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:
Chalk Mountain Mine, Spruce Pine, Spruce Pine District, Mitchell Co., North Carolina, USA

Oldest recorded age at locality: 367
Youngest recorded age at locality: 365

mindat Locality ID: 5508
mindat URL: http://www.mindat.org/loc-5508.html

Tectonic Settings:

Total number of sublocalities beneath "Chalk Mountain Mine, Spruce Pine, Spruce Pine District, Mitchell Co., North Carolina, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 35°53'56"N
Longitude: 82°6'19"W
Decimal Degree (lat, lon): 35.898888888889,-82.105277777778
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 Ce Cu Fe H K Na O P Si U Zn 

Elements from minerals reported directly at this locality: Al C Ca Ce Cu Fe H K Na O P Si U Zn 

Structural Groups for minerals in this locality: 
AllaniteAmorphousAutuniteClayClinozoisiteEpidoteFeldsparGarnetMalachiteMica
NoneQuartzSpinel

15 IMA Minerals at location:
Albite  (*)Allanite-(Ce)  (*)Almandine  (*)Autunite  (*)Clinozoisite  (*)
Gahnite  (*)Malachite  (*)Metatorbernite  (*)Microcline  (*)Muscovite  (*)
Opal  (*)Uranophane-β  (*)Quartz  (*)Torbernite  (*)Uranophane-α  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Albite  (*)FeldsparNa(AlSi3O8)36736508803
Allanite-(Ce)  (*)Allanite EpidoteCaCe(Al2Fe2+)[Si2O7][SiO4]O(OH)3673650706
Almandine  (*)GarnetFe2+3Al2(SiO4)336736502353
Autunite  (*)AutuniteCa(UO2)2(PO4)2·10-12H2O36736501272
Clinozoisite  (*)Clinozoisite EpidoteCa2Al3[Si2O7][SiO4]O(OH)36736501025
Gahnite  (*)SpinelZnAl2O43673650445
Malachite  (*)MalachiteCu2(CO3)(OH)2367365012537
Metatorbernite  (*)NoneCu(UO2)2(PO4)2·8H2O3673650443
Microcline  (*)FeldsparK(AlSi3O8)36736504924
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)2367365017380
Opal  (*)AmorphousSiO2·nH2O36736502994
Uranophane-β  (*)NoneCa(UO2)2(SiO3OH)2·5H2O3673650144
Quartz  (*)QuartzSiO2367365061156
Torbernite  (*)NoneCu(UO2)2(PO4)2·12H2O36736501059
Uranophane-α  (*)NoneCa(UO2)2(SiO3OH)2·5H2O3673650890


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
Bradley_2012_164367365366±1U/Pb zircon  YesZircon  49771McHone Mine Pegmatite, Spruce Pine District, Mitchell Co., North Carolina, USAMcHoneMcCauley and Bradley (2014)10.3749/canmin.52.2.183CM52_183 

SampleSource LocalityReference URL
R070683Chalk Mountain Mine, Spruce Pine, Spruce Pine District, Mitchell Co., North Carolina, USAhttps://rruff.info/R070683

All locality data graciously provided by mindat.org

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