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Christopher Island, Baker Lake, Kivalliq Region, Nunavut, Canadai
| Regional Level Types | |
|---|---|
| Christopher Island | Island |
| Baker Lake | Lake |
| Kivalliq Region | Region |
| Nunavut | Territory |
| Canada | Country |
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Latitude & Longitude (WGS84):
64° 5' 33'' North , 94° 36' 58'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
A group of three occurrences on the north western tip of Christopher Island. Miller describes the selenides as: umangite, athabascite, berzelianite, clausthalite and eucairite in various proportions with electrum. The secondary phases include boltwoodite, kasolite, wolsendorfite and malachite.
The Miller Bulletin has XRD and microprobe results for the selenide minerals and their distribution in the sub-localities on Christopher Island. The Athabascaite is Cu4.92Fe0.16Se3.32S0.61; the Berzelianite is Cu6.73Fe0.03Se3.35S0.65; the Umangite is Cu5.57Fe0.05Se4.00S0.0. The Se+S is normalized to 4.0 apfu.
The U-Se-Ag-Au mineralization is present in narrow zones of compound fracturing and brecciation. Subvertical veins contain massive, black, metal-bearing concentrations to 1 cm in width.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Athabascaite Formula: Cu5Se4 |
| ⓘ Berzelianite Formula: Cu2-xSe (x ≈ 0.12) |
| ⓘ Boltwoodite Formula: (K,Na)(UO2)(SiO3OH) · 1.5H2O |
| ⓘ Clausthalite Formula: PbSe Habit: massive Colour: grey Fluorescence: none Description: only metallic there with cubic cleavage. |
| ⓘ Eucairite Formula: AgCuSe |
| ⓘ Kasolite Formula: Pb(UO2)(SiO4) · H2O |
| ⓘ Klockmannite ? Formula: CuSe Description: Not identified by Miller. References: |
| ⓘ Malachite Formula: Cu2(CO3)(OH)2 |
| ⓘ Molybdomenite Formula: PbSeO3 Habit: white lath-like grains Colour: white Fluorescence: none Description: Miller noted "Cerussite" on Clausthalite that is probably Molybdomenite. References: |
| ⓘ Native Gold Formula: Au |
| ⓘ Native Gold var. Electrum Formula: (Au,Ag) |
| ⓘ Umangite Formula: Cu3Se2 Habit: grains to 5 mm. Colour: grey with purple tarnish Description: polished section samples show Umangite as separate grains in matrix. References: |
| ⓘ Uraninite Formula: UO2 |
| ⓘ Wölsendorfite Formula: Pb7(UO2)14O19(OH)4 · 12H2O |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold var. Electrum | 1.AA.05 | (Au,Ag) |
| ⓘ | 1.AA.05 | Au | |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Berzelianite | 2.BA.20 | Cu2-xSe (x ≈ 0.12) |
| ⓘ | Athabascaite | 2.BA.25 | Cu5Se4 |
| ⓘ | Umangite | 2.BA.25 | Cu3Se2 |
| ⓘ | Eucairite | 2.BA.50 | AgCuSe |
| ⓘ | Klockmannite ? | 2.CA.05b | CuSe |
| ⓘ | Clausthalite | 2.CD.10 | PbSe |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Uraninite | 4.DL.05 | UO2 |
| ⓘ | Wölsendorfite | 4.GB.30 | Pb7(UO2)14O19(OH)4 · 12H2O |
| ⓘ | Molybdomenite | 4.JF.05 | PbSeO3 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
| Group 9 - Silicates | |||
| ⓘ | Boltwoodite | 9.AK.15 | (K,Na)(UO2)(SiO3OH) · 1.5H2O |
| ⓘ | Kasolite | 9.AK.15 | Pb(UO2)(SiO4) · H2O |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Boltwoodite | (K,Na)(UO2)(SiO3OH) · 1.5H2O |
| H | ⓘ Kasolite | Pb(UO2)(SiO4) · H2O |
| H | ⓘ Malachite | Cu2(CO3)(OH)2 |
| H | ⓘ Wölsendorfite | Pb7(UO2)14O19(OH)4 · 12H2O |
| C | Carbon | |
| C | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | Oxygen | |
| O | ⓘ Boltwoodite | (K,Na)(UO2)(SiO3OH) · 1.5H2O |
| O | ⓘ Kasolite | Pb(UO2)(SiO4) · H2O |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | ⓘ Molybdomenite | PbSeO3 |
| O | ⓘ Uraninite | UO2 |
| O | ⓘ Wölsendorfite | Pb7(UO2)14O19(OH)4 · 12H2O |
| Na | Sodium | |
| Na | ⓘ Boltwoodite | (K,Na)(UO2)(SiO3OH) · 1.5H2O |
| Si | Silicon | |
| Si | ⓘ Boltwoodite | (K,Na)(UO2)(SiO3OH) · 1.5H2O |
| Si | ⓘ Kasolite | Pb(UO2)(SiO4) · H2O |
| K | Potassium | |
| K | ⓘ Boltwoodite | (K,Na)(UO2)(SiO3OH) · 1.5H2O |
| Cu | Copper | |
| Cu | ⓘ Athabascaite | Cu5Se4 |
| Cu | ⓘ Berzelianite | Cu2-xSe (x ≈ 0.12) |
| Cu | ⓘ Eucairite | AgCuSe |
| Cu | ⓘ Klockmannite | CuSe |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
| Cu | ⓘ Umangite | Cu3Se2 |
| Se | Selenium | |
| Se | ⓘ Athabascaite | Cu5Se4 |
| Se | ⓘ Berzelianite | Cu2-xSe (x ≈ 0.12) |
| Se | ⓘ Clausthalite | PbSe |
| Se | ⓘ Eucairite | AgCuSe |
| Se | ⓘ Klockmannite | CuSe |
| Se | ⓘ Molybdomenite | PbSeO3 |
| Se | ⓘ Umangite | Cu3Se2 |
| Ag | Silver | |
| Ag | ⓘ Native Gold var. Electrum | (Au,Ag) |
| Ag | ⓘ Eucairite | AgCuSe |
| Au | Gold | |
| Au | ⓘ Native Gold var. Electrum | (Au,Ag) |
| Au | ⓘ Native Gold | Au |
| Pb | Lead | |
| Pb | ⓘ Clausthalite | PbSe |
| Pb | ⓘ Kasolite | Pb(UO2)(SiO4) · H2O |
| Pb | ⓘ Molybdomenite | PbSeO3 |
| Pb | ⓘ Wölsendorfite | Pb7(UO2)14O19(OH)4 · 12H2O |
| U | Uranium | |
| U | ⓘ Boltwoodite | (K,Na)(UO2)(SiO3OH) · 1.5H2O |
| U | ⓘ Kasolite | Pb(UO2)(SiO4) · H2O |
| U | ⓘ Uraninite | UO2 |
| U | ⓘ Wölsendorfite | Pb7(UO2)14O19(OH)4 · 12H2O |
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Hearne Craton
- Chesterfield BlockOrogenic Belt
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Christopher Island, Baker Lake, Kivalliq Region, Nunavut, Canada