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:
Rampart District, Yukon-Koyukuk Census Area, Alaska, USA


mindat Locality ID: 203167
mindat URL: http://www.mindat.org/loc-203167.html

Tectonic Settings:

Total number of sublocalities beneath "Rampart District, Yukon-Koyukuk Census Area, Alaska, USA": 32
Total number of bottom-level sublocalities: 32

Number of Child Localities: 32
Child Localities:
Alabam Creek Prospect
Aloha Prospect
Avnet; Buzby Prospect
Baldry Mountain Prospect
Butte Creek Mine
Chapman Creek Mine
Dawson Creek Mine
Elephant Mountain Prospects
Florida Creek Mine
Gunnison Creek Mine
Hoosier Creek Mine
Hunter Creek Mine (ARDF - LG185)
Hunter Creek Mine (ARDF - TN062)
Idaho Bar Mine
Joseph Creek Prospect
Little Minook Creek Mine
Little Minook Jr. Creek Mine
Minook Creek Mine
Quail Creek Mine
Quail Creek Mine (between Green Gulch And Eldorado Creek)
Ruby Creek Mine
Troublesome Creek Mine
Unnamed Occurrence (ARDF - TN044; Near Garnet Creek)
Unnamed Occurrence (ARDF - TN045; Sixmile Creek Headwaters)
Unnamed Occurrence (ARDF - TN047; Northwest Baldry Mountain)
Unnamed Occurrence (ARDF - TN049; North Of Granite Creek)
Unnamed Occurrence (ARDF - TN055; Rampart Road; Lower Minook Creek)
Unnamed Occurrence (ARDF - TN069; Upper Little Minook Creek)
Unnamed Occurrence (ARDF - TN070; Near Chapman Creek)
Unnamed Occurrences (ARDF - TN057; Miller Gulch; Mynook Creek)
Willow Creek Mine
Wolverine Mountain Occurrence

Latitude: 65°24'24"N
Longitude: 149°54'33"W
Decimal Degree (lat, lon): 65.406666666667,-149.90916666667

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 As Au Ba Bi C Ca Cr Cu Fe H Hg Mn Mo O Pb S Sb Si Sn Te Ti W 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
ArsenicArsenopyriteBaryteCalciteChalcopyriteCopperCorundumMalachiteMolybdeniteNone
PyriteQuartzRocksaltRutileScheeliteSpinelStibniteSulphurTetradymite

25 IMA Minerals at location:
Arsenopyrite  (*)Baryte  (*)Bismuth  (*)Calcite  (*)Cassiterite  (*)
Chalcopyrite  (*)Chromite  (*)Cinnabar  (*)Copper  (*)Galena  (*)
Gold  (*)Hematite  (*)Ilmenite  (*)Magnetite  (*)Malachite  (*)
Molybdenite  (*)Pyrite  (*)Pyrolusite  (*)Quartz  (*)Scheelite  (*)
Siderite  (*)Silver  (*)Stibnite  (*)Sulphur  (*)Tetradymite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Arsenopyrite  (*)ArsenopyriteFeAsS11359739052
Baryte  (*)BaryteBa(SO4)3135976,135981,13598211547
Bismuth  (*)ArsenicBi2135973,1359861966
Calcite  (*)CalciteCa(CO3)113599527770
Cassiterite  (*)RutileSnO24135977,135978,135984,1359875171
Chalcopyrite  (*)ChalcopyriteCuFeS22135981,13599527198
Chromite  (*)SpinelFe2+Cr2O411359813902
Cinnabar  (*)NoneHgS5135976,135977,135978,135984,1359872600
Copper  (*)CopperCu6135972,135976,135977,135978,135981,1359863846
Galena  (*)RocksaltPbS7135976,135977,135978,135981,135982,135986,13598724243
Gold  (*)CopperAu16135971,135972,135973,135974,135975,135976,135977,135978,135979,135981,135982,135983,135984,135986,135987,13599630554
Hematite  (*)CorundumFe2O33135976,135981,13598214640
Ilmenite  (*)CorundumFe2+Ti4+O33135976,135981,1359825433
Magnetite  (*)SpinelFe2+Fe3+2O43135976,135981,13598214899
Malachite  (*)MalachiteCu2(CO3)(OH)22135989,13599212537
Molybdenite  (*)MolybdeniteMoS211359735800
Pyrite  (*)PyriteFeS26135976,135978,135981,135982,135992,13599539462
Pyrolusite  (*)RutileMnO211359683106
Quartz  (*)QuartzSiO25135968,135973,135989,135990,13599561156
Scheelite  (*)ScheeliteCa(WO4)4135975,135976,135981,1359844894
Siderite  (*)CalciteFe(CO3)11359956417
Silver  (*)CopperAg4135978,135981,135983,1359865186
Stibnite  (*)StibniteSb2S34135973,135980,135994,1359973418
Sulphur  (*)SulphurS11359812045
Tetradymite  (*)TetradymiteBi2Te2S1135981510



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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