Question: Outpost Island Mine and Discovery Mine, are located where?
Context: Archaeal Richmond Mine acidophilic nanoorganisms (ARMAN) were first discovered in an extremely acidic mine located in northern California (Richmond Mine at Iron Mountain) by Brett Baker in Jill Banfield's laboratory at the University of California Berkeley.  These novel groups of archaea named ARMAN-1, ARMAN-2 ("Candidatus" Micrarchaeum acidiphilum ARMAN-2 ), and ARMAN-3 were missed by previous PCR-based surveys of the mine community because the ARMANs have several mismatches with commonly used PCR primers for 16S rRNA genes.  Baker "et al." detected them in a later study using shotgun sequencing of the community.  The three groups were originally thought to represent three unique lineages deeply branched within the Euryarchaeota, a subgroup of the Archaea.  However, this has been revised, based on more complete archaeal genomic tree, that they belong to a super phylum named DPANN.  The ARMAN groups now comprise deeply divergent phyla named Micrarchaeota and Parvarchaeota.  Their 16S rRNA genes differ by as much as 17% between the three groups.  Prior to their discovery all of the Archaea shown to be associated with Iron Mountain belonged to the order Thermoplasmatales (e.g., "Ferroplasma acidarmanus"). The Grib mine is one of the largest diamond mines in Russia and in the world.  The Grib diamond pipe is named in honor of Vladimir Grib, a post-graduate member of the exploration team, led by Andrѐy V. Sinitsyn, who died prior to the mine's discovery.  The mine is located in the north-western part of the country in the Arkhangelsk Oblast.  The mine has estimated reserves of 98.5 million carats of diamonds and an annual production capacity of 3.62 million carats. The Discovery Mine was a gold mine 81 kilometers northeast (approx bearing of 15 degrees) of Yellowknife, Northwest Territories that operated between 1950 and 1969.  Gold was discovered here by Alfred Giauque in 1944.  A complete townsite, on Giauque Lake, was established by the company to house workers and their families.  The mine produced one million troy ounces (31,000 kg) of gold from one million tons of ore.  The abandoned townsite, not accessible by road, was demolished in 2005. The Simberi mine is one of the largest gold mines in Papua New Guinea and in the world.  The mine is located in the north of the country on Simberi Island, New Ireland Province.  The mine, owned by St Barbara Limited, has estimated reserves of 3.3 million oz of gold. The Batu Hijau mine is an open pit copper-gold mine operated by Newmont Mining Corporation's subsidiary company PT Newmont Nusa Tenggara (PT Newmont).  The mine is located 1530 km east of the Indonesian capital Jakarta on Sumbawa, in southern Taliwang Regency, an island in West Nusa Tenggara.  The mine is the result of a ten-year exploration and construction program based on a 1999 discovery of the porphyry copper deposit.  Production began in 2000. The Jackson Mine is an open pit iron mine in Negaunee, Michigan, extracting resources from the Marquette Iron Range.  The first iron mine in the Lake Superior region, Jackson Mine was designated as a Michigan State Historic Site in 1956 and listed on the National Register of Historic Places in 1971.  The Lake Superior Mining Institute said, the mine "is attractive in the iron ore region of Michigan and the entire Lake Superior region, because of the fact it was here that the first discovery of iron ore was made, here the first mining was done, and from its ore the first iron was manufactured."  Multiple other mines soon followed the Jackson's lead, establishing the foundation of the economy of the entire region.  The mine is located northwest of intersection of Business M-28 and Cornish Town Road. The Khewra Salt Mine (or Mayo Salt Mine) is located in Khewra, north of Pind Dadan Khan, an administrative subdivision of Jhelum District, Punjab Region, Pakistan, which rises from the Indo-Gangetic Plain.  It is Pakistan's largest and oldest salt mine and the world's second largest.  It is a major tourist attraction, drawing up to 250,000 visitors a year.  Its history dates back to its discovery by Alexander's troops in 320 BC, but it started trading in the Mughal era.  The main tunnel at ground level was developed by Dr. H. Warth, a mining engineer, in 1872 during British rule.  After independence, the Pakistan Mineral Development Corporation took over the mine, which still remains the largest source of salt in the country, producing more than 350,000 tons per annum of about 99% pure halite.  Estimates of the reserves of salt in the mine vary from 82 million tons to 600 million tons. The Gag Island mine is a large mine in the east of Indonesia in Sulawesi.  Gag Island represents one of the largest nickel reserve in Indonesia having estimated reserves of 240 million tonnes of ore grading 1.35% nickel.  The 240 million tonnes of ore contains 3.24 million tonnes of nickel metal. Polaris zinc mine was an underground zinc mine on Little Cornwallis Island in the Canadian territory of Nunavut (Northwest Territories prior to Nunavut's official separation).  The Polaris mine was located 1120 km north of the Arctic Circle, and 96 km north of the community of Resolute.  The Polaris mine closed in July 2002 following more than twenty years of zinc production. The Outpost Island Mine was a gold and tungsten producer 94 kilometres southeast of Yellowknife, Northwest Territories on an island of Great Slave Lake.  Gold was discovered here in 1935 by prospectors, and some development was undertaken in 1936-1938.  Tungsten ores became valuable during World War II, so the owners (Slave Lake Gold Mines Limited) investigated the tungsten possibilities of the mine.  It produced small amounts of gold, copper, and tungsten during 1941-1942, and then again in 1951-1952 during the Korean War.  It was a small deposit and was not considered economic because of unpredictable tungsten market prices in the 1950s.
Answer: Yellowknife, Northwest Territories