Spruce Pine Area

Region East, Southeast
Mineral systems
Deposit types
Other minerals

Information leading to the delineation of this focus area

Basis for focus area The Spruce Pine mining district in Mitchell, Yancey and Avery counties, North Carolina, contains pegmatites that host many commodities. Production includes feldspar, mica, quartz (high purity). Beryl is reported from numerous mines, for example, Ray mine (Yancey County) and Crabtree mine (Mitchell County) in North Carolina. Polygon is drawn around mines reported to have beryl, including the McHone mine pegmatite; Ray mica mine pegmatite (Wray mine), Hurricane Mountain, Burnsville. Multiple pegmatite mines from the Spruce Pine district also contain columbite and tantalite.
Identified resources Historical and current production of feldspar, high purity quartz, and mica.
Production Production figures withheld.
Status Past and current mining.
Estimated resources Unknown but may be very large.
Geologic maps Brobst (1962), scale 1:24,000; Hadley and Nelson (1971), scale 1:250,000.
Geophysical data Inadequate Rank 3 aeromagnetic and Rank 5 aeroradiometric coverage.
Favorable rocks and structures Devonian LCT pegmatites intrude metagraywacke, schist and amphibolite of the Ashe Metamorphic Suite; pegmatites have long history of mining.
Deposits Avery, Mitchell, and Yancey counties: English Knob mine (MRDS dep_id: 10296639), Chalk Mountain mine (MRDS dep_id: 10074777), Randolph mine (MRDS dep_id: 10009176), Deake mine (MRDS dep_id: 10009177), Wiseman mine (MRDS dep_id: 10107760), Pink mine (MRDS dep_id: 10107761), Ray mica mine (MRDS dep_id: 10025083), McKinney mine (MRDS dep_id: 10026003), Hootowl mine (MRDS dep_id: 10025989).
Evidence from mineral occurrences MRDS; Stuckey (1965).
Geochemical evidence Unknown.
Geophysical evidence Unknown.
Evidence from other sources Brobst (1962) described the Spruce Pine mineral district.
Comments Spruce Pine pegmatite district contains multiple mineral commodities with on-going production of high-purity quartz, feldspar, and mica.
Cover thickness and description Bedrock exposed to <10 m cover.
Authors Arthur J. Merschat, Nora K. Foley, Bernard E. Hubbard.
New data needs Geophysics for framework geology, geochemical work on some of the smaller mines that are not in production in concert with mapping.
Geologic mapping and modeling needs Mapping of pegmatites.
Geophysical survey and modeling needs High resolution aeromagnetic and aeroradiometric coverage to help with framework geology: Aeromagnetic data may image mafic rocks, associated structures, and possibly alteration zones. Radiometric data can help with geologic mapping in vegetated terrane.
Digital elevation data needs Lidar adequate except for a tiny portion (<5%) in the northeast corner of the focus area outline.