Topsham tungsten

Region East, Northeast
Mineral systems
Deposit types
Other minerals

Information leading to the delineation of this focus area

Basis for focus area MRDS dep_ids: 10008774 (Bowdoinham), 10008773 (Topham).
Identified resources Unknown.
Production Unknown.
Status Unknown.
Estimated resources Unknown.
Geologic maps Hussey and West (2018), scale 1:24,000; West and Cubley (2010), scale 1:24,000.
Geophysical data Inadequate Rank 5 aeromagnetic and aeroradiometric coverage.
Favorable rocks and structures Limestone in early Paleozoic strata.
Deposits Bowdoinham (MRDS dep_ids: 10008774), Topham (MRDS dep_id: 10008773).
Evidence from mineral occurrences MRDS.
Geochemical evidence Favorable mineralogy and rock type.
Geophysical evidence Unknown.
Evidence from other sources Unknown.
Cover thickness and description Mostly thin glacial till with variable thickness and cover.
Authors John F. Slack.
New data needs Geochemistry, geologic mapping, and geophysical surveys.
Geologic mapping and modeling needs Detailed modern 1:24,000 scale mapping.
Geophysical survey and modeling needs High resolution aeromagnetic and aeroradiometric coverage.
Digital elevation data needs Lidar complete.