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

A	This mineral is Anthropogenic.
G	This mineral is directly dated.
B	This mineral is reported as having this age.
Y	This mineral is using an age reported as an element mineralization period.
O	This mineral is using an age calculated from all data at the locality.
R	The age displayed for this mineral originates from a different, non-child locality.
P	The 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.

Calcite	Copper	None	Pyrite

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:
Calcite Copper None Pyrite

3 IMA Minerals at location:

Calcite ()*	Gold ()*	Pyrite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Calcite ()*	Calcite	Ca(CO₃)	85.5	16.2	27770
Gold ()*	Copper	Au	26	24.4	30554
Pyrite ()*	Pyrite	FeS₂	85.5	16.2	39462

31 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Prioritized?	Sample Source	Sample Num	Age from other Locality	Dated Mineral	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID
Kristen000222	27	24.8	25.9±1.1	fission track			zircon	DRS-74-266	Yes	Zircon		261556	Toquima Range, Nye Co., Nevada, USA	Toquima Range	Shawe et al. (1986)	10.2113/gsecongeo.81.2.388	EG81_388
Kristen000240	23.4	21.4	22.4±1	fission track			zircon	DRS-80-60	Yes	Zircon		261556	Toquima Range, Nye Co., Nevada, USA	Toquima Range	Shawe et al. (1986)	10.2113/gsecongeo.81.2.388	EG81_388
Kristen000241	24.6	19.8	22.2±2.4	fission track			apatite	DRS-80-60	Yes			261556	Toquima Range, Nye Co., Nevada, USA	Toquima Range	Shawe et al. (1986)	10.2113/gsecongeo.81.2.388	EG81_388
Kristen000187	35.2	33.4	34.3±0.9	K-Ar			sanidine	DRS-67-99	Yes	Sanidine		24436	Round Mountain District, Toquima Range, Nye Co., Nevada, USA	Round Mountain District	Shawe et al. (1986)	10.2113/gsecongeo.81.2.388	EG81_388
Kristen000188	80.8	77.6	79.2±1.6	K-Ar			muscovite	DRS-67-122	Yes	Muscovite		24436	Round Mountain District, Toquima Range, Nye Co., Nevada, USA	Round Mountain District	Shawe et al. (1986)	10.2113/gsecongeo.81.2.388	EG81_388
Kristen000190	85.5	80.9	83.2±2.3	K-Ar			muscovite	DRS-73-36	Yes	Muscovite		24436	Round Mountain District, Toquima Range, Nye Co., Nevada, USA	Round Mountain District	Shawe et al. (1986)	10.2113/gsecongeo.81.2.388	EG81_388
Kristen000191	81	77.4	79.2±1.8	K-Ar			muscovite	DRS-73-38	Yes	Muscovite		24436	Round Mountain District, Toquima Range, Nye Co., Nevada, USA	Round Mountain District	Shawe et al. (1986)	10.2113/gsecongeo.81.2.388	EG81_388
Kristen000192	83	79.2	81.1±1.9	K-Ar			muscovite	DRS-73-45	Yes	Muscovite		24436	Round Mountain District, Toquima Range, Nye Co., Nevada, USA	Round Mountain District	Shawe et al. (1986)	10.2113/gsecongeo.81.2.388	EG81_388
Kristen000193	82.9	77.3	80.1±2.8	K-Ar			biotite	DRS-73-138	Yes			24436	Round Mountain District, Toquima Range, Nye Co., Nevada, USA	Round Mountain District	Shawe et al. (1986)	10.2113/gsecongeo.81.2.388	EG81_388
Kristen000194	35.6	33.2	34.4±1.2	K-Ar	hydrothermal alteration		sanidine	DRS-74-94	Yes	Sanidine		24436	Round Mountain District, Toquima Range, Nye Co., Nevada, USA	Round Mountain District	Shawe et al. (1986)	10.2113/gsecongeo.81.2.388	EG81_388
Kristen000195	40.9	39.3	40.1±0.8	K-Ar	radiogenic argon loss		muscovite	DRS-74-97B	Yes	Muscovite		24436	Round Mountain District, Toquima Range, Nye Co., Nevada, USA	Round Mountain District	Shawe et al. (1986)	10.2113/gsecongeo.81.2.388	EG81_388
Kristen000196	62.8	60.4	61.6±1.2	K-Ar	radiogenic argon loss		muscovite	DRS-74-102C	Yes	Muscovite		24436	Round Mountain District, Toquima Range, Nye Co., Nevada, USA	Round Mountain District	Shawe et al. (1986)	10.2113/gsecongeo.81.2.388	EG81_388
Kristen000197	37.2	34.8	36±1.2	K-Ar	hydrothermal alteration		biotite	DRS-74-113	Yes			24436	Round Mountain District, Toquima Range, Nye Co., Nevada, USA	Round Mountain District	Shawe et al. (1986)	10.2113/gsecongeo.81.2.388	EG81_388
Kristen000198	35.9	33.5	34.7±1.2	K-Ar			sanidine	DRS-74-113	Yes	Sanidine		24436	Round Mountain District, Toquima Range, Nye Co., Nevada, USA	Round Mountain District	Shawe et al. (1986)	10.2113/gsecongeo.81.2.388	EG81_388
Kristen000199	36.3	33.9	35.1±1.2	K-Ar	hydrothermal alteration		biotite	DRS-74-207	Yes			24436	Round Mountain District, Toquima Range, Nye Co., Nevada, USA	Round Mountain District	Shawe et al. (1986)	10.2113/gsecongeo.81.2.388	EG81_388
Kristen000200	37.7	35.3	36.5±1.2	K-Ar			biotite	DRS-74-229	Yes			24436	Round Mountain District, Toquima Range, Nye Co., Nevada, USA	Round Mountain District	Shawe et al. (1986)	10.2113/gsecongeo.81.2.388	EG81_388
Kristen000201	82.9	77.5	80.2±2.7	K-Ar	age of foliation		muscovite	DRS-74-259	Yes	Muscovite		24436	Round Mountain District, Toquima Range, Nye Co., Nevada, USA	Round Mountain District	Shawe et al. (1986)	10.2113/gsecongeo.81.2.388	EG81_388
Kristen000202	83.7	78.1	80.9±2.8	K-Ar	age of foliation		biotite	DRS-74-259	Yes			24436	Round Mountain District, Toquima Range, Nye Co., Nevada, USA	Round Mountain District	Shawe et al. (1986)	10.2113/gsecongeo.81.2.388	EG81_388
Kristen000203	79.4	76.4	77.9±1.5	K-Ar			muscovite	DRS-74-260B	Yes	Muscovite		24436	Round Mountain District, Toquima Range, Nye Co., Nevada, USA	Round Mountain District	Shawe et al. (1986)	10.2113/gsecongeo.81.2.388	EG81_388
Kristen000205	25.8	24.2	25±0.8	K-Ar			biotite	DRS-76-54	Yes			24436	Round Mountain District, Toquima Range, Nye Co., Nevada, USA	Round Mountain District	Shawe et al. (1986)	10.2113/gsecongeo.81.2.388	EG81_388
Kristen000220	30.1	23.1	26.6±3.5	fission track			apatite	DRS-68-102	Yes			24436	Round Mountain District, Toquima Range, Nye Co., Nevada, USA	Round Mountain District	Shawe et al. (1986)	10.2113/gsecongeo.81.2.388	EG81_388
Kristen000221	38	34.6	36.3±1.7	fission track	hydrothermal alteration		zircon	DRS-74-89A	Yes	Zircon		24436	Round Mountain District, Toquima Range, Nye Co., Nevada, USA	Round Mountain District	Shawe et al. (1986)	10.2113/gsecongeo.81.2.388	EG81_388
Kristen000231	37.7	34.5	36.1±1.6	fission track	formation age		zircon	DRS-79-20	Yes	Zircon		24436	Round Mountain District, Toquima Range, Nye Co., Nevada, USA	Round Mountain District	Shawe et al. (1986)	10.2113/gsecongeo.81.2.388	EG81_388
Kristen000232	39.7	35.1	37.4±2.3	fission track	formation age		zircon	DRS-79-20	Yes	Zircon		24436	Round Mountain District, Toquima Range, Nye Co., Nevada, USA	Round Mountain District	Shawe et al. (1986)	10.2113/gsecongeo.81.2.388	EG81_388
Kristen000233	38.2	34.2	36.2±2	fission track	formation age		sphene	DRS-79-20	Yes			24436	Round Mountain District, Toquima Range, Nye Co., Nevada, USA	Round Mountain District	Shawe et al. (1986)	10.2113/gsecongeo.81.2.388	EG81_388
Kristen000234	20.4	16.2	18.3±2.1	fission track	formation age		apatite	DRS-79-20	Yes			24436	Round Mountain District, Toquima Range, Nye Co., Nevada, USA	Round Mountain District	Shawe et al. (1986)	10.2113/gsecongeo.81.2.388	EG81_388
Kristen000237	46.7	42.1	44.4±2.3	fission track			zircon	DRS-80-38C	Yes	Zircon		24436	Round Mountain District, Toquima Range, Nye Co., Nevada, USA	Round Mountain District	Shawe et al. (1986)	10.2113/gsecongeo.81.2.388	EG81_388
Kristen000238	45.5	39.9	42.7±2.8	fission track			zircon	DRS-80-38C	Yes	Zircon		24436	Round Mountain District, Toquima Range, Nye Co., Nevada, USA	Round Mountain District	Shawe et al. (1986)	10.2113/gsecongeo.81.2.388	EG81_388
Kristen000239	21.7	17.7	19.7±2	fission track			apatite	DRS-80-38C	Yes			24436	Round Mountain District, Toquima Range, Nye Co., Nevada, USA	Round Mountain District	Shawe et al. (1986)	10.2113/gsecongeo.81.2.388	EG81_388
Kristen001380	26	24.4	25.2±0.8	K-Ar	mineralization age	high	adularia	DRS-68-146	Yes		Au	239003	Round Mountain, Round Mountain District, Toquima Range, Nye Co., Nevada, USA	Round Mountain	Shawe et al. (1986)	10.2113/gsecongeo.81.2.388	EG81_388
AJES44_373-00015	26	26	26						Yes		Au	11587	Round 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, USA	Round Mountain	Sillitoe (1997)	10.1080/08120099708728318	AJES44_373

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...