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:
Colfax District (Illinois District), Placer Co., California, USA

mindat Locality ID: 265910
mindat URL: http://www.mindat.org/loc-265910.html

Tectonic Settings:

Total number of sublocalities beneath "Colfax District (Illinois District), Placer Co., California, USA": 72
Total number of bottom-level sublocalities: 64

Number of Child Localities: 7
Child Localities:
Applegate
Cape Horn
Colfax
Last Chance Mine
New England Mills
Shady Glen
Weimar

Latitude: 39°4'28"N
Longitude: 120°56'58"W
Decimal Degree (lat, lon): 39.074444444444,-120.94944444444

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.

Chalcopyrite	Clay	Copper	None	Pyrite	Quartz	Rocksalt	Rutile	Spinel	Talc
Tetrahedrite

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 Cr Cu Fe H Mg Mn O Pb S Sb Si

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Chalcopyrite Clay Copper None Pyrite Quartz Rocksalt Rutile Spinel Talc
Tetrahedrite

9 IMA Minerals at location:

Chalcopyrite ()*	Chromite ()*	Galena ()*	Gold ()*	Pyrite ()*
Pyrolusite ()*	Quartz ()*	Talc ()*	Tetrahedrite-(Zn) ()*

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	3	166685,166703,166705	27198
Chromite ()*	Spinel	Fe²⁺Cr₂O₄	5	166671,166693,166698,166720,166725	3902
Galena ()*	Rocksalt	PbS	2	166685,166734	24243
Gold ()*	Copper	Au	29	166670,166673,166685,166688,166692,166696,166697,166702,166704,166705,166706,166707,166709,166713,166714,166715,166716,166717,166718,166719,166723,166724,166726,166727,166732,166734,166735,166736,166739	30554
Pyrite ()*	Pyrite	FeS₂	10	166685,166692,166705,166713,166714,166715,166719,166726,166734,166736	39462
Pyrolusite ()*	Rutile	MnO₂	1	166737	3106
Quartz ()*	Quartz	SiO₂	22	166673,166680,166685,166692,166704,166705,166713,166714,166715,166716,166717,166718,166719,166723,166724,166726,166727,166732,166734,166735,166736,166739	61156
Talc ()*	Clay Talc	Mg₃Si₄O₁₀(OH)₂	2	166686,166705	3337
Tetrahedrite-(Zn) ()*	Tetrahedrite	Cu₆(Cu₄Zn₂)Sb₄S₁₃	1	166715	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...