# Hoidas Lake

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Lake in Saskatchewan, Canada

Hoidas Lake Hoidas Lake Location in Saskatchewan Show map of Saskatchewan Hoidas Lake Hoidas Lake (Canada) Show map of Canada Location Northern Saskatchewan Administration District Coordinates 59°55′41″N 107°49′12″W / 59.928°N 107.820°W / 59.928; -107.820 Part of Mackenzie River drainage basin Basin countries Canada Max. length 3.7 km (2.3 mi) Surface area 180.5 ha (446 acres) Shore length1 11 km (6.8 mi) Surface elevation 451 m (1,480 ft) Settlements None 1 Shore length is not a well-defined measure.

**Hoidas Lake** is a small, remote northern lake in the [Canadian province](/source/Provinces_and_territories_of_Canada) of [Saskatchewan](/source/Saskatchewan).[1][2] It is about 7 kilometres (4.3 mi) south of the Saskatchewan–[Northwest Territories](/source/Northwest_Territories) border and 50 kilometres (31 mi) north of [Uranium City](/source/Uranium_City) in the Tazin River watershed.[3] Named in honour of Irvin Frank Hoidas, a [Royal Canadian Air Force](/source/Royal_Canadian_Air_Force) pilot officer killed in action during the [Second World War](/source/Second_World_War) when his [Stirling](/source/Short_Stirling) W-7520 crashed near the Belgian town of [Sint-Truiden](/source/Sint-Truiden),[4][5] it is the site of Canada's most advanced [rare-earth element](/source/Rare-earth_element) (REE) [mining](/source/Mining) project.[6]

## Setting

Hoidas Lake lies in the [Northern Rae Geological Province](/source/Rae_craton), in the general vicinity of many of Saskatchewan's large [uranium mines](/source/Uranium_mines).

## Mineralogy

The [mineralogy](/source/Mineralogy) of the Hoidas Lake rare-earth deposit differs from most other such deposits in that it is hosted in [veins](/source/Veins) of [apatite](/source/Apatite) and [allanite](/source/Allanite).[7] Hoidas Lake also differs from other deposits in that it contains a significant amount of heavy rare-earth elements, such as [dysprosium](/source/Dysprosium). This abundance of heavy REEs is significant, as there is a growing demand for the heavier rare earths in high-tech manufacturing (such as the use of dysprosium in the manufacturing of [hybrid car](/source/Hybrid_car) components).[8][9] Mineralization is presumably [hydrothermal](/source/Hydrothermal), from an alkali or [carbonatitic](/source/Carbonatite) source at depth.[10]

The main prospective zone is composed of two dominant rock types: a variably deformed [monzogranite](/source/Monzogranite) and a [granodioritic](/source/Granodiorite) to [tonalitic](/source/Tonalite) [gneiss](/source/Gneiss). Both are [Paleoproterozoic](/source/Paleoproterozoic) to [Archean](/source/Archean) in age.[11]

## Resource scale

Ongoing work at Hoidas Lake has delineated a [vein](/source/Vein_(geology)) system (known as the JAK zone), which extends for at least a kilometre along the [strike](/source/Strike_and_dip).[10] The limits of the system have not been established along the strike nor along the dip,[10] and the zone's total extension is therefore unknown. The resource zone averages 75 m in width[12] and is composed of individual veins which, though ranging from one to eleven metres in thickness, average about three metres each.[10] Veins are continuous to 300 m depth and follow an [anastomosing](/source/Anastomosis) (branching) geometry.[10]

Estimates of the resource, given current delineations and assuming a 1.5% total rare-earth cutoff, have established a presence of at least 286,000 tonnes of rare-earth ore, which is enough to supply more than 10% of the North American market for the foreseeable future.

## Ownership

The Hoidas Lake claims are owned by Great Western Minerals Group, based in [Saskatoon](/source/Saskatoon).

## See also

- [List of lakes of Saskatchewan](/source/List_of_lakes_of_Saskatchewan)

- [List of mines in Saskatchewan](/source/List_of_mines_in_Saskatchewan)

## References

1. **[^](#cite_ref-1)** ["Hoidas Lake"](https://toponymes.rncan.gc.ca/search-place-names/unique/HAFOF). *Canadian Geographical Names Database*. Government of Canada. Retrieved 8 July 2025.

1. **[^](#cite_ref-2)** Siemens, Matthew. ["Hoidas Lake"](https://sasklakes.ca/hoidas-lake/). Sask Lakes. Retrieved 16 July 2025.

1. **[^](#cite_ref-3)** ["Tazin River"](https://toponymes.rncan.gc.ca/search-place-names/unique/HAUOQ). *Canadian Geographical Names Database*. Government of Canada. Retrieved 16 July 2025.

1. **[^](#cite_ref-4)** ["Irvin Frank Hoidas"](https://web.archive.org/web/20091127191231/http://www.gwmg.ca/media/photos/hoidas-lake/irvin_hoidas_high_quality.jpg/view). Archived from [the original](http://www.gwmg.ca/media/photos/hoidas-lake/irvin_hoidas_high_quality.jpg/view) on 27 November 2009. Retrieved 30 March 2008.

1. **[^](#cite_ref-5)** ["Heverlee"](http://www.inmemories.com/Cemeteries/heverlee.htm).

1. **[^](#cite_ref-6)** ["Hoidas Lake, Saskatchewan, Canada"](https://www.mindat.org/feature-5975987.html). mindat.org. Retrieved 17 July 2025.

1. **[^](#cite_ref-7)** Salvi S, Williams‐Jones A. 2004. Alkaline granite‐syenite deposits. In Linnen RL, Samson IM, editors. Rare element geochemistry and mineral deposits. St. Catharines (ON): Geological Association of Canada. pp. 315–341

1. **[^](#cite_ref-8)** ["INTERVIEW-Japan urges China to ease rare metals supply"](https://www.reuters.com/article/idUSL08815827). *Reuters*. 8 November 2007. Retrieved 9 May 2023.

1. **[^](#cite_ref-9)** ["The Anchor House, Inc. – Research on Rare Earth Elements"](https://www.theanchorhouse.com/). Retrieved 9 May 2023.

1. ^ [***a***](#cite_ref-library2.usask.ca_10-0) [***b***](#cite_ref-library2.usask.ca_10-1) [***c***](#cite_ref-library2.usask.ca_10-2) [***d***](#cite_ref-library2.usask.ca_10-3) [***e***](#cite_ref-library2.usask.ca_10-4) Halpin, Kimberley Michelle (January 2010). ["The characteristics and origin of the Hoidas Lake REE Deposit"](https://harvest.usask.ca/handle/10388/etd-01292010-141709). Retrieved 2 June 2020.

1. **[^](#cite_ref-11)** Geology of the LeBlanc-Wellington lakes area, eastern Zemlak Domain, Rae Province; in Summary of Investigations 2003, v. 2, Saskatchewan Geological Survey, Sask. Industry and Resources, Misc. Rep. 2003-4.2. Available through: [http://www.er.gov.sk.ca/adx/aspx/adxGetMedia.aspx?DocID=11840,11458,11455,11228,3385,5460,2936,Documents&MediaID=36607&Filename=Ashton03_SOIMAP_West.pdf](http://www.er.gov.sk.ca/adx/aspx/adxGetMedia.aspx?DocID=11840,11458,11455,11228,3385,5460,2936,Documents&MediaID=36607&Filename=Ashton03_SOIMAP_West.pdf)

1. **[^](#cite_ref-12)** Pearson, J., (2006): Great Western Minerals Group Ltd. Assessment Report on the 2005-2006 Work Program, Hoidas Lake Rare Earth Project. Submitted to Saskatchewan Industry and Resources. Cited (at page six) in: [http://library2.usask.ca/theses/available/etd-01292010-141709/unrestricted/Halpin_K.pdf](http://library2.usask.ca/theses/available/etd-01292010-141709/unrestricted/Halpin_K.pdf)

## External links

- [United States Geological Survey report on Rare Earths](https://pubs.usgs.gov/fs/2002/fs087-02/fs087-02.pdf)

v t e List of lakes of Canada (by province or territory) Provinces Alberta British Columbia Manitoba New Brunswick Newfoundland and Labrador Nova Scotia Ontario Prince Edward Island Quebec Saskatchewan Territories Northwest Territories Nunavut Yukon

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Adapted from the Wikipedia article [Hoidas Lake](https://en.wikipedia.org/wiki/Hoidas_Lake) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Hoidas_Lake?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.