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Canada
J&L Project

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 Location:
32 km N from Revelstoke, British Columbia, Canada

  Project Contacts:
Suite 890, 580 Hornby Street
Vancouver
British Columbia, Canada
V6C 3B6
Phone  ...  Subscription required
Fax604-642-6577
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StagePreliminary Economic Assessment
Mine TypeUnderground
Commodities
  • Gold
  • Silver
  • Zinc
  • Lead
Mining Method
  • Longhole stoping
Processing
  • Flotation
  • Pressure oxidation
  • Dense media separation
  • Carbon in leach (CIL)
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)
Mine Life9 years (as of Jan 1, 2016)
Latest NewsRokmaster Announces Execution of an Indicative Term Sheet for an Option to Acquire the J&L Gold-Polymetallic Project From Huakan     August 16, 2019


Owners

Source:
CompanyInterestOwnership
Huakan International Mining Inc. 100 % Direct
On April 13, 2007, Huakan International Mining entered into an option agreement whereby it could acquire a 100% undivided interest in the J&L property in consideration for share issuances and cash payments totalling $10.79 million over a seven year period. In August 2010, in advance of stated terms in the agreement, the Company completed its acquisition of the J&L property and now retains 100% undivided interest. There are no NSR royalties owing to other parties.

Deposit Type

  • VMS
  • Vein / narrow vein


Summary:

The J&L Property lies at the northern end of the Kootenay Arc which is known for its Irishtype carbonate hosted Zn-Pb, volcanogenic massive sulphide (VMS) and sedimentary exhalative (Sedex) deposits. The two deposits on the J&L Property are the Main Zone and the Yellowjacket Zone.

The Main Zone is a structurally-controlled precious metal and polymetallic base metal sheeted sulphide (Au-Ag-Pb-Zn-As) deposit. The deposit has quite a reliable and predictable geometry. The zone is sheet-like or tabular with an average dip of 55° to the northeast. The zone of sheeted massive and stringer sulphide veining has an average width of 2.5 m but the sheeted sulphide veining can reach 15 m in true thickness.

The Main Zone is composed of closely spaced bands of massive sulphides which frequently coalesce at its widest parts. Individual bands, which are generally tabular, may die out along strike over tens of metres but appear to resume in an adjacent band. Individual massive sulphide bands frequently range from 5 cm to 1 m thick. Sulphide minerals include pyrite, pyrrhotite, gold-bearing arsenopyrite, iron-rich sphalerite (blackjack), galena, tetrahedrite and trace chalcopyrite. There are also traces of silver-lead-antimony and lead-antimony sulphosalts. The banding ranges from predominantly arsenopyrite (high gold), to mixed arsenopyrite and massive sulphides, to massive sphalerite with no arsenic present.


Mining Methods

  • Longhole stoping


Summary:

An underground mine plan developed by Micon comprises 1.09 million tonnes of measured resources at an average grade of 6.32 g/t Au, 65.91 g/t Ag, 4.16% Zn, and 2.28% Pb; 1.05 million tonnes of indicated resources at an average grade of 7.10 g/t Au, 66.08 g/t Ag, 3.94% Zn, and 2.04% Pb; and 2.76 million tonnes from inferred mineral resources at an average grade of 6.20 g/t Au, 72.43 g/t Ag, 3.24% Zn, and 2.22% Pb. The mine plan includes provision for mining losses and dilution. The PEA is based on a 1,500 t/d underground bulk mining operation, using ramp access. The main mining method considered is mechanized, longhole stoping with truck haulage and stope backfill using waste rock and process tailings.


Crushing and Grinding


Processing

  • Flotation
  • Pressure oxidation
  • Dense media separation
  • Carbon in leach (CIL)
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)

Flow Sheet: Subscription required

Summary:

The ore is delivered by mine trucks to the plant and fed through a grizzly with 400 mm openings to the ROM feed hopper. The ore is extracted from the feed hopper by an apron feeder and fed to a jaw crusher with an opening of 18-20 mm.

HMS may be used to selectively remove non-sulphide gangue materials by applying an SG of 2.95-3.00. By removing the lower grade material prior to the grinding circuit, the HMS plant allows the mill feed tonnage to be increased without having to increase the grinding or flotation capacity.

The HMS concentrate reporting to the grinding circuit, comprises 60% of the feed to the HMS circuit or 900 t/d of coarse sink.

The lead flotation circuit is a conventional lead-zinc differential flotation circuit. The initial lead flotation tails are cycloned, with the oversize returning to the ball mill and the fines reporting as feed to the lead scavenger circuit.

Lead rougher tailing, lead-scavenger tails, and zinc spill r ........

Recoveries & Grades:

CommodityParameterAvg. LOM
Gold Recovery Rate, %  ......  Subscription required
Gold Head Grade, g/t 6.4
Silver Recovery Rate, %  ......  Subscription required
Silver Head Grade, g/t 69.8
Zinc Recovery Rate, %  ......  Subscription required
Zinc Head Grade, % 3.6
Lead Recovery Rate, %  ......  Subscription required
Lead Head Grade, % 2.2
Subscription required - Subscription is required.

Projected Production:

CommodityProductUnitsAvg. AnnualLOM
Gold Payable metal koz 101915
Silver Payable metal koz  ......  Subscription required  ......  Subscription required
Zinc Metal in concentrate k lbs  ......  Subscription required  ......  Subscription required
Lead Metal in concentrate k lbs  ......  Subscription required  ......  Subscription required

Operational Metrics:

Metrics
Daily mining capacity 1,500 t of ore *
Daily milling capacity 1,500 t of ore *
Annual mining capacity 540 kt of ore *
Waste tonnes, LOM 1,240 kt *
Ore tonnes mined, LOM 4,896 kt *
Annual milling capacity 540 kt of ore *
* According to 2012 study.

Reserves at June 6, 2012:

CategoryTonnage CommodityGradeContained Metal
Measured 1,202,000 t Gold 6.71 g/t 259,200 oz
Measured 1,202,000 t Silver 69 g/t 2,665,000 oz
Measured 1,202,000 t Zinc 4.46 %
Measured 1,202,000 t Lead 2.4 %
Indicated 1,165,700 t Gold 6.92 g/t 259,200 oz
Indicated 1,165,700 t Silver 64.9 g/t 2,432,000 oz
Indicated 1,165,700 t Zinc 3.86 %
Indicated 1,165,700 t Lead 2.01 %
Measured & Indicated 2,367,700 t Gold 6.81 g/t 518,400 oz
Measured & Indicated 2,367,700 t Silver 66.95 g/t 5,097,000 oz
Measured & Indicated 2,367,700 t Zinc 4.16 %
Measured & Indicated 2,367,700 t Lead 2.21 %
Inferred 4,538,100 t Gold 5.19 g/t 757,500 oz
Inferred 4,538,100 t Silver 67.8 g/t 9,888,000 oz
Inferred 4,538,100 t Zinc 2.99 %
Inferred 4,538,100 t Lead 2.16 %

Commodity Production Costs:

CommodityUnits2020
Credits (by-product) Gold CAD -434 / oz *
Cash costs Gold CAD 606.04 / oz *
Cash costs Gold CAD 172.04 / oz *†
Assumed price Lead USD 0.98 / lb *
Assumed price Zinc USD 0.94 / lb *
Assumed price Silver USD 22 / oz *
Assumed price Gold USD 1,320 / oz *
* According to 2012 study / presentation.
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units2020
UG mining costs ($/t mined) CAD 58.7 *
Processing costs ($/t milled) CAD  ......  Subscription required
Total operating costs ($/t milled) CAD  ......  Subscription required
* According to 2012 study.
Subscription required - Subscription is required.

2012 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Pre-Production capital costs $M CAD  ......  Subscription required
Sustaining CapEx $M CAD  ......  Subscription required
Closure costs $M CAD  ......  Subscription required
Total CapEx $M CAD  ......  Subscription required
UG OpEx $M CAD  ......  Subscription required
Processing OpEx $M CAD 216.9
G&A costs $M CAD 50.4
Total OpEx $M CAD  ......  Subscription required
Total Taxes $M CAD  ......  Subscription required
Net revenue (LOM) $M CAD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M CAD  ......  Subscription required
After-tax Cash Flow (LOM) $M CAD  ......  Subscription required
Pre-tax NPV @ 10% $M CAD  ......  Subscription required
Pre-tax NPV @ 8% $M CAD  ......  Subscription required
After-tax NPV @ 10% $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 June 6, 2012:
HME TypeSizeQuantity
ANFO Loader 2
....................... Subscription required 1
....................... Subscription required 1
....................... Subscription required 2
....................... Subscription required 1
....................... Subscription required ....................... Subscription required 4
....................... Subscription required ....................... Subscription required 1
....................... Subscription required 1
....................... Subscription required ....................... Subscription required 4
....................... Subscription required ....................... Subscription required 2
Subscription required - Subscription is required.

Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2012

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2016
Preliminary Economic Assessment 2012
Subscription required - Subscription is required.

News:

NewsDate
Rokmaster Announces Execution of an Indicative Term Sheet for an Option to Acquire the J&L Gold-Polymetallic Project From Huakan August 16, 2019

Subscription required - Subscription is required.

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