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United States
Kettle River-Buckhorn Mine

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 Location:
10 km E from Republic, Washington, United States

  Address:
363 Fish Hatchery Road
Republic
Washington, United States
99166
Phone  ...  Subscription required
Fax(509)-775-3447
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Overview

StatusClosing / Closed
Mine TypeUnderground
Commodities
  • Gold
Mining Method
  • Cut & Fill
  • Longhole stoping
Production Start...
Mine Life2017
Kettle River-Buckhorn ceased production in 2017.


Owners

 
CompanyInterestOwnership
Kinross Gold Corp. 100 % Indirect
Echo Bay Minerals Co. (operator) 100 % Direct

Contractors

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Deposit Type

  • Skarn


Summary:

The Buckhorn Mt. gold deposit ranks among the largest "gold skarns" in North America.

Gold mineralization is associated with a variety of skarn mineral assemblages, and is concentrated in a variety of stratigraphic/structural settings. The extent of "economic" (i.e.>0.042opt Au) mineralization is described as having dimensions of about 3,000ft x 1,000ft x 800ft. Sulfide mineralization, principally pyrrhotite, is more extensive. Within the broad zone of gold mineralization, no economic concentrations of other metals have been identified. The overall Au:Ag ratio in the Buckhorn Mountain gold deposit is about 2:1.

Several discrete mineralized zones comprise the Buckhorn Mountain gold deposit. On the basis of location, geometry, associated skarn mineralogy, and perceived protolith; BMG defined four "ore" types. In order of importance with respect to the gold mineral resource, these "ore" types are:
* Southwest Zone,
* Gold Bowl Garnet,Gold Bowl Magnetite, and
* Andesite.

Gold mineralization constituting the Buckhorn Mountain gold deposit occurs within a broad zone of pyrrhotite mineralization. Macroscopically, gold in all ore types is spatially associated with occurrences of bismuth minerals and of arsenopyrite. Bismuth minerals are reported to be more abundant in the GB than in the SWZ, although gold grades are on average much higher in the SWZ. Visible gold had been considered rare overall. However, visible gold was logged in over ........


Mining Methods

  • Cut & Fill
  • Longhole stoping


Summary:

The Buckhorn Mine is a three-portal access underground mine that produces material from two separate areas, the Southwest and Gold Bowl zones. Both cut and fill and longhole stoping mining methods are employed and the current average production rate is 1,000 tonnes per day.


Crushing and Grinding


Processing

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Summary:

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Production:

CommodityUnits2017201620152014
Gold Equivalent oz 76,570112,27497,368123,382
All production numbers are expressed as metal in doré.

Operational Metrics:

Metrics20172016201520142013
Ore tonnes mined 189 kt438 kt369 kt347 kt367 kt
Tonnes processed 234 kt441 kt437 kt394 kt404 kt
Daily mining capacity 1,000 t
Daily milling capacity 2,100 t1,800 t

Reserves at December 31, 2019:

CategoryTonnage CommodityGradeContained Metal
Indicated 575 kt Gold 8.8 g/t 162 koz
Inferred 310 kt Gold 8.6 g/t 85 koz

Commodity Production Costs:

CommodityUnits20172016
Cash costs (sold) Gold Equivalent USD 477 / oz   652 / oz  

Financials:

Units20172016
Capital expenditures M USD
Revenue M USD 96.3   139.8  
Operating Income M USD 43.4   64  
Gross profit M USD 58.9   65.5  



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Feb 19, 2020
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Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2019
Annual Information Form 2018
Press Release 2018
Annual Information Form 2017
Financial Review 2017
Management Discussion & Analysis 2017
Other 2017
Annual Information Form 2016
Press Release 2016
Annual Report 2015
Annual Report 2014
Other 2014
Other 2013
Technical Report 2003
Other 1998
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