Blue Hill manganese prospects

Region East, Northeast
Mineral systems
Deposit types
Critical minerals
Other minerals

Information leading to the delineation of this focus area

Basis for focus area Buffered points as prospects or mines. See MRDS dep_ids: 10218662 (Blue Hill Manganese mine), and 10306815 (Granger mine).
Identified resources Historical production of manganese.
Production Unknown.
Status Past mining.
Estimated resources Unknown.
Geologic maps Osberg and others (1985); scale 1:500,000.
Geophysical data Inadequate Rank 5 aeromagnetic and aeroradiometric coverage.
Favorable rocks and structures Ellsworth Formation and nearby Devonian plutons host the Blue Hill and Granger mines. Other prospects occur in the Vassalboro and Sangerville Formations.
Deposits Blue Hill manganese mine (MRDS dep_id: 10218662), Granger mine (MRDS dep_id: 10306815).
Evidence from mineral occurrences MRDS.
Geochemical evidence Unknown.
Geophysical evidence Unknown.
Evidence from other sources Unknown.
Cover thickness and description Variable limited cover and glacial cover estimated at less than 2-50 m.
Authors Gregory J. Walsh, Bernard E. Hubbard.
New data needs Geologic mapping at 1:24,000 scale. Airborne geophysics. Evaluate locations on lidar.
Geologic mapping and modeling needs 1:24,000 scale mapping.
Geophysical survey and modeling needs High resolution aeromagnetic and aeroradiometric data to assist with framework geology such as structural features and contacts.
Digital elevation data needs Lidar adequate.