Needlepoint Mountain, McDame area, Liard Mining Division, British Columbia, Canadai
| Regional Level Types | |
|---|---|
| Needlepoint Mountain | Mountain |
| McDame area | Area |
| Liard Mining Division | Division |
| British Columbia | Province |
| Canada | Country |
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Latitude & Longitude (WGS84):
59° 8' 20'' North , 129° 46' 19'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
On the west side of Needlepoint Mountain (1969 m), Lower Cambrian Atan Group impure limestone is altered to black magnetite-rich skarn in a zone about 90 metres long adjacent to granitic rocks of the Cassiar Stock.
The skarn is partly banded, with magnetite, chlorite, garnet, diopside, and irregular patches of quartz and fluorite. Danalite, a beryllium-iron silicate of the helvite group, occurs as small grains, clusters, and stringers up to 2 centimetres long. It is accompanied by a few small grains of native bismuth. Overall beryllium content of the occurrence is considerably less than one per cent (McDougall, 1954). Up to 0.038 per cent tin is reported from spectroscopic analysis. Mineralization also includes sphalerite and pyrrhotite.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ 'Chlorite Group' |
| ⓘ Danalite Formula: Be3Fe2+4(SiO4)3S Habit: anhedral grains Colour: orange brown to red brown Description: as translucent cinnamon to reddish-brown anhedral
grains up to 3 mm. in size |
| ⓘ Diopside Formula: CaMgSi2O6 |
| ⓘ Fluorite Formula: CaF2 |
| ⓘ Magnetite Formula: Fe2+Fe3+2O4 |
| ⓘ Native Bismuth Formula: Bi Description: As sparse small grains |
| ⓘ Pyrrhotite Formula: Fe1-xS |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Sphalerite Formula: ZnS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Bismuth | 1.CA.05 | Bi |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Pyrrhotite | 2.CC.10 | Fe1-xS |
| Group 3 - Halides | |||
| ⓘ | Fluorite | 3.AB.25 | CaF2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 9 - Silicates | |||
| ⓘ | Diopside | 9.DA.15 | CaMgSi2O6 |
| ⓘ | Danalite | 9.FB.10 | Be3Fe2+4(SiO4)3S |
| Unclassified | |||
| ⓘ | 'Chlorite Group' | - | |
List of minerals for each chemical element
| Be | Beryllium | |
|---|---|---|
| Be | ⓘ Danalite | Be3Fe42+(SiO4)3S |
| O | Oxygen | |
| O | ⓘ Diopside | CaMgSi2O6 |
| O | ⓘ Danalite | Be3Fe42+(SiO4)3S |
| O | ⓘ Magnetite | Fe2+Fe23+O4 |
| O | ⓘ Quartz | SiO2 |
| F | Fluorine | |
| F | ⓘ Fluorite | CaF2 |
| Mg | Magnesium | |
| Mg | ⓘ Diopside | CaMgSi2O6 |
| Si | Silicon | |
| Si | ⓘ Diopside | CaMgSi2O6 |
| Si | ⓘ Danalite | Be3Fe42+(SiO4)3S |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Danalite | Be3Fe42+(SiO4)3S |
| S | ⓘ Pyrrhotite | Fe1-xS |
| S | ⓘ Sphalerite | ZnS |
| Ca | Calcium | |
| Ca | ⓘ Diopside | CaMgSi2O6 |
| Ca | ⓘ Fluorite | CaF2 |
| Fe | Iron | |
| Fe | ⓘ Danalite | Be3Fe42+(SiO4)3S |
| Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
| Fe | ⓘ Pyrrhotite | Fe1-xS |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
| Bi | Bismuth | |
| Bi | ⓘ Native Bismuth | Bi |
Other Regions, Features and Areas containing this locality
Canada
- Interior MountainsMountain Range
North AmericaContinent
North America PlateTectonic Plate
- Cassiar TerranePassive Margin
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