to the process plant by haul trucks. The ROM bin is fitted with a static grizzly to keep large oversize rocks from blocking the primary crusher. A vibrating grizzly feeder ahead of the of the primary jaw crusher is used to screen out the finer material and feed the jaw crusher. The primary crusher product combines with the grizzly feeder undersize and is conveyed to a secondary screen. Screen oversize is fed to a secondary cone crusher and the secondary crushed product is combined with the secondary screen undersize. The tertiary crusher operates in closed circuit with a tertiary screen. The undersize from the tertiary screen is conveyed to the mill feed stockpile with 80% of the design particle size distribution passing an aperture of 8.2 mm.

Crushing circuit product is conveyed to a covered mill feed stockpile. The stockpile is designed to have a live capacity of 12 hours or 2,000 tonnes.

Mill feed from the stockpile is reclaimed by two belt feeders. The feeders transfer the mill feed onto the ball mill feed conveyor which discharge the ore directly into the ball mill. Process water is added to the conveyor discharge to create a slurry in the ball mill. The mill feed chute also receives oversized material from the gravity scalping screen and the underflow from the hydrocyclone cluster. The mill is operated in closed circuit where the product is discharged into a common pumpbox with independent pumps for both the hydrocyclone cluster and the gravity circuit and includes a trommel for scat removal. Material that is too coarse will be classified by the hydrocylone and will report back to the ball mill for further size reduction.

The cyclone cluster is configured to achieve a target design cyclone overflow product sizing of 80% passing of 100 µm. Leach testing showed that this product size is sufficient to achieve design recoveries. The cyclone cluster will have pneumatically actuated valves that allow automated feed pressure control as well as manually actuated isolation valves.

Slurry from the cyclone cluster underflow launders flow directly back to the ball mill while the cyclone overflow slurry from the cyclone cluster gravity flows to a trash screen.


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityUnitsLOM
Gold M oz 0

Operational Metrics:

Metrics
Daily ore mining rate  ......  Subscription required
Waste tonnes, LOM  ......  Subscription required
Ore tonnes mined, LOM  ......  Subscription required
Tonnes processed, LOM  ......  Subscription required
* According to 2021 study.
Subscription required - Subscription is required.

Reserves at February 7, 2021:
Underground Mineral Resource is reported at a cut-off grade of 2.60 g/ Au.

CategoryOreTypeTonnage CommodityGradeContained Metal
Measured In-Situ (UG) 1.384 Mt Gold 7.36 g/t 327.7 koz
Indicated In-Situ (UG) 2.772 Mt Gold 5.93 g/t 528.6 koz
Measured & Indicated In-Situ (UG) 4.156 Mt Gold 6.41 g/t 856.2 koz
Inferred In-Situ (UG) 3.726 Mt Gold 5.92 g/t 709.1 koz

Commodity Production Costs:

CommodityUnitsAverage
Assumed price Gold USD  ......  Subscription required
* According to 2021 study / presentation.
Subscription required - Subscription is required.

Operating Costs:

Units2021
UG mining costs ($/t mined) CAD 92.5 *  
UG mining costs ($/t milled) CAD  ......  Subscription required
* According to 2021 study.
Subscription required - Subscription is required.

2021 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
UG OpEx $M CAD  ......  Subscription required
Subscription required - Subscription is required.

Water Supply
Source: Subscription required

- subscription is required.


Heavy Mobile Equipment:

Mine Management:

Job TitleNamePhoneProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jun 23, 2021
....................... Subscription required ....................... Subscription required Subscription required Jun 23, 2021
....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Apr 11, 2023
....................... Subscription required ....................... Subscription required Subscription required Apr 11, 2023
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2021

Corporate Filings & Presentations:

DocumentYear
Annual Information Form 2022
Management Discussion & Analysis 2022
Press Release 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
Annual Information Form 2018
Preliminary Economic Assessment 2018
Press Release 2018
Press Release 2018
Preliminary Economic Assessment 2014
Subscription required - Subscription is required.

Subscription required - Subscription is required.

Terms of Use Privacy Policy © 2017-2023 MDO Data Online Inc.