Question: What mine were gold producers located in the Northwest Territories, Canada at Yellowknife, Ruth Mine or Ptarmigan and Tom Mine ?
Context: The Jericho Diamond Mine is a dormant diamond mine located in Canada's Nunavut territory.  Jericho is Nunavut’s first and only diamond mine.  It is located 420 km northeast of Yellowknife, Northwest Territories and is accessible by air all year and by winter road from Yellowknife.  The project was mined from 2006 to 2008, and produced 780000 carat of diamonds from 1200000 t of kimberlite mined from the open pit operation.  Over $200 million was invested in the development of the Jericho operations including the construction of a 2000 t per day diamond recovery plant, maintenance facility, fuel farm, and offices and accommodation for 225 personnel. The Ruth Mine was a small gold producer about 65 km (40 miles) east of Yellowknife, Northwest Territories.  It operated briefly during 1942 and then again in 1959, extracting only 550 troy ounces (17 kg) of gold thus far.  The old mine is today (2012) significant as one of the last intact abandoned mining properties from the 1940s period in the Northwest Territories, although the site was scheduled to be remediated by the federal government. The Ptarmigan and Tom Mine were gold producers located in the Northwest Territories, Canada at Yellowknife.  The property was staked by prospectors in 1936 and acquired by Cominco in 1938.  The mine first produced between 1941 and 1942 but closed due to wartime restrictions.  The old property was demolished in 1969–1970.  A new company, Treminco Resources Limited, reopened the workings in 1985 and production from the Tom ( ) portal began in 1986 with material being trucked to Giant Mine.  The old Ptarmigan ( ) mine shaft was dewatered and production began in 1987.  A new mill was built at the property and was operational in July 1989.  Low gold prices forced the company to close the mines in 1997.  Total gold production has been approximately 120,000 troy ounces (3700 kg). The Colomac Mine was a privately owned and operated open pit gold mine located 220 km northwest of Yellowknife in the Northwest Territories in Canada .  The Colomac mine operated between 1990–1992, and 1994–1997.  It was operated by Neptune Resources Limited that had little success in making a profit during its operation.  In 1994, the mine had reopened under Royal Oak Mines Inc.  Both Neptune Resources and Royal Oak Mines where both owned and operated by Peggy Witte.  Due to low gold prices and high cost of mining, Royal Oak Mines was forced into bankruptcy.  The Federal Government of Canada became owners of the mine, along with the related environmental issues.  A major cleanup effort is under way to prevent the mine from polluting the environment, but this might be too late at this stage.  This mine is now owned and controlled by the Indigenous and Northern Affairs department of the Federal government, while Public Works and Government services is the current contracting authority. The Giant Mine was a gold mine located on the Ingraham Trail, 5 km north of Yellowknife, Northwest Territories.  Giant Mine is within the Kam Group, which is part of the Yellowknife greenstone belt.  Gold was discovered on the property and mineral claims staked in 1935 by Johnny Baker, but the true extent of the gold deposits were not known until 1944 when a massive gold-bearing shear zone was uncovered beneath the drift-filled Baker Creek Valley. The Bank of Toronto is a historic cabin located in Old Town, Yellowknife, Northwest Territories, Canada.  The log cabin was constructed in 1939 by John Stakson an expert log builder in the commercial district of the Yellowknife community for use as a residence.  In October 1944, the Bank of Toronto purchased the cabin and opened a new bank for the community, joining the Bank of Commerce (Yellowknife's first bank in 1938).  The bank arrived in Yellowknife in response to new financial activity brought about by the intersection of gold in shear zones at Giant Mine and the resulting staking spree around the region.  As the gold rush ended, the volume of business was insufficient to keep the bank profitable, and the Bank of Toronto closed this branch in August 1951. The Con Mine (1938-2003) was the first gold mine developed in the Northwest Territories, Canada, just south of Yellowknife.  The property was staked by Consolidated Mining and Smelting Company of Canada (Cominco) in September 1935 in response to the discovery of visible gold nearby; the name "Con" is an abbreviation of "Consolidated".  The advent of winter prevented any prospecting from being conducted, but work in the summer of 1936 led to the discovery of numerous gold veins.  The Con Mine entered production in 1938 and ceased operations in 2003.  It has produced over 5000000 ozt of gold from 12,195,585 tons of ore processed.  The mine was over 6000 ft deep. The Burwash Mine was a small gold property discovered in the fall of 1934 by Johnny Baker and Hugh Muir at Yellowknife Bay, Northwest Territories.  The town of Yellowknife did not exist yet at that point, but the discovery of gold at Burwash was the catalyst that brought more gold prospectors into the region in 1935 and 1936.  A short shaft was sunk in 1935-1936 at Burwash, and in the summer of 1935 a 16-ton bulk sample of ore was shipped to Trail, British Columbia for processing, yielding 200 troy ounces (6 kg) of gold.  The mine did not become a substantial producer and it is believed the gold vein was mined out. The Salmita Mine was a gold producer in the Northwest Territories, Canada during 1983 to 1987.  The deposit was first discovered in 1945 and underground exploration was carried out in 1951-1952.  It was reactivated for exploration by Giant Yellowknife Mines Limited in 1975 and entered production in 1983.  They used the old camp and milling plant of the abandoned Tundra Mine, located a few kilometres to the south.  The mine produced 179,906 troy ounces (5596 kg) of gold from the milling of 238,177 tons of ore. The 2012 NWT/Yukon Scotties Tournament of Hearts, the women's provincial curling championship for the Yukon and Northwest Territories, were originally scheduled for January 26 to 29 at the Yellowknife Curling Club in Yellowknife, Northwest Territories.  However, due to no entries into the Yukon Ladies Championship, the Northwest Territories Ladies Championship, held January 13–15, at the Inuvik Curling Club, in Inuvik, was used to determine a representative for the Yukon/Northwest Territories.  Kerry Galusha and her team from Yellowknife won the tiebreaker final, and the right to represent Yukon/Northwest Territories, at the 2012 Scotties Tournament of Hearts in Red Deer, Alberta, where Galusha would finish round robin with a 4-7 record.
Answer: Ptarmigan and Tom Mine