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:
Greenback District (Upper Grave Creek District), Josephine Co., Oregon, USA

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

mindat Locality ID: 50178
mindat URL: http://www.mindat.org/loc-50178.html

Tectonic Settings:

Total number of sublocalities beneath "Greenback District (Upper Grave Creek District), Josephine Co., Oregon, USA": 66
Total number of bottom-level sublocalities: 65

Number of Child Localities: 65
Child Localities:
Big Slide Lode Occurrence
Black Chrome Occurrence (Pine Ridge)
Black Rabbit & Ridge Chrome Occurrence
Chromic Oxide Mine
Columbia Placer (Greenback Consolidated Placer)
Coyote Mine
Dewey Mine
Dorothy Chrome (Ackley Chrome)
Eastman No. 1 Occurrence
Fandora Mine
Florene Mine (Florence)
Gilliam Placer (Buckhorn Mining Company)
Glory Hole Placer
Gold Cup Placer
Gold Note Prospect
Golden Glow
Golden Ring Mine
Grave Creek Placer (Rogue River Gold Company Dredge)
Greenback Chrome Occurrence
Greenback Consolidated Mines
Greenback Mine
Harold Chrome Occurrence
Horseshoe Lode
Jackie Occurrence
Jackpot Mine
Jacks Creek Placer
Jantzer Occurrence
Jim Blaine Mine
Lazy Daze Mine
Lazy Man Occurrence
Leland Sbk Bar Prospect
Mammouth Chrome Mine
Martha Mine/Property (Part Of Greenback Group)
Maynard - French Occurrence (Boulder Iron)
Meathead Occurrence
Moore Chromite (Commander Mine; Mammoth Claim)
Morning Mine
Mountain Treasure Mining Company Occurrence
Northern California Dredging Company
Old Crow Occurrence
Old Smokey Occurrence
Oro Grande Prospect
Pegi Occurrence
Quarry (MRDS - 10032319)
Rainbow Prospect
Red Jacket Mine (Oregon Gold Mines)
Red Jacket Placer
Scholey Gulch Occurrence
Shot Mine (Dutch Girl)
Sluter Mine (Hardscrabble; Gilbert Eri)
Spotted Fawn (Livingstone; Cougar)
St. Paul Copper Occurrence (Eastman No. 1)
Sulfide Occurrence (MRDS - 10032312)
Sunset Mine
Thompson Group (Fitzpatrick; J. E. Fitzpatrick)
Twelve O'Clock Mine
Unnamed Gold Prospect (MRDS - 10128547)
Unnamed Gold Prospect (MRDS - 10298183)
Unnamed Gold Prospect (MRDS - 10298396)
White Wonder Prospect (Red Mountain Silica)
Wolf Creek Logging And Mining Company (Egger; Egger Placer Mine; Logging & Mining Property)
Wolf Creek Placers (Aman Ranch; Blue Channel; Forsythe; Layman; White Star; Buckhorn; Paynes; Paynesjason; Egger)
Yellowhorn Mine (Jim Blaine Group)
Young Prospect
Zig-Zag Prospect

Latitude: 42°39'46"N
Longitude: 123°17'32"W
Decimal Degree (lat, lon): 42.662777777778,-123.29222222222
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 Au C Ca Cr Cu Fe H Mg Mn O Pb Pt S Si Zr 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AllophaneArsenopyriteCalciteChalcopyriteClayCopperMalachiteNickelineNonePyrite
QuartzRocksaltSpinelTalcZircon

18 IMA Minerals at location:
Arsenopyrite  (*)Bornite  (*)Calcite  (*)Chalcopyrite  (*)Chromite  (*)
Chrysocolla  (*)Galena  (*)Gold  (*)Magnetite  (*)Malachite  (*)
Platinum  (*)Pyrite  (*)Pyrrhotite  (*)Quartz  (*)Rhodochrosite  (*)
Silver  (*)Talc  (*)Zircon  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Arsenopyrite  (*)ArsenopyriteFeAsS2259751,2597529052
Bornite  (*)NoneCu5FeS412597775516
Calcite  (*)CalciteCa(CO3)3259750,259751,25979427770
Chalcopyrite  (*)ChalcopyriteCuFeS29259736,259751,259754,259766,259777,259782,259783,259794,25979627198
Chromite  (*)SpinelFe2+Cr2O412259732,259733,259739,259749,259755,259758,259767,259772,259774,259776,259779,2597863902
Chrysocolla  (*)Allophane(Cu2-xAlx)H2-xSi2O5(OH)4·nH2O12597773531
Galena  (*)RocksaltPbS4259750,259777,259780,25979424243
Gold  (*)CopperAu18259735,259740,259741,259748,259750,259751,259754,259756,259761,259769,259777,259780,259781,259782,259785,259787,259793,25979430554
Magnetite  (*)SpinelFe2+Fe3+2O4125976514899
Malachite  (*)MalachiteCu2(CO3)(OH)2125977712537
Platinum  (*)CopperPt1259750485
Pyrite  (*)PyriteFeS211259750,259751,259752,259754,259766,259777,259780,259782,259783,259794,25979639462
Pyrrhotite  (*)NickelineFe7S82259777,2597949056
Quartz  (*)QuartzSiO29259740,259750,259751,259766,259777,259781,259787,259794,25979661156
Rhodochrosite  (*)CalciteMn(CO3)12597541711
Silver  (*)CopperAg2259751,2597545186
Talc  (*)Clay TalcMg3Si4O10(OH)212597963337
Zircon  (*)ZirconZr(SiO4)12597505251


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
podchrome-00429163163Middle Jurassic (164-162 Ma)       Cr148599Dorothy Chrome (Ackley Chrome), Greenback District (Upper Grave Creek District), Josephine Co., Oregon, USADorothy ChromeMoiser et al. (2012) USGSSIR2012_5157 

SampleSource LocalityReference URL

All locality data graciously provided by mindat.org

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