Cream Silver Deposit (Sherwood Mine), Buttle Lake, Alberni Mining Division, Vancouver Island, British Columbia, Canadai
Regional Level Types | |
---|---|
Cream Silver Deposit (Sherwood Mine) | Deposit (Inactive) |
Buttle Lake | Lake |
Alberni Mining Division | Division |
Vancouver Island | Island |
British Columbia | Province |
Canada | Country |
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Latitude & Longitude (WGS84):
49° 27' 51'' North , 125° 31' 22'' West
Latitude & Longitude (decimal):
Type:
Deposit (Inactive) - last checked 2020
Köppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Cumberland | 2,630 (2017) | 38.9km |
Tofino | 1,655 (2014) | 44.4km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
Club | Location | Distance |
---|---|---|
Courtenay Gem and Mineral Club | Courtenay, British Columbia | 47km |
Mindat Locality ID:
358822
Long-form identifier:
mindat:1:2:358822:5
GUID (UUID V4):
e014e39d-9acb-4c97-b2a8-96b4acbc7ed9
The Cream Silver deposit, more correctly known as the Sherwood Mine, is located near the headwaters of Drinkwater Creek, 12 kilometres south of the south end of Buttle Lake, about 46 kilometres west-southwest of Courtenay, British Columbia. The area is within the southern part of Strathcona Provincial Park.
“The Sherwood occurrence, located at the southern end of the Buttle Lake uplift, is underlain by cherty argillite and tuff of the Paleozoic Sicker Group. The sediments and volcanics are overlain by limestone of the Permian to Pennsylvanian Azure Lake Formation, Buttle Lake Group. A large granodiorite stock of the Jurassic Island Plutonic Suite is located approximately 2 to 4 kilometres east.”
“The Sherwood vein occupies a 070 to 080 degree striking shear zone that dips 65 to 72 degrees north. Strong open fractures bisect the shear zone at 090 to 120 degrees. The shear zone is up to 2.0 metres wide and contains intensely altered gouge, and lenses of quartz that range up to 0.76 metres in width. Several parallel quartz veins are present, separated by wall rock or clay gouge. Abundant, narrow quartz veins branch off the main structure.
Primary vein material consists of quartz, sphalerite, galena, covellite, chalcopyrite and pyrrhotite. Much of the vein has been reduced to rusty, crumbly and often porous material. Studies indicate the primary sulphide mineralogy is altered to malachite, marcasite, anglesite, covellite, and possibly other secondary minerals. Silver values are associated primarily with galena. The gold mineralogy is not known.”
“In 1942, 20 tonnes of ore were shipped, producing 1866 grams of gold, 3110 grams of silver, and values in lead and copper.”
Lying as they do within the outline of Strathcona Provincial Park, the claims were expropriated by the Provincial Government in the late 1980’s.
Comments by Giles Peatfield on some of the minerals reported from the locality:
Anglesite: Reported by Sargent (1941) as an alteration product of primary sufide.
Calcite?: Reported by Dandy (1988) as “carbonate”, but most likely calcite.
Owyheeite: Reported as X-ray confirmed by Thompson (1950).
Pyrargyrite?: This was reported by Holcapek (1985). His report is not readily available, but his work is quoted by Dandy (1988). I would regard this as tentative for the locality.
Siderite: Reported by Dandy (1988).
Giles Peatfield reports: "All rock type references [he has listed] are from Dandy (1988)."
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
14 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:
ⓘ Arsenopyrite Formula: FeAsS |
ⓘ Calcite Formula: CaCO3 |
ⓘ Chalcopyrite Formula: CuFeS2 |
ⓘ Covellite Formula: CuS References: |
ⓘ 'Feldspar Group' References: |
ⓘ Galena Formula: PbS |
ⓘ Malachite Formula: Cu2(CO3)(OH)2 References: |
ⓘ Marcasite Formula: FeS2 References: |
ⓘ Owyheeite Formula: Ag3Pb10Sb11S28 |
ⓘ Pyrargyrite Formula: Ag3SbS3 |
ⓘ Pyrite Formula: FeS2 |
ⓘ 'Pyroxene Group' Formula: ADSi2O6 References: |
ⓘ Pyrrhotite Formula: Fe1-xS References: |
ⓘ Quartz Formula: SiO2 |
ⓘ Siderite Formula: FeCO3 |
ⓘ Sphalerite Formula: ZnS |
ⓘ 'Tetrahedrite Subgroup' Formula: Cu6(Cu4C2+2)Sb4S12S |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 2 - Sulphides and Sulfosalts | |||
---|---|---|---|
ⓘ | Covellite | 2.CA.05a | CuS |
ⓘ | Sphalerite | 2.CB.05a | ZnS |
ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
ⓘ | Pyrrhotite | 2.CC.10 | Fe1-xS |
ⓘ | Galena | 2.CD.10 | PbS |
ⓘ | Pyrite | 2.EB.05a | FeS2 |
ⓘ | Marcasite | 2.EB.10a | FeS2 |
ⓘ | Arsenopyrite | 2.EB.20 | FeAsS |
ⓘ | Pyrargyrite | 2.GA.05 | Ag3SbS3 |
ⓘ | 'Tetrahedrite Subgroup' | 2.GB.05 | Cu6(Cu4C2+2)Sb4S12S |
ⓘ | Owyheeite | 2.HC.35 | Ag3Pb10Sb11S28 |
Group 4 - Oxides and Hydroxides | |||
ⓘ | Quartz | 4.DA.05 | SiO2 |
Group 5 - Nitrates and Carbonates | |||
ⓘ | Calcite | 5.AB.05 | CaCO3 |
ⓘ | Siderite | 5.AB.05 | FeCO3 |
ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
Unclassified | |||
ⓘ | 'Feldspar Group' | - | |
ⓘ | 'Pyroxene Group' | - | ADSi2O6 |
List of minerals for each chemical element
Other Databases
Link to British Columbia Minfile: | 092F 069 |
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