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:
Julian District, San Diego Co., California, USA

Oldest recorded age at locality: 187
Youngest recorded age at locality: 116

mindat Locality ID: 209217
mindat URL: http://www.mindat.org/loc-209217.html

Tectonic Settings:

Total number of sublocalities beneath "Julian District, San Diego Co., California, USA": 72
Total number of bottom-level sublocalities: 71

Number of Child Localities: 1
Child Localities:
Julian

Latitude: 33°2'57"N
Longitude: 116°35'11"W
Decimal Degree (lat, lon): 33.049166666667,-116.58638888889

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.

Arsenopyrite	Calcite	Chalcopyrite	Clay	Copper	Epsomite	Malachite	Mica	Nickeline	None
Pentlandite	Pyrite	Quartz	Rocksalt	Spinel	Vivianite

Arsenopyrite ()*	Calcite ()*	Chalcopyrite ()*	Chlorargyrite ()*	Erythrite ()*
Gold ()*	Graphite ()*	Hydromagnesite ()*	Magnetite ()*	Malachite ()*
Morenosite ()*	Muscovite ()*	Pentlandite ()*	Petzite ()*	Pyrite ()*
Pyrrhotite ()*	Quartz ()*	Siderite ()*	Violarite ()*

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 Cl Co Cu Fe H K Mg Ni O S Si Te

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Arsenopyrite Calcite Chalcopyrite Clay Copper Epsomite Malachite Mica Nickeline None
Pentlandite Pyrite Quartz Rocksalt Spinel Vivianite

19 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
Arsenopyrite ()*	Arsenopyrite	FeAsS			3	174590,174593,174598	9052
Calcite ()*	Calcite	Ca(CO₃)			1	174598	27770
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	167	163	1	174588	27198
Chlorargyrite ()*	Rocksalt	AgCl			1	174638	1382
Erythrite ()*	Vivianite	Co₃(AsO₄)₂·8H₂O	167	163	1	174588	814
Gold ()*	Copper	Au			3	174590,174598,174617	30554
Graphite ()*	None	C			1	174627	2812
Hydromagnesite ()*	None	Mg₅(CO₃)₄(OH)₂·4H₂O	167	163	1	174588	341
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	167	163	1	174588	14899
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂			1	174638	12537
Morenosite ()*	Epsomite	Ni(SO₄)·7H₂O	167	163	2	174572,174588	84
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂			2	174593,174598	17380
Pentlandite ()*	Pentlandite	(Ni,Fe)₉S₈	167	163	1	174588	1512
Petzite ()*	None	Ag₃AuTe₂			1	174598	409
Pyrite ()*	Pyrite	FeS₂	167	163	3	174588,174598,174617	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈	167	163	2	174588,174593	9056
Quartz ()*	Quartz	SiO₂	167	163	3	174588,174590,174617	61156
Siderite ()*	Calcite	Fe(CO₃)	167	163	1	174588	6417
Violarite ()*	Spinel	FeNi₂S₄	167	163	1	174588	380

5 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Sample Source	Sample Num	Dated Mineral	MinDat Locality ID	Dated Locality (Max Age)	Reference	Reference ID
NAVDAT-44503	187	151	169±18	zircon	44503	Zircon	91167	Butte Prospect, Julian, Julian District, San Diego Co., California, USA	NAVDAT	NAVDAT
NAVDAT-44512	167	163	165±2		44512		11243	Friday Mine, Julian, Julian District, San Diego Co., California, USA	NAVDAT	NAVDAT
NAVDAT-44507	167	163	165±2		44507		91438	Maude E. Claim, Julian, Julian District, San Diego Co., California, USA	NAVDAT	NAVDAT
NAVDAT-44509	167	163	165±2		44509		91438	Maude E. Claim, Julian, Julian District, San Diego Co., California, USA	NAVDAT	NAVDAT
NAVDAT-126294	118	116	117±1		126294		91519	Pioneer Group, Julian, Julian District, San Diego Co., California, USA	NAVDAT	NAVDAT

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...