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:
Ophir Mine, Comstock Lode, Virginia City, Comstock District, Storey Co., Nevada, USA

Oldest recorded age at locality: 14.1
Youngest recorded age at locality: 13.1

mindat Locality ID: 17291
mindat URL: http://www.mindat.org/loc-17291.html

Tectonic Settings:

Total number of sublocalities beneath "Ophir Mine, Comstock Lode, Virginia City, Comstock District, Storey Co., Nevada, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 39°18'0"N
Longitude: 119°39'"W
Decimal Degree (lat, lon): 39.3,-119.65

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.

Acanthite	Arsenic	Arsenolite	Chalcopyrite	Copper	None	Polybasite	Pyrite	Quartz	Rocksalt
Sphalerite

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 Cu Fe O Pb S Sb Si Zn

Elements from minerals reported directly at this locality: Ag As Au Cu Fe O Pb S Sb Si Zn

Structural Groups for minerals in this locality:
Acanthite Arsenic Arsenolite Chalcopyrite Copper None Polybasite Pyrite Quartz Rocksalt
Sphalerite

12 IMA Minerals at location:

Acanthite ()*	Arsenic ()*	Arsenolite ()*	Chalcopyrite ()*	Galena ()*
Gold ()*	Miargyrite ()*	Pearceite ()*	Pyrite ()*	Quartz ()*
Sphalerite ()*	Stibarsen ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Acanthite ()*	Acanthite	Ag₂S	14.1	13.1	2793
Arsenic ()*	Arsenic	As	14.1	13.1	379
Arsenolite ()*	Arsenolite	As₂O₃	14.1	13.1	231
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	14.1	13.1	27198
Galena ()*	Rocksalt	PbS	14.1	13.1	24243
Gold ()*	Copper	Au	13.7	13.7	30554
Miargyrite ()*	None	AgSbS₂	14.1	13.1	300
Pearceite ()*	Polybasite	[Ag₉CuS₄][(Ag,Cu)₆(As,Sb)₂S₇]	14.1	13.1	249
Pyrite ()*	Pyrite	FeS₂	14.1	13.1	39462
Quartz ()*	Quartz	SiO₂	14.1	13.1	61156
Sphalerite ()*	Sphalerite	ZnS	14.1	13.1	21482
Stibarsen ()*	Arsenic	SbAs	14.1	13.1	48

2 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	Run Num	Age from other Locality	Dated Mineral	Minerals explicitely stated as having this age	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID	Age Notes
	AJES44_373-00013	13.7	13.7	13.7							Yes			Au	23962	Comstock Lode, Virginia City, Comstock District, Storey Co., Nevada, USA	Comstock Lode	Sillitoe (1997)	10.1080/08120099708728318	AJES44_373
	Hg-00096	14.1	13.1		K-Ar						Yes		Kolymite, Moschellandsbergite	Hg	23962	Comstock Lode, Virginia City, Comstock District, Storey Co., Nevada, USA		Vikre et al. (1988)	10.2113/gsecongeo.83.4.864	EG83_864

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...