Question: What was mined in both Outpost Island Mine and Discovery Mine?

Context paragraphs:
Gag Island mine: 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.

Kivimaa mine: Kivimaa mine was gold and copper mine active during the years 1969-1970 in Tervola at Sivakkajoki.  During this time 18 587 tonnes of ore were extracted which contained 2.0 grams of gold per tonne.  The concentration of copper in the ore was 1,20%.  Outokumpu Ltd. , which owned the mine, mined the quartz-carbonate veins with highest concentration of gold and copper.  The ore from the mine was transported to the mine of Vihanti to be enriched.  The mining ended on the 12th of December 1969.  The buildings at the mine were taken down in the summer of 1974.

Mine reclamation: Mine reclamation is the process of restoring land that has been mined to a natural or economically usable state.  Although the process of mine reclamation occurs once mining is completed, the planning of mine reclamation activities occurs prior to a mine being permitted or started.  Mine reclamation creates useful landscapes that meet a variety of goals ranging from the restoration of productive ecosystems to the creation of industrial and municipal resources.  In the United States, mine reclamation is a regular part of modern mining practices.  Modern mine reclamation minimizes and mitigates the environmental effects of mining.

Mining in Mongolia: Mining is important to the national economy of Mongolia.  Coal, copper, and gold are the principal reserves mined in Mongolia.  Several gold mines are located about 110 km north of Ulaanbaatar, such as Boroo Gold Mine and Gatsuurt Gold Mine.  Khotgor Coal Mine is an open-pit coal mining site about 120 km west of Ulaangom.  Ömnögovi Province in the south of Mongolia is home to large scale mining projects such as the Tavan Tolgoi coal mine and the Oyu Tolgoi copper mine.  Oyu Tolgoi mine is reported to have the potential to boost the national economy by a third but is subject to dispute over how the profits should be shared.  The International Monetary Fund (IMF) has estimated that 71 percent of the income from the mine would go to Mongolia.

Crisson Mine: Crisson Mine was a gold mine in Lumpkin County, Georgia, USA, located just east of Dahlonega.  Like many mines in the area, the property probably started as a placer mine during the Georgia Gold Rush.  Once the placer deposits had been exhausted, an open pit gold mine was established in 1847 and commercial operations continued until the early 1980s.  A small stamp mill was also established here.  Much of the gold used for the gold leaf dome of the Georgia State Capitol was mined at this mine, which was among the most productive mine in the Georgia Gold Belt.  The mine is located just north of the site of the Consolidated Mine, which is itself north of and the Calhoun Mine.

Penhalonga: Penhalonga is mining village in the province of Manicaland, Zimbabwe located 18 km north of Mutare in a valley where the Sambi and Imbeza Rivers meet the Mutare River.  According to the 1982 Population Census, the village had a population of 4,477.  Ancient gold workings have been found in the area.  In 1895 the Penhalonga Mine opened and the village grew around the gold mine.  The name is derived from the Portuguese words "penha" meaning 'rocky mountain' and "longa" meaning "long".  While the old Penhalonga mine closed in 1943, a new mine, the Rezende Mine, opened in 1999.  Bauxite clay, which is also mined in the area, supplies most of Zimbabwe's pottery industry.  The village is the residential and commercial centre for the mine and the surrounding area of forestry, dairy and mixed farming.

Kanichee Mine: The Kanichee Mine, also less commonly known as the Ajax Mine, is an abandoned base metal and precious metal mine, located in the Temagami region of northeastern Ontario, Canada.  It is near the small unincorporated community of Temagami North, accessed by the Kanichee Mine Road from Highway 11.  The Kanichee Mine zone has been explored and mined discontinuously from as early as 1910.  During the 20th century, it operated and closed down at least three times, with the most recent being from 1973 to 1976.  To date, the discontinuous operation of Kanichee Mine has produced 4.2 million pounds of metal.

Discovery Mine: 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.

Jualin Mine: Jualin Mine is a defunct gold mine located within the City and Borough of Juneau, Alaska approximately 44 mi northwest of downtown Juneau, Alaska.  The Jualin gold deposit was discovered by prospector Frank Cook in 1895 and was initially mined by the Jualin Mining Company.  A stamping mill with a daily capacity of 30 st of ore was installed early in the mine's operation.  The mine operated intermittently from 1896 to 1901 and again from 1905 to 1908, when it was closed at a depth of 210 feet due to water infiltration and power shortages.  In 1912, the mine was purchased by a Belgian group, which began investing in better equipment and deeper drilling.  In 1914, the shaft was deepened to 325 feet, and mining took place at the 310-foot level.  A drainage and haulage tunnel was planned to extend 7800 ft south of the mine to allow easy access to the mining levels, but the outbreak of World War I halted this effort when the extension was only 5000 ft long.

Outpost Island Mine: 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.

Supporting paragraphs: Outpost Island Mine Discovery Mine
Answer: gold