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:
Howardsville, Animas District, San Juan Co., Colorado, USA

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

mindat Locality ID: 3680
mindat URL: http://www.mindat.org/loc-3680.html

Tectonic Settings:

Total number of sublocalities beneath "Howardsville, Animas District, San Juan Co., Colorado, USA": 14
Total number of bottom-level sublocalities: 11

Number of Child Localities: 4
Child Localities:
Canby Mountain
Galena Mountain
King Solomon Mountain
Maggie Gulch Occurrence

Latitude: 37°49'16"N
Longitude: 107°33'53"W
Decimal Degree (lat, lon): 37.821111111111,-107.56472222222

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 Cl Cu F Fe H K Mn O Pb S Sb Si W Zn 

Elements from minerals reported directly at this locality: Al C Ca Cl F Fe H Mn O Pb S Sb Si 

Structural Groups for minerals in this locality: 
AcanthiteAragoniteCalciteChalcopyriteClayColumbiteCopperCorundumFluoriteMica
NonePyriteQuartzRhodoniteRocksaltSphaleriteStibniteTetrahedrite

23 IMA Minerals at location:
Acanthite  (*)Bismuthinite  (*)Boulangerite  (*)Calcite  (*)Cerussite  (*)
Chalcopyrite  (*)Fluorite  (*)Freibergite  (*)Galena  (*)Gold  (*)
Hematite  (*)Hübnerite  (*)Muscovite  (*)Proustite  (*)Pyrite  (*)
Quartz  (*)Rhodochrosite  (*)Rhodonite  (*)Siderite  (*)Silver  (*)
Sphalerite  (*)Tetrahedrite-(Zn)  (*)Zunyite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Acanthite  (*)AcanthiteAg2S262011960912793
Bismuthinite  (*)StibniteBi2S3262011960881935
Boulangerite  (*)NonePb5Sb4S1126200843
Calcite  (*)CalciteCa(CO3)2620119609127770
Cerussite  (*)AragonitePb(CO3)262011960854979
Chalcopyrite  (*)ChalcopyriteCuFeS226203196085,196094,19609627198
Fluorite  (*)FluoriteCaF2262011960929617
Freibergite  (*)TetrahedriteAg6[Cu4Fe2]Sb4S1226202196094,196095663
Galena  (*)RocksaltPbS26205196085,196091,196094,196095,19609624243
Gold  (*)CopperAu2620119609530554
Hematite  (*)CorundumFe2O32620119608814640
Hübnerite  (*)ColumbiteMn2+(WO4)26201196092469
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)226202196091,19609217380
Proustite  (*)NoneAg3AsS326201196091733
Pyrite  (*)PyriteFeS226204196085,196092,196094,19609639462
Quartz  (*)QuartzSiO226206196088,196091,196092,196094,196095,19609761156
Rhodochrosite  (*)CalciteMn(CO3)262001711
Rhodonite  (*)RhodoniteCaMn3Mn(Si5O15)26200969
Siderite  (*)CalciteFe(CO3)262006417
Silver  (*)CopperAg262011960855186
Sphalerite  (*)SphaleriteZnS26202196085,19609621482
Tetrahedrite-(Zn)  (*)TetrahedriteCu6(Cu4Zn2)Sb4S13262011960855317
Zunyite  (*)NoneAl13Si5O20(OH,F)18Cl2620086



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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