# Copperfields Mine

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{{Infobox Mine
| name = Copperfields Mine
| pushpin_map = Ontario
| pushpin_label = Copperfields Mine
| pushpin_map_caption = Location in Ontario
|coordinates      = {{coord|46|57|44.7012|N|80|02|16.0259|W|region:CA-ON|format=dms|display=inline,title}}
| place            = [Temagami](/source/Temagami)
| subdivision_type = [Province](/source/Provinces_and_territories_of_Canada)
| state/province   = [Ontario](/source/Ontario)
| country          = [Canada](/source/Canada)
| products         = [copper](/source/copper), [silver](/source/silver), [gold](/source/gold)
| amount           =  80 million pounds of [copper](/source/copper), 230,028 ounces of [silver](/source/silver) and 13,271 ounces of [gold](/source/gold)<ref name="GGSN"/>
| opening year     = 1955
| closing year     = 1972
}}
'''Copperfields Mine''', originally known as '''Temagami Mine''', is an abandoned copper and silver mine on [Temagami Island](/source/Temagami_Island) in [Lake Temagami](/source/Lake_Temagami), Ontario, Canada. The mine opened in 1955 and comprises both underground and surface workings within a sulfide [ore](/source/ore) body. Situated in [Phyllis Township](/source/Phyllis_Township), the mine produced 34,000,000 dollars Canadian with 80 million pounds of [copper](/source/copper), 230,028 ounces of [silver](/source/silver) and 13,271 ounces of [gold](/source/gold).<ref name="GGSN">{{cite journal|title=Ground Geophysical Surveys: Niemetz Property |id={{Afri|31M04SW2038}} }}</ref> It was considered to be the largest deposit of nearly pure [chalcopyrite](/source/chalcopyrite) ever discovered in Canada.<ref>{{cite book|last1=Barnes|first1=Michael|year=2008|title=More Than Free Gold|publisher=General Store Publishing House|location=[Renfrew, Ontario](/source/Renfrew%2C_Ontario)|isbn=978-1-897113-90-5|page=31|url=https://books.google.com/books?id=R54EKg_TcKwC&q=temagami&pg=PA31|access-date=2015-08-02}}</ref>  A mill was not initially needed because the ore was 28% copper.<ref>{{cite web |title=Norman B. Keevil: A lifetime of achievement at Teck |last1=Vaccaro |first1=Anthony |date=2015-05-19 |publisher=[The Northern Miner](/source/The_Northern_Miner_(Canada)) |url=http://www.northernminer.com/news/norman-b-keevil-a-lifetime-of-achievement-at-teck/1003632682/ | access-date=2015-08-02}}</ref> The mine closed in 1972 and is now [flood](/source/flood)ed by [water](/source/water). Ruins of the Copperfields mill are present as foundations. It is possible to find [mineral](/source/mineral) specimens in the spoil heaps of the old mine, such as [chalcopyrite](/source/chalcopyrite), [pyrite](/source/pyrite), [bornite](/source/bornite), [malachite](/source/malachite), [dolomite](/source/dolomite_(mineral)), [hessite](/source/hessite), [merenskyite](/source/merenskyite), [millerite](/source/millerite), [palladium](/source/palladium), [quartz](/source/quartz) and others. The [Lake Temagami Access Road](/source/Lake_Temagami_Access_Road) was created to ship ore from the mine site.

Copper-nickel mineralization at the mine is associated with semi-massive to disseminated pyrite at the lower contact between altered [gabbro](/source/gabbro) and [rhyolite](/source/rhyolite) of the [Temagami Greenstone Belt](/source/Temagami_Greenstone_Belt). The gabbro is steeply [dipping](/source/Strike_and_dip), approximately 250 m thick and has a strike extent of at least 5&nbsp;km. The intensity of mineralization varies greatly but is present over most of the defined strike length of the gabbro. Copper is associated with chalcopyrite. Nickel is associated with millerite, [gersdorffite](/source/gersdorffite), [linnaeite](/source/linnaeite) and cobalt-nickel sulfarsenides.

Copperfields Mine is the discovery site of a bright white [mineral](/source/mineral) called [temagamite](/source/temagamite).<ref>[http://www.mindat.org/min-3908.html Temagamite: Temagamite mineral information and data.] Retrieved on 2007-08-30</ref> It was discovered in 1973.

==See also==
*[List of mines in Temagami](/source/List_of_mines_in_Temagami)
*[Volcanism of Canada](/source/Volcanism_of_Canada)
*[Volcanism of Eastern Canada](/source/Volcanism_of_Eastern_Canada)

==References==
{{Reflist}}

==External links==
*{{cite amis|03768|Temagami|2011-07-19}}

Category:Copper mines in Ontario
Category:Geological type localities
Category:Gold mines in Ontario
Category:Mines in Temagami
Category:Precambrian volcanism
Category:Open-pit mines
Category:Silver mines in Canada
Category:Surface mines in Canada
Category:Underground mines in Canada

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