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:
Brown's Gulch, Red Mountain District, San Juan Co., Colorado, USA

Oldest recorded age at locality: 380
Youngest recorded age at locality: 20

mindat Locality ID: 233721
mindat URL: http://www.mindat.org/loc-233721.html

Tectonic Settings:

Total number of sublocalities beneath "Brown's Gulch, Red Mountain District, San Juan Co., Colorado, USA": 2
Total number of bottom-level sublocalities: 2

Number of Child Localities: 2
Child Localities:
Brooklyn Mine
Growler Mine

Latitude: 37°51'38"N
Longitude: 107°42'52"W
Decimal Degree (lat, lon): 37.860555555556,-107.71444444444
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 Bi C Ca Cu F Fe H Hg K Mn Ni O P Pb S Si Te Zn 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AcanthiteApatiteCalciteChalcopyriteClayCopperKaoliniteMicaNonePyrite
PyrophylliteQuartzRocksaltSphaleriteTetradymite

19 IMA Minerals at location:
Acanthite  (*)Altaite  (*)Chalcopyrite  (*)Coloradoite  (*)Cosalite  (*)
Fluorapatite  (*)Galena  (*)Gold  (*)Kaolinite  (*)Mercury  (*)
Muscovite  (*)Gersdorffite-Pa3  (*)Petzite  (*)Pyrite  (*)Pyrophyllite  (*)
Quartz  (*)Rhodochrosite  (*)Sphalerite  (*)Tetradymite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Acanthite  (*)AcanthiteAg2S262011965242793
Altaite  (*)RocksaltPbTe26201196524489
Chalcopyrite  (*)ChalcopyriteCuFeS22620119652427198
Coloradoite  (*)SphaleriteHgTe26201196524169
Cosalite  (*)NonePb2Bi2S526201196524344
Fluorapatite  (*)ApatiteCa5(PO4)3F262011965242740
Galena  (*)RocksaltPbS2620119652424243
Gold  (*)CopperAu2620119652430554
Kaolinite  (*)Clay KaoliniteAl2Si2O5(OH)4262011965245591
Mercury  (*)NoneHg26201196524397
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)22620119652417380
Gersdorffite-Pa3  (*)PyriteNiAsS26201196524767
Petzite  (*)NoneAg3AuTe226201196524409
Pyrite  (*)PyriteFeS226202196524,19652539462
Pyrophyllite  (*)Clay PyrophylliteAl2Si4O10(OH)226201196524771
Quartz  (*)QuartzSiO22620119652461156
Rhodochrosite  (*)CalciteMn(CO3)262011965241711
Sphalerite  (*)SphaleriteZnS26202196524,19652521482
Tetradymite  (*)TetradymiteBi2Te2S26201196524510


3 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
Giersdorf_00000596242022±2238U-206U uraniniteK-172 YesUraniniteUraniniteU4142Happy Jack Mine (Blue Dike Mine), White Canyon, White Canyon District, San Juan Co., Utah, USAHappy Jack MineMiller et al. (1963)10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2GSAB74_609Age given for U238-Pb206 analysis
Giersdorf_00000597262224±2235U-207Pb uraniniteK-172 YesUraniniteUraniniteU4142Happy Jack Mine (Blue Dike Mine), White Canyon, White Canyon District, San Juan Co., Utah, USAHappy Jack MineMiller et al. (1963)10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2GSAB74_609Age given for U235-Pb207 analysis
Giersdorf_00000598380280330±50207Pb-206PbThe Pb207-Pb206 age given for these samples is described as being highly erroneous due to the systematic sensitivity of the analytic methodslowuraniniteK-172 YesUraniniteUraniniteU4142Happy Jack Mine (Blue Dike Mine), White Canyon, White Canyon District, San Juan Co., Utah, USAHappy Jack MineMiller et al. (1963)10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2GSAB74_609Age given for Pb207-Pb206 analysis

SampleSource LocalityReference URL

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