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:
Roberts District, Eureka Co., Nevada, USA

Oldest recorded age at locality: 36.3
Youngest recorded age at locality: 29.7

mindat Locality ID: 36781
mindat URL: http://www.mindat.org/loc-36781.html

Tectonic Settings:

Total number of sublocalities beneath "Roberts District, Eureka Co., Nevada, USA": 2
Total number of bottom-level sublocalities: 2

Number of Child Localities: 2
Child Localities:
Keystone Mine
Kingston Mine

Latitude: 39°55'24"N
Longitude: 116°33'4"W
Decimal Degree (lat, lon): 39.923333333333,-116.55111111111

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.

Allophane	Chalcopyrite	Clinozoisite	Epidote	Malachite	Nickeline	None	Not in a structural group	Pyrite	Rocksalt
Scheelite	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: Al C Ca Cu Fe H Mo O Pb S Si Zn

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Allophane Chalcopyrite Clinozoisite Epidote Malachite Nickeline None Not in a structural group Pyrite Rocksalt
Scheelite Sphalerite

11 IMA Minerals at location:

Chalcopyrite ()*	Chrysocolla ()*	Cuprite ()*	Dioptase ()*	Epidote ()*
Galena ()*	Malachite ()*	Pyrite ()*	Pyrrhotite ()*	Sphalerite ()*
Wulfenite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	36.3	29.7	2	237202,237203	27198
Chrysocolla ()*	Allophane	(Cu_2-xAl_x)H_2-xSi₂O₅(OH)₄·nH₂O	36.3	29.7	2	237202,237203	3531
Cuprite ()*	Not in a structural group	Cu₂O	36.3	29.7	2	237202,237203	2970
Dioptase ()*	None	CuSiO₃·H₂O	36.3	29.7	1	237202	164
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	36.3	29.7	1	237202	8173
Galena ()*	Rocksalt	PbS	36.3	29.7	2	237202,237203	24243
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	36.3	29.7	1	237202	12537
Pyrite ()*	Pyrite	FeS₂	36.3	29.7	1	237202	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈	36.3	29.7	1	237202	9056
Sphalerite ()*	Sphalerite	ZnS	36.3	29.7	1	237202	21482
Wulfenite ()*	Scheelite	PbMoO₄	36.3	29.7	1	237202	1655

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
	NAVDAT-117327	36.3	29.7	33±3.3					117327						60671	Keystone Mine, Roberts District, Eureka Co., Nevada, USA		NAVDAT		NAVDAT
	NAVDAT-9747	36.3	29.7	33±3.3					9747						60671	Keystone Mine, Roberts District, Eureka Co., Nevada, USA		NAVDAT		NAVDAT

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...