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:
Pilliken Mine (Pillikin Mine; Pillikan Mine; Pilliken Chrome Mine), Flagstaff Hill, Salmon Falls District (Flagstaff Hill Area), El Dorado Co., California, USA

Oldest recorded age at locality: 164
Youngest recorded age at locality: 164

mindat Locality ID: 78056
mindat URL: http://www.mindat.org/loc-78056.html

Tectonic Settings:

Total number of sublocalities beneath "Pilliken Mine (Pillikin Mine; Pillikan Mine; Pilliken Chrome Mine), Flagstaff Hill, Salmon Falls District (Flagstaff Hill Area), El Dorado Co., California, USA": 12
Total number of bottom-level sublocalities: 12

Number of Child Localities: 12
Child Localities:
Pillikin Mine Area 1 (East Basin)
Pillikin Mine Area 10
Pillikin Mine Area 11
Pillikin Mine Area 2 (Bonanza King Mine)
Pillikin Mine Area 3 (West Basin)
Pillikin Mine Area 4 (Chrome Gulch)
Pillikin Mine Area 5 (Placer Chrome Company Workings; Placer Chrome Company Mine; Placer Chrome Mine)
Pillikin Mine Area 6
Pillikin Mine Area 7
Pillikin Mine Area 8
Pillikin Mine Area 9
Steele Mine (Steel Deposit)

Latitude: 38°46'54"N
Longitude: 121°5'13"W
Decimal Degree (lat, lon): 38.781666666667,-121.08694444444

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	Calcite	Chlorite	Clay	Clinozoisite	Epidote	Garnet	None	Pyroxene	Serpentine
Spinel	Talc

Antigorite ()*	Chromite ()*	Clinochlore ()*	Diopside ()*	Enstatite ()*
Epidote ()*	Magnesiochromite ()*	Magnesite ()*	Magnetite ()*	Népouite ()*
Opal ()*	Talc ()*	Uvarovite ()*

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 Cr Fe H Mg Ni O Si

Elements from minerals reported directly at this locality: Al H Mg Ni O Si

Structural Groups for minerals in this locality:
Amorphous Calcite Chlorite Clay Clinozoisite Epidote Garnet None Pyroxene Serpentine
Spinel Talc

13 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
Antigorite ()*	Serpentine Clay	Mg₃Si₂O₅(OH)₄			1	155191	708
Chromite ()*	Spinel	Fe²⁺Cr₂O₄	164	164	10	155180,155181,155182,155183,155184,155185,155187,155188,155189,155190	3902
Clinochlore ()*	Chlorite Clay	Mg₅Al(AlSi₃O₁₀)(OH)₈	164	164	0		1756
Diopside ()*	Pyroxene	CaMgSi₂O₆	164	164	1	155180	4135
Enstatite ()*	Pyroxene	Mg₂Si₂O₆	164	164	1	155180	944
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	164	164	1	155186	8173
Magnesiochromite ()*	Spinel	MgCr₂O₄	164	164	2	155186,155191	311
Magnesite ()*	Calcite	Mg(CO₃)	164	164	4	155180,155183,155184,155191	1487
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄			1	155191	14899
Népouite ()*	Serpentine Clay	Ni₃Si₂O₅(OH)₄	164	164	0		66
Opal ()*	Amorphous	SiO₂·nH₂O	164	164	2	155184,155191	2994
Talc ()*	Clay Talc	Mg₃Si₄O₁₀(OH)₂	164	164	7	155180,155183,155184,155185,155188,155189,155190	3337
Uvarovite ()*	Garnet	Ca₃Cr₂(SiO₄)₃	164	164	1	155186	212

7 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-00107	164	164	Middle Jurassic (163±2 to 165±2 m.y. 206Pb/238U)	Cr	78059	Pillikin Mine Area 1 (East Basin), Pilliken Mine (Pillikin Mine; Pillikan Mine; Pilliken Chrome Mine), Flagstaff Hill, Salmon Falls District (Flagstaff Hill Area), El Dorado Co., California, USA	Pillikin East Basin	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00108	164	164	Middle Jurassic (163±2 to 165±2 m.y. 206Pb/238U)	Cr	78062	Pillikin Mine Area 2 (Bonanza King Mine), Pilliken Mine (Pillikin Mine; Pillikan Mine; Pilliken Chrome Mine), Flagstaff Hill, Salmon Falls District (Flagstaff Hill Area), El Dorado Co., California, USA	Bonanza King	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00109	164	164	Middle Jurassic (163±2 to 165±2 m.y. 206Pb/238U)	Cr	78063	Pillikin Mine Area 3 (West Basin), Pilliken Mine (Pillikin Mine; Pillikan Mine; Pilliken Chrome Mine), Flagstaff Hill, Salmon Falls District (Flagstaff Hill Area), El Dorado Co., California, USA	Pillikin West Basin	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00110	164	164	Middle Jurassic (163±2 to 165±2 m.y. 206Pb/238U)	Cr	78057	Pillikin Mine Area 4 (Chrome Gulch), Pilliken Mine (Pillikin Mine; Pillikan Mine; Pilliken Chrome Mine), Flagstaff Hill, Salmon Falls District (Flagstaff Hill Area), El Dorado Co., California, USA	Chrome Gulch	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00115	164	164	Middle Jurassic (163±2 to 165±2 m.y. 206Pb/238U)	Cr	78064	Pillikin Mine Area 5 (Placer Chrome Company Workings; Placer Chrome Company Mine; Placer Chrome Mine), Pilliken Mine (Pillikin Mine; Pillikan Mine; Pilliken Chrome Mine), Flagstaff Hill, Salmon Falls District (Flagstaff Hill Area), El Dorado Co., California, USA	Shirt Tail Peak	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00113	164	164	Middle Jurassic (163±2 to 165±2 m.y. 206Pb/238U)	Cr	78067	Pillikin Mine Area 8, Pilliken Mine (Pillikin Mine; Pillikan Mine; Pilliken Chrome Mine), Flagstaff Hill, Salmon Falls District (Flagstaff Hill Area), El Dorado Co., California, USA	Pillikin Area 8	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00114	164	164	Middle Jurassic (163±2 to 165±2 m.y. 206Pb/238U)	Cr	78068	Pillikin Mine Area 9, Pilliken Mine (Pillikin Mine; Pillikan Mine; Pilliken Chrome Mine), Flagstaff Hill, Salmon Falls District (Flagstaff Hill Area), El Dorado Co., California, USA	Pillikin Area 9	Moiser et al. (2012)	USGSSIR2012_5157

Sample	Source Locality	Reference URL
R110060	Pilliken Mine (Pillikin Mine; Pillikan Mine; Pilliken Chrome Mine), Flagstaff Hill, Salmon Falls District (Flagstaff Hill Area), El Dorado Co., California, USA	https://rruff.info/R110060

All locality data graciously provided by mindat.org

All age data...