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:
North Fork District, Grant Co., Oregon, USA


mindat Locality ID: 68604
mindat URL: http://www.mindat.org/loc-68604.html

Tectonic Settings:

Total number of sublocalities beneath "North Fork District, Grant Co., Oregon, USA": 36
Total number of bottom-level sublocalities: 34

Number of Child Localities: 25
Child Localities:
Blackwell Placer
Camp Creek Claims
Cole Et Al Occurrence
French Diggings Placers (Klondyke; Currey Mine)
Gold Bug Occurrence
Gold Eagle Occurrence (Donaldson; Bluebird)
Gold Mine (MRDS - 10052925)
Henry Huffman Prospect
Iron Dike Prospect
J. B. Asbestos Occurrence
Kern Placer
N. Fk. John Day RARE II Area
N. Fk. John Day River RARE II Area
North Fork Mine (Klopp; David West Placers; Dadum)
North Fork Placers (North Fork Placer; Boulder Placer Claims)
Oregon Gulch Placer
Oriental Placer
Record Occurrence
Reynolds Placer (Robin Claim; Meadow Lark Claim; Blue Bird Claim)
Rock Bar Placer
Treasure Zone
Unnamed Gold Occurrence (MRDS - 10249531)
Unnamed Gold Prospect (MRDS - 10298946)
William Smith Occurrence
You And I Claim

Latitude: 44°54'33"N
Longitude: 118°36'38"W
Decimal Degree (lat, lon): 44.909166666667,-118.61055555556
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 Au C Cr Cu Fe H K O Pb S Sb Si 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
ChalcopyriteClayCopperCorundumMalachiteMicaNonePyriteQuartzRocksalt
SpinelStibniteTetrahedrite

11 IMA Minerals at location:
Chalcopyrite  (*)Chromite  (*)Galena  (*)Gold  (*)Hematite  (*)
Malachite  (*)Muscovite  (*)Pyrite  (*)Quartz  (*)Stibnite  (*)
Tetrahedrite-(Zn)  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Chalcopyrite  (*)ChalcopyriteCuFeS22258061,25806527198
Chromite  (*)SpinelFe2+Cr2O412580883902
Galena  (*)RocksaltPbS125806124243
Gold  (*)CopperAu2258063,25808530554
Hematite  (*)CorundumFe2O3125806114640
Malachite  (*)MalachiteCu2(CO3)(OH)2125806512537
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)2125806117380
Pyrite  (*)PyriteFeS22258061,25806539462
Quartz  (*)QuartzSiO22258061,25806561156
Stibnite  (*)StibniteSb2S312580653418
Tetrahedrite-(Zn)  (*)TetrahedriteCu6(Cu4Zn2)Sb4S1312580655317


No ages have been assigned to this locality yet.
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All locality data graciously provided by mindat.org

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