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:
Mindat Locality ID:
19909
Long-form identifier:
mindat:1:2:19909:7
GUID (UUID V4):
842914a7-eb18-490d-9b5b-2ad71bf0baf7
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 |
| ⓘ Gold Formula: Au |
| ⓘ Gold var. Electrum Formula: (Au,Ag) |
| ⓘ 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: |
| ⓘ 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: |
| ⓘ Wölsendorfite Formula: Pb7(UO2)14O19(OH)4 · 12H2O |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Gold | 1.AA.05 | Au |
| ⓘ | var. Electrum | 1.AA.05 | (Au,Ag) |
| 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 | |||
| ⓘ | 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 | ⓘ 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 | ⓘ Gold var. Electrum | (Au,Ag) |
| Ag | ⓘ Eucairite | AgCuSe |
| Au | Gold | |
| Au | ⓘ Gold var. Electrum | (Au,Ag) |
| Au | ⓘ 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 | ⓘ Wölsendorfite | Pb7(UO2)14O19(OH)4 · 12H2O |
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
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References
