Bitterroot Range anorthosite

Region West, Northwest
States
Mineral systems
Deposit types
Commodities
Other minerals

Information leading to the delineation of this focus area

Basis for focus area Focus area is based on the outline of the Bitterroot Range Anorthosite as shown on the state geologic map compilation (Horton and others, 2017).
Identified resources None.
Production None.
Status Unknown.
Estimated resources Unknown.
Geologic maps Lonn and Berg (1996), scale 1:100,000.
Geophysical data Inadequate aeromagnetic and aeroradiometric coverage.
Favorable rocks and structures Bitterroot Range Anorthosite.
Deposits No known deposits.
Evidence from mineral occurrences None.
Geochemical evidence No data.
Geophysical evidence Unknown.
Evidence from other sources Unknown.
Comments No data supporting ilmenite resources associated with this anorthosite. Although garnet and titanium reported for placer workings nearby.
Cover thickness and description Exposed at the surface.
Authors Michael L. Zientek, Jane M. Hammarstrom, Kaleb C. Scarberry, Jay A. Gunderson.
New data needs Geologic mapping, geophysics, and lidar.
Geologic mapping and modeling needs Geologic mapping.
Geophysical survey and modeling needs High resolution airborne surveys where magmatic unconformities are suspected.
Digital elevation data needs Lidar inadequate.