Mineral Evolution Database
Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.
Mineral locality data provided by mindat.org

Important Update News

The RRUFF Project has been migrated to RRUFF.net. Please update your bookmarks immediately, if you have not done so.

The data on this website is already three years out of date, and the entire website will be taken offline before the end of the year.

We are grateful to NASA for the funding of this effort.




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:
Portage Co., Wisconsin, USA

Oldest recorded age at locality: 1772
Youngest recorded age at locality: 1427

mindat Locality ID: 212353
mindat URL: http://www.mindat.org/loc-212353.html

Tectonic Settings:

Total number of sublocalities beneath "Portage Co., Wisconsin, USA": 2
Total number of bottom-level sublocalities: 2

Number of Child Localities: 2
Child Localities:
Graphite Mine
Stevens Point

Latitude: 44°32'48"N
Longitude: 89°40'13"W
Decimal Degree (lat, lon): 44.546666666667,-89.670277777778
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 Cu Fe H K Mg O S Si Ti Zr 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AmphiboleChalcopyriteClayClinozoisiteEpidoteMicaNonePyriteQuartzTitanite
Zircon

9 IMA Minerals at location:
Actinolite  (*)Chalcopyrite  (*)Epidote  (*)Graphite  (*)Muscovite  (*)
Pyrite  (*)Quartz  (*)Titanite  (*)Zircon  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Actinolite  (*)Amphibole   Ca2(Mg4.5-2.5Fe2+0.5-2.5)Si8O22(OH)21772142712889153419
Chalcopyrite  (*)ChalcopyriteCuFeS2177214272288914,28891527198
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)1772142712889158173
Graphite  (*)NoneC12889142812
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)217721427128891517380
Pyrite  (*)PyriteFeS2177214272288914,28891539462
Quartz  (*)QuartzSiO217721427128891561156
Titanite  (*)TitaniteCaTi(SiO4)O1772142712889154899
Zircon  (*)ZirconZr(SiO4)1772142712889155251


15 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
USGS-U-Th-Pb-00397_206_238149814981498206_238 zircon   Zircon  107406Stevens Point, Portage Co., Wisconsin, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00397_207_206176517651765207_206 zircon   Zircon  107406Stevens Point, Portage Co., Wisconsin, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00397_207_235161216121612207_235 zircon   Zircon  107406Stevens Point, Portage Co., Wisconsin, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00398_206_238144814481448206_238 zircon   Zircon  107406Stevens Point, Portage Co., Wisconsin, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00398_207_206175417541754207_206 zircon   Zircon  107406Stevens Point, Portage Co., Wisconsin, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00398_207_235157715771577207_235 zircon   Zircon  107406Stevens Point, Portage Co., Wisconsin, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00811_206_238149414941494206_238age of intrusionzircon   Zircon  107406Stevens Point, Portage Co., Wisconsin, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00811_207_206177217721772207_206age of intrusionzircon   Zircon  107406Stevens Point, Portage Co., Wisconsin, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00811_207_235161316131613207_235age of intrusionzircon   Zircon  107406Stevens Point, Portage Co., Wisconsin, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00812_206_238142714271427206_238age of intrusionzircon   Zircon  107406Stevens Point, Portage Co., Wisconsin, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00812_207_206175617561756207_206age of intrusionzircon   Zircon  107406Stevens Point, Portage Co., Wisconsin, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00812_207_235156515651565207_235age of intrusionzircon   Zircon  107406Stevens Point, Portage Co., Wisconsin, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00814_206_238144814481448206_238age of intrusionzircon   Zircon  107406Stevens Point, Portage Co., Wisconsin, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00814_207_206175417541754207_206age of intrusionzircon   Zircon  107406Stevens Point, Portage Co., Wisconsin, USA USGS-U-Th-Pb USGS-U-Th-Pb 
USGS-U-Th-Pb-00814_207_235157715771577207_235age of intrusionzircon   Zircon  107406Stevens Point, Portage Co., Wisconsin, USA USGS-U-Th-Pb USGS-U-Th-Pb 

SampleSource LocalityReference URL

All locality data graciously provided by mindat.org

All age data...

Other copyright data...