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Nicopor Mine, Pays Plat Lake Area, Thunder Bay District, Ontario, Canadai
Regional Level Types
Nicopor MineMine
Pays Plat Lake AreaArea
Thunder Bay DistrictDistrict
OntarioProvince
CanadaCountry

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PhotosMapsSearch
Latitude & Longitude (WGS84):
48° 53' 38'' North , 87° 18' 7'' West
Latitude & Longitude (decimal):
Type:
Mindat Locality ID:
16982
Long-form identifier:
mindat:1:2:16982:9
GUID (UUID V4):
79f922c7-f3ac-4e65-90aa-9b66e11ab3b7


Geology:
The deposit is classed as a 'mafic-ultramafic intrusion-hosted ' deposit. The prospect occurs at the northern contact of the Schreiber greenstone belt with the Crosman Lake granitic batholith. The greenstone belt assemblage consists of an east trending, homoclinal succession of mafic to felsic metavolcanic rocks intruded by sill like gabbro bodies. In the vicinity of the Nicopor prospect the massive amphibolite host had been largely interpreted by various exploration geologists as a metamorphosed and altered mafic to intermediate volcanic rock. Recent mapping, based to a large extent on comparison with other mafic rocks nearby, suggests that this amphibolitic unit is gabbroic rather than volcanic. This interpretation also accounts to some degree for the source of the nickel and copper rich sulphide mineralization as discussed below. Base metal sulphides occur as massive to vein like and net textured aggregates in a narrow, linear zone that follows the contact between a dark green, massive amphibolite (melagabbro) on the south and medium grained, equigranular, pink granite on the north. A quartz bearing, mafic rock typically occurs between the melagabbro and the granite and has been mapped as leucogabbro, possibly representing a hybrid phase between the two main host rocks. This mineralized zone has developed a conspicuous, extensive gossan that obscures host rock and sulphide relationships. White iron hydroxides and rare malachite have developed as stains on deeply weathered sulphides. Several shallow pits have been sunk on this northeast striking zone over a distance of approximately 75 m. The sulphide zone on surface ranges up to approximately 2 m in width and rapidly grades outwards into disseminated mineralization in both the gabbro and granite. The sulphide zone is crosscut by barren aplite, syenite and feldspar porphyry dykes.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


8 valid minerals.

Detailed Mineral List:

'Amphibole Supergroup'
Formula: AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Chalcopyrite
Formula: CuFeS2
'Chlorite Group'
'Feldspar Group'
Magnetite
Formula: Fe2+Fe3+2O4
'Mica Group'
Pentlandite
Formula: (NixFey)Σ9S8
Pyrite
Formula: FeS2
Pyrrhotite
Formula: Fe1-xS
Quartz
Formula: SiO2
Smythite
Formula: (Fe,Ni)3+xS4 (x=0-0.3)
Violarite
Formula: Fe2+Ni3+2S4

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Pentlandite2.BB.15(NixFey)Σ9S8
Chalcopyrite2.CB.10aCuFeS2
Pyrrhotite2.CC.10Fe1-xS
Smythite2.CC.10(Fe,Ni)3+xS4 (x=0-0.3)
Violarite2.DA.05Fe2+Ni3+2S4
Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
Magnetite4.BB.05Fe2+Fe3+2O4
Quartz4.DA.05SiO2
Unclassified
'Amphibole Supergroup'-AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Chlorite Group'-
'Feldspar Group'-
'Mica Group'-

List of minerals for each chemical element

HHydrogen
H Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
OOxygen
O Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
O MagnetiteFe2+Fe23+O4
O QuartzSiO2
FFluorine
F Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
AlAluminium
Al Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
SiSilicon
Si Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Si QuartzSiO2
SSulfur
S ChalcopyriteCuFeS2
S Pentlandite(NixFey)Σ9S8
S PyriteFeS2
S PyrrhotiteFe1-xS
S Smythite(Fe,Ni)3+xS4 (x=0-0.3)
S ViolariteFe2+Ni23+S4
ClChlorine
Cl Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
TiTitanium
Ti Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
FeIron
Fe ChalcopyriteCuFeS2
Fe MagnetiteFe2+Fe23+O4
Fe Pentlandite(NixFey)Σ9S8
Fe PyriteFeS2
Fe PyrrhotiteFe1-xS
Fe Smythite(Fe,Ni)3+xS4 (x=0-0.3)
Fe ViolariteFe2+Ni23+S4
NiNickel
Ni Pentlandite(NixFey)Σ9S8
Ni Smythite(Fe,Ni)3+xS4 (x=0-0.3)
Ni ViolariteFe2+Ni23+S4
CuCopper
Cu ChalcopyriteCuFeS2

Other Regions, Features and Areas containing this locality

North America PlateTectonic Plate

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

 
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