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:
Sierra City District, Sierra Co., California, USA

Oldest recorded age at locality: 400
Youngest recorded age at locality: 400

mindat Locality ID: 208976
mindat URL: http://www.mindat.org/loc-208976.html

Tectonic Settings:

Total number of sublocalities beneath "Sierra City District, Sierra Co., California, USA": 163
Total number of bottom-level sublocalities: 155

Number of Child Localities: 8
Child Localities:
Bassetts
Church Meadows
Gold Lake
Hawley Lake
Loeffler Mine
Loganville
Sierra City
Spencer Lakes

Latitude: 39°37'32"N
Longitude: 120°38'54"W
Decimal Degree (lat, lon): 39.625555555556,-120.64833333333

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	Chalcopyrite	Clay	Copper	Corundum	Garnet	Malachite	Marcasite	Molybdenite	None
Pyrite	Pyroxene	Quartz	Rocksalt	Spinel	Talc	Wollastonite

Augite ()*	Calcite ()*	Chalcopyrite ()*	Chromite ()*	Copper ()*
Dolomite ()*	Ferrimolybdite ()*	Galena ()*	Gold ()*	Hematite ()*
Magnetite ()*	Malachite ()*	Marcasite ()*	Molybdenite ()*	Molybdite ()*
Pyrite ()*	Quartz ()*	Talc ()*	Uvarovite ()*	Wollastonite ()*

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 Cr Cu Fe H Mg Mo O Pb S Si

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Calcite Chalcopyrite Clay Copper Corundum Garnet Malachite Marcasite Molybdenite None
Pyrite Pyroxene Quartz Rocksalt Spinel Talc Wollastonite

20 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
Augite ()*	Pyroxene	(Ca,Mg,Fe)₂Si₂O₆			1	177881	2060
Calcite ()*	Calcite	Ca(CO₃)			1	177902	27770
Chalcopyrite ()*	Chalcopyrite	CuFeS₂			4	177857,177897,177965,177990	27198
Chromite ()*	Spinel	Fe²⁺Cr₂O₄	400	400	1	177987	3902
Copper ()*	Copper	Cu			1	177849	3846
Dolomite ()*	None	CaMg(CO₃)₂			1	177902	9895
Ferrimolybdite ()*	None	Fe³⁺₂(Mo⁶⁺O₄)₃·7H₂O			1	177996	345
Galena ()*	Rocksalt	PbS			6	177897,177906,177920,177925,177942,177990	24243
Gold ()*	Copper	Au			80	177850,177852,177853,177856,177857,177859,177860,177861,177868,177870,177872,177874,177876,177878,177880,177881,177890,177891,177895,177896,177897,177898,177899,177900,177903,177904,177906,177909,177910,177912,177919,177920,177921,177922,177924,177925,177926,177928,177931,177932,177933,177934,177935,177936,177938,177939,177940,177942,177944,177945,177946,177947,177948,177949,177950,177951,177952,177953,177958,177959,177962,177964,177969,177971,177973,177975,177976,177981,177982,177983,177988,177990,177991,177992,177995,177996,177997,177998,177999,178007	30554
Hematite ()*	Corundum	Fe₂O₃			1	177897	14640
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄			2	177902,178009	14899
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂			1	177857	12537
Marcasite ()*	Marcasite	FeS₂			1	177996	5674
Molybdenite ()*	Molybdenite	MoS₂			1	177996	5800
Molybdite ()*	None	MoO₃			1	177996	140
Pyrite ()*	Pyrite	FeS₂			8	177897,177906,177919,177920,177925,177942,177990,177996	39462
Quartz ()*	Quartz	SiO₂			63	177850,177852,177853,177857,177860,177861,177870,177872,177874,177878,177880,177881,177890,177891,177897,177898,177899,177900,177904,177906,177910,177912,177919,177920,177921,177925,177926,177928,177931,177932,177933,177934,177936,177938,177939,177940,177942,177944,177945,177946,177947,177948,177949,177950,177951,177952,177953,177958,177959,177969,177971,177975,177976,177982,177988,177990,177991,177995,177996,177997,177998,177999,178007	61156
Talc ()*	Clay Talc	Mg₃Si₄O₁₀(OH)₂			1	177902	3337
Uvarovite ()*	Garnet	Ca₃Cr₂(SiO₄)₃	400	400	1	177987	212
Wollastonite ()*	Wollastonite	CaSiO₃			1	178005	1247

1 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
	podchrome-00190	400	400	Ordovician-Devonian? (fossils); 1318-561 Ma U-Pb detrital zircon										Cr	93430	Milton Claim (Redmayne And McGonigal Prospect), Sierra City, Sierra City District, Sierra Co., California, USA	Milton Claim	Moiser et al. (2012)		USGSSIR2012_5157

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...