Mitchell ore bed

Region East, Northeast
Mineral systems
Deposit types
Other minerals

Information leading to the delineation of this focus area

Basis for focus area Buffered point of Kinney-Cobble Mn mine (MRDS dep_id: 10100544); limonite (ocher of Burt, 1931). Other small deposits occur throughout Vermont and consist of kaolin, ocher, quartz, iron and Mn ores, and lignite. Also called "Brandon lignite".
Identified resources Historical production of iron.
Production Unknown.
Status Past mining; two shafts sunk in 1840 (Burt, 1931, p. 124).
Estimated resources Unknown, but likely minor.
Geologic maps Ratcliffe and Walsh (1998), scale 1:24,000.
Geophysical data Inadequate Rank 3 and 4 aeromagnetic and Rank 5 aeroradiometric coverage.
Favorable rocks and structures Ocher, kaolin deposits rest on limestone and carbonate (Burt, 1931). The unconsolidated deposits sit above bedrock but below glacial deposits. MRDS lists the Kinney-Cobble Mn mines (Mitchell ore bed iron mine) (Burt, 1931). Occurs above dolostone in the Forestdale Formation (Ratcliffe and Walsh, 1998).
Deposits Kinney-Cobble Mn mines (MRDS dep_id: 10100544).
Evidence from mineral occurrences MRDS.
Geochemical evidence See Watts (1990); stream sediment geochemistry shows stratabound Fe + Mn residual deposits extend the length of the Glens Falls quadrangle.
Geophysical evidence Unknown.
Evidence from other sources Unknown.
Comments Iron ore very rich in manganese (Burt, 1931, p. 124).
Cover thickness and description Variable limited cover and glacial cover estimated at 0-50 feet (Burt, 1931). Kaolin, ocher, lignite and ore deposits are up to 175 feet thick.
Authors Gregory J. Walsh, Bernard E. Hubbard.
New data needs Modern geochemical assay.
Geologic mapping and modeling needs Mapped locally at 1:24,000 (Ratcliffe and Walsh, 1998).
Geophysical survey and modeling needs High resolution aeromagnetic and aeroradiometric coverage.
Digital elevation data needs Lidar adequate.