Northumberland district

Region West, Southwest
Mineral systems
Deposit types
Critical minerals
Other minerals

Information leading to the delineation of this focus area

Basis for focus area Barite past producers in MRDS.
Identified resources Historical production of barite.
Production Estimated production from the Northumberland mine from 1975 to 1983 was 1,100,000 metric tonnes ore.
Status Past mining.
Estimated resources Unknown.
Geologic maps Stewart and Carlson (1978), scale 1:500,000.
Geophysical data Inadequate Rank 4 aeromagnetic and Rank 5 aeroradiometric coverage.
Favorable rocks and structures Devonian Slaven Chert Formation; thin-bedded chert, siliceous argillite, shale, with minor limestone.
Deposits Northumberland mine (MRDS dep_id: 10173775), Old Soldier mine (MRDS dep_id: 10044317), Imco properties (MRDS dep_id: 10067314), Leisa Nos. 1 and 2 (MRDS dep_id: 10125425), Orocopter Nos. 1-34 (MRDS dep_id: 10174298), P & S mine (MRDS dep_id: 10198643), Ann (MRDS dep_id: 10222512).
Evidence from mineral occurrences MRDS.
Geochemical evidence Unknown.
Geophysical evidence Unknown.
Evidence from other sources Unknown.
Cover thickness and description Exposed at the surface-open-pit mining.
Authors David A. Ponce.
New data needs Geophysics.
Geologic mapping and modeling needs Current mapping inadequate.
Geophysical survey and modeling needs High resolution, Rank 1 aeromagnetic and aeroradiometric coverage and gravity survey needed.
Digital elevation data needs Lidar inadequate.