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Bob Ingersoll Mine (Ingersoll Mine; Ben Butler Mine; Horace Greely Mine), Keystone, Keystone District, Pennington Co., South Dakota, USA

Latitude: 43°54'21"N
Longitude: 103°26'46"W
Ref.: Dana 7:I:613; Rocks & Min.:10:147 & 60:112,116; Meeves, H., et al (1966), Reconnaissance of beryllium-bearing pegmatite deposits in six western states, US Bur. Mines Info. Circ. 8298: 33 (Table A-1).

A mica-lithium-feldspar-beryllium-tin-niobium-tantalum mine located in the NE¼ NW¼ sec. 6, T.2S., R.6E.

Mineralization is comprised of 5 zoned pegmatite dikes in quartz-mica schist.

Workings include open cuts, pits and underground development.

Mineral List

Albite
var: Cleavelandite

Almandine
'Amblygonite-Montebrasite Series'
Augelite
Autunite
Becquerelite
Beryl
Bismuth
Cassiterite
'Columbite'
Columbite-(Fe)
Elbaite
Fairfieldite
Fluorapatite
Fourmarierite
Greenockite
Heterosite
Hydroxylapatite
var: Carbonate-rich Hydroxylapatite

Ilmenite
'Jahnsite'
Kasolite
Lepidolite
Löllingite
Microcline
Microlite Group
Montebrasite
Muscovite
Pharmacosiderite
Quartz
Schorl
Sicklerite
Siderite
Sphalerite
Spodumene
Staurolite
'Tantalite'
'Tourmaline
var: Rubellite'

'var: Verdelite'
Triphylite
Triplite ?
Uraninite
Uranophane
Vandendriesscheite
Zircon


44 entries listed. 36 valid minerals.

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References

Moore, P. B., 2000, Analyses of Primary Phosphates from Pegmatites in Maine and Other Localities, in V. T. King (editor), Mineralogy of Maine. Mining History, Gems, and Geology, Maine Geological Survey, Augusta, Maine, p. 333-336.

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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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