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:
Copper Falls, Keweenaw Co., Michigan, USA

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

mindat Locality ID: 24161
mindat URL: http://www.mindat.org/loc-24161.html

Tectonic Settings:

Total number of sublocalities beneath "Copper Falls, Keweenaw Co., Michigan, USA": 12
Total number of bottom-level sublocalities: 10

Number of Child Localities: 6
Child Localities:
Arnold Mine
Ashbed Mine
Copper Falls Mine
Humboldt Mine
Owl Creek
Petherick Mine

Latitude: 47°25'18"N
Longitude: 88°12'49"W
Decimal Degree (lat, lon): 47.421666666667,-88.213611111111

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 B Ba C Ca Cu F Fe H K Mg Mn Na O S Si 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AcanthiteAllophaneAnalcimeApophylliteBaryteCalciteClayClinozoisiteCopperEpidote
FeldsparGadoliniteKaoliniteNatroliteNoneNot in a structural groupPrehnitePumpellyiteQuartzRutile
StilbiteThomsonite

22 IMA Minerals at location:
Acanthite  (*)Analcime  (*)Baryte  (*)Calcite  (*)Chalcocite  (*)
Chrysocolla  (*)Copper  (*)Datolite  (*)Epidote  (*)Fluorapophyllite-(K)  (*)
Kaolinite  (*)Laumontite  (*)Manganite  (*)Mesolite  (*)Microcline  (*)
Natrolite  (*)Prehnite  (*)Pumpellyite-(Mg)  (*)Quartz  (*)Silver  (*)
Stilbite-Ca  (*)Thomsonite-Ca  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Acanthite  (*)AcanthiteAg2S1060104712217982793
Analcime  (*)AnalcimeNa(AlSi2O6)·H2O106010474221797,221798,221803,2218071627
Baryte  (*)BaryteBa(SO4)10601047122179811547
Calcite  (*)CalciteCa(CO3)106010474221798,221804,221806,22180727770
Chalcocite  (*)NoneCu2S1060104712217985707
Chrysocolla  (*)Allophane(Cu2-xAlx)H2-xSi2O5(OH)4·nH2O1060104712217983531
Copper  (*)CopperCu106010479221798,221799,221800,221801,221802,221803,221804,221805,2218073846
Datolite  (*)GadoliniteCaB(SiO4)(OH)106010475221797,221798,221801,221803,221807498
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)106010472221798,2218078173
Fluorapophyllite-(K)  (*)ApophylliteKCa4Si8O20F·8H2O106010471221806303
Kaolinite  (*)Clay KaoliniteAl2Si2O5(OH)41060104712217985591
Laumontite  (*)Not in a structural groupCaAl2Si4O12·4H2O1060104712217981271
Manganite  (*)RutileMn3+O(OH)106010471221797770
Mesolite  (*)NatroliteNa2Ca2(Si9Al6)O30·8H2O106010471221797425
Microcline  (*)FeldsparK(AlSi3O8)1060104712217984924
Natrolite  (*)NatroliteNa2(Si3Al2)O10·2H2O106010474221796,221797,221798,2218071236
Prehnite  (*)PrehniteCa2Al(Si3Al)O10(OH)2106010473221798,221806,2218071898
Pumpellyite-(Mg)  (*)PumpellyiteCa2MgAl2(Si2O7)(SiO4)(OH)2·H2O106010473221798,221805,221807106
Quartz  (*)QuartzSiO2106010473221798,221806,22180761156
Silver  (*)CopperAg106010473221798,221805,2218075186
Stilbite-Ca  (*)StilbiteNaCa4(Si27Al9)O72·28H2O106010471221798268
Thomsonite-Ca  (*)ThomsoniteNaCa2(Al5Si5)O20·6H2O106010471221798452



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


All locality data graciously provided by mindat.org

All age data...

Other copyright data...