Mineral Evolution Database
Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.
Mineral locality data provided by mindat.org



The Mineral Evolution database is currently under development.

The goal of this page is to present localities at which the mineral is found, and estimates of the oldest possible geologic age of the minerals at these localities.


Locality Name:
Imperial Heights, Baraga Co., Michigan, USA


mindat Locality ID: 24871
mindat URL: http://www.mindat.org/loc-24871.html

Tectonic Settings:

Total number of sublocalities beneath "Imperial Heights, Baraga Co., Michigan, USA": 3
Total number of bottom-level sublocalities: 3

Number of Child Localities: 3
Child Localities:
Imperial Heights Road
Ohio Mines (Imperial Mine; Webster Mine)
Spurr Mine

Latitude: 46°32'21"N
Longitude: 88°9'9"W
Decimal Degree (lat, lon): 46.539166666667,-88.1525
AThis mineral is Anthropogenic.
GThis mineral is directly dated.
BThis mineral is reported as having this age.
YThis mineral is using an age reported as an element mineralization period.
OThis mineral is using an age calculated from all data at the locality.
RThe age displayed for this mineral originates from a different, non-child locality.
PThe age displayed for this mineral is the range of ages for this mineral at all of this locality's children.
This mineral's age has not yet been recorded.

This Mineral list contains entries from this locality, including sub-localities. Minerals in bold are reported by mindat.org as occurring directly at this locality, and do not occur at any children (sublocalities) of this locality.

Elements at this locality, including sub-localities: Al C Ca Cu Fe H Mg Na O S Si Zn 

Elements from minerals reported directly at this locality: Al Fe H O Si 

Structural Groups for minerals in this locality: 
AmphiboleAnalcimeCalciteChalcopyriteChloriteChloritoidClayCorundumDiasporeGarnet
GypsumMarcasiteNonePalygorskitePyriteQuartzSphaleriteSpinelStaurolite

22 IMA Minerals at location:
Actinolite  (*)Almandine  (*)Analcime  (*)Calcite  (*)Chalcopyrite  (*)
Chamosite  (*)Chloritoid  (*)Cummingtonite  (*)Dolomite  (*)Goethite  (*)
Graphite  (*)Grunerite  (*)Gypsum  (*)Hematite  (*)Magnetite  (*)
Marcasite  (*)Palygorskite  (*)Pyrite  (*)Quartz  (*)Siderite  (*)
Sphalerite  (*)Staurolite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Actinolite  (*)Amphibole   Ca2(Mg4.5-2.5Fe2+0.5-2.5)Si8O22(OH)22220040,2200413419
Almandine  (*)GarnetFe2+3Al2(SiO4)312200412353
Analcime  (*)AnalcimeNa(AlSi2O6)·H2O12200401627
Calcite  (*)CalciteCa(CO3)122004027770
Chalcopyrite  (*)ChalcopyriteCuFeS2122004027198
Chamosite  (*)Chlorite Clay(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)81220041577
Chloritoid  (*)ChloritoidFe2+Al2O(SiO4)(OH)21220041376
Cummingtonite  (*)Amphibole   Mg2Mg5Si8O22(OH)21220041327
Dolomite  (*)NoneCaMg(CO3)212200409895
Goethite  (*)DiasporeFeO(OH)12200407437
Graphite  (*)NoneC12200402812
Grunerite  (*)Amphibole   Fe2+2Fe2+5Si8O22(OH)22220040,220041223
Gypsum  (*)GypsumCa(SO4)·2H2O12200406890
Hematite  (*)CorundumFe2O32220040,22004114640
Magnetite  (*)SpinelFe2+Fe3+2O42220040,22004114899
Marcasite  (*)MarcasiteFeS212200405674
Palygorskite  (*)Palygorskite Clay(Mg,Al)2Si4O10(OH)·4H2O1220040306
Pyrite  (*)PyriteFeS22220039,22004039462
Quartz  (*)QuartzSiO22220040,22004161156
Siderite  (*)CalciteFe(CO3)12200416417
Sphalerite  (*)SphaleriteZnS122004021482
Staurolite  (*)StauroliteFe2+2Al9Si4O23(OH)0978


No ages have been assigned to this locality yet.
SampleSource LocalityReference URL
FKM-138Spurr Mine, Imperial Heights, Baraga Co., Michigan, USAhttps://www.rockptx.com/fkm-126-to-fkm-150/#FKM-138

All locality data graciously provided by mindat.org

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