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:
Steigmeyer Property (Gold Shale Lode Claims), Round Mountain District, Toquima Range, Nye Co., Nevada, USA

Oldest recorded age at locality: 85.5
Youngest recorded age at locality: 16.2

mindat Locality ID: 40274
mindat URL: http://www.mindat.org/loc-40274.html

Tectonic Settings:

Total number of sublocalities beneath "Steigmeyer Property (Gold Shale Lode Claims), Round Mountain District, Toquima Range, Nye Co., Nevada, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 0°0'0"N
Longitude: 0°0'0"E
Decimal Degree (lat, lon): 0,0

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 Fe O S 

Elements from minerals reported directly at this locality: Au C Ca Fe O S 

Structural Groups for minerals in this locality: 
CalciteCopperNonePyrite

3 IMA Minerals at location:
Calcite  (*)Gold  (*)Pyrite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Calcite  (*)CalciteCa(CO3)85.516.2027770
Gold  (*)CopperAu2624.4030554
Pyrite  (*)PyriteFeS285.516.2039462



31 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
Kristen0002222724.825.9±1.1fission track zirconDRS-74-266 YesZircon  261556Toquima Range, Nye Co., Nevada, USAToquima RangeShawe et al. (1986)10.2113/gsecongeo.81.2.388EG81_388 
Kristen00024023.421.422.4±1fission track zirconDRS-80-60 YesZircon  261556Toquima Range, Nye Co., Nevada, USAToquima RangeShawe et al. (1986)10.2113/gsecongeo.81.2.388EG81_388 
Kristen00024124.619.822.2±2.4fission track apatiteDRS-80-60 Yes  261556Toquima Range, Nye Co., Nevada, USAToquima RangeShawe et al. (1986)10.2113/gsecongeo.81.2.388EG81_388 
Kristen00018735.233.434.3±0.9K-Ar sanidineDRS-67-99 YesSanidine  24436Round Mountain District, Toquima Range, Nye Co., Nevada, USARound Mountain DistrictShawe et al. (1986)10.2113/gsecongeo.81.2.388EG81_388 
Kristen00018880.877.679.2±1.6K-Ar muscoviteDRS-67-122 YesMuscovite  24436Round Mountain District, Toquima Range, Nye Co., Nevada, USARound Mountain DistrictShawe et al. (1986)10.2113/gsecongeo.81.2.388EG81_388 
Kristen00019085.580.983.2±2.3K-Ar muscoviteDRS-73-36 YesMuscovite  24436Round Mountain District, Toquima Range, Nye Co., Nevada, USARound Mountain DistrictShawe et al. (1986)10.2113/gsecongeo.81.2.388EG81_388 
Kristen0001918177.479.2±1.8K-Ar muscoviteDRS-73-38 YesMuscovite  24436Round Mountain District, Toquima Range, Nye Co., Nevada, USARound Mountain DistrictShawe et al. (1986)10.2113/gsecongeo.81.2.388EG81_388 
Kristen0001928379.281.1±1.9K-Ar muscoviteDRS-73-45 YesMuscovite  24436Round Mountain District, Toquima Range, Nye Co., Nevada, USARound Mountain DistrictShawe et al. (1986)10.2113/gsecongeo.81.2.388EG81_388 
Kristen00019382.977.380.1±2.8K-Ar biotiteDRS-73-138 Yes  24436Round Mountain District, Toquima Range, Nye Co., Nevada, USARound Mountain DistrictShawe et al. (1986)10.2113/gsecongeo.81.2.388EG81_388 
Kristen00019435.633.234.4±1.2K-Arhydrothermal alterationsanidineDRS-74-94 YesSanidine  24436Round Mountain District, Toquima Range, Nye Co., Nevada, USARound Mountain DistrictShawe et al. (1986)10.2113/gsecongeo.81.2.388EG81_388 
Kristen00019540.939.340.1±0.8K-Arradiogenic argon lossmuscoviteDRS-74-97B YesMuscovite  24436Round Mountain District, Toquima Range, Nye Co., Nevada, USARound Mountain DistrictShawe et al. (1986)10.2113/gsecongeo.81.2.388EG81_388 
Kristen00019662.860.461.6±1.2K-Arradiogenic argon lossmuscoviteDRS-74-102C YesMuscovite  24436Round Mountain District, Toquima Range, Nye Co., Nevada, USARound Mountain DistrictShawe et al. (1986)10.2113/gsecongeo.81.2.388EG81_388 
Kristen00019737.234.836±1.2K-Arhydrothermal alterationbiotiteDRS-74-113 Yes  24436Round Mountain District, Toquima Range, Nye Co., Nevada, USARound Mountain DistrictShawe et al. (1986)10.2113/gsecongeo.81.2.388EG81_388 
Kristen00019835.933.534.7±1.2K-Ar sanidineDRS-74-113 YesSanidine  24436Round Mountain District, Toquima Range, Nye Co., Nevada, USARound Mountain DistrictShawe et al. (1986)10.2113/gsecongeo.81.2.388EG81_388 
Kristen00019936.333.935.1±1.2K-Arhydrothermal alterationbiotiteDRS-74-207 Yes  24436Round Mountain District, Toquima Range, Nye Co., Nevada, USARound Mountain DistrictShawe et al. (1986)10.2113/gsecongeo.81.2.388EG81_388 
Kristen00020037.735.336.5±1.2K-Ar biotiteDRS-74-229 Yes  24436Round Mountain District, Toquima Range, Nye Co., Nevada, USARound Mountain DistrictShawe et al. (1986)10.2113/gsecongeo.81.2.388EG81_388 
Kristen00020182.977.580.2±2.7K-Arage of foliationmuscoviteDRS-74-259 YesMuscovite  24436Round Mountain District, Toquima Range, Nye Co., Nevada, USARound Mountain DistrictShawe et al. (1986)10.2113/gsecongeo.81.2.388EG81_388 
Kristen00020283.778.180.9±2.8K-Arage of foliationbiotiteDRS-74-259 Yes  24436Round Mountain District, Toquima Range, Nye Co., Nevada, USARound Mountain DistrictShawe et al. (1986)10.2113/gsecongeo.81.2.388EG81_388 
Kristen00020379.476.477.9±1.5K-Ar muscoviteDRS-74-260B YesMuscovite  24436Round Mountain District, Toquima Range, Nye Co., Nevada, USARound Mountain DistrictShawe et al. (1986)10.2113/gsecongeo.81.2.388EG81_388 
Kristen00020525.824.225±0.8K-Ar biotiteDRS-76-54 Yes  24436Round Mountain District, Toquima Range, Nye Co., Nevada, USARound Mountain DistrictShawe et al. (1986)10.2113/gsecongeo.81.2.388EG81_388 
Kristen00022030.123.126.6±3.5fission track apatiteDRS-68-102 Yes  24436Round Mountain District, Toquima Range, Nye Co., Nevada, USARound Mountain DistrictShawe et al. (1986)10.2113/gsecongeo.81.2.388EG81_388 
Kristen0002213834.636.3±1.7fission trackhydrothermal alterationzirconDRS-74-89A YesZircon  24436Round Mountain District, Toquima Range, Nye Co., Nevada, USARound Mountain DistrictShawe et al. (1986)10.2113/gsecongeo.81.2.388EG81_388 
Kristen00023137.734.536.1±1.6fission trackformation agezirconDRS-79-20 YesZircon  24436Round Mountain District, Toquima Range, Nye Co., Nevada, USARound Mountain DistrictShawe et al. (1986)10.2113/gsecongeo.81.2.388EG81_388 
Kristen00023239.735.137.4±2.3fission trackformation agezirconDRS-79-20 YesZircon  24436Round Mountain District, Toquima Range, Nye Co., Nevada, USARound Mountain DistrictShawe et al. (1986)10.2113/gsecongeo.81.2.388EG81_388 
Kristen00023338.234.236.2±2fission trackformation agespheneDRS-79-20 Yes  24436Round Mountain District, Toquima Range, Nye Co., Nevada, USARound Mountain DistrictShawe et al. (1986)10.2113/gsecongeo.81.2.388EG81_388 
Kristen00023420.416.218.3±2.1fission trackformation ageapatiteDRS-79-20 Yes  24436Round Mountain District, Toquima Range, Nye Co., Nevada, USARound Mountain DistrictShawe et al. (1986)10.2113/gsecongeo.81.2.388EG81_388 
Kristen00023746.742.144.4±2.3fission track zirconDRS-80-38C YesZircon  24436Round Mountain District, Toquima Range, Nye Co., Nevada, USARound Mountain DistrictShawe et al. (1986)10.2113/gsecongeo.81.2.388EG81_388 
Kristen00023845.539.942.7±2.8fission track zirconDRS-80-38C YesZircon  24436Round Mountain District, Toquima Range, Nye Co., Nevada, USARound Mountain DistrictShawe et al. (1986)10.2113/gsecongeo.81.2.388EG81_388 
Kristen00023921.717.719.7±2fission track apatiteDRS-80-38C Yes  24436Round Mountain District, Toquima Range, Nye Co., Nevada, USARound Mountain DistrictShawe et al. (1986)10.2113/gsecongeo.81.2.388EG81_388 
Kristen0013802624.425.2±0.8K-Armineralization agehighadulariaDRS-68-146 Yes Au239003Round Mountain, Round Mountain District, Toquima Range, Nye Co., Nevada, USARound MountainShawe et al. (1986)10.2113/gsecongeo.81.2.388EG81_388 
AJES44_373-00015262626     Yes Au11587Round Mountain Mine (Round Mountain Gold Mine; Sunnyside Mine; Sphinx Glory Hole; Great Western Tunnel; Rattlesnake; Keane Vein; Los Gazabo Vein), Round Mountain, Round Mountain, Round Mountain District, Toquima Range, Nye Co., Nevada, USARound MountainSillitoe (1997)10.1080/08120099708728318AJES44_373 


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