• 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
Spectrum-GJ Project

This page is not tailored to
devices with screen width under 750 px.
 Location:
88 km S from Dease Lake, British Columbia, Canada

  Project Contacts:
Suite 650, 1021 West Hastings Street
Vancouver
British Columbia, Canada
V6E 0C3
Phone  ...  Subscription required
Fax(604)-558-7695
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
  • Fleet
  • 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 TypeOpen Pit
Commodities
  • Copper
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Mine Life25 years (as of Jan 1, 2017)
The Spectrum-GJ Cu-Au project area comprises a combination of the properties: the Spectrum property and the GJ property.

On May 1, 2020, Skeena reported the closing of the asset purchase agreement between Skeena and Newcrest Red Chris Mining Limited (“Newcrest”) dated February 3, 2020 to sell 100% of the Company’s interest in the GJ Copper-Gold Property (the “GJ Property”) to Newcrest for C$7.5 million paid in cash, and the assumption by Newcrest of future payment obligations and royalties on the GJ Property.

On April 8, 2021, Skeena announced that a new conservancy to protect the environmental and wildlife of Tahltan territory had been created in an area of northwest BC known as the Ice Mountain Lands, also known as the Spectrum property. Skeena returned its mineral tenures on the Spectrum property, enabling the Tahltan Central Government (“TCG”), Skeena, the Nature Conservancy of Canada and BC Parks Foundation to collaborate and create this conservancy.


Owners

Source: p. 1
CompanyInterestOwnership
Skeena Resources Ltd. 100 % Direct
Skeena Resources Limited holds a 100% interest in the Spectrum property and an option to acquire a 100% interest in the adjoining GJ property.

On May 1, 2020, Skeena reported the closing of the asset purchase agreement between Skeena and Newcrest Red Chris Mining Limited (“Newcrest”) dated February 3, 2020 to sell 100% of the Company’s interest in the GJ Copper-Gold Property (the “GJ Property”) to Newcrest for C$7.5 million paid in cash, and the assumption by Newcrest of future payment obligations and royalties on the GJ Property.

Contractors

Subscription required - Subscription is required.


Deposit Type

  • Porphyry
  • Vein / narrow vein


Summary:

The Project Area hosts two principal styles of mineralization that have been the target of past and current exploration. The first and older style is porphyry Cu-Au mineralization related to intrusion and alteration by Late Triassic alkalic to sub-alkalic diorite to monzonite dykes and stocks exemplified by the Central Zone and Donnelly Deposit. The second comprises later, structurallyhosted and high-grade gold zones associated with shearing, fracture zones and quartz-carbonate vein/fault controlled pyrite, arsenopyrite, sphalerite, galena and chalcopyrite hosted by altered volcanic units and monzonite dykes.

Porphyry-Style Mineralization - Central Zone
Porphyry-style Cu-Au mineralization occurs within a north-south trending, moderately west dipping and fault-bounded structural panel of Triassic Stuhini volcaniclastic lithologies intruded by syn- to late-mineral monzonite dykes. Porphyry- style mineralization has been defined over a strike length of 1,000 m, with widths of 70 m to 200 m, it has been tested to 400 m downdip and it remains open along strike and downdip.

Mineralization occurs as quartz-pyrite-chalcopyrite with or without magnetite veinlets, stockworks, fracture fills and fine grained disseminations of pyrite and chalcopyrite. Metal grades appear to be directly related to the abundance of quartz-sulphide-magnetite vein development.

Porphyry-Style Mineralization - Donnelly Deposit
Of the many porphyry Cu-Au prospects l ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

Conventional truck and shovel open pit mining was selected because, overall, it represents the least risk, most sustainable option from both economic and environmental perspectives.


Crushing and Grinding
Flow Sheet: Source


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityUnitsLOM
Copper B lbs 1
Gold M oz  ......  Subscription required
Silver M oz  ......  Subscription required
All production numbers are expressed as payable metal.

Operational Metrics:

Metrics
Stripping / waste ratio 0.71 *
Daily milling capacity 30,000 t *
Waste tonnes, LOM 134.71 Mt *
Ore tonnes mined, LOM 217.23 Mt *
Total tonnes mined, LOM 351.14 Mt *
Tonnes milled, LOM 213.74 Mt *
* According to 2017 study.

Reserves at January 6, 2017:

CategoryTonnage CommodityContained Metal
Indicated 246.4 Mt Copper 1,303 M lbs
Indicated 246.4 Mt Gold 3.08 M oz
Indicated 246.4 Mt Silver 15.67 M oz
Inferred 58.1 Mt Copper 161.5 M lbs
Inferred 58.1 Mt Gold 0.73 M oz
Inferred 58.1 Mt Silver 2.98 M oz

Commodity Production Costs:

CommodityUnitsAverage
Cash costs Copper USD 1.37 / lb *†  
Cash costs Gold USD 461.56 / oz *†  
All-in costs Copper USD 1.81 / lb *†  
All-in costs Gold USD 730.97 / oz *†  
Assumed price Copper USD 2.75 / lb *  
Assumed price Silver USD 17.8 / oz *  
Assumed price Gold USD 1.25 / oz *  
* According to 2017 study / presentation.
† Net of By-Product.

Operating Costs:

Units2017
Total operating costs ($/t milled) CAD 14.3 *
* According to 2017 study.

2017 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Pre-Production capital costs $M CAD  ......  Subscription required
Sustaining CapEx $M CAD  ......  Subscription required
Total CapEx $M CAD  ......  Subscription required
After-tax Cash Flow (LOM) $M CAD  ......  Subscription required
Pre-tax NPV @ 8% $M CAD  ......  Subscription required
After-tax NPV @ 8% $M CAD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
After-tax IRR, %  ......  Subscription required
Pre-tax payback period, years  ......  Subscription required
After-tax payback period, years  ......  Subscription required
Subscription required - Subscription is required.


Proposed Heavy Mobile Equipment as of April 20, 2017:
HME TypeModelQuantity
ANFO Loader ....................... Subscription required
....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
Preliminary Economic Assessment 2017
Technical Report 2016
Technical Report 2014
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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