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:
Big Oak Flat District, East Belt, Tuolumne Co., California, USA

Oldest recorded age at locality: 162.5
Youngest recorded age at locality: 157.4

mindat Locality ID: 244104
mindat URL: http://www.mindat.org/loc-244104.html

Tectonic Settings:

Total number of sublocalities beneath "Big Oak Flat District, East Belt, Tuolumne Co., California, USA": 70
Total number of bottom-level sublocalities: 67

Number of Child Localities: 3
Child Localities:
Big Oak Flat
Groveland
Second Garotte

Latitude: 37°50'1"N
Longitude: 120°13'15"W
Decimal Degree (lat, lon): 37.833611111111,-120.22083333333

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	Chalcopyrite	Clay	Copper	Covellite	Garnet	None	Olivine	Pyrite	Pyroxene
Quartz	Rhodonite	Rocksalt	Rutile	Sphalerite	Talc

Chalcopyrite ()*	Copper ()*	Covellite ()*	Diopside ()*	Forsterite ()*
Galena ()*	Gold ()*	Opal ()*	Pyrite ()*	Pyrolusite ()*
Quartz ()*	Rhodonite ()*	Spessartine ()*	Sphalerite ()*	Talc ()*

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 Ca Cu Fe H Mg Mn O Pb S Si Zn

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Amorphous Chalcopyrite Clay Copper Covellite Garnet None Olivine Pyrite Pyroxene
Quartz Rhodonite Rocksalt Rutile Sphalerite Talc

15 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
Chalcopyrite ()*	Chalcopyrite	CuFeS₂			1	182850	27198
Copper ()*	Copper	Cu			1	182850	3846
Covellite ()*	Covellite	CuS			1	182909	4165
Diopside ()*	Pyroxene	CaMgSi₂O₆			1	182879	4135
Forsterite ()*	Olivine	Mg₂(SiO₄)			1	182879	1188
Galena ()*	Rocksalt	PbS			3	182850,182864,182865	24243
Gold ()*	Copper	Au	162.5	157.4	36	182846,182847,182849,182850,182851,182853,182855,182856,182857,182858,182862,182863,182864,182865,182866,182869,182870,182874,182875,182876,182877,182880,182882,182884,182885,182886,182892,182893,182894,182895,182896,182897,182898,182900,182913,182914	30554
Opal ()*	Amorphous	SiO₂·nH₂O			1	182905	2994
Pyrite ()*	Pyrite	FeS₂			5	182856,182857,182864,182865,182900	39462
Pyrolusite ()*	Rutile	MnO₂			1	182911	3106
Quartz ()*	Quartz	SiO₂			17	182846,182847,182849,182850,182857,182863,182865,182875,182876,182884,182886,182892,182893,182895,182896,182897,182913	61156
Rhodonite ()*	Rhodonite	CaMn₃Mn(Si₅O₁₅)			1	182911	969
Spessartine ()*	Garnet	Mn²⁺₃Al₂(SiO₄)₃			1	182911	1214
Sphalerite ()*	Sphalerite	ZnS			1	182850	21482
Talc ()*	Clay Talc	Mg₃Si₄O₁₀(OH)₂			1	182857	3337

2 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
	USGS-U-Th-Pb-00882_206_238	162.5	162.5	162.5	206_238			zircon				Zircon			97655	Contact Mine, Big Oak Flat, Big Oak Flat District, East Belt, Tuolumne Co., California, USA		USGS-U-Th-Pb		USGS-U-Th-Pb
	USGS-U-Th-Pb-00882_207_235	157.4	157.4	157.4	207_235			zircon				Zircon			97655	Contact Mine, Big Oak Flat, Big Oak Flat District, East Belt, Tuolumne Co., California, USA		USGS-U-Th-Pb		USGS-U-Th-Pb

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...