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:
Empire Star Group (Empire Star Mines Company Holdings), Grass Valley, Grass Valley District, Nevada Co., California, USA

mindat Locality ID: 84077
mindat URL: http://www.mindat.org/loc-84077.html

Tectonic Settings:

Total number of sublocalities beneath "Empire Star Group (Empire Star Mines Company Holdings), Grass Valley, Grass Valley District, Nevada Co., California, USA": 40
Total number of bottom-level sublocalities: 33

Number of Child Localities: 16
Child Localities:
Badger Hill Quartz Mine (Badger; Badger Hill Qtz.)
Crown Point Consolidated Quartz Mine (Crown Point Mine; Crown Point Con. Qtz.; Confidence; Wm Penn; William Penn)
Daisy Hill Mine
Dakota Quartz Mine (Dakota Mine; Dakota Qtz)
East Star Lode Mine (East Star Mine)
Empire Mine (Empire Vein)
Empire West Mine (Lone Ridge)
Gold Hill Quartz Mine (Gold Hill Mine; Gold Hill Qtz)
Massachusetts Hill Quartz Mine (Massachusetts Hill Qtz; Rocky Bar Mine; Boston Ravine Claim; Great Britain Claim; New Rocky Bar Claim; New York Hill Claim; Polkinghorn Claim; Rocky Bar Claim; Stockbridge Claim)
New Ophir Mine
North Star Group
Oregon Mine (Kate Hayes; Kate Hays; Crescent)
Osborn Hill Mine (Osborn Hill Vein; Woodberry Mine)
Pennsylvania Mine [1] (Pennsylvania Consolidated Qtz; Pennsylvania-W.Y.O.D.; Pennsylvania Vein; Pennsylvania-Wyod; Wyod)
Sultana Mine (Electric Mine; Sultana-Orleans Mine)
Telegraph Mine

Latitude: 39°12'12"N
Longitude: 121°3'20"W
Decimal Degree (lat, lon): 39.203333333333,-121.05555555556

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.

Arsenic	Arsenopyrite	Calcite	Chalcopyrite	Clay	Copper	Mica	Nickeline	None	Pyrite
Quartz	Rocksalt	Scheelite	Sphalerite	Spinel	Tetrahedrite

Altaite ()*	Ankerite ()*	Arsenic ()*	Arsenopyrite ()*	Calcite ()*
Chalcopyrite ()*	Dolomite ()*	Ferrimolybdite ()*	Galena ()*	Gold ()*
Magnetite ()*	Muscovite ()*	Pyrite ()*	Pyrrhotite ()*	Quartz ()*
Scheelite ()*	Sphalerite ()*	Tetrahedrite-(Zn) ()*

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 As Au C Ca Cu Fe H K Mg Mo O Pb S Sb Si Te W Zn

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Arsenic Arsenopyrite Calcite Chalcopyrite Clay Copper Mica Nickeline None Pyrite
Quartz Rocksalt Scheelite Sphalerite Spinel Tetrahedrite

18 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Altaite ()*	Rocksalt	PbTe	1	165416	489
Ankerite ()*	None	Ca(Fe²⁺,Mg)(CO₃)₂	6	165419,165424,165425,165434,165438,165441	3092
Arsenic ()*	Arsenic	As	1	165416	379
Arsenopyrite ()*	Arsenopyrite	FeAsS	3	165438,165441,165442	9052
Calcite ()*	Calcite	Ca(CO₃)	8	165412,165419,165424,165425,165434,165435,165438,165441	27770
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	7	165419,165424,165425,165434,165437,165438,165441	27198
Dolomite ()*	None	CaMg(CO₃)₂	1	165434	9895
Ferrimolybdite ()*	None	Fe³⁺₂(Mo⁶⁺O₄)₃·7H₂O	1	165422	345
Galena ()*	Rocksalt	PbS	12	165412,165417,165419,165424,165425,165434,165437,165438,165440,165441,165444,165450	24243
Gold ()*	Copper	Au	34	165411,165412,165413,165414,165415,165416,165417,165418,165419,165420,165421,165422,165424,165425,165426,165430,165431,165432,165433,165434,165435,165436,165437,165438,165439,165440,165441,165443,165444,165445,165446,165448,165449,165450	30554
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	1	165412	14899
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	6	165419,165424,165425,165434,165438,165441	17380
Pyrite ()*	Pyrite	FeS₂	13	165412,165417,165419,165424,165425,165434,165437,165438,165440,165441,165444,165448,165450	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈	1	165412	9056
Quartz ()*	Quartz	SiO₂	31	165411,165412,165413,165414,165415,165417,165418,165419,165420,165421,165422,165424,165425,165430,165431,165432,165433,165434,165435,165436,165438,165439,165440,165441,165443,165444,165445,165446,165448,165449,165450	61156
Scheelite ()*	Scheelite	Ca(WO₄)	1	165416	4894
Sphalerite ()*	Sphalerite	ZnS	10	165419,165424,165425,165434,165437,165438,165440,165441,165444,165450	21482
Tetrahedrite-(Zn) ()*	Tetrahedrite	Cu₆(Cu₄Zn₂)Sb₄S₁₃	1	165437	5317

No ages have been assigned to this locality yet.

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...