Giant Mine
Location | |
---|---|
Territory | Northwest Territories |
Country | Canada |
Coordinates | 62°29′59″N 114°21′31″W / 62.49972°N 114.35861°W |
History | |
Discovered | 1935 |
Opened | 1948 |
Closed | 2004 |
Owner | |
Company | Miramar Mining Corporation |
Year of acquisition | 1999 |
The Giant Mine was a gold mine located on the Ingraham Trail, 5 km (3.1 mi) north of Yellowknife, Northwest Territories. Giant Mine was within the Kam Group, a 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 was not known until 1944, when a massive gold-bearing shear zone was uncovered beneath the drift-filled Baker Creek Valley.
History
The discovery led to a massive post-war staking boom in Yellowknife. Giant Mine entered production in 1948 and ceased operations in 2004. It produced over 7,000,000
According to an article published in The Star in 2006, there were 15 sealed underground storage chambers 250 feet below ground containing a total of 237,000 tonnes (233,000 long tons; 261,000 short tons) of deadly arsenic trioxide dust, containing up to 60% organic and inorganic arsenic. The dust was a byproduct of extracting gold from the mineral and was collected and stored in sealed underground chambers from 1951 to 1999. Prior to legislated collection and underground storage in 1951 arsenic was released directly into the atmosphere during the roasting process.[3][4] Arsenic trioxide readily dissolves in water; in 2006 underground flooding around Giant Mine's Mill Pond's underground chamber which contained 16,946 tonnes (16,678 long tons; 18,680 short tons) of arsenic trioxide dust threatened to migrate out of the chamber if it was flooded and dump large amounts of arsenic into Yellowknife Bay.[3]
Bombing
On September 18, 1992, at the height of a
Contamination
Mining operations over five decades have created a massive environmental liability, a problem which the mine's previous owners left to the
Remediation
The taxpayer-funded (c. $900m to approximately one billion dollars) remediation plan to permanently freeze the underground arsenic trioxide dust chambers was approved by the Canadian federal government in August 2014.[10][9] According to the federal civil servant in charge of the clean-up, Jane Amphlett, using technology like that used in ice-hockey rinks, coolants will permanently freeze the storage chambers containing the arsenic trioxide dust to keep groundwater seepage out in what is called the "Frozen Block Method."[10][9][4]
A Yellowknife community museum is envisioned for part of the former Giant Mine townsite.
In winter 2020 the Yellowknives Dene First Nation (YKDFN) demonstrated outside the site demanding a federal apology, compensation, and a role in the contracts for remediation. They launched their own website which details the story from their point of view.[11]
Film
The events and aftermath of the
See also
References
- ^ Silke, Ryan. 2009. "The Operational History of Mines in the Northwest Territories, Canada" Self Published, November 2009.
- ^ Silke, Ryan. 2012. "High Grade Tales: Stories from mining camps of the Northwest Territories" Self Published, January 2012.
- ^ a b c d Bryant, Mike W. (10 July 2006), "Disaster brewing at Giant mine site", News/North, Yellowknife: Northern News Services, p. 1, archived from the original on 8 August 2017, retrieved 2 October 2014
- ^ a b c d e Canada's Giant Mine: Giant headache, Yellowknife, NWT: The Economist, 27 September 2014
- ^ "Court overturns award to Giant Mine widows", The Star, Yellowknife, Northwest Territories, 27 May 2008, retrieved 2 October 2014
- ^ Jamieson, H.E.; Maitland, K.M.; Oliver, J.T.; Palmer, M.J. (2017). Regional distribution of arsenic in near-surface soils in the Yellowknife area (PDF). Yellowknife: Northwest Territories Geological Survey.
- ^ Palmer, M.J.; Galloway, J.M.; Jamieson, H.E.; Patterson, R.T.; Falck, H.; Kokelj, S.V. (2016). The concentration of arsenic in lake waters of the Yellowknife area (PDF). Yellowknife: Northwest Territories Geological Survey.
- ^ "Technical Advisors", Aboriginal Affairs and Northern Development Canada, 24 July 2013, archived from the original on 18 August 2016, retrieved 2 October 2014
- ^ a b c "Giant Mine Remediation Plan". Aboriginal Affairs and Northern Development Canada. Retrieved 2 October 2014.
- ^ a b c "Arsenic Trioxide and the Frozen Block Method", Aboriginal Affairs and Northern Development Canada, 24 July 2013, archived from the original on 6 October 2014, retrieved 2 October 2014
- ^ "Yellowknives Dene demand federal compensation, economic benefits from Giant Mine | CBC News". CBC. Retrieved 2020-12-04.
- ^ Garbutt, Nicole (4 December 2013), Artist in residence leaves city after almost three-month stint: New local film to be produced from experience, SOMBA K'E/Yellowknife, Northwest Territories: Northern News Services, archived from the original on 17 May 2017, retrieved 2 October 2014
External links
- "Giant Mine 10 Years Later" Archived 2017-09-24 at the Wayback Machine. Maclean's Magazine, Jonathon Gatehouse, 03/17/2003 via The Canadian Encyclopedia
- "Giant Mine Remediation Project". Retrieved 2014-02-03.
- Giant Yellowknife Mines Ltd. fonds. Northwest Territories Archives