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Monteith Bay quarry, Alberni Mining Division, Vancouver Island, British Columbia, Canadai
Regional Level Types
Monteith Bay quarryQuarry
Alberni Mining DivisionDivision
Vancouver IslandIsland
British ColumbiaProvince
CanadaCountry

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Latitude & Longitude (WGS84):
50° 7' 52'' North , 127° 17' 52'' West
Latitude & Longitude (decimal):
50.13111,-127.29778
GeoHash:
G#: c0vmpq0df
GRN:
N34W60
Type:
Quarry
Köppen climate type:
Cfb : Temperate oceanic climate
Mindat Locality ID:
30126
Long-form identifier:
mindat:1:2:30126:7
GUID (UUID V4):
0


The Monteith Bay geyserite deposit consists mainly of replacement silica in a concentration greater than 96 per cent SiO2. It is a paleo-hotsprings deposit of massive thickness, originally of gently dipping bedding, now somewhat faulted, bent and dipping to the south about 40 to 50 degrees.

The volcanic hostrocks in the Monteith Bay area consist of hornblende-plagioclase porphyritic andesite, amygdaloidal flows and flow breccias of the Lower Jurasssic Bonanza Group. Late intrusive rocks occur as fine grained porphyritic andesite dikes and sills.

The rocks are altered to various degrees, with silicic and advanced argillic zones present. The lack of structural control, of associated large intrusions and overall distribution of the alteration assemblages suggest that the silicification took place contemporaneously with volcanism before significant structural dislocation. The sericite-rich alteration in Monteith Bay appears to correlate directly with the emplacement and shearing of the later andesite dikes. The presence of chalcedonic silica, alunite and pyrophyllite indicate a probable near surface origin for the main phase of alteration.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


8 valid minerals.

Detailed Mineral List:

ⓘ Alunite
Formula: KAl3(SO4)2(OH)6
ⓘ Anhydrite
Formula: CaSO4
ⓘ Gypsum
Formula: CaSO4 · 2H2O
ⓘ Kaolinite
Formula: Al2(Si2O5)(OH)4
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Muscovite var. Sericite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Pyrite
Formula: FeS2
ⓘ Pyrophyllite
Formula: Al2Si4O10(OH)2
ⓘ Quartz
Formula: SiO2

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘPyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘAnhydrite7.AD.30CaSO4
ⓘAlunite7.BC.10KAl3(SO4)2(OH)6
ⓘGypsum7.CD.40CaSO4 · 2H2O
Group 9 - Silicates
ⓘPyrophyllite9.EC.10Al2Si4O10(OH)2
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘvar. Sericite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘKaolinite9.ED.05Al2(Si2O5)(OH)4

List of minerals for each chemical element

HHydrogen
Hⓘ AluniteKAl3(SO4)2(OH)6
Hⓘ GypsumCaSO4 · 2H2O
Hⓘ KaoliniteAl2(Si2O5)(OH)4
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ PyrophylliteAl2Si4O10(OH)2
Hⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
OOxygen
Oⓘ AluniteKAl3(SO4)2(OH)6
Oⓘ AnhydriteCaSO4
Oⓘ GypsumCaSO4 · 2H2O
Oⓘ KaoliniteAl2(Si2O5)(OH)4
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ PyrophylliteAl2Si4O10(OH)2
Oⓘ QuartzSiO2
Oⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
AlAluminium
Alⓘ AluniteKAl3(SO4)2(OH)6
Alⓘ KaoliniteAl2(Si2O5)(OH)4
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ PyrophylliteAl2Si4O10(OH)2
Alⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
SiSilicon
Siⓘ KaoliniteAl2(Si2O5)(OH)4
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ PyrophylliteAl2Si4O10(OH)2
Siⓘ QuartzSiO2
Siⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
SSulfur
Sⓘ AluniteKAl3(SO4)2(OH)6
Sⓘ AnhydriteCaSO4
Sⓘ GypsumCaSO4 · 2H2O
Sⓘ PyriteFeS2
KPotassium
Kⓘ AluniteKAl3(SO4)2(OH)6
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
CaCalcium
Caⓘ AnhydriteCaSO4
Caⓘ GypsumCaSO4 · 2H2O
FeIron
Feⓘ PyriteFeS2

Other Databases

Link to British Columbia Minfile:092L 343

Other Regions, Features and Areas containing this locality

Canada
North AmericaContinent
North America PlateTectonic Plate

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