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

Context articles: Lost Lemon Mine
Lost McLeod Mine
Golden Giant Mine
Giant Mine (film)
N.W.T. Mining Heritage Society
Pitt Lake's lost gold mine
Green Giant mine
Ptarmigan and Tom Mine
Giant Mine
Three Springs 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.
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.
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.
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.
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.
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.
The Green Giant mine is one of the largest vanadium mines in Madagascar.
 The mine is located in Atsimo-Atsinanana.
 The mine has reserves amounting to 59.2 million tonnes of ore grading 0.68% vanadium.
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 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.
Three Springs Mine is a talc mine located outside of Three Springs, Western Australia.
 Owned and operated by the Luzenac Group, a French-based subsidiary of the mining giant Rio Tinto Group, the mine is the oldest and most productive talc mine in the southern hemisphere, and the second-most productive talc mine in the world, with recent annual production of 240,000 tonnes. Rio Tinto acquired the mine in 2001 from the Western Mining Corporation for US$ 27.8 million.