Nixon Fork Overview

The Nixon Fork mine is on care and maintenance due to current market conditions


Nixon Fork Gold Mine is located in the Tintina Gold Belt


The Nixon Fork Mine History


The Nixon Fork Mine is a past producing mine with a high grade production history that was sustained over a five year period of operations.

Previously owned by Nevada Goldfields Inc. (1993 - 1999) and St. Andrew Goldfields Ltd. (2003-2008), the Nixon Fork Gold Mine was purchased by Fire River Gold Corp. from Pacific North West Capital August 13, 2009 for $3.1 million in cash and shares. The 11,000 acre property, its facilities and infrastructure have an approximate replacement value of $150 million.
 


Hagby Drill Set Up Underground



The Property

In addition to the mine, the property has a 150 tonnes per day gravity and flotation processing plant mill and a 250 tonnes per day Carbon-in--Leach (CIL) Circuit, surface and underground mobile equipment fleets, an 85 person fully equipped camp, 2 company owned drills, a self-contained power plant, water and septic systems, and a 1280 meters long landing strip.

Fire River Gold owns the Nixon Fork Mine through a wholly owned subsidiary, Mystery Creek Resources Inc. Mystery Creek has a renewable lease to explore and mine the ore bodies at Nixon Fork.

The Tintina Gold Belt province is an arc-shaped 2,000-kilometer-long metallogenic province that extends across mainland Alaska, into the Yukon and Northern BC. The Tintina Gold Belt is host to world-class deposits such as:

  • Donlin Creek (29.3 M oz Au Proven & Probable reserves)
  • Fort Knox (3.8 M oz P & P)
  • Pogo (3.6 M oz P & P)
  • Dublin Gulch (2.7 M oz Indicated resource)


Type of Deposit


The deposit on Nixon Fork Mine property is a skarn which is a carbonate - hosted deposit.

Economic skarn deposits can range from small tonnage / high grade to large tonnage/ low grade. Geochemical evidence presented by Cutler (1994) suggests the Nixon Fork skarn is genetically similar to the skarn ore bodies mined at Fortitude in Nevada. Wallis and Rennie (2005) suggested the Nixon Fork had genetic similarities to the Nickel Plate mine in British Columbia. At the Nickel Plate the underground tonnage mined was 3 million tonnes at 14 gpt gold while at Fortitude the high-grade zone contained resources of 5.1 million tonnes at 10.5 gpt gold (Meinert, 1992). Other analogs include the Buckhorn (Crown Jewel) gold skarn in Washington State.


A variety of skarn types are present at Nixon Fork. These include calcic-skarns, after limestone host rocks, and magnesium skarn after dolomites. The percentage of dolomitic host rocks is likely equal to that of limestone host rocks. In addition, skarn types can be further divided into units useful in modeling that are based on their mineralogical compositions:

  1. garnet > pyroxene skarn
  2. pyroxene > garnet skarn
  3. wollastonite skarn
  4. magnesian skarn (serpentine-phlogopite-talc-tremolite)
  5. retrograde sulfide-rich skarn.

The majority of the recent underground gold-copper production from the Nixon Fork mine area occurred in the Crystal Mine. The Crystal Mine includes five main mineralized shoots that were accessed by a decline and mined during the period 1995 to 1998 and 2006-2007. The majority of the production came from the 3000 ore shoot in 1995-98. The mineralized skarn bodies in this part of the mine range up to 6 meters in width with an average of 3 meters. The strike length of the individual shoots varies from 10 to 30 meters but these pipe-like bodies extend down dip for several hundred meters. Average grade of the mineralized bodies varies from 9 gpt up to 45 gpt Au. In the Crystal zone, silver and copper values average 27 gpt and 1.2 %, respectively. (NI 43-101 October 2010)


Nixon Fork Mine Proposed 2012 Exploration Program


The Mill

The mill is able to produce 150 tonnes a day via gravity and flotation and the CIL Circuit was designed with a capacity of 250 tpd,- higher than the gravity and flotation mill for the purpose of incorporating additional supplemental feed from the existing tailings which grades approximately 7.6 g.t (Giroux, 2010). Ore recovery is expected to be +90%.


Gravity and Flotation Circuits at the Mill


CIL Circuit under construction


Mine Development

Current Mining

Future Mining Areas

1. 3550 Zone
2. 3000 Zone
3. 3300 Zone
4. Mystery Mine



5. J5A Zone
6. Southern Cross
7. 3100 Zone


Mine Equipment Purchases (L to R: One Boom Jumbo, 4 ydł Scooptram, LH Drill)


High Grade Stockpile (left) and Medium Grade Stockpile (right) ahead of Primary Crusher



Low Grade Stockpile (to right) and Unclassified Material Piles

 
 

Nixon Fork Photo Gallery

 
 
 

Nixon Fork NI 43-101

File: http://www.firerivergold.com/i/pdf/NF-12EXE1-Form43Feb2012.pdf
 1160 KB, approx. 3 minutes, 37 seconds at 56.6Kbps