Gap Lode Pegmatite, Unorganized District, Pennington Co., South Dakota, USA

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Granite pegmatite. About 9 km south of Hill City.

REF:Deposit:: U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707,P.72
Deposit:: ROBERTS, W.L., AND RAPP, GEORGE, 1965, MINERALOGY OF THE BLACK HILLS, SOUTH DAKOTA SCHOOL OF MINES AND TECHNOLOGY
Commodities (Major) - Feldspar, Mica
Development Status: Past Producer
Host Rock: Granite

Map Reference: 43°51'55"N , 103°33'34"W

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Mineral List:

Albite
Apatite-(CaF)
Apatite-(CaOH)
Childrenite

Heterosite
Leucophosphite
Microcline
Mitridatite

Muscovite
Quartz
Strengite
Triphylite

12 entries listed. 12 valid minerals.

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