Shag Rock Mn Occurrence, Klashwun Point, Graham Island, Haida Gwaii, Skeena Mining Division, British Columbia, Canadai
Regional Level Types | |
---|---|
Shag Rock Mn Occurrence | Occurrence |
Klashwun Point | - not defined - |
Graham Island | Island |
Haida Gwaii | Group of Islands |
Skeena Mining Division | Division |
British Columbia | Province |
Canada | Country |
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Latitude & Longitude (WGS84):
54° 8' 53'' North , 132° 39' 25'' West
Latitude & Longitude (decimal):
Type:
KΓΆppen climate type:
Mindat Locality ID:
214964
Long-form identifier:
mindat:1:2:214964:9
GUID (UUID V4):
2b59959e-57a7-4327-a6f7-5dea3c14e497
The Shag Rock Mn occurrence is located at Klashwun Point, at the north end of Graham Island, Haida Gwaii, just north of Indian Reserve 13, about 38 kilometres west-northwest of the community of Masset, British Columbia.
There is a description of the geological setting and work history for this property on the British Columbia βMinfileβ site, current to 1989. Relevant portions on geology are quoted below:
βThe area is underlain by Tertiary volcanics of the Masset Formation consisting of amygdaloidal basalts, basalt flows and porphyritic andesite sills which strike north to northeast and dip 15 to 20 degrees east. A fault, striking 015 degrees and dipping 80 degrees east, crosscuts the lavas. East of the fault, the lavas are underlain by 23 metres of dark-grey shale and buff-coloured, calcareous shale to sandstone, which resembles the Queen Charlotte Group, Cretaceous Skidegate Formation.
The fault is filled with 1.5 to 4.5 metres of volcanic breccia, cemented by manganese minerals comprised mainly of manganite, pyrolusite,βhousemannite (sic)β,and jacobsite. Veinlets of manganite also extend into the volcanic rocks in the footwall. The showing is exposed along shore for about 168 metres. The manganese values assay up to 50 per cent and average 15 per cent manganese. At the northern end of the exposure a higher-grade lens measuring 15 by 2.4 by 1.5 metres contains between 30 to 40 per cent manganese (Minister of Mines Annual Report 1960, page 11).β
I (Giles Peatfield) have been able to find no more recent work on the property than what is reported in Minfile.
There are no resource estimates available for the occurrence.
Comments by Giles Peatfield on some of the minerals reported from the locality:
Adularia?: Reported by Sutherland Brown (1968), but with no analytical data.
Jacobsite: Reported by Sutherland Brown (1968), but not by Petruk in his detailed examination of material from the occurrence.
All other minerals listed were identified by Petruk (1963).
Comments by Giles Peatfield on the rock types reported from the locality:
Sutherland Brown (1961; 1966; 1968) makes the point that the shale is βcalcareousβ.
The breccia is made up of basalt fragments ranging from 60 centimetres down to a few millimetres (Sutherland Brown, 1961).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
9 valid minerals.
Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
β Dolomite Formula: CaMg(CO3)2 |
β 'Feldspar Group' |
β Hausmannite Formula: Mn2+Mn3+2O4 |
β Hematite Formula: Fe2O3 |
β Ilmenite Formula: Fe2+TiO3 |
β Jacobsite Formula: Mn2+Fe3+2O4 |
β 'K Feldspar' ? References: |
β 'K Feldspar var. Adularia' ? Formula: KAlSi3O8 References: |
β Maghemite Formula: (Fe3+0.67◻0.33)Fe3+2O4 |
β Manganite Formula: Mn3+O(OH) |
β Pyrolusite Formula: Mn4+O2 |
β Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 4 - Oxides and Hydroxides | |||
---|---|---|---|
β | Jacobsite | 4.BB.05 | Mn2+Fe3+2O4 |
β | Hausmannite | 4.BB.10 | Mn2+Mn3+2O4 |
β | Maghemite | 4.BB.15 | (Fe3+0.67β»0.33)Fe3+2O4 |
β | Hematite | 4.CB.05 | Fe2O3 |
β | Ilmenite | 4.CB.05 | Fe2+TiO3 |
β | Quartz | 4.DA.05 | SiO2 |
β | Pyrolusite | 4.DB.05 | Mn4+O2 |
β | Manganite | 4.FD.15 | Mn3+O(OH) |
Group 5 - Nitrates and Carbonates | |||
β | Dolomite | 5.AB.10 | CaMg(CO3)2 |
Unclassified | |||
β | 'K Feldspar var. Adularia' ? | - | KAlSi3O8 |
β | 'Feldspar Group' | - | |
β | 'K Feldspar' ? | - |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | β Manganite | Mn3+O(OH) |
C | Carbon | |
C | β Dolomite | CaMg(CO3)2 |
O | Oxygen | |
O | β K Feldspar var. Adularia | KAlSi3O8 |
O | β Dolomite | CaMg(CO3)2 |
O | β Hausmannite | Mn2+Mn23+O4 |
O | β Hematite | Fe2O3 |
O | β Ilmenite | Fe2+TiO3 |
O | β Jacobsite | Mn2+Fe23+O4 |
O | β Manganite | Mn3+O(OH) |
O | β Maghemite | (Fe3+0.67◻0.33)Fe23+O4 |
O | β Pyrolusite | Mn4+O2 |
O | β Quartz | SiO2 |
Mg | Magnesium | |
Mg | β Dolomite | CaMg(CO3)2 |
Al | Aluminium | |
Al | β K Feldspar var. Adularia | KAlSi3O8 |
Si | Silicon | |
Si | β K Feldspar var. Adularia | KAlSi3O8 |
Si | β Quartz | SiO2 |
K | Potassium | |
K | β K Feldspar var. Adularia | KAlSi3O8 |
Ca | Calcium | |
Ca | β Dolomite | CaMg(CO3)2 |
Ti | Titanium | |
Ti | β Ilmenite | Fe2+TiO3 |
Mn | Manganese | |
Mn | β Hausmannite | Mn2+Mn23+O4 |
Mn | β Jacobsite | Mn2+Fe23+O4 |
Mn | β Manganite | Mn3+O(OH) |
Mn | β Pyrolusite | Mn4+O2 |
Fe | Iron | |
Fe | β Hematite | Fe2O3 |
Fe | β Ilmenite | Fe2+TiO3 |
Fe | β Jacobsite | Mn2+Fe23+O4 |
Fe | β Maghemite | (Fe3+0.67◻0.33)Fe23+O4 |
Other Databases
Link to British Columbia Minfile: | 103K++001 |
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Other Regions, Features and Areas containing this locality
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