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:
Robinson Bar District, Custer Co., Idaho, USA

Oldest recorded age at locality: 96.8
Youngest recorded age at locality: 74.5

mindat Locality ID: 276627
mindat URL: http://www.mindat.org/loc-276627.html

Tectonic Settings:

Total number of sublocalities beneath "Robinson Bar District, Custer Co., Idaho, USA": 15
Total number of bottom-level sublocalities: 15

Number of Child Localities: 15
Child Localities:
American Creek Prospect
Aspen Gulch Outcrop Occurrence
Bluebird Group
Burnt Bar Placer
Centauras Workings Placer
Cold Creek Bar Placer
Easy Bar Placer
Molly Hogan Group 1-22 (Peach Creek No. 2; Peach Creek Occurrence)
Patricia Ann Occurrence
Peach Creek Tungsten Claims
Robinson Bar Placer
Snake River Mining Company Placer
Taylor Placer
The Great Centennial Placer
Treon Creek Bar Placer

Latitude: 44°15'40"N
Longitude: 114°40'7"W
Decimal Degree (lat, lon): 44.261111111111,-114.66861111111

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.

Brannerite	Columbite	Copper	Corundum	Molybdenite	Nickeline	None	Pyrite	Pyroxene	Quartz
Rocksalt	Scheelite	Sphalerite	Spinel	Tetrahedrite	Titanite	Zircon

Augite ()*	Brannerite ()*	Euxenite-(Y) ()*	Galena ()*	Gold ()*
Hematite ()*	Ilmenite ()*	Magnetite ()*	Molybdenite ()*	Pyrite ()*
Pyrrhotite ()*	Quartz ()*	Scheelite ()*	Sphalerite ()*	Tetrahedrite-(Zn) ()*
Titanite ()*	Zircon ()*

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: Au Ca Ce Cu Fe Mg Mo Nb O Pb S Sb Si Ta Th Ti U W Y Zn Zr

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Brannerite Columbite Copper Corundum Molybdenite Nickeline None Pyrite Pyroxene Quartz
Rocksalt Scheelite Sphalerite Spinel Tetrahedrite Titanite Zircon

17 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
Augite ()*	Pyroxene	(Ca,Mg,Fe)₂Si₂O₆			2	207232,207241	2060
Brannerite ()*	Brannerite	UTi₂O₆			2	207232,207241	248
Euxenite-(Y) ()*	Columbite	Y(NbTi)O₆			2	207232,207241	414
Galena ()*	Rocksalt	PbS	82.5	74.5	1	207230	24243
Gold ()*	Copper	Au			1	207241	30554
Hematite ()*	Corundum	Fe₂O₃			7	207231,207232,207233,207234,207238,207240,207242	14640
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃			8	207231,207232,207233,207234,207238,207240,207241,207242	5433
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄			7	207231,207232,207233,207234,207238,207240,207242	14899
Molybdenite ()*	Molybdenite	MoS₂			1	207237	5800
Pyrite ()*	Pyrite	FeS₂	82.5	74.5	1	207230	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈			1	207237	9056
Quartz ()*	Quartz	SiO₂			1	207237	61156
Scheelite ()*	Scheelite	Ca(WO₄)			2	207236,207237	4894
Sphalerite ()*	Sphalerite	ZnS	82.5	74.5	1	207230	21482
Tetrahedrite-(Zn) ()*	Tetrahedrite	Cu₆(Cu₄Zn₂)Sb₄S₁₃	82.5	74.5	1	207230	5317
Titanite ()*	Titanite	CaTi(SiO₄)O			7	207231,207232,207233,207234,207238,207240,207242	4899
Zircon ()*	Zircon	Zr(SiO₄)			8	207231,207232,207233,207234,207238,207240,207241,207242	5251

3 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Sample Source	Sample Num	MinDat Locality ID	Dated Locality (Max Age)	Reference	Reference ID
NAVDAT-42270	96.8	79.2	88±8.8			42270	135592	American Creek Prospect, Robinson Bar District, Custer Co., Idaho, USA	NAVDAT	NAVDAT
USGS-Rb-Sr-02470	82.5	74.5	78.5±4	Rb-Sr	whole rock		136107	Bluebird Group, Robinson Bar District, Custer Co., Idaho, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-02471	82.5	74.5	78.5±4	Rb-Sr	biotite		136107	Bluebird Group, Robinson Bar District, Custer Co., Idaho, USA	USGS-Rb-Sr	USGS-Rb-Sr

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...