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.

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.

Amorphous	Arsenic	Arsenopyrite	Calcite	Chalcopyrite	Clay	Clinozoisite	Copper	Epidote	Mica
Nickeline	None	Not in a structural group	Pyrite	Quartz	Rocksalt	Scheelite	Sphalerite	Spinel	Talc
Tetrahedrite

Altaite ()*	Ankerite ()*	Arsenic ()*	Arsenopyrite ()*	Calcite ()*
Chalcopyrite ()*	Chromite ()*	Dolomite ()*	Epidote ()*	Ferrimolybdite ()*
Galena ()*	Gold ()*	Hessite ()*	Magnesite ()*	Magnetite ()*
Muscovite ()*	Naumannite ()*	Opal ()*	Petzite ()*	Pyrite ()*
Pyrrhotite ()*	Quartz ()*	Scheelite ()*	Sphalerite ()*	Talc ()*
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: Ag Al As Au C Ca Cr Cu Fe H K Mg Mo O Pb S Sb Se Si Te W Zn

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Amorphous Arsenic Arsenopyrite Calcite Chalcopyrite Clay Clinozoisite Copper Epidote Mica
Nickeline None Not in a structural group Pyrite Quartz Rocksalt Scheelite Sphalerite Spinel Talc
Tetrahedrite

26 IMA Minerals at location:

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
Altaite ()*	Rocksalt	PbTe			1	165416	489
Ankerite ()*	None	Ca(Fe²⁺,Mg)(CO₃)₂			8	165419,165424,165425,165434,165438,165441,165461,165494	3092
Arsenic ()*	Arsenic	As			2	165373,165416	379
Arsenopyrite ()*	Arsenopyrite	FeAsS			3	165438,165441,165442	9052
Calcite ()*	Calcite	Ca(CO₃)			13	165373,165412,165419,165424,165425,165434,165435,165438,165441,165461,165471,165494,165498	27770
Chalcopyrite ()*	Chalcopyrite	CuFeS₂			14	165389,165419,165424,165425,165434,165437,165438,165441,165461,165491,165492,165494,165517,165546	27198
Chromite ()*	Spinel	Fe²⁺Cr₂O₄	204	157	10	165382,165384,165402,165405,165455,165469,165473,165482,165577,165604	3902
Dolomite ()*	None	CaMg(CO₃)₂			2	165434,165494	9895
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)			2	165389,165579	8173
Ferrimolybdite ()*	None	Fe³⁺₂(Mo⁶⁺O₄)₃·7H₂O			1	165422	345
Galena ()*	Rocksalt	PbS			20	165389,165400,165412,165417,165419,165424,165425,165434,165437,165438,165440,165441,165444,165450,165461,165479,165491,165492,165494,165498	24243
Gold ()*	Copper	Au	157	157	181	165372,165373,165374,165376,165378,165379,165380,165383,165385,165386,165388,165389,165390,165391,165393,165399,165400,165401,165403,165404,165406,165407,165408,165409,165411,165412,165413,165414,165415,165416,165417,165418,165419,165420,165421,165422,165424,165425,165426,165430,165431,165432,165433,165434,165435,165436,165437,165438,165439,165440,165441,165443,165444,165445,165446,165448,165449,165450,165451,165452,165453,165454,165456,165457,165459,165460,165461,165462,165463,165464,165466,165468,165470,165471,165474,165475,165477,165478,165479,165480,165481,165483,165485,165486,165487,165488,165489,165491,165492,165493,165494,165495,165498,165499,165501,165502,165503,165504,165505,165506,165507,165509,165510,165511,165512,165513,165514,165515,165516,165518,165519,165520,165521,165522,165523,165524,165525,165526,165527,165528,165529,165530,165531,165532,165533,165534,165536,165537,165538,165539,165540,165542,165543,165544,165545,165546,165547,165548,165549,165550,165551,165553,165554,165555,165556,165557,165559,165560,165561,165562,165563,165564,165565,165566,165567,165568,165569,165570,165571,165574,165575,165578,165581,165582,165583,165585,165586,165588,165589,165590,165591,165592,165595,165596,165597,165598,165599,165600,165601,165602,165603	30554
Hessite ()*	None	Ag₂Te			1	165494	804
Magnesite ()*	Calcite	Mg(CO₃)			2	165494,165594	1487
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄			2	165412,165579	14899
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂			9	165419,165424,165425,165434,165438,165441,165461,165464,165494	17380
Naumannite ()*	Not in a structural group	Ag₂Se			1	165494	192
Opal ()*	Amorphous	SiO₂·nH₂O			1	165487	2994
Petzite ()*	None	Ag₃AuTe₂			1	165494	409
Pyrite ()*	Pyrite	FeS₂			25	165386,165389,165400,165412,165417,165419,165424,165425,165434,165437,165438,165440,165441,165444,165448,165450,165461,165464,165479,165491,165492,165494,165498,165546,165579	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈			2	165412,165517	9056
Quartz ()*	Quartz	SiO₂	157	157	177	165372,165373,165374,165376,165378,165379,165380,165383,165385,165386,165388,165389,165390,165391,165393,165397,165399,165401,165403,165404,165406,165407,165408,165409,165411,165412,165413,165414,165415,165417,165418,165419,165420,165421,165422,165424,165425,165430,165431,165432,165433,165434,165435,165436,165438,165439,165440,165441,165443,165444,165445,165446,165448,165449,165450,165451,165452,165453,165454,165456,165457,165459,165460,165461,165462,165463,165464,165466,165468,165470,165471,165474,165475,165477,165478,165479,165480,165481,165483,165485,165486,165487,165488,165489,165491,165492,165493,165494,165495,165498,165499,165501,165502,165503,165504,165505,165506,165507,165509,165510,165511,165512,165513,165514,165515,165518,165519,165520,165521,165522,165523,165524,165525,165526,165527,165528,165529,165530,165531,165532,165533,165534,165536,165537,165538,165539,165540,165542,165543,165544,165545,165546,165547,165548,165549,165550,165551,165553,165554,165555,165556,165557,165559,165560,165561,165562,165563,165564,165565,165566,165567,165568,165569,165570,165571,165574,165575,165578,165581,165582,165583,165585,165586,165588,165589,165590,165591,165592,165595,165596,165597,165598,165599,165600,165601,165602,165603	61156
Scheelite ()*	Scheelite	Ca(WO₄)			3	165416,165494,165499	4894
Sphalerite ()*	Sphalerite	ZnS			15	165419,165424,165425,165434,165437,165438,165440,165441,165444,165450,165461,165491,165492,165494,165498	21482
Talc ()*	Clay Talc	Mg₃Si₄O₁₀(OH)₂	157	157	2	165494,165575	3337
Tetrahedrite-(Zn) ()*	Tetrahedrite	Cu₆(Cu₄Zn₂)Sb₄S₁₃			1	165437	5317

5 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference ID
podchrome-00175	157	157	Middle Jurassic	Cr	83807	Alta Hill Mine (Alta Hill; Alta Hill Chrome Mine), Grass Valley, Grass Valley District, Nevada Co., California, USA	Alta Hill	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00180	204	204	Upper Triassic-Lower Jurassic or older (204±2 Ma U-Pb zircon on leucodiorite)	Cr	84039	Dickerson Property, Grass Valley, Grass Valley District, Nevada Co., California, USA	Dickerson Property	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00177	157	157	Middle Jurassic	Cr	84124	Geach Property, Grass Valley, Grass Valley District, Nevada Co., California, USA	Geach	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00174	157	157	Middle Jurassic	Cr	84231	Holseman Mine, Grass Valley, Grass Valley District, Nevada Co., California, USA	Holseman	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00176	157	157	Middle Jurassic	Cr	84753	Spring Hill Occurrence, Grass Valley, Grass Valley District, Nevada Co., California, USA	Spring Hill	Moiser et al. (2012)	USGSSIR2012_5157

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...