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:
Alleghany District (Forest District), Sierra Co., California, USA

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

mindat Locality ID: 24049
mindat URL: http://www.mindat.org/loc-24049.html

Tectonic Settings:

Total number of sublocalities beneath "Alleghany District (Forest District), Sierra Co., California, USA": 168
Total number of bottom-level sublocalities: 156

Number of Child Localities: 8
Child Localities:
Alleghany
Chips Flat
Forest
Goodyears Bar
Mack House
Minnesota Flat
Old Mountain House
Plumbago

Latitude: 39°28'35"N
Longitude: 120°51'2"W
Decimal Degree (lat, lon): 39.476388888889,-120.85055555556

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	Amphibole	Arsenopyrite	Calcite	Chalcopyrite	Clay	Clinozoisite	Copper	Epidote	Feldspar
Garnet	Marcasite	Mica	None	Palygorskite	Pentlandite	Pyrite	Quartz	Rocksalt	Rutile
Serpentine	Smectite-vermiculite	Sphalerite	Spinel	Talc	Tetrahedrite

Albite ()*	Ankerite ()*	Arsenopyrite ()*	Beidellite ()*	Calcite ()*
Chalcocite ()*	Chalcopyrite ()*	Chromite ()*	Chrysotile ()*	Dawsonite ()*
Dolomite ()*	Epidote ()*	Galena ()*	Gold ()*	Graphite ()*
Jamesonite ()*	Magnesiochromite ()*	Magnetite ()*	Marcasite ()*	Muscovite ()*
Opal ()*	Orthoclase ()*	Palygorskite ()*	Paragonite ()*	Pentlandite ()*
Pyrite ()*	Quartz ()*	Rutile ()*	Scorodite ()*	Siderite ()*
Silver ()*	Sphalerite ()*	Stromeyerite ()*	Talc ()*	Tetrahedrite-(Zn) ()*
Tremolite ()*	Uvarovite ()*

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 Fe H K Mg Na Ni O Pb S Sb Si Ti Zn

Elements from minerals reported directly at this locality: Al As Ca Cu Fe H Na O S Si

Structural Groups for minerals in this locality:
Amorphous Amphibole Arsenopyrite Calcite Chalcopyrite Clay Clinozoisite Copper Epidote Feldspar
Garnet Marcasite Mica None Palygorskite Pentlandite Pyrite Quartz Rocksalt Rutile
Serpentine Smectite-vermiculite Sphalerite Spinel Talc Tetrahedrite

37 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)			4	177215,177218,177240,177288	8803
Ankerite ()*	None	Ca(Fe²⁺,Mg)(CO₃)₂			4	177215,177222,177240,177331	3092
Arsenopyrite ()*	Arsenopyrite	FeAsS			17	177215,177218,177219,177222,177223,177230,177232,177245,177250,177286,177288,177321,177341,177345,177357,177373,177379	9052
Beidellite ()*	Clay Smectite-vermiculite	(Na,Ca)_0.3Al₂(Si,Al)₄O₁₀(OH)₂·nH₂O	388	388	0		85
Calcite ()*	Calcite	Ca(CO₃)			5	177215,177218,177223,177232,177268	27770
Chalcocite ()*	None	Cu₂S	388	388	0		5707
Chalcopyrite ()*	Chalcopyrite	CuFeS₂			2	177357,177379	27198
Chromite ()*	Spinel	Fe²⁺Cr₂O₄	388	388	7	177274,177275,177312,177313,177325,177355,177363	3902
Chrysotile ()*	Serpentine Clay	Mg₃Si₂O₅(OH)₄			2	177302,177379	951
Dawsonite ()*	None	NaAl(CO₃)(OH)₂			1	177218	90
Dolomite ()*	None	CaMg(CO₃)₂			4	177218,177222,177223,177240	9895
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)			1	177215	8173
Galena ()*	Rocksalt	PbS			7	177223,177230,177240,177288,177357,177373,177379	24243
Gold ()*	Copper	Au	388	388	111	177214,177215,177216,177217,177218,177219,177220,177221,177222,177223,177225,177226,177227,177228,177229,177230,177231,177232,177234,177235,177236,177238,177239,177240,177241,177242,177243,177244,177245,177246,177248,177249,177250,177251,177252,177253,177254,177256,177258,177260,177261,177262,177263,177264,177265,177268,177270,177271,177273,177276,177277,177278,177279,177281,177284,177285,177286,177287,177288,177291,177295,177297,177305,177308,177310,177314,177315,177316,177318,177319,177321,177322,177323,177326,177329,177330,177331,177332,177333,177335,177337,177339,177340,177341,177342,177343,177344,177345,177346,177348,177351,177353,177354,177355,177357,177358,177360,177361,177362,177364,177367,177370,177372,177373,177374,177375,177376,177377,177379,177380,177381	30554
Graphite ()*	None	C			4	177215,177239,177340,177374	2812
Jamesonite ()*	None	Pb₄FeSb₆S₁₄			2	177222,177379	784
Magnesiochromite ()*	Spinel	MgCr₂O₄	388	388	1	177324	311
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄			2	177289,177331	14899
Marcasite ()*	Marcasite	FeS₂			2	177215,177288	5674
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂			12	177215,177218,177219,177222,177223,177243,177265,177331,177341,177343,177353,177379	17380
Opal ()*	Amorphous	SiO₂·nH₂O			1	177215	2994
Orthoclase ()*	Feldspar	K(AlSi₃O₈)			1	177218	2349
Palygorskite ()*	Palygorskite Clay	(Mg,Al)₂Si₄O₁₀(OH)·4H₂O			1	177379	306
Paragonite ()*	Mica Clay	NaAl₂(Si₃Al)O₁₀(OH)₂			1	177218	247
Pentlandite ()*	Pentlandite	(Ni,Fe)₉S₈			1	177215	1512
Pyrite ()*	Pyrite	FeS₂			24	177215,177218,177222,177224,177225,177227,177230,177232,177234,177236,177238,177240,177241,177243,177250,177288,177321,177332,177343,177345,177357,177358,177367,177379	39462
Quartz ()*	Quartz	SiO₂	388	388	90	177215,177216,177217,177218,177219,177220,177221,177222,177223,177224,177225,177226,177227,177228,177229,177230,177232,177234,177235,177236,177238,177239,177240,177241,177242,177243,177244,177245,177248,177249,177250,177252,177253,177254,177256,177260,177261,177265,177268,177271,177273,177275,177276,177277,177281,177286,177287,177288,177297,177305,177308,177310,177314,177315,177316,177319,177321,177326,177329,177330,177331,177332,177333,177335,177337,177339,177340,177341,177343,177344,177345,177346,177348,177351,177353,177354,177355,177357,177358,177367,177370,177372,177373,177374,177375,177376,177377,177379,177380,177381	61156
Rutile ()*	Rutile	TiO₂			3	177218,177288,177379	5614
Scorodite ()*	None	Fe³⁺(AsO₄)·2H₂O	388	388	0		1153
Siderite ()*	Calcite	Fe(CO₃)			4	177222,177232,177240,177268	6417
Silver ()*	Copper	Ag			1	177357	5186
Sphalerite ()*	Sphalerite	ZnS			4	177240,177357,177373,177379	21482
Stromeyerite ()*	None	CuAgS			1	177215	332
Talc ()*	Clay Talc	Mg₃Si₄O₁₀(OH)₂			8	177215,177218,177223,177288,177337,177343,177353,177357	3337
Tetrahedrite-(Zn) ()*	Tetrahedrite	Cu₆(Cu₄Zn₂)Sb₄S₁₃			4	177214,177230,177240,177357	5317
Tremolite ()*	Amphibole	Ca₂(Mg_5.0-4.5Fe²⁺_0.0-0.5)Si₈O₂₂(OH)₂			1	177222	2562
Uvarovite ()*	Garnet	Ca₃Cr₂(SiO₄)₃	388	388	1	177274	212

4 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference ID
podchrome-00192	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	93225	Doriss Mine (Dorriss; Chrome F N; Chrome P N), Forest, Alleghany District (Forest District), Sierra Co., California, USA	Dorriss	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00193	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	93253	Evans Prospect (Oak), Forest, Alleghany District (Forest District), Sierra Co., California, USA	Evans Prospect	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00195	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	93404	Macchaus Mine, Mack House, Alleghany District (Forest District), Sierra Co., California, USA	Macchaus	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00194	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	93261	Finan Mine (F And F Group; Fainine; Finane Mine), Old Mountain House, Alleghany District (Forest District), Sierra Co., California, USA	Finan Prospect	Moiser et al. (2012)	USGSSIR2012_5157

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...