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Rossport veins, Lahontan Township, Thunder Bay District, Ontario, Canadai
| Regional Level Types | |
|---|---|
| Rossport veins | - not defined - |
| Lahontan Township | Township |
| Thunder Bay District | District |
| Ontario | Province |
| Canada | Country |
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Latitude & Longitude (WGS84):
48° 50' 27'' North , 87° 27' 41'' West
Latitude & Longitude (decimal):
Köppen climate type:
The occurrence comprises a number of veins and vein breccias that extend over an exposed width of almost 180 m. The veins range in thickness from <1 cm up to 60 cm and show a fairly consistent orientation between 125 and 160 degrees, parallel to, and sometimes hosted by, steeply dipping joints in pink to grey hornblende + biotite granite. A 1 m wide diabase dike at the western end of the rock cut has a similar orientation.
Vein mineralogy is dominated by white quartz; purple fluorite, pink barite and fine-grained, disseminated pyrite and rare galena are minor constituents. The veins appear to have a mineral zonation with fluorite in the center of more barite rich sections. Several composite barite veins contain sulphide zones. Pyrite is the most abundant sulphide, and massive sections of pyrite up to 10 cm wide are observed. Minor galena is also present in on section of the Lakeshore vein. The barite-fluorite +/- sulphide veins are observed across a 150 m section of Trans Canada Hwy. 17. One 3 m wide composite vein strikes 144 degrees and dips 84 degrees southwest. A barite rich section of this vein up to 70 cm wide, strikes 170 degrees and dips 70 degrees west. Grab samples of vein material collected by OGS staff in 1992 returned assay values up to 0.002 ounce Au/ton, trace Ag, 86 ppm Zn, 65 ppm Cu and <10 ppm Pb.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Baryte Formula: BaSO4 References: |
| ⓘ Fluorite Formula: CaF2 References: |
| ⓘ Galena Formula: PbS References: |
| ⓘ Pyrite Formula: FeS2 References: |
| ⓘ Quartz Formula: SiO2 References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 3 - Halides | |||
| ⓘ | Fluorite | 3.AB.25 | CaF2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Baryte | 7.AD.35 | BaSO4 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Baryte | BaSO4 |
| O | ⓘ Quartz | SiO2 |
| F | Fluorine | |
| F | ⓘ Fluorite | CaF2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Baryte | BaSO4 |
| S | ⓘ Galena | PbS |
| S | ⓘ Pyrite | FeS2 |
| Ca | Calcium | |
| Ca | ⓘ Fluorite | CaF2 |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
| Ba | Barium | |
| Ba | ⓘ Baryte | BaSO4 |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Databases
| Ontario Canada Geological SurveyMinfile: | MDI42D14SW00035 |
|---|
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Rossport veins, Lahontan Township, Thunder Bay District, Ontario, Canada