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:
Copperopolis, Foothill Copper Belt, Calaveras Co., California, USA

Oldest recorded age at locality: 281
Youngest recorded age at locality: 100

mindat Locality ID: 24965
mindat URL: http://www.mindat.org/loc-24965.html

Tectonic Settings:

Total number of sublocalities beneath "Copperopolis, Foothill Copper Belt, Calaveras Co., California, USA": 21
Total number of bottom-level sublocalities: 20

Number of Child Localities: 18
Child Localities:
Barnyard Mine
Bear Mountain Ranch Occurrence
Big Seven Mine
Big Seven Ridge Mine
Burnham Mine
Copperopolis Mines (Copperopolis Group)
Davis Mine
Donner Mine
Gateway Mine
Jackson McCarthy Mine (Old Calaveras Mine)
Johnson Operation
McCarty Mine [1]
Nassua-Copperopolis Area
Pacific Asbestos Mine (Pacific Asbestos Pit)
Stone Mine (Trask Mine; Longton Mine; Coffer Mine; Trask And Stone Lease)
Union Mine
Unknown Cr Prospect [10]
Unnamed Cu Prospect [15]

Latitude: 37°59'10"N
Longitude: 120°37'47"W
Decimal Degree (lat, lon): 37.986111111111,-120.62972222222

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.

Andalusite	Baryte	Brochantite	Calcite	Chalcanthite	Chalcopyrite	Clay	Clinozoisite	Copper	Corundum
Covellite	Epidote	Hydrotalcite	Malachite	Mica	None	Not in a structural group	Pyrite	Quartz	Rocksalt
Rutile	Sphalerite	Spinel	Talc	Titanite	Vivianite

Andalusite ()*	Azurite ()*	Baryte ()*	Bornite ()*	Brochantite ()*
Calcite ()*	Chalcanthite ()*	Chalcopyrite ()*	Chromite ()*	Copper ()*
Covellite ()*	Cuprite ()*	Epidote ()*	Galena ()*	Gold ()*
Hematite ()*	Ilmenite ()*	Magnesiochromite ()*	Malachite ()*	Muscovite ()*
Pyrite ()*	Quartz ()*	Reevesite ()*	Rutile ()*	Sphalerite ()*
Talc ()*	Tenorite ()*	Titanite ()*	Vivianite ()*

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 Ba C Ca Cr Cu Fe H K Mg Ni O P Pb S Si Ti Zn

Elements from minerals reported directly at this locality: Fe H O P

Structural Groups for minerals in this locality:
Andalusite Baryte Brochantite Calcite Chalcanthite Chalcopyrite Clay Clinozoisite Copper Corundum
Covellite Epidote Hydrotalcite Malachite Mica None Not in a structural group Pyrite Quartz Rocksalt
Rutile Sphalerite Spinel Talc Titanite Vivianite

29 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
Andalusite ()*	Andalusite	Al₂SiO₅	170	170	1	152798	1310
Azurite ()*	Not in a structural group	Cu₃(CO₃)₂(OH)₂	170	170	1	152795	5509
Baryte ()*	Baryte	Ba(SO₄)	100	100	1	152792	11547
Bornite ()*	None	Cu₅FeS₄	170	170	2	152795,152798	5516
Brochantite ()*	Brochantite	Cu₄(SO₄)(OH)₆	170	170	1	152795	1633
Calcite ()*	Calcite	Ca(CO₃)	170	100	2	152792,152798	27770
Chalcanthite ()*	Chalcanthite	Cu(SO₄)·5H₂O	100	100	1	152802	925
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	170	100	6	152795,152796,152797,152798,152802,152808	27198
Chromite ()*	Spinel	Fe²⁺Cr₂O₄	100	100	1	152809	3902
Copper ()*	Copper	Cu	170	100	3	152795,152798,152808	3846
Covellite ()*	Covellite	CuS	100	100	1	152805	4165
Cuprite ()*	Not in a structural group	Cu₂O	170	100	4	152795,152796,152798,152802	2970
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	170	170	1	152798	8173
Galena ()*	Rocksalt	PbS	100	100	1	152792	24243
Gold ()*	Copper	Au	100	100	4	152790,152792,152801,152808	30554
Hematite ()*	Corundum	Fe₂O₃	170	170	1	152798	14640
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃	170	170	1	152798	5433
Magnesiochromite ()*	Spinel	MgCr₂O₄	281	100	4	152791,152794,152799,152807	311
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	170	100	4	152795,152798,152802,152808	12537
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	100	100	1	152792	17380
Pyrite ()*	Pyrite	FeS₂	170	100	3	152792,152797,152798	39462
Quartz ()*	Quartz	SiO₂	170	100	6	152790,152792,152797,152798,152801,152802	61156
Reevesite ()*	Hydrotalcite	Ni₆Fe³⁺₂(CO₃)(OH)₁₆·4H₂O	100	100	1	152806	48
Rutile ()*	Rutile	TiO₂	170	170	1	152798	5614
Sphalerite ()*	Sphalerite	ZnS	100	100	1	152792	21482
Talc ()*	Clay Talc	Mg₃Si₄O₁₀(OH)₂	281	281	1	152807	3337
Tenorite ()*	None	CuO	170	170	1	152795	1101
Titanite ()*	Titanite	CaTi(SiO₄)O	170	170	1	152798	4899
Vivianite ()*	Vivianite	Fe²⁺₃(PO₄)₂·8H₂O	281	170	0		636

4 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Age from other Locality	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
Mo-00156	100	100		Yes	Molybdenite	Mo	16293	Calaveras Co., California, USA	Calaveras County	Brock (1972)	10.1130/0016-7606(1972)83[3391:GOGHSC]2.0.CO;2	GSAB83_3391
vms-01034	170	170	Jurassic			S	75449	Keystone-Union Mine (Calaveras Copper), Copperopolis Mines (Copperopolis Group), Copperopolis, Foothill Copper Belt, Calaveras Co., California, USA	Keystone-Union	Moiser et al. (2009)		USGSOFR2009_1034
vms-01037	170	170	Jurassic			S	13833	North Keystone Mine (Keystone Mine), Copperopolis Mines (Copperopolis Group), Copperopolis, Foothill Copper Belt, Calaveras Co., California, USA	North Keystone	Moiser et al. (2009)		USGSOFR2009_1034
podchrome-00065	281	281	Permian (280±3 m.y. 206Pb/238U, 282±3 m.y. 207Pb/235U)			Cr	75959	Stone Mine (Trask Mine; Longton Mine; Coffer Mine; Trask And Stone Lease), Copperopolis, Foothill Copper Belt, Calaveras Co., California, USA	Stone	Moiser et al. (2012)		USGSSIR2012_5157

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...