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:
Bald Mountain District, Lawrence Co., South Dakota, USA

Oldest recorded age at locality: 60
Youngest recorded age at locality: 39

mindat Locality ID: 8537
mindat URL: http://www.mindat.org/loc-8537.html

Tectonic Settings:

Total number of sublocalities beneath "Bald Mountain District, Lawrence Co., South Dakota, USA": 38
Total number of bottom-level sublocalities: 37

Number of Child Localities: 37
Child Localities:
Alameda Mine
American Eagle Mine
Annie Creek
Apex Mine
Baltimore Mine (Baltimore And Richmond Mine)
Burlington And Golden Sands
Clinton Upper Portland
Crown Hill Mine
Dakota
Dakota Group (O; Peggy; Little Rock; Joseph; Jim; Wedge Claims; Gunnison; Vulcan; Rehl; Lucy; Tiger; Moh)
Dark Horse Claim
Dividend Mine (Decorah Mine)
Empire State M.S. 357 (Empire)
Finlander
Foley Mountain
Foley No. 1
Foley No. 2
Foley No. 3
Folger Mine
Golden Bottle
Gunnison And Vulcan Mine (Dakota Group)
Gushurst And Manchester
Johnson Gulch
Juno Mine
Leopard-Jessie Lee Mine (Upper Portland Mine)
Marie And Mary Claim
Mark Twain Mine
Mikado Claim
Monday Group Mine (Monday Reindeer Claim)
Perseverance Mine
Portland Mine
Reliance Mine (Iron Duke; Monitor; Annie Creek; Ak-Sar-Ben; University; Bunker Hill)
Snowstorm Mine
South Dakota
Two Johns Mine (Rua Group Mine)
Unnamed Prospect
Wharf Mine

Latitude: 44°20'37"N
Longitude: 103°50'37"W
Decimal Degree (lat, lon): 44.343611111111,-103.84361111111

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.

Adelite	Allophane	Alunite	Amorphous	Apatite	Aragonite	Arsenopyrite	Autunite	Baryte	Calcioferrite
Calcite	Cancrinite-sodalite	Chalcopyrite	Clay	Copiapite	Copper	Coronadite	Corundum	Diaspore	Dufrénite
Feldspar	Fluorite	Gypsum	Kaolinite	Löllingite	Melonite	Mica	Mixite	Nickeline	None
Not in a structural group	Pharmacosiderite	Phosphofibrite	Pyrite	Pyroxene	Quartz	Rocksalt	Smectite-vermiculite	Sodalite	Sphalerite
Stibnite	Tridymite

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 Br C Ca Cl Cu F Fe H K Mg Mn Na O P Pb S Sb Si Te U Zn

Elements from minerals reported directly at this locality: Al Ca Cu Fe H O Pb S Si Te U

Structural Groups for minerals in this locality:
Adelite Allophane Alunite Amorphous Apatite Aragonite Arsenopyrite Autunite Baryte Calcioferrite
Calcite Cancrinite-sodalite Chalcopyrite Clay Copiapite Copper Coronadite Corundum Diaspore Dufrénite
Feldspar Fluorite Gypsum Kaolinite Löllingite Melonite Mica Mixite Nickeline None
Not in a structural group Pharmacosiderite Phosphofibrite Pyrite Pyroxene Quartz Rocksalt Smectite-vermiculite Sodalite Sphalerite
Stibnite Tridymite

53 IMA Minerals at location:

Aegirine ()*	Albite ()*	Altaite ()*	Aluminocopiapite ()*	Anhydrite ()*
Arsenopyrite ()*	Autunite ()*	Baryte ()*	Bromargyrite ()*	Calcite ()*
Cerussite ()*	Chalcopyrite ()*	Chlorargyrite ()*	Chrysocolla ()*	Conichalcite ()*
Crandallite ()*	Dolomite ()*	Dufrénite ()*	Fluorapatite ()*	Fluorite ()*
Galena ()*	Goethite ()*	Gold ()*	Gypsum ()*	Hematite ()*
Hollandite ()*	Jarosite ()*	Kaolinite ()*	Löllingite ()*	Metauranocircite-I ()*
Meurigite-K ()*	Microcline ()*	Minyulite ()*	Montgomeryite ()*	Muscovite ()*
Nontronite ()*	Nosean ()*	Opal ()*	Orthoclase ()*	Pharmacosiderite ()*
Pyrite ()*	Pyrrhotite ()*	Quartz ()*	Rhodochrosite ()*	Silver ()*
Sphalerite ()*	Stibnite ()*	Sylvanite ()*	Tridymite ()*	Uraninite ()*
Uranocircite-II ()*	Variscite ()*	Zálesíite ()*

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
Aegirine ()*	Pyroxene	NaFe³⁺Si₂O₆			1	265467	1022
Albite ()*	Feldspar	Na(AlSi₃O₈)			1	265489	8803
Altaite ()*	Rocksalt	PbTe	60	39	0		489
Aluminocopiapite ()*	Copiapite	(Al,Mg)Fe³⁺₄(SO₄)₆(OH,O)₂·20H₂O			1	265489	50
Anhydrite ()*	Not in a structural group	Ca(SO₄)			1	265489	1588
Arsenopyrite ()*	Arsenopyrite	FeAsS			1	265489	9052
Autunite ()*	Autunite	Ca(UO₂)₂(PO₄)₂·10-12H₂O	60	39	2	265455,265484	1272
Baryte ()*	Baryte	Ba(SO₄)			1	265489	11547
Bromargyrite ()*	Rocksalt	AgBr			1	265489	227
Calcite ()*	Calcite	Ca(CO₃)			1	265489	27770
Cerussite ()*	Aragonite	Pb(CO₃)			1	265474	4979
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	60	39	0		27198
Chlorargyrite ()*	Rocksalt	AgCl			2	265483,265485	1382
Chrysocolla ()*	Allophane	(Cu_2-xAl_x)H_2-xSi₂O₅(OH)₄·nH₂O	60	39	0		3531
Conichalcite ()*	Adelite	CaCu(AsO₄)(OH)			1	265489	363
Crandallite ()*	Alunite	CaAl₃(PO₄)(PO₃OH)(OH)₆			1	265489	310
Dolomite ()*	None	CaMg(CO₃)₂			2	265458,265483	9895
Dufrénite ()*	Dufrénite	Ca_0.5Fe²⁺Fe³⁺₅(PO₄)₄(OH)₆·2H₂O			1	265489	139
Fluorapatite ()*	Apatite	Ca₅(PO₄)₃F			1	265489	2740
Fluorite ()*	Fluorite	CaF₂	60	39	4	265455,265484,265488,265489	9617
Galena ()*	Rocksalt	PbS			3	265464,265474,265489	24243
Goethite ()*	Diaspore	FeO(OH)	60	39	1	265455	7437
Gold ()*	Copper	Au			20	265452,265453,265456,265457,265458,265460,265462,265464,265471,265473,265476,265477,265479,265481,265482,265483,265484,265485,265487,265489	30554
Gypsum ()*	Gypsum	Ca(SO₄)·2H₂O	60	39	0		6890
Hematite ()*	Corundum	Fe₂O₃			1	265483	14640
Hollandite ()*	Coronadite	Ba(Mn⁴⁺₆Mn³⁺₂)O₁₆			1	265489	243
Jarosite ()*	Alunite	KFe³⁺₃(SO₄)₂(OH)₆			1	265489	2228
Kaolinite ()*	Clay Kaolinite	Al₂Si₂O₅(OH)₄			2	265464,265489	5591
Löllingite ()*	Löllingite	FeAs₂			1	265489	762
Metauranocircite-I ()*	None	Ba(UO₂)₂(PO₄)₂·6H₂O	60	39	2	265455,265484	38
Meurigite-K ()*	Phosphofibrite	KFe³⁺₈(PO₄)₆(OH)₇·6.5H₂O			1	265489	21
Microcline ()*	Feldspar	K(AlSi₃O₈)			1	265489	4924
Minyulite ()*	None	KAl₂(PO₄)₂F·4H₂O			1	265489	31
Montgomeryite ()*	Calcioferrite	Ca₄MgAl₄(PO₄)₆(OH)₄·12H₂O			1	265489	44
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂			1	265489	17380
Nontronite ()*	Clay Smectite-vermiculite	Na_0.3Fe³⁺₂(Si,Al)₄O₁₀(OH)₂·nH₂O			1	265489	471
Nosean ()*	Sodalite Cancrinite-sodalite	Na₈(Si₆Al₆)O₂₄(SO₄)·H₂O	60	39	1	265454	75
Opal ()*	Amorphous	SiO₂·nH₂O	60	39	2	265455,265489	2994
Orthoclase ()*	Feldspar	K(AlSi₃O₈)			1	265489	2349
Pharmacosiderite ()*	Pharmacosiderite	KFe³⁺₄(AsO₄)₃(OH)₄·6-7H₂O			1	265489	428
Pyrite ()*	Pyrite	FeS₂			3	265471,265483,265489	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈			1	265483	9056
Quartz ()*	Quartz	SiO₂			3	265474,265483,265489	61156
Rhodochrosite ()*	Calcite	Mn(CO₃)			2	265459,265464	1711
Silver ()*	Copper	Ag			20	265452,265453,265456,265457,265458,265460,265462,265464,265471,265473,265476,265477,265479,265481,265482,265483,265484,265485,265487,265489	5186
Sphalerite ()*	Sphalerite	ZnS			1	265489	21482
Stibnite ()*	Stibnite	Sb₂S₃			1	265464	3418
Sylvanite ()*	Melonite	AgAuTe₄			1	265464	337
Tridymite ()*	Tridymite	SiO₂			1	265489	458
Uraninite ()*	Fluorite	UO₂	60	39	0		2718
Uranocircite-II ()*	None	Ba(UO₂)₂(PO₄)₂·10H₂O	60	39	1	265455	89
Variscite ()*	None	Al(PO₄)·2H₂O			1	265489	301
Zálesíite ()*	Mixite	CaCu₆(AsO₄)₂(AsO₃OH)(OH)₆·3H₂O			1	265489	84

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
	NAVDAT-2705	60	39	49+11/-10					2705						30932	Davier Mine, Annie Creek, Bald Mountain District, Lawrence Co., South Dakota, USA		NAVDAT		NAVDAT
	NAVDAT-92273	54.85	54.47	54.66±0.19					92273						30932	Davier Mine, Annie Creek, Bald Mountain District, Lawrence Co., South Dakota, USA		NAVDAT		NAVDAT

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...