United States

Pine Grove Project

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Mine TypeOpen Pit
  • Gold
Mining Method
  • Truck & Shovel / Loader
Mine Life... Lock


Lincoln Gold Mining Inc. 100 % Indirect
Lincoln Gold US Corp. 100 % Direct
Lincoln Gold Mining Inc. is an advanced-stage gold mine exploration and development company holding a 100% interest in the Pine Grove Gold Project.

Deposit type

  • Vein / narrow vein


The Pine Grove Property is located within the Walker-Lane mineral trend. According to Stone (2008), the style of mineralization encountered at the Pine Grove project most closely resembles the “Shear Zone” subtype of the “Plutonic-Related Au Quartz Veins and Veinlets L02” deposit type as described by Lefebure and Hart (2005). In particular, the gold mineralization at the Pine Grove project has the following features in common with the “Plutonic-Related Au Quartz Veins and Veinlets L02” deposit type:

Commonly found in tectonic settings of continental margin sedimentary assemblages where intruded by plutons behind margin arcs. Typically developed late in the orogeny or post-collisional settings.

Host rocks are equigranular granodiorite with associated, highly differentiated, porphyritic dikes.

Mineralization can be divided into intrusion-related, epizonal, and shear veins. Intrusionrelated mineralization typically occurs in widespread sheeted vein arrays parallel to the major structural trends. Veins are commonly just hairline fractures to a few centimeters wide and hosted by extensional shears. Veins contain native gold, pyrite, chalcopyrite, and pyrrhotite. Gangue consists of quartz, and sulfides comprise less than 3 percent of the veins. Epizonal mineralization is typically less focused and may be disseminated or occur as replacements. The shear-vein style of mineralization may occur in fault zones outside of the pluton.

Alteration consists of biotite, albite, and sericite, and is spatially restricted to the mineralized zone.

Veins occur close to the associated granite dikes.

Mineralization within the quartz vein and stockwork zones occurs in relatively small tonnage but at relatively higher (2.042 opt) grades. Epizonal deposits have gold grades of 0.058 to 0.146 opt. Combined, these two styles of mineralization can form deposits of ten to hundreds of millions of tons.

Known gold mineralization at the Pine Grove project is found at the Wheeler and the Wilson mines. The two areas show similar alteration and mineralization characteristics but differ in their structural signatures due to differing locations relative to the Pine Grove fault. Gold is found in transitional quartz veins and in thin, crosscutting pyritechalcopyrite stockwork veinlets; the transitional quartz veins occurred between prograde potassic and albitic alteration and retrograde sericite-pyrite-quartz alteration (Jackson, 1996). Dilles (1990) reports that sulfide mineralization is also disseminated.

Hydrothermal alteration consists of early, prograde, high-temperature potassic alteration (biotization and potassium feldspar replacement), followed by an albititc (sic) alteration event, then a transitional chlorite-actinolite event that hosts the gold mineralization. The chlorite-actinolite alteration is confined to the mineralized block between the Stonehouse and Pine Grove faults. Mineralization was followed by retrograde quartz-sericite-pyrite alteration. The alteration events are telescoped and overlap each other, and for the most part are restricted to the mineralized block of granodiorite.



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Mining Methods


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Crushers and Mills

Milling equipment has not been reported.



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Operational metrics

Daily milling capacity 3,300 tons of ore *
Annual production capacity 27 koz of gold *
Waste tonnes, LOM 10,475 k tons *
Ore tonnes mined, LOM 3,374 k tons *
Total tonnes mined, LOM 13,849 k tons *
Tonnes milled, LOM 3,374 k tons of ore *
* According to 2015 study.

Production Costs

Cash costs Gold USD 843 / oz *  USD
Assumed price Gold USD 1,425 / oz *  USD
* According to 2015 study / presentation.

Operating Costs

Processing costs ($/t milled) USD 12.6 *  USD
* According to 2015 study.

Project Costs

MetricsUnitsLOM Total
Pre-Production capital costs $M USD  ......  Subscribe
Total CapEx $M USD  ......  Subscribe
G&A costs $M USD 10.2
Total OpEx $M USD  ......  Subscribe
Royalty payments $M USD  ......  Subscribe
Gross revenue (LOM) $M USD  ......  Subscribe
Net revenue (LOM) $M USD  ......  Subscribe
After-tax Cash Flow (LOM) $M USD  ......  Subscribe
After-tax NPV @ 5% $M USD  ......  Subscribe
After-tax IRR, %  ......  Subscribe

Heavy Mobile Equipment


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Mine Management

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Aerial view:


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