Case Study: Project History

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The following project history is modified from Mitchell (1989), Woodman (2004a, b), Kennedy and Yule (2010), and Yule (2012, 2013, 2014, 2015).
1868: E.R. Faribault
E.R. Faribault observed gold mineralized rocks in the Salmon River area in 1868.
1880: Mr. George Stewart and Mr. Alex Kent
A shaft was sunk into a bedding parallel auriferous quartz vein at the Salmon River property. When mined at depth, this vein was discovered to be a saddle reef-type vein along a fold hinge.
1881-1925: Various
Sporadic mining occurred in the Salmon River area, with gold production estimated to have been more than 35,000 ounces. The 6 m-thick No.2 South Vein was the focus of most of the mining and was stoped across the crest of the host anticline. Mismanagement during this time period resulted in
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2000-2002: Envirogold Technologies Inc.
Envirogold resumed underground mining of the upper three saddles at the Dufferin Mine in 2001. Production was reported as 55,172 tons milled and 7,397 ounces of gold poured, with most of the production coming from the second saddle-reef vein and some production from the third vein. Envirogold ceased operations in 2002, citing poor mill recoveries.
2003: Azure Resources Corp.
Azure acquired the Dufferin Mine and dewatered it in 2003. They sampled the first and second (shallowest) saddles, mapped the surface geology, surveyed the tailings pile, completed metallurgical studies and refurbished the camp and mill. They mined ore from the first, second, and third saddles, and constructed a ramp to the fourth saddle. They recovered ca. 1,600 ounces of gold.
2006: Jemma Resources
Jemma Resources changed the mill at the Dufferin Mine to a gold flotation circuit and reprocessed the tailings material, with a total of 1,601.9 ounces of gold recovered from 31,745 tons of tailings.

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