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:
Georgetown District, East Segment Mother Lode, Mother Lode Belt, El Dorado Co., California, USA

Oldest recorded age at locality: 388
Youngest recorded age at locality: 388

mindat Locality ID: 69059
mindat URL: http://www.mindat.org/loc-69059.html

Tectonic Settings:

Total number of sublocalities beneath "Georgetown District, East Segment Mother Lode, Mother Lode Belt, El Dorado Co., California, USA": 89
Total number of bottom-level sublocalities: 82

Number of Child Localities: 6
Child Localities:
Buckeye
Fornis
Garden Valley Area East
Georgetown
Georgia Slide
Meadow Brook

Latitude: 38°53'51"N
Longitude: 120°49'59"W
Decimal Degree (lat, lon): 38.8975,-120.83305555556

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.

Brookite	Calcite	Chlorite	Clay	Copper	Corundum	Enargite	Feldspar	Garnet	Mica
None	Not in a structural group	Prehnite	Pyrite	Pyroxene	Quartz	Rocksalt	Rutile	Scheelite	Serpentine
Smectite-vermiculite	Spinel	Vesuvianite	Wurtzite

Albite ()*	Anatase ()*	Brookite ()*	Calcite ()*	Chromite ()*
Chrysotile ()*	Clinochlore ()*	Copper ()*	Diopside ()*	Enargite ()*
Galena ()*	Gold ()*	Graphite ()*	Grossular ()*	Hessite ()*
Ilmenite ()*	Margarite ()*	Muscovite ()*	Nontronite ()*	Paragonite ()*
Prehnite ()*	Pyrite ()*	Pyrolusite ()*	Quartz ()*	Uvarovite ()*
Vesuvianite ()*	Wulfenite ()*

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: Ag Al As Au C Ca Cr Cu F Fe H K Mg Mn Mo Na O Pb S Si Te Ti

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Brookite Calcite Chlorite Clay Copper Corundum Enargite Feldspar Garnet Mica
None Not in a structural group Prehnite Pyrite Pyroxene Quartz Rocksalt Rutile Scheelite Serpentine
Smectite-vermiculite Spinel Vesuvianite Wurtzite

27 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
Albite ()*	Feldspar	Na(AlSi₃O₈)			1	154492	8803
Anatase ()*	Not in a structural group	TiO₂			1	154512	2162
Brookite ()*	Brookite	TiO₂			1	154512	700
Calcite ()*	Calcite	Ca(CO₃)			1	154492	27770
Chromite ()*	Spinel	Fe²⁺Cr₂O₄	388	388	5	154456,154470,154478,154493,154538	3902
Chrysotile ()*	Serpentine Clay	Mg₃Si₂O₅(OH)₄			1	154510	951
Clinochlore ()*	Chlorite Clay	Mg₅Al(AlSi₃O₁₀)(OH)₈			3	154478,154491,154541	1756
Copper ()*	Copper	Cu			2	154513,154535	3846
Diopside ()*	Pyroxene	CaMgSi₂O₆			1	154541	4135
Enargite ()*	Enargite Wurtzite	Cu₃AsS₄			1	154490	910
Galena ()*	Rocksalt	PbS			1	154491	24243
Gold ()*	Copper	Au			37	154455,154458,154459,154460,154461,154463,154467,154468,154477,154479,154480,154484,154487,154488,154489,154492,154495,154496,154497,154498,154499,154507,154516,154517,154519,154520,154522,154523,154524,154525,154528,154529,154530,154532,154533,154537,154539	30554
Graphite ()*	None	C			1	154504	2812
Grossular ()*	Garnet	Ca₃Al₂(SiO₄)₃			1	154541	1544
Hessite ()*	None	Ag₂Te			1	154491	804
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃			1	154491	5433
Margarite ()*	Mica Clay	CaAl₂Si₂Al₂O₁₀(OH)₂			2	154491,154504	168
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂			2	154485,154504	17380
Nontronite ()*	Clay Smectite-vermiculite	Na_0.3Fe³⁺₂(Si,Al)₄O₁₀(OH)₂·nH₂O			1	154491	471
Paragonite ()*	Mica Clay	NaAl₂(Si₃Al)O₁₀(OH)₂			1	154504	247
Prehnite ()*	Prehnite	Ca₂Al(Si₃Al)O₁₀(OH)₂			1	154541	1898
Pyrite ()*	Pyrite	FeS₂			3	154477,154492,154498	39462
Pyrolusite ()*	Rutile	MnO₂			1	154485	3106
Quartz ()*	Quartz	SiO₂			28	154455,154458,154459,154460,154461,154463,154468,154477,154480,154488,154489,154491,154492,154497,154499,154507,154516,154517,154519,154522,154523,154524,154525,154529,154530,154533,154537,154539	61156
Uvarovite ()*	Garnet	Ca₃Cr₂(SiO₄)₃			1	154478	212
Vesuvianite ()*	Vesuvianite	(Ca,Na)₁₉(Al,Mg,Fe)₁₃(SiO₄)₁₀(Si₂O₇)₄(OH,F,O)₁₀			2	154506,154541	1395
Wulfenite ()*	Scheelite	PbMoO₄			1	154488	1655

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
	podchrome-00128	388	388	pre-Early Devonian-Jurassic (388±17 Ma U-Pb zircon from felsic igneous rocks; 174 Ma K-Ar white mica from blueschists)										Cr	77679	Green Claim, Meadow Brook, Georgetown District, East Segment Mother Lode, Mother Lode Belt, El Dorado Co., California, USA	Green Claim	Moiser et al. (2012)		USGSSIR2012_5157

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...