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The data on this website is already three years out of date, and the entire website will be taken offline before the end of the year.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:
Illinois River District, Josephine Co., Oregon, USA

Oldest recorded age at locality: 203
Youngest recorded age at locality: 163

mindat Locality ID: 66185
mindat URL: http://www.mindat.org/loc-66185.html

Tectonic Settings:

Total number of sublocalities beneath "Illinois River District, Josephine Co., Oregon, USA": 136
Total number of bottom-level sublocalities: 135

Number of Child Localities: 84
Child Localities:
Al Blasson Occurrence
Anderson Mine (Holiday Mine; Anderson And Wilson)
Apex Occurrence.
Arnot Occurrence
Becca And Morning Group (Casey Prospect)
Big Bear
Big Bill Occurrence
Big Chief Chrome
Big Four Chromite
Black Bear Claim
Black Bear Occurrence
Black Diamond
Black King Prospect
Black Otter Claim
Black Rock Mine
Blackbird Claims 1-3
Blue Lode Occurrence
Bluff Prospect
Brown Scratch (Anderson-Fisher Chrome Mine; Center; Red Scratch)
Buckskin Mine
Butte Occurrence (Kerby No. 33)
Calumet Copper Prospect
Calumet Mine (Albright Mine; Elder Property)
Cedar Creek Occurrence
Chetco Group
Chrome Occurrence (MRDS - 10032182)
Chrome Occurrence (MRDS - 10032296)
Chrome Prospect (MRDS - 10053408)
Cobalt Group
Copper Boy Occurrence (Calumet Copper)
Courier Mine
Crown Mine (Nichols Prospect; Hammer; Upper Hammon No. 38?)
Daley Creek Chromite Mine
Dark Star
Deep Gorge Chromite Claim (Grissom Chrome)
Dirty Face (Bucheit Handwork & Meyers; Burro; Peach; Happy Jack; Hansen)
Early Sunrise Claim
Eureka Mine (Log Cabin; July; Black Cat)
Fall Creek Copper (United Copper)
February Claim
Foster Asbestos Occurrence (Bear Placer)
Freckles Placer
Free And Easy Mine (Free And Easy Laterite)
Gold Blanket Mine
Gold Placer Prospect (MRDS - 10053417)
Gold Placer Prospect (MRDS - 10053418)
Gold Prospect (Kerby No. 80)
Gold Prospect (Kerby No. 84)
Gold Prospect (Kerby No. 85)
Gold Ridge Prospect (Pocket Knoll)
Golden Princess
Griffin Chromite (Mikes Gulch; Nickel Plate)
Hap Claims (Hawkins)
Holton Creek Limestone Deposit
Horseshoe Lode Chrome (Squaw Creek Group)
Jim Fisher Chrome Prospect (Blackbird Nos. 1-3)
Josephine Creek Placers (Independence; Gold King; Old Ray; Billman; Norton; Golden Princess; Bear)
Lone Queen Ledge Mine
Meander Nos. 1 & 2
Mighty Joe
Nickel-Chrome Group (Eight Dollar Mountain Group; Horstman Group; Eight Dollar No. 1)
Old Glory Mine
Oregon Chrome Mines Property (Illinois River Mine; Black Beauty; Robertson Mine)
Phillip Property (Vanguard Property)
Rayboy Occurrence
Red Dog Van Gwyn Group
Red Hill Claim
Revell Placer (Meander No. 2 Claims; Meander No. 1; Buena Vista)
Riha Chromite Property
Saddle Prospect
Shade Chromite Mine
Sherman Placer
Sordy's Chromite (Briggs Creek Chromite Deposit)
Squaw Creek Chromite (Rhea Occurrence)
Stecher Placer
Sulfide No. 1 Occurrence
Summit Group
Swede Creek Occurrence (Gallaher)
Swede Creek Placer
Toots Mine
United Copper Gold Mines Company Property
Unnamed Placer (MRDS - 10176684)
White Pine Mine
Williams And Adylott Mine (Gold Dust; Live Oak; Hoover Gulch Group)

Latitude: 42°18'12"N
Longitude: 123°42'40"W
Decimal Degree (lat, lon): 42.303333333333,-123.71111111111
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: Au C Ca Cr Cu Fe H Hg Ir Mg O Pb Pt S Si 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AmphiboleCalciteChalcopyriteClayCopperMalachiteNickelineNonePyriteQuartz
RocksaltSerpentineSpinelTalc

18 IMA Minerals at location:
Actinolite  (*)Antigorite  (*)Calcite  (*)Chalcopyrite  (*)Chromite  (*)
Chrysotile  (*)Galena  (*)Gold  (*)Iridium  (*)Magnetite  (*)
Malachite  (*)Mercury  (*)Platinum  (*)Pyrite  (*)Pyrrhotite  (*)
Quartz  (*)Talc  (*)Tremolite  (*)
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)21631632259836,2598383419
Antigorite  (*)Serpentine ClayMg3Si2O5(OH)41631632259838,259856708
Calcite  (*)CalciteCa(CO3)1631634259856,259859,259878,25990127770
Chalcopyrite  (*)ChalcopyriteCuFeS21631639259842,259847,259854,259856,259863,259886,259888,259901,25990527198
Chromite  (*)SpinelFe2+Cr2O420316336259827,259830,259831,259832,259833,259835,259836,259837,259838,259839,259843,259845,259848,259850,259851,259856,259857,259858,259859,259860,259861,259864,259876,259877,259879,259884,259885,259887,259890,259891,259893,259895,259897,259898,259902,2599043902
Chrysotile  (*)Serpentine ClayMg3Si2O5(OH)42032031259876951
Galena  (*)RocksaltPbS125984724243
Gold  (*)CopperAu16259825,259826,259829,259834,259841,259847,259867,259871,259872,259873,259874,259888,259892,259896,259899,25990830554
Iridium  (*)CopperIr1259826162
Magnetite  (*)SpinelFe2+Fe3+2O43259826,259842,25985414899
Malachite  (*)MalachiteCu2(CO3)(OH)21631633259856,259863,25990512537
Mercury  (*)NoneHg1259892397
Platinum  (*)CopperPt1259892485
Pyrite  (*)PyriteFeS211259829,259847,259853,259854,259862,259868,259874,259886,259900,259901,25990739462
Pyrrhotite  (*)NickelineFe7S85259842,259847,259854,259863,2599059056
Quartz  (*)QuartzSiO25259847,259868,259874,259901,25990761156
Talc  (*)Clay TalcMg3Si4O10(OH)21631636259836,259838,259856,259858,259859,2598603337
Tremolite  (*)Amphibole   Ca2(Mg5.0-4.5Fe2+0.0-0.5)Si8O22(OH)22031632259836,2598762562


16 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
podchrome-00373163163Middle Jurassic (164-162 Ma)     Yes Cr150144Lucky Strike - Castle Springs, Central Illinois River District, Josephine Co., Oregon, USALucky Strike-Castle SpringsMoiser et al. (2012) USGSSIR2012_5157 
podchrome-00427203203Late Triassic-Early Jurassic (>173 and >175 Ma U-Pb zircon in plagiogranite)       Cr147537Big Bear, Illinois River District, Josephine Co., Oregon, USABig BearMoiser et al. (2012) USGSSIR2012_5157 
podchrome-00430203203Late Triassic-Early Jurassic (>173 and >175 Ma U-Pb zircon in plagiogranite)       Cr147544Big Chief Chrome, Illinois River District, Josephine Co., Oregon, USABig ChiefMoiser et al. (2012) USGSSIR2012_5157 
podchrome-00350203203Late Triassic-Early Jurassic (>173 and >175 Ma U-Pb zircon in plagiogranite)       Cr147555Big Four Chromite, Illinois River District, Josephine Co., Oregon, USABig FourMoiser et al. (2012) USGSSIR2012_5157 
podchrome-00374163163Middle Jurassic (164-162 Ma)       Cr147606Black Diamond, Illinois River District, Josephine Co., Oregon, USAButte-Black DiamondMoiser et al. (2012) USGSSIR2012_5157 
podchrome-00362163163Middle Jurassic (164-162 Ma)       Cr147622Black Otter Claim, Illinois River District, Josephine Co., Oregon, USABlack Otter ClaimMoiser et al. (2012) USGSSIR2012_5157 
podchrome-00433163163Middle Jurassic (164-162 Ma)       Cr147780Brown Scratch (Anderson-Fisher Chrome Mine; Center; Red Scratch), Illinois River District, Josephine Co., Oregon, USABrown ScratchMoiser et al. (2012) USGSSIR2012_5157 
podchrome-00349163163Middle Jurassic (164-162 Ma)       Cr148337Crown Mine (Nichols Prospect; Hammer; Upper Hammon No. 38?), Illinois River District, Josephine Co., Oregon, USACrownMoiser et al. (2012) USGSSIR2012_5157 
podchrome-00375163163Middle Jurassic (164-162 Ma)       Cr148482Dark Star, Illinois River District, Josephine Co., Oregon, USADark StarMoiser et al. (2012) USGSSIR2012_5157 
podchrome-00359163163Middle Jurassic (164-162 Ma)       Cr65117Deep Gorge Chromite Claim (Grissom Chrome), Illinois River District, Josephine Co., Oregon, USADeep GorgeMoiser et al. (2012) USGSSIR2012_5157 
podchrome-00372163163Middle Jurassic (164-162 Ma)       Cr148564Dirty Face (Bucheit Handwork & Meyers; Burro; Peach; Happy Jack; Hansen), Illinois River District, Josephine Co., Oregon, USAHansenMoiser et al. (2012) USGSSIR2012_5157 
podchrome-00377163163Middle Jurassic (164-162 Ma)       Cr148672Early Sunrise Claim, Illinois River District, Josephine Co., Oregon, USAEarly Sunrise ClaimMoiser et al. (2012) USGSSIR2012_5157 
podchrome-00431203203Late Triassic-Early Jurassic (>173 and >175 Ma U-Pb zircon in plagiogranite)       Cr65399Griffin Chromite (Mikes Gulch; Nickel Plate), Illinois River District, Josephine Co., Oregon, USAGriffinMoiser et al. (2012) USGSSIR2012_5157 
podchrome-00448203203Late Triassic-Early Jurassic (>173 and >175 Ma U-Pb zircon in plagiogranite)       Cr150349Mighty Joe, Illinois River District, Josephine Co., Oregon, USAMighty JoeMoiser et al. (2012) USGSSIR2012_5157 
podchrome-00366163163Middle Jurassic (164-162 Ma)       Cr65748Oregon Chrome Mines Property (Illinois River Mine; Black Beauty; Robertson Mine), Illinois River District, Josephine Co., Oregon, USAOregon ChromeMoiser et al. (2012) USGSSIR2012_5157 
podchrome-00432163163Middle Jurassic (164-162 Ma)       Cr151203Red Dog Van Gwyn Group, Illinois River District, Josephine Co., Oregon, USARed DogMoiser et al. (2012) USGSSIR2012_5157 

SampleSource LocalityReference URL

All locality data graciously provided by mindat.org

All age data...

Other copyright data...