Question: What does the Golden Giant Mine and the  Lost McLeod Mine have in common?

full_context: Document 1: 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.
Document 2: List of lost mines: Lost mines are a popular form of lost treasure legend. The mine involved is usually of a high-value commodity such as gold, silver or diamonds. Often there is a map (sometimes called a "waybill") purportedly showing the location of the mine. Common reasons given for the mines being lost include:
Document 3: Copperfields Mine: Copperfields Mine, originally known as Temagami Mine, is an abandoned copper and silver mine on Temagami Island in Lake Temagami, Ontario, Canada. The mine opened in 1955 and comprises both underground and surface workings within a sulfide ore body. Situated in Phyllis Township, the mine produced 34,000,000 dollars Canadian with 80 million pounds of copper, 230,028 ounces of silver and 13,271 ounces of gold. It was considered to be the largest deposit of nearly pure chalcopyrite ever discovered in Canada. A mill was not initially needed because the ore was 28% copper. The mine closed in 1972 and is now flooded by water. Ruins of the Copperfields mill are present as foundations. It is possible to find mineral specimens in the spoil heaps of the old mine, such as chalcopyrite, pyrite, bornite, malachite, dolomite, hessite, merenskyite, millerite, palladium, quartz and others. The Lake Temagami Access Road was created to ship ore from the mine site.
Document 4: Giant Mine (film): Giant Mine is a Canadian television film, which dramatizes the events of the 1992 Giant Mine labour dispute and the subsequent bomb explosion which killed nine replacement workers. The film, written by John Hunter and Martin O'Malley and directed by Penelope Buitenhuis, aired on CBC Television in 1996.
Document 5: Temagami-Lorrain Mine: Temagami-Lorrain Mine is an abandoned surface and underground mine in Northeastern Ontario, Canada. It is located about 10 km northeast of the town of Temagami near Sauvé Lake in central Cassels Township. It is named after the Temagami-Lorrain Mining Company, which carried out work on the property in the early 1900s.
Document 6: Lost Lemon Mine: The Lost Lemon Mine is a legendary lost mine said to be located in the Canadian Province of Alberta. The story has been retold in countless books with the authoritative version being "The Lost Lemon Mine" by Tom Primrose.The story first appeared in the 1946 edition of the "Alberta Folklore Quarterly" and later in magazines such as "Canada West". The Lost Lemon Mine has also been featured in television documentary series "Northern Mysteries", and worked into the plot of "The Final Sacrifice". Countless people have searched for the mine. A number of searchers have never returned.
Document 7: Lost McLeod Mine: Lost McLeod Mine is a legend of a lost mine in the Northwest Territories of Canada. The story has been featured in many books and magazines. The events in the legend have led to geographic locations in the Northwest Territories being named Headless Valley and Headless Creek located in Nahanni National Park Reserve. A creek called Sheep Creek was renamed McCleod Creek in honour of the Mcleod Brothers. 20 people have lost their lives searching for The Lost McLeod Mine.
Document 8: N.W.T. Mining Heritage Society: The N.W.T. Mining Heritage Society, in the Northwest Territories, Canada, was first formed in early 2000 as the Giant Mine Heritage Group to rescue items from the Giant Mine site after its owner, Royal Oak Mines Incorporated, went bankrupt.
Document 9: Lost Blue Bucket Mine: The Lost Blue Bucket Mine is a lost mine reputed to be located along the Meek Wagon Train trail between the present day cities of Vale and The Dalles in Oregon, United States. Its existence traces back to 1845, several years before the start of the California Gold Rush.
Document 10: Jolly Jack's Lost Mine: Jolly Jack's Lost Mine is a legend about a hidden placer mine supposed to be located in the Boundary Country of British Columbia. The mine has been written about by local historians and various magazines. Many have searched for the lost placer mine of Jolly Jack. It is a local legend in the Boundary Country.
Document 11: Golden Giant Mine: The Golden Giant Mine is a closed underground gold mine in the Hemlo mining camp in Canada, located north of Lake Superior, midway between Sault Ste. Marie and Thunder Bay, Ontario near the town of Manitouwadge.
Document 12: McIntyre Mines: The McIntyre mine is an abandoned underground gold mine in Schumacher, Ontario, Canada, which has earned a place in Canadian mining history as one of the nation's most important mines. Its iconic headframe, located near downtown Timmins, has come to represent the entire Porcupine Gold Rush. The McIntyre also yielded a considerable amount of copper over its life.
Document 13: Northland Pyrite Mine: The Northland Pyrite Mine, also known as James Lake Mine, Rib Lake Mine, Harris Mine or simply Northland Mine, is an abandoned underground mine in Northeastern Ontario, Canada, located on the southwestern shore of James Lake in Best Township of Temagami. It was operated by the Northland Mining Company during the early 1900s with the construction of a 91 m shaft and many open-cuts north of the shaft. Minerals present at the mine include chalcopyrite, pyrite and pyrrhotite, deposited in Precambrian volcanic rock of the Canadian Shield.
Document 14: Pitt Lake's lost gold mine: Pitt Lake's Lost Gold Mine is a legendary lost mine said to be near Pitt Lake, British Columbia, Canada, the supposed wealth of which has held the imagination of people worldwide for more than a century. Ever since the years of the Fraser Canyon Gold Rush prospectors and adventurers have been looking for the mine and gold-rush rumors have evolved into legends repeated and enriched over time. The mysterious riches are known as Slumach’s Lost Mine, or Lost Creek Mine.
Document 15: Giant Mine: 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.
ground_truth: Canada