Key Lake mine

From Wikipedia, the free encyclopedia - View original article

Key Lake mine
Location
Key Lake mine is located in Saskatchewan
Key Lake mine
Key Lake mine
Location in Saskatchewan
LocationAthabasca Basin
ProvinceSaskatchewan
CountryCanada
Coordinates57°12′24″N 105°39′33″W / 57.20667°N 105.65917°W / 57.20667; -105.65917Coordinates: 57°12′24″N 105°39′33″W / 57.20667°N 105.65917°W / 57.20667; -105.65917
Production
ProductsUranium
Owner
CompanyCameco(83%) and AREVA(17%)
 
  (Redirected from Key Lake)
Jump to: navigation, search
Key Lake mine
Location
Key Lake mine is located in Saskatchewan
Key Lake mine
Key Lake mine
Location in Saskatchewan
LocationAthabasca Basin
ProvinceSaskatchewan
CountryCanada
Coordinates57°12′24″N 105°39′33″W / 57.20667°N 105.65917°W / 57.20667; -105.65917Coordinates: 57°12′24″N 105°39′33″W / 57.20667°N 105.65917°W / 57.20667; -105.65917
Production
ProductsUranium
Owner
CompanyCameco(83%) and AREVA(17%)

The Key Lake mine is a former uranium mine in Saskatchewan, Canada, and the site of the largest uranium mill in the world. It was initially developed to open-pit mine two nearby uranium ore deposits: the Gaertner deposit and the Deilmann deposit. Mining of this ore ceased in the late 1990s; the Key Lake mill now processes uranium ore from the McArthur River mine and from existing stockpiles on site. High-grade ore from McArthur river is blended with lower grade local rock before being passed through the mill. The mill has an annual production capacity of 18 million pounds of U3O8. In addition, ammonium sulfate fertilizer is produced as a byproduct from used reagents. The pits of the mined out local deposits are being used as mill tailings management facilities.

The Key Lake deposits jointly remain one of the higher grade uranium deposits ever discovered, at an average grade of over 2% U3O8. Key Lake is the third largest uranium deposit in the Athabasca Basin and is surpassed only by McArthur River and Cigar Lake.

Much of the exploration and development work was carried out by Uranerz Exploration and Mining, a company linked with German utility operators.[citation needed] The ore body was discovered by tracing radioactive boulders in the overburden back to their source.[citation needed]

Key Lake is located 570 kilometres north of Saskatoon, Saskatchewan by air on the southern rim of the uranium-rich Athabasca Basin. The nearest village by road is Pinehouse, 220 kilometres south of Key Lake.

History[edit]

Key Lake Deposits
NameDiscoveredCommencedDepletedComments
Gaertner197519831987
Dielmann197619891997Ore stockpiled to mix with and dilute high-grade McArthur River ore. The open pit is used as a tailings management facility for McArthur River ore.

Production[edit]

Together, between 1983 and 1997 the two Key lake deposits produced 4.08 million tonnes of ore at an average grade of 2.32% U3O8 (for a total of 208 million pounds U3O8 produced).[citation needed] The mill currently produces 18.7 million pounds of yellowcake per year.

Ownership[edit]

The Key Lake operation is owned by Cameco Corporation (83%) and AREVA Resources Canada Inc (17%), formerly COGEMA Resources Inc. Cameco is the operator.

Climate[edit]

Climate data for Key Lake
MonthJanFebMarAprMayJunJulAugSepOctNovDecYear
Record high °C (°F)10
(50)
9
(48)
12.5
(54.5)
28.5
(83.3)
32.5
(90.5)
34.5
(94.1)
33.5
(92.3)
36
(97)
28.5
(83.3)
24.5
(76.1)
12.2
(54)
5
(41)
36
(97)
Average high °C (°F)−17.7
(0.1)
−12.5
(9.5)
−4.5
(23.9)
4.4
(39.9)
13
(55)
19.3
(66.7)
21.8
(71.2)
19.9
(67.8)
12.3
(54.1)
3.9
(39)
−7.6
(18.3)
−15.5
(4.1)
3.1
(37.6)
Daily mean °C (°F)−23.2
(−9.8)
−18.4
(−1.1)
−11.4
(11.5)
−1.7
(28.9)
6.9
(44.4)
13.4
(56.1)
16.1
(61)
14.5
(58.1)
7.9
(46.2)
0.3
(32.5)
−11.7
(10.9)
−20.4
(−4.7)
−2.3
(27.9)
Average low °C (°F)−28.6
(−19.5)
−24.3
(−11.7)
−18.2
(−0.8)
−7.8
(18)
0.7
(33.3)
7.4
(45.3)
10.4
(50.7)
9
(48)
3.4
(38.1)
−3.3
(26.1)
−15.6
(3.9)
−25.3
(−13.5)
−7.7
(18.1)
Record low °C (°F)−51.5
(−60.7)
−48
(−54)
−50.5
(−58.9)
−40
(−40)
−15.5
(4.1)
−5
(23)
0
(32)
−2
(28)
−8.5
(16.7)
−28
(−18)
−39.5
(−39.1)
−48
(−54)
−51.5
(−60.7)
Precipitation mm (inches)19.1
(0.752)
16.7
(0.657)
20.6
(0.811)
26.3
(1.035)
38.3
(1.508)
63.2
(2.488)
85.2
(3.354)
68.9
(2.713)
56.7
(2.232)
38.4
(1.512)
26.7
(1.051)
21.1
(0.831)
481.1
(18.941)
Source: Environment Canada[1]

See also[edit]

References[edit]

External links[edit]