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:
Mount Bohemia, Lac La Belle, Keweenaw Co., Michigan, USA

Oldest recorded age at locality: 1060
Youngest recorded age at locality: 1047

mindat Locality ID: 55679
mindat URL: http://www.mindat.org/loc-55679.html

Tectonic Settings:

Total number of sublocalities beneath "Mount Bohemia, Lac La Belle, Keweenaw Co., Michigan, USA": 2
Total number of bottom-level sublocalities: 2

Number of Child Localities: 2
Child Localities:
Mendota Mine
Mount Bohemia Mine

Latitude: 47°23'29"N
Longitude: 88°'46"W
Decimal Degree (lat, lon): 47.391388888889,-88.012777777778

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: Ag Al Ba C Ca Cu Fe H Mg Na O Pb S Si Ti Zn 

Elements from minerals reported directly at this locality: Ag Al Ca Fe Mg O Si 

Structural Groups for minerals in this locality: 
AllophaneBaryteCalciteChalcopyriteClinozoisiteCopperCorundumCovelliteDigeniteEpidote
FeldsparMalachiteNoneNot in a structural groupPyritePyroxeneQuartzRocksaltSphaleriteSpinel
Titanite

25 IMA Minerals at location:
Albite  (*)Anorthite  (*)Augite  (*)Baryte  (*)Bornite  (*)
Calcite  (*)Chalcocite  (*)Chalcopyrite  (*)Chrysocolla  (*)Copper  (*)
Covellite  (*)Cuprite  (*)Digenite  (*)Djurleite  (*)Epidote  (*)
Galena  (*)Hematite  (*)Laumontite  (*)Magnetite  (*)Malachite  (*)
Pyrite  (*)Quartz  (*)Silver  (*)Sphalerite  (*)Titanite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Albite  (*)FeldsparNa(AlSi3O8)106010472221883,2218848803
Anorthite  (*)FeldsparCa(Al2Si2O8)1060104701036
Augite  (*)Pyroxene(Ca,Mg,Fe)2Si2O61060104702060
Baryte  (*)BaryteBa(SO4)10601047122188411547
Bornite  (*)NoneCu5FeS4106010472221883,2218845516
Calcite  (*)CalciteCa(CO3)10601047122188327770
Chalcocite  (*)NoneCu2S106010472221883,2218845707
Chalcopyrite  (*)ChalcopyriteCuFeS2106010472221883,22188427198
Chrysocolla  (*)Allophane(Cu2-xAlx)H2-xSi2O5(OH)4·nH2O1060104712218833531
Copper  (*)CopperCu1060104712218833846
Covellite  (*)CovelliteCuS1060104712218844165
Cuprite  (*)Not in a structural groupCu2O1060104712218842970
Digenite  (*)DigeniteCu1.8S1060104712218841027
Djurleite  (*)NoneCu31S16106010471221884300
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)1060104712218848173
Galena  (*)RocksaltPbS10601047122188424243
Hematite  (*)CorundumFe2O310601047122188414640
Laumontite  (*)Not in a structural groupCaAl2Si4O12·4H2O1060104712218841271
Magnetite  (*)SpinelFe2+Fe3+2O410601047122188414899
Malachite  (*)MalachiteCu2(CO3)(OH)210601047122188312537
Pyrite  (*)PyriteFeS210601047122188439462
Quartz  (*)QuartzSiO210601047122188461156
Silver  (*)CopperAg1060104705186
Sphalerite  (*)SphaleriteZnS10601047122188421482
Titanite  (*)TitaniteCaTi(SiO4)O1060104712218844899



1 Ages assigned to this locality:

Excel IDMax Age (Ma)Min Age (Ma)Age as listed in referenceDating MethodAge InterpretPrioritized?Sample SourceSample NumRun NumAge from other LocalityDated MineralMinerals explicitely stated as having this ageAge applies to these ElementsMinDat Locality IDDated Locality (Max Age)Location as listed in referenceReferenceReference DOIReference IDAge Notes
Mo-0005710601047 Rb-Sr    YesKamiokiteMo3847Keweenaw Co., Michigan, USA Bornhorst et al. (1988)10.2113/gsecongeo.83.3.619EG83_619 


SampleSource LocalityReference URL


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