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:
Algomah Mine, Mass City, Ontonagon Co., Michigan, USA


mindat Locality ID: 8397
mindat URL: http://www.mindat.org/loc-8397.html

Tectonic Settings:

Total number of sublocalities beneath "Algomah Mine, Mass City, Ontonagon Co., Michigan, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 0°0'0"N
Longitude: 0°0'0"E
Decimal Degree (lat, lon): 0,0
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 As B C Ca Cl Cu Fe H Mg Mn Na O Si Zn 

Elements from minerals reported directly at this locality: Ag Al As B C Ca Cl Cu Fe H Mg Mn Na O Si Zn 

Structural Groups for minerals in this locality: 
AllophaneAtacamiteCalciteClayClinozoisiteCopperCorundumEpidoteGadoliniteMalachite
NoneNot in a structural groupPlancheitePumpellyiteQuartzSmectite-vermiculiteSphalerite

23 IMA Minerals at location:
Algodonite  (*)Atacamite  (*)Azurite  (*)Calcite  (*)Chrysocolla  (*)
Copper  (*)Crednerite  (*)Cuprite  (*)Datolite  (*)Dioptase  (*)
Epidote  (*)Hematite  (*)Kinoite  (*)Malachite  (*)Nantokite  (*)
Paramelaconite  (*)Paratacamite  (*)Plancheite  (*)Pumpellyite-(Mg)  (*)Quartz  (*)
Saponite  (*)Silver  (*)Tenorite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Algodonite  (*)Not in a structural groupCu1-xAsx (x ≈ 0.15)041
Atacamite  (*)AtacamiteCu2Cl(OH)30544
Azurite  (*)Not in a structural groupCu3(CO3)2(OH)205509
Calcite  (*)CalciteCa(CO3)027770
Chrysocolla  (*)Allophane(Cu2-xAlx)H2-xSi2O5(OH)4·nH2O03531
Copper  (*)CopperCu03846
Crednerite  (*)NoneCuMnO2035
Cuprite  (*)Not in a structural groupCu2O02970
Datolite  (*)GadoliniteCaB(SiO4)(OH)0498
Dioptase  (*)NoneCuSiO3·H2O0164
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)08173
Hematite  (*)CorundumFe2O3014640
Kinoite  (*)NoneCa2Cu2Si3O10·2H2O017
Malachite  (*)MalachiteCu2(CO3)(OH)2012537
Nantokite  (*)SphaleriteCuCl035
Paramelaconite  (*)NoneCu1+2Cu2+2O3013
Paratacamite  (*)AtacamiteCu3(Cu,Zn)Cl2(OH)60158
Plancheite  (*)PlancheiteCu8(Si4O11)2(OH)4·H2O074
Pumpellyite-(Mg)  (*)PumpellyiteCa2MgAl2(Si2O7)(SiO4)(OH)2·H2O0106
Quartz  (*)QuartzSiO2061156
Saponite  (*)Clay Smectite-vermiculite(Ca,Na)0.3(Mg,Fe)3(Si,Al)4O10(OH)2·4H2O0301
Silver  (*)CopperAg05186
Tenorite  (*)NoneCuO01101


No ages have been assigned to this locality yet.

All locality data graciously provided by mindat.org

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