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White Cap Mine (King Mica Mine; Primer), Keystone, Keystone District, Pennington Co., South Dakota, USA
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Olmsteadite
White Cap Mine, Keystone, Keystone District, Pennington Co., South Dakota, USA
Latitude: 43°52'45"N
Longitude: 103°24'20"W
 
 
A pegmatite mine located in the NE¼ sec. 16, T.2S., R.6E.

Mineralization is an irregular, zoned pegmatite body in mica schist.

Workings include 2 large, open cuts.

Commodities (Major) - Mica, Feldspar, Beryllium; (Trace) - Lithium
Development Status: Past Producer
Host Rock: Mica Schist

Mineral List

Albite
var: Cleavelandite
Amblygonite
Arrojadite-(KFe)
Azurite
Beraunite
Bertrandite
Beryl
Cassiterite
Childrenite
'Columbite'
Columbite-(Fe)
'Columbite-Tantalite'
Ernstite
Ferrolaueite
Fluorapatite
Goyazite
Hureaulite
'Jahnsite'
Laueite
Lazulite
Lithiophilite
Löllingite
Ludlamite
Malachite
Messelite
Microcline
Microlite Group
Mitridatite
Montebrasite
Muscovite
Olmsteadite
'Perthite'
Phosphosiderite
Quartz
Scorzalite
Siderite
Sphalerite
Strunzite
'Tantalite'
Tetrahedrite
'Tourmaline'
Triphylite
Vivianite
Whitmoreite


45 entries listed. 36 valid minerals. 3 erroneous literature entries.

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References

Rocks & Min.: 60: 112; R&M 75:3 pp 156-169;
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).
Deposit:: USBM INFO CIRC 7707, P. 75-76.
Deposit:: ROBERTS, W. L., AND RAPP, GEORGE, 1965, MINERALOGY OF THE BLACK HILLS, SOUTH DAKOTA SCHOOL OF MINES AND TECHNOLOGY BULLETIN 18.
Production:: USBM INFO CIRC 7707, P. 76.

Norton, James J. (1964) Pegmatites and other Precambrian Rocks in the Southern Black Hills; Geology and mineral deposits of some pegmatites in the southern Black Hills, South Dakota. USGS Professional Paper 297E.

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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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