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:
Manganese Mine, Copper Harbor, Keweenaw Co., Michigan, USA

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

mindat Locality ID: 3852
mindat URL: http://www.mindat.org/loc-3852.html

Tectonic Settings:

Total number of sublocalities beneath "Manganese Mine, Copper Harbor, Keweenaw Co., Michigan, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 47°27'17"N
Longitude: 87°51'54"W
Decimal Degree (lat, lon): 47.454722222222,-87.865

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 B Ba C Ca Cu Fe H Mn Na O S Si V 

Elements from minerals reported directly at this locality: Al B Ba C Ca Cu Fe H Mn Na O S Si V 

Structural Groups for minerals in this locality: 
AdeliteAllophaneAnalcimeBaryteBrauniteCalciteClinozoisiteCopperCoronaditeCorundum
EpidoteGadoliniteMalachiteNoneNot in a structural groupPrehnitePumpellyiteRutileVolborthite

23 IMA Minerals at location:
Analcime  (*)Baryte  (*)Braunite  (*)Calcite  (*)Chrysocolla  (*)
Copper  (*)Cuprite  (*)Datolite  (*)Epidote  (*)Hematite  (*)
Hollandite  (*)Laumontite  (*)Macfallite  (*)Malachite  (*)Manganite  (*)
Neltnerite  (*)Orientite  (*)Prehnite  (*)Pumpellyite-(Mn2+)  (*)Pyrolusite  (*)
Ranciéite  (*)Tangeite  (*)Volborthite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Analcime  (*)AnalcimeNa(AlSi2O6)·H2O1060104701627
Baryte  (*)BaryteBa(SO4)10601047011547
Braunite  (*)BrauniteMn2+Mn3+6O8(SiO4)106010470483
Calcite  (*)CalciteCa(CO3)10601047027770
Chrysocolla  (*)Allophane(Cu2-xAlx)H2-xSi2O5(OH)4·nH2O1060104703531
Copper  (*)CopperCu1060104703846
Cuprite  (*)Not in a structural groupCu2O1060104702970
Datolite  (*)GadoliniteCaB(SiO4)(OH)106010470498
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)1060104708173
Hematite  (*)CorundumFe2O310601047014640
Hollandite  (*)CoronaditeBa(Mn4+6Mn3+2)O16106010470243
Laumontite  (*)Not in a structural groupCaAl2Si4O12·4H2O1060104701271
Macfallite  (*)NoneCa2Mn3+3(SiO4)(Si2O7)(OH)31060104706
Malachite  (*)MalachiteCu2(CO3)(OH)210601047012537
Manganite  (*)RutileMn3+O(OH)106010470770
Neltnerite  (*)BrauniteCaMn3+6O8(SiO4)1060104708
Orientite  (*)NoneCa8Mn3+10(SiO4)3(Si3O10)3(OH)10·4H2O1060104708
Prehnite  (*)PrehniteCa2Al(Si3Al)O10(OH)21060104701898
Pumpellyite-(Mn2+)  (*)PumpellyiteCa2Mn2+Al2(Si2O7)(SiO4)(OH)2·H2O10601047015
Pyrolusite  (*)RutileMnO21060104703106
Ranciéite  (*)None(Ca,Mn2+)0.2(Mn4+,Mn3+)O2·0.6H2O106010470177
Tangeite  (*)AdeliteCaCu(VO4)(OH)10601047060
Volborthite  (*)VolborthiteCu3V2O7(OH)2·2H2O106010470155



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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