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:
Yankee Jims, Forest Hill District, Placer Co., California, USA

mindat Locality ID: 215881
mindat URL: http://www.mindat.org/loc-215881.html

Tectonic Settings:

Total number of sublocalities beneath "Yankee Jims, Forest Hill District, Placer Co., California, USA": 24
Total number of bottom-level sublocalities: 23

Number of Child Localities: 21
Child Localities:
Anthony Clark Tunnels
Armbruster Mine
Ben Franklin Mine
Buchanan Placer
Dow Placer
Emma Deposit
Georgia Hill Mines
Gillespie Occurrence
Gold Hill Mine (Crown Point Mine)
Grey Eagle Mine
Homestake Placer Mine [2]
Jordan Occurrence
Mayflower Gravel Mining Company Mine (Mayflower Mine)
Missouri Placer
Pettigrew-Stafford Mine (Pettigrew - Stafford Lease; Gray Lease)
Randel Claim No. 1 (American; Tilsley And Coplen Claim; Tilsey & Coplen Group [of WWI])
San Francisco Placer
Smiths Point
St. George Placer
Yankee Jims Placer
Yankee Jims Prospect (Yankee Jims Deposit; Lee Deposit)

Latitude: 39°1'38"N
Longitude: 120°51'43"W
Decimal Degree (lat, lon): 39.027222222222,-120.86194444444

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.

Clay	Copper	Mica	None	Quartz	Rhodonite	Rutile

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 Au H K Mn O Si

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Clay Copper Mica None Quartz Rhodonite Rutile

6 IMA Minerals at location:

Gold ()*	Manganite ()*	Muscovite ()*	Pyrolusite ()*	Quartz ()*
Rhodonite ()*

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Gold ()*	Copper	Au	3	167042,167044,167051	30554
Manganite ()*	Rutile	Mn³⁺O(OH)	1	167046	770
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	1	167040	17380
Pyrolusite ()*	Rutile	MnO₂	3	167040,167046,167047	3106
Quartz ()*	Quartz	SiO₂	1	167046	61156
Rhodonite ()*	Rhodonite	CaMn₃Mn(Si₅O₁₅)	2	167040,167047	969

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...