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:
Murphys District (Esmeralda District; Sperry District), East Belt, Calaveras Co., California, USA

Oldest recorded age at locality: 300
Youngest recorded age at locality: 100

mindat Locality ID: 209194
mindat URL: http://www.mindat.org/loc-209194.html

Tectonic Settings:

Total number of sublocalities beneath "Murphys District (Esmeralda District; Sperry District), East Belt, Calaveras Co., California, USA": 140
Total number of bottom-level sublocalities: 132

Number of Child Localities: 6
Child Localities:
Esmeralda
High Mountain
Indian Creek
La Honda Park
Murphys
Wyldwood

Latitude: 38°9'17"N
Longitude: 120°28'40"W
Decimal Degree (lat, lon): 38.154722222222,-120.47777777778

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.

Amphibole	Aragonite	Arsenic	Arsenopyrite	Baryte	Calcite	Chalcopyrite	Clay	Clinozoisite	Copper
Corundum	Epidote	Garnet	Mica	None	Not in a structural group	Pyrite	Quartz	Rhodonite	Rocksalt
Serpentine	Sphalerite	Spinel	Stibnite	Talc	Tetradymite	Tetrahedrite	Vivianite

Antigorite ()*	Antimony ()*	Aragonite ()*	Arsenopyrite ()*	Azurite ()*
Baryte ()*	Bornite ()*	Calcite ()*	Chalcocite ()*	Chalcopyrite ()*
Chromite ()*	Cinnabar ()*	Dolomite ()*	Epidote ()*	Erythrite ()*
Galena ()*	Glaucophane ()*	Gold ()*	Graphite ()*	Hematite ()*
Hessite ()*	Magnesiochromite ()*	Magnetite ()*	Muscovite ()*	Petzite ()*
Pyrite ()*	Quartz ()*	Rhodonite ()*	Spessartine ()*	Sphalerite ()*
Stibnite ()*	Talc ()*	Tetradymite ()*	Tetrahedrite-(Zn) ()*

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 Ba Bi C Ca Co Cr Cu Fe H Hg K Mg Mn Na O Pb S Sb Si Te Zn

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Amphibole Aragonite Arsenic Arsenopyrite Baryte Calcite Chalcopyrite Clay Clinozoisite Copper
Corundum Epidote Garnet Mica None Not in a structural group Pyrite Quartz Rhodonite Rocksalt
Serpentine Sphalerite Spinel Stibnite Talc Tetradymite Tetrahedrite Vivianite

34 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
Antigorite ()*	Serpentine Clay	Mg₃Si₂O₅(OH)₄	100	100	2	152417,152422	708
Antimony ()*	Arsenic	Sb	100	100	1	152365	363
Aragonite ()*	Aragonite	Ca(CO₃)	100	100	1	152432	3250
Arsenopyrite ()*	Arsenopyrite	FeAsS	100	100	2	152365,152369	9052
Azurite ()*	Not in a structural group	Cu₃(CO₃)₂(OH)₂	100	100	1	152423	5509
Baryte ()*	Baryte	Ba(SO₄)	100	100	1	152365	11547
Bornite ()*	None	Cu₅FeS₄	100	100	1	152423	5516
Calcite ()*	Calcite	Ca(CO₃)	100	100	1	152382	27770
Chalcocite ()*	None	Cu₂S	100	100	1	152365	5707
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	100	100	1	152365	27198
Chromite ()*	Spinel	Fe²⁺Cr₂O₄	300	100	3	152422,152426,152435	3902
Cinnabar ()*	None	HgS	100	100	1	152388	2600
Dolomite ()*	None	CaMg(CO₃)₂	100	100	1	152388	9895
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	100	100	1	152327	8173
Erythrite ()*	Vivianite	Co₃(AsO₄)₂·8H₂O	100	100	1	152369	814
Galena ()*	Rocksalt	PbS	100	100	5	152365,152375,152388,152415,152429	24243
Glaucophane ()*	Amphibole	Na₂(Mg₃Al₂)Si₈O₂₂(OH)₂	100	100	1	152365	286
Gold ()*	Copper	Au	100	100	94	152305,152306,152307,152308,152309,152310,152311,152312,152313,152314,152315,152316,152317,152318,152320,152321,152323,152325,152329,152330,152331,152332,152333,152334,152335,152336,152337,152338,152339,152340,152341,152343,152344,152346,152348,152350,152352,152353,152354,152355,152357,152359,152360,152361,152362,152364,152365,152366,152370,152371,152372,152374,152375,152376,152379,152380,152385,152386,152387,152388,152390,152391,152392,152393,152394,152395,152396,152397,152398,152400,152401,152403,152404,152405,152406,152407,152408,152409,152411,152412,152413,152415,152416,152419,152420,152421,152424,152427,152428,152429,152430,152437,152439,152440	30554
Graphite ()*	None	C	100	100	1	152308	2812
Hematite ()*	Corundum	Fe₂O₃	100	100	1	152358	14640
Hessite ()*	None	Ag₂Te	100	100	1	152365	804
Magnesiochromite ()*	Spinel	MgCr₂O₄	300	300	1	152378	311
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	100	100	1	152417	14899
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	100	100	1	152351	17380
Petzite ()*	None	Ag₃AuTe₂	100	100	1	152365	409
Pyrite ()*	Pyrite	FeS₂	100	100	4	152365,152375,152415,152429	39462
Quartz ()*	Quartz	SiO₂	100	100	79	152305,152307,152308,152309,152310,152311,152313,152314,152315,152316,152317,152318,152321,152323,152330,152331,152332,152333,152334,152335,152336,152337,152338,152339,152340,152341,152343,152344,152346,152348,152350,152352,152353,152354,152355,152357,152360,152365,152366,152370,152371,152372,152374,152375,152376,152379,152380,152385,152386,152390,152391,152392,152393,152394,152395,152396,152397,152400,152403,152404,152405,152406,152407,152408,152409,152411,152412,152413,152415,152416,152419,152420,152421,152424,152427,152429,152436,152439,152440	61156
Rhodonite ()*	Rhodonite	CaMn₃Mn(Si₅O₁₅)	100	100	2	152368,152369	969
Spessartine ()*	Garnet	Mn²⁺₃Al₂(SiO₄)₃	100	100	3	152351,152368,152369	1214
Sphalerite ()*	Sphalerite	ZnS	100	100	2	152365,152375	21482
Stibnite ()*	Stibnite	Sb₂S₃	100	100	2	152365,152388	3418
Talc ()*	Clay Talc	Mg₃Si₄O₁₀(OH)₂	100	100	2	152314,152402	3337
Tetradymite ()*	Tetradymite	Bi₂Te₂S	100	100	1	152375	510
Tetrahedrite-(Zn) ()*	Tetrahedrite	Cu₆(Cu₄Zn₂)Sb₄S₁₃	100	100	1	152388	5317

3 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
podchrome-00082	300	300	Upper Paleozoic			Cr	75545	Madrid Mine (True Blue Mine; Genochio Mine; Medrid Mine), Murphys, Murphys District (Esmeralda District; Sperry District), East Belt, Calaveras Co., California, USA	Madrid	Moiser et al. (2012)		USGSSIR2012_5157
podchrome-00083	300	300	Upper Paleozoic			Cr	76160	Valenti Claim, Soapstone Hill, Murphys, Murphys District (Esmeralda District; Sperry District), East Belt, Calaveras Co., California, USA	Valenti Claim	Moiser et al. (2012)		USGSSIR2012_5157

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...