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

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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



44 entries listed. 35 valid minerals.

The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

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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