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:
Copper Hill Mine (Cosumnes Mine; Hobo Mine; Jackass Shaft), Four Corners, Amador Co., California, USA

Oldest recorded age at locality: 170
Youngest recorded age at locality: 170

mindat Locality ID: 73552
mindat URL: http://www.mindat.org/loc-73552.html

Tectonic Settings: Continental Arc

Total number of sublocalities beneath "Copper Hill Mine (Cosumnes Mine; Hobo Mine; Jackass Shaft), Four Corners, Amador Co., California, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 38°30'7"N
Longitude: 120°58'"W
Decimal Degree (lat, lon): 38.501944444444,-120.96666666667

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	Epsomite	Malachite	None	Not in a structural group	Pyrite	Sphalerite

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: C Cu Fe H Mg O S Zn

Elements from minerals reported directly at this locality: C Cu Fe H Mg O S Zn

Structural Groups for minerals in this locality:
Chalcopyrite Epsomite Malachite None Not in a structural group Pyrite Sphalerite

8 IMA Minerals at location:

Azurite ()*	Bornite ()*	Chalcocite ()*	Chalcopyrite ()*	Epsomite ()*
Malachite ()*	Pyrite ()*	Sphalerite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Azurite ()*	Not in a structural group	Cu₃(CO₃)₂(OH)₂	170	170	5509
Bornite ()*	None	Cu₅FeS₄	170	170	5516
Chalcocite ()*	None	Cu₂S	170	170	5707
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	170	170	27198
Epsomite ()*	Epsomite	Mg(SO₄)·7H₂O	170	170	484
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	170	170	12537
Pyrite ()*	Pyrite	FeS₂	170	170	39462
Sphalerite ()*	Sphalerite	ZnS	170	170	21482

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
	vms-01027	170	170	Jurassic										S	73552	Copper Hill Mine (Cosumnes Mine; Hobo Mine; Jackass Shaft), Four Corners, Amador Co., California, USA	Copper Hill	Moiser et al. (2009)		USGSOFR2009_1034

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...